/**
 * PetDiet Planner - Stylesheet
 * Desenvolvido por B20 Conteúdo Digital
 * https://www.b20.com.br
 */

/* ===== CSS VARIABLES ===== */
/* Dark Theme (Default) */
:root {
    /* Colors - Nike Training Club Inspired (Bold, Athletic, Dark) */
    --color-primary: #6F4E37;
    --color-primary-light: #A67B5B;
    --color-primary-dark: #3C2415;
    --color-accent: #C4915C;
    --color-accent-light: #E6D5AA;

    --color-bg: #0f0f0f;
    --color-bg-secondary: #1a1a1a;
    --color-bg-tertiary: #2a2a2a;
    --color-surface: #1f1f1f;
    --color-card: #252525;

    --color-text: #ffffff;
    --color-text-secondary: #cccccc;
    --color-text-muted: #999999;

    --color-success: #4ade80;
    --color-warning: #fbbf24;
    --color-error: #ef4444;
    --color-info: #3b82f6;

    /* Food Type Colors */
    --color-dry: #f59e0b;
    --color-wet: #3b82f6;
    --color-natural: #10b981;
    --color-snack: #ec4899;
}

/* Light Theme */
[data-theme="light"] {
    --color-primary: #8B4513;
    --color-primary-light: #D2691E;
    --color-primary-dark: #654321;
    --color-accent: #FF8C00;
    --color-accent-light: #FFE4B5;

    --color-bg: #ffffff;
    --color-bg-secondary: #f3e7d5;
    --color-bg-tertiary: #e9ecef;
    --color-surface: #ffffff;
    --color-card: #ffffff;

    --color-text: #212529;
    --color-text-secondary: #6c757d;
    --color-text-muted: #adb5bd;

    --color-success: #28a745;
    --color-warning: #ffc107;
    --color-error: #dc3545;
    --color-info: #17a2b8;

    --color-dry: #fd7e14;
    --color-wet: #0d6efd;
    --color-natural: #198754;
    --color-snack: #e83e8c;
}

/* ===== CSS VARIABLES ===== */
:root {
    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;

    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 12px 36px rgba(0, 0, 0, 0.6);

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);

    /* Typography */
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;

    /* Z-index */
    --z-modal: 1000;
    --z-toast: 2000;
    --z-nav: 100;
    --z-header: 90;
}

/* ===== RESET & BASE ===== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    font-weight: var(--font-weight-normal);
    line-height: 1.6;
    color: var(--color-text);
    background: var(--color-bg);
    padding-top: env(safe-area-inset-top);
    padding-bottom: env(safe-area-inset-bottom);
    min-height: 100vh;
    overflow-x: hidden;
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-weight-bold);
    line-height: 1.2;
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
}

h1 { font-size: 2.25rem; }
h2 { font-size: 1.75rem; }
h3 { font-size: 1.375rem; }
h4 { font-size: 1.125rem; }

p { margin-bottom: var(--spacing-md); }

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover { color: var(--color-accent-light); }

/* ===== APP HEADER ===== */
.app-header {
    position: sticky;
    top: 0;
    background: var(--color-bg-secondary);
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: var(--z-header);
    box-shadow: var(--shadow-lg);
    backdrop-filter: blur(12px);
    border-bottom: 3px solid var(--color-primary);
    min-height: 70px;
}

.header-content {
    width: 100%;
    max-width: 1200px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.app-logo {
    width: 45px;
    height: 45px;
    object-fit: contain;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.3));
   
}

/* Navigation Toggles */
.nav-toggle {
    background: transparent;
    border: 2px solid var(--color-primary);
    color: var(--color-primary);
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
}

.nav-toggle:hover {
    background: var(--color-primary);
    color: white;
    transform: scale(1.05);
}

.nav-toggle.active {
    background: var(--color-primary);
    color: white;
    box-shadow: var(--shadow-sm);
}

.nav-toggle i {
    transition: transform var(--transition-fast);
}

.nav-toggle.active i {
    transform: scale(1.1);
}

/* Navigation Toggles Container */
.nav-toggles {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
}

.app-title {
    font-size: 1.75rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-text);
    margin: 0;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    background: linear-gradient(135deg, var(--color-text), var(--color-accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}


/* ===== MAIN CONTENT ===== */
.main-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-xl) var(--spacing-lg);

    width: 100%;
    overflow-x: hidden;
    overscroll-behavior-y: none; /* Prevent vertical overscroll in main content */
}

.view-section {
    display: none;
    animation: fadeIn var(--transition-base);
}

.view-section.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===== CALENDAR SECTION ===== */
.calendar-header {
    background: var(--color-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    border: 2px solid transparent;
    transition: all var(--transition-base);
}

.calendar-header:hover {
    border-color: var(--color-primary);
}

.header-left {
    margin-bottom: var(--spacing-md);
}

#calendar-title {
    margin: 0 0 var(--spacing-sm) 0;
    color: var(--color-text);
    font-size: 1.75rem;
    font-weight: var(--font-weight-bold);
}

.week-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.current-week {
    color: var(--color-text-secondary);
    font-size: 0.875rem;
    font-weight: var(--font-weight-medium);
}

.week-nav {
    display: flex;
    gap: var(--spacing-xs);
}

.btn-nav {
    background: var(--color-bg-tertiary);
    color: var(--color-text-secondary);
    border: 1px solid var(--color-bg-secondary);
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
}

.btn-nav:hover:not(:disabled) {
    background: var(--color-primary);
    color: var(--color-text);
    border-color: var(--color-primary);
}

.btn-nav:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-today {
    background: var(--color-accent);
    color: var(--color-text);
    border-color: var(--color-accent);
}

.btn-today:hover:not(:disabled) {
    background: var(--color-accent-light);
}

.header-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    justify-content: flex-end;
}

.view-controls {
    display: flex;
    gap: var(--spacing-sm);
}

.btn-toggle-view {
    background: var(--color-bg-tertiary);
    color: var(--color-text-secondary);
    border: 1px solid var(--color-bg-secondary);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.875rem;
    font-weight: var(--font-weight-medium);
}

.btn-toggle-view:hover {
    background: var(--color-primary);
    color: var(--color-text);
    border-color: var(--color-primary);
}

.btn-toggle-view.active {
    background: var(--color-primary);
    color: var(--color-text);
    border-color: var(--color-primary);
}

.view-label {
    display: none;
}

@media (min-width: 480px) {
    .calendar-header {
        display: flex;
        justify-content: space-between;
        align-items: flex-start;
    }

    .header-left,
    .header-right {
        margin-bottom: 0;
    }

    .view-label {
        display: inline;
    }
}

.btn-add-floating {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
    color: var(--color-text);
    border: none;
    width: 56px;
    height: 56px;
    border-radius: var(--radius-full);
    font-size: 1.5rem;
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.btn-add-floating:hover {
    transform: scale(1.15) rotate(90deg);
    box-shadow: var(--shadow-xl);
    background: linear-gradient(135deg, var(--color-primary-light), var(--color-accent));
}

.btn-add-floating:active {
    transform: scale(1.05) rotate(90deg);
}

/* ===== PERIOD FILTER BAR ===== */
.period-filter {
    background: var(--color-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    width: 100%;
}

/* Smart responsive filter tabs using CSS Grid */
.filter-tabs {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: var(--spacing-sm);
    width: 100%;
    min-width: 0; /* Allow shrinking */
}

/* Ensure no horizontal overflow */
.filter-tabs {
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
    -webkit-overflow-scrolling: touch;
    scroll-behavior: smooth;
    padding-bottom: var(--spacing-xs);
}

.filter-tabs::-webkit-scrollbar {
    display: none;
}

/* Responsive adjustments */
@media (min-width: 1200px) {
    /* Large desktop: optimal spacing */
    .filter-tabs {
        grid-template-columns: repeat(4, 1fr);
        gap: var(--spacing-lg);
        justify-items: center;
        overflow-x: visible;
    }
}

@media (min-width: 1024px) and (max-width: 1199px) {
    /* Desktop: 4 columns or auto-fit */
    .filter-tabs {
        grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
        gap: var(--spacing-md);
        overflow-x: visible;
    }
}

@media (min-width: 768px) and (max-width: 1023px) {
    /* Tablet: flexible grid */
    .filter-tabs {
        grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
        gap: var(--spacing-sm);
    }
}

@media (min-width: 640px) and (max-width: 767px) {
    /* Large mobile: 2 columns */
    .filter-tabs {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-sm);
        overflow-x: visible;
    }
}

@media (min-width: 480px) and (max-width: 639px) {
    /* Medium mobile: single row with scroll */
    .filter-tabs {
        grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
        gap: var(--spacing-xs);
        overflow-x: auto;
    }
}

@media (max-width: 479px) {
    /* Small mobile: compact single row */
    .filter-tabs {
        grid-template-columns: repeat(4, 1fr);
        gap: var(--spacing-xs);
        overflow-x: auto;
        padding-left: var(--spacing-xs);
        padding-right: var(--spacing-xs);
    }

    .filter-tab {
        padding: var(--spacing-sm) var(--spacing-xs);
        font-size: 0.8rem;
        min-width: 0;
    }

    .filter-tab i {
        font-size: 0.85rem;
        margin-right: var(--spacing-xs);
    }

    .meal-count {
        font-size: 0.7rem;
        min-width: 16px;
        padding: 2px 6px;
    }
}

/* Ultra small screens */
@media (max-width: 360px) {
    .filter-tabs {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-xs);
    }

    .filter-tab {
        padding: var(--spacing-xs) var(--spacing-xs);
        font-size: 0.75rem;
    }

    .filter-tab span:not(.meal-count) {
        display: none;
    }

    .filter-tab i {
        margin-right: 0;
    }
}

.filter-tab {
    background: var(--color-bg-tertiary);
    color: var(--color-text-secondary);
    border: 2px solid transparent;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.875rem;
    font-weight: var(--font-weight-medium);
    white-space: nowrap;
    min-width: fit-content;
    position: relative;
    box-shadow: var(--shadow-sm);
    margin: 5px;
}

.filter-tab:hover {
    background: var(--color-bg-secondary);
    color: var(--color-text);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.filter-tab.active {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
    color: var(--color-text);
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
    margin: 5px;
}

.filter-tab i {
    font-size: 1rem;
}

.meal-count {
    background: var(--color-bg-secondary);
    color: var(--color-text-muted);
    padding: 2px var(--spacing-xs);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: var(--font-weight-bold);
    min-width: 20px;
    text-align: center;
}

.filter-tab.active .meal-count {
    background: rgba(255, 255, 255, 0.2);
    color: var(--color-text);
}

/* ===== STATS BAR ===== */
.stats-bar {
    display: flex;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md);
    background: var(--color-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
    min-width: 0;
    -webkit-overflow-scrolling: touch;
    scroll-behavior: smooth;
    justify-content: flex-start;
}

.stats-bar::-webkit-scrollbar {
    display: none;
}

/* Responsive stats bar */
@media (min-width: 1024px) {
    /* Desktop: show all stats without scroll */
    .stats-bar {
        justify-content: center;
        gap: var(--spacing-xl);
        overflow-x: visible;
    }
}

@media (min-width: 768px) and (max-width: 1023px) {
    /* Tablet: balanced spacing with scroll if needed */
    .stats-bar {
        gap: var(--spacing-lg);
        padding-left: var(--spacing-md);
        padding-right: var(--spacing-md);
    }
}

@media (min-width: 480px) and (max-width: 767px) {
    /* Mobile: compact layout */
    .stats-bar {
        gap: var(--spacing-md);
        padding-left: var(--spacing-sm);
        padding-right: var(--spacing-sm);
        margin-left: calc(-1 * var(--spacing-sm));
        margin-right: calc(-1 * var(--spacing-sm));
    }
}

@media (max-width: 479px) {
    /* Small mobile: stacked/distributed layout */
    .stats-bar {
        gap: var(--spacing-sm);
        padding: var(--spacing-sm);
        margin: 0 calc(-1 * var(--spacing-sm)) var(--spacing-lg);
        border-radius: 0;
        justify-content: space-around;
    }

    .stat-item {
        flex: 1;
        text-align: center;
        min-width: 0;
        flex-direction: column;
        gap: var(--spacing-xs);
    }

    .stat-label {
        display: block;
        font-size: 0.7rem;
        margin-bottom: var(--spacing-xs);
    }

    .stat-value {
        display: block;
        font-size: 1.1rem;
        font-weight: var(--font-weight-bold);
        margin-top: 0;
    }
}

.stat-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--color-text-secondary);
    font-size: 0.875rem;
    white-space: nowrap;
}

.stat-item i {
    color: var(--color-primary);
    width: 16px;
}

.stat-label {
    font-weight: var(--font-weight-medium);
}

.stat-value {
    color: var(--color-text);
    font-weight: var(--font-weight-bold);
    margin-left: var(--spacing-xs);
}


/* ===== CALENDAR CONTAINER ===== */
.calendar-container {
    position: relative;
    margin-bottom: var(--spacing-xl);
    overflow-x: hidden;
    width: 100%;
}

/* ===== CALENDAR GRID ===== */
.calendar-grid {
    display: grid;
    grid-template-rows: repeat(7, auto);
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
    width: 100%;
}

.calendar-day {
    display: grid;
    grid-template-columns: auto 1fr 1fr 1fr;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    align-items: start;
    border-bottom: 1px solid var(--color-bg-secondary);
    transition: all var(--transition-base);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-sm);
}

.calendar-day:last-child {
    border-bottom: none;
    margin-bottom: 0;
}

.calendar-day:hover {
    background: var(--color-bg-tertiary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.day-header {
    padding: var(--spacing-sm);
    border-right: 2px solid var(--color-primary);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    writing-mode: vertical-rl;
    text-orientation: mixed;
}

.day-name {
    font-size: 0.75rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    writing-mode: vertical-rl;
    text-orientation: mixed;
    transform: rotate(180deg);
}

.period-slot {
    margin: 0;
    padding: var(--spacing-md);
    background: var(--color-bg-tertiary);
    border: 2px solid var(--color-bg-secondary);
    border-radius: var(--radius-md);
    min-height: 80px;
    transition: all var(--transition-fast);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.period-slot:first-child {
    border-left: none;
}

.period-slot:not(:first-child) {
    border-left: 1px solid var(--color-bg-secondary);
}

.period-slot.drag-over {
    background: var(--color-primary-dark);
    border-color: var(--color-primary);
    border-style: solid;
}

.period-slot.has-meals {
    border-color: var(--color-primary);
    background: rgba(111, 78, 55, 0.05);
}

.period-slot.empty {
    opacity: 0.6;
}

.period-slot.empty:hover {
    opacity: 1;
    background: var(--color-bg-secondary);
}

.period-label {
    position: absolute;
    top: 4px;
    left: 4px;
    font-size: 0.6rem;
    background: rgba(0, 0, 0, 0.7);
    color: white;
    padding: 2px 6px;
    border-radius: var(--radius-sm);
    z-index: 1;
    font-weight: var(--font-weight-medium);
}

/* ===== MEAL CARD ===== */
.meal-card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    cursor: grab;
    transition: all var(--transition-base);
    border-left: 5px solid var(--color-primary);
    box-shadow: var(--shadow-md);
    margin-bottom: var(--spacing-sm);
    position: relative;
    overflow: hidden;
    border: 1px solid transparent;
}

.meal-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.meal-card:hover {
    transform: translateY(-4px) scale(1.02);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary);
}

.meal-card:hover::before {
    opacity: 1;
}

.meal-card:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
    box-shadow: var(--shadow-md), 0 0 0 4px rgba(111, 78, 55, 0.2);
}

.meal-card:active {
    cursor: grabbing;
    transform: scale(0.98);
}

.meal-card.dragging {
    opacity: 0.5;
    cursor: grabbing;
    transform: rotate(5deg);
    z-index: 1000;
}

.meal-card[data-food-type="dry"] {
    border-left-color: var(--color-dry);
}

.meal-card[data-food-type="dry"]::before {
    background: var(--color-dry);
}

.meal-card[data-food-type="wet"] {
    border-left-color: var(--color-wet);
}

.meal-card[data-food-type="wet"]::before {
    background: var(--color-wet);
}

.meal-card[data-food-type="natural"] {
    border-left-color: var(--color-natural);
}

.meal-card[data-food-type="natural"]::before {
    background: var(--color-natural);
}

.meal-card[data-food-type="snack"] {
    border-left-color: var(--color-snack);
}

.meal-card[data-food-type="snack"]::before {
    background: var(--color-snack);
}

.meal-card.empty {
    border-style: dashed;
    border-left-style: solid;
    background: transparent;
    color: var(--color-text-muted);
    justify-content: center;
    align-items: center;
    min-height: 60px;
    cursor: pointer;
}

.meal-card.empty:hover {
    background: var(--color-bg-tertiary);
    color: var(--color-text-secondary);
}

.meal-card.empty .meal-type,
.meal-card.empty .meal-info,
.meal-card.empty .meal-portion {
    display: none;
}

.meal-card.empty::after {
    content: '+ Adicionar';
    font-size: 0.875rem;
    font-weight: var(--font-weight-medium);
}

.meal-type {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
}

.meal-info {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    font-weight: var(--font-weight-medium);
}

.meal-portion {
    font-size: 0.875rem;
    color: var(--color-text);
    margin-top: var(--spacing-xs);
    font-weight: var(--font-weight-semibold);
}

.meal-supplements {
    font-size: 0.75rem;
    color: var(--color-accent);
    margin-top: var(--spacing-xs);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}


/* ===== MODAL ===== */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.85);
    z-index: var(--z-modal);
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
    backdrop-filter: blur(4px);
    animation: modalFadeIn var(--transition-base);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
}

.modal.active {
    display: flex;
}

@keyframes modalFadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.modal-content {
    background: var(--color-card);
    border-radius: var(--radius-lg);
    max-width: 500px;
    width: 90vw;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
    animation: modalSlideUp var(--transition-base);
    border: 2px solid var(--color-primary);
    margin: var(--spacing-md);
    align-self: start;
    overscroll-behavior-y: contain; /* Prevent overscroll bounce in modal */
}

@keyframes modalSlideUp {
    from {
        transform: translateY(50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg);
    border-bottom: 2px solid var(--color-primary);
}

.modal-header h3 {
    margin: 0;
    font-size: 1.5rem;
    color: var(--color-text);
}

.btn-close-modal {
    background: transparent;
    border: none;
    color: var(--color-text-muted);
    font-size: 1.5rem;
    cursor: pointer;
    padding: var(--spacing-xs);
    transition: all var(--transition-fast);
    border-radius: var(--radius-sm);
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-close-modal:hover {
    background: var(--color-bg-tertiary);
    color: var(--color-error);
}

.modal-body {
    padding: var(--spacing-lg);
}

.modal-actions {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    border-top: 2px solid var(--color-primary);
    justify-content: flex-end;
}

/* Responsive modal improvements */
@media (max-width: 767px) {
    .modal-content {
        width: 95vw;
        max-width: none;
        margin: var(--spacing-sm);
        max-height: 80vh;
        border-radius: var(--radius-md);
        align-self: start;
    }

    .modal-header {
        padding: var(--spacing-md);
        flex-wrap: wrap;
        gap: var(--spacing-sm);
    }

    .modal-header h3 {
        font-size: 1.25rem;
        flex: 1;
        min-width: 0;
    }

    .btn-close-modal {
        width: 40px;
        height: 40px;
        font-size: 1.25rem;
        align-self: flex-start;
    }

    .modal-body {
        padding: var(--spacing-md);
    }

    .modal-actions {
        padding: var(--spacing-md);
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .modal-actions .btn {
        width: 100%;
        justify-content: center;
        padding: var(--spacing-md);
    }
}

@media (min-width: 768px) and (max-width: 1023px) {
    .modal-content {
        max-width: 600px;
        margin: var(--spacing-lg);
    }

    .modal-actions {
        gap: var(--spacing-lg);
    }
}

@media (min-width: 1024px) {
    .modal-content {
        max-width: 500px;
        margin: var(--spacing-xl);
    }
}

/* Meal details responsive */
.meal-details {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.detail-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--color-bg-tertiary);
}

.detail-row:last-child {
    border-bottom: none;
}

.detail-row strong {
    color: var(--color-text-secondary);
    font-weight: var(--font-weight-semibold);
    min-width: 100px;
}

.detail-row span {
    color: var(--color-text);
    text-align: right;
    flex: 1;
}

@media (max-width: 767px) {
    .detail-row {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-xs);
        padding: var(--spacing-md) 0;
    }

    .detail-row strong {
        min-width: auto;
        font-size: 0.9rem;
    }

    .detail-row span {
        text-align: left;
        font-size: 0.95rem;
    }
}

/* ===== FORM ELEMENTS ===== */
.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-group label {
    display: block;
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
    font-size: 0.875rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid var(--color-bg-tertiary);
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-family: var(--font-sans);
    background: var(--color-bg-secondary);
    color: var(--color-text);
    transition: all var(--transition-fast);
    min-height: 48px;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(111, 78, 55, 0.2);
}

.form-group input:invalid:not(:placeholder-shown),
.form-group select:invalid:not(:placeholder-shown),
.form-group textarea:invalid:not(:placeholder-shown) {
    border-color: var(--color-error);
}

.form-group small {
    display: block;
    margin-top: var(--spacing-xs);
    color: var(--color-text-muted);
    font-size: 0.75rem;
}

.input-with-unit {
    display: flex;
    gap: var(--spacing-sm);
}

.input-with-unit input {
    flex: 1;
}

.input-with-unit select {
    width: 120px;
}

/* ===== BUTTONS ===== */
.btn {
    padding: var(--spacing-md) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: var(--font-weight-semibold);
    cursor: pointer;
    transition: all var(--transition-base);
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    min-height: 48px;
    justify-content: center;
    box-shadow: var(--shadow-sm);
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.btn:active {
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
    color: var(--color-text);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--color-primary-light), var(--color-accent));
}

.btn-secondary {
    background: var(--color-bg-tertiary);
    color: var(--color-text);
}

.btn-secondary:hover {
    background: var(--color-bg-secondary);
}

.btn-danger {
    background: var(--color-error);
    color: var(--color-text);
}

.btn-danger:hover {
    background: #dc2626;
}

/* ===== FAQ SECTION ===== */
.faq-section {
    max-width: 800px;
    margin: 0 auto;
}

.faq-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.faq-item {
    background: var(--color-card);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    border: 2px solid transparent;
    transition: all var(--transition-base);
}

.faq-item:hover {
    border-color: var(--color-primary);
}

.faq-question {
    width: 100%;
    padding: var(--spacing-lg);
    background: transparent;
    border: none;
    color: var(--color-text);
    font-size: 1.125rem;
    font-weight: var(--font-weight-semibold);
    text-align: left;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all var(--transition-fast);
    min-height: 48px;
}

.faq-question:hover {
    background: var(--color-bg-tertiary);
}

.faq-icon {
    font-size: 1.5rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
    transition: transform var(--transition-base);
}

.faq-question[aria-expanded="true"] .faq-icon {
    transform: rotate(45deg);
}

.faq-answer {
    padding: 0 var(--spacing-lg) var(--spacing-lg);
    color: var(--color-text-secondary);
    line-height: 1.8;
    animation: fadeIn var(--transition-base);
}

.faq-answer[hidden] {
    display: none;
}

.faq-answer p {
    margin: 0;
}

/* ===== SETTINGS SECTION ===== */
.settings-section {
    max-width: 100%;
    padding: 0 var(--spacing-md);
}

.settings-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
    padding: var(--spacing-xl) 0;
}

.settings-header h1 {
    font-size: 2rem;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
    font-weight: var(--font-weight-bold);
}

.settings-subtitle {
    color: var(--color-text-secondary);
    font-size: 1rem;
    margin: 0;
    max-width: 400px;
    margin: 0 auto;
}

.settings-grid {
    display: grid;
    gap: var(--spacing-lg);
    max-width: 1200px;
    margin: 0 auto;
}

/* ===== SETTINGS CARDS ===== */
.settings-card {
    background: var(--color-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 2px solid var(--color-bg-secondary);
    overflow: hidden;
    transition: all var(--transition-base);
}

.settings-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary-light);
}

.card-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
    color: white;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.card-header i {
    font-size: 1.5rem;
    opacity: 0.9;
}

.card-header h3 {
    margin: 0;
    font-size: 1.25rem;
    font-weight: var(--font-weight-semibold);
}

.card-content {
    padding: var(--spacing-lg);
}

/* ===== FORM ELEMENTS ===== */
.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-group:last-child {
    margin-bottom: 0;
}

.form-group label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
    font-size: 1rem;
}

.form-group label i {
    color: var(--color-primary);
    font-size: 1.125rem;
    width: 18px;
    text-align: center;
}

.input-wrapper,
.select-wrapper {
    position: relative;
}

.form-input,
.form-select {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-md) var(--spacing-md) 44px;
    border: 2px solid var(--color-bg-tertiary);
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-family: var(--font-sans);
    background: var(--color-bg-secondary);
    color: var(--color-text);
    transition: all var(--transition-fast);
    appearance: none;
}

.form-input:focus,
.form-select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(111, 78, 55, 0.1);
}

.input-icon,
.select-icon {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-muted);
    font-size: 1rem;
    pointer-events: none;
}

.select-icon {
    right: 12px;
    left: auto;
}

.form-help {
    display: block;
    margin-top: var(--spacing-xs);
    color: var(--color-text-secondary);
    font-size: 0.875rem;
    line-height: 1.4;
}

.theme-toggle-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: var(--color-bg-tertiary);
    border: 2px solid var(--color-bg-secondary);
    border-radius: var(--radius-md);
    color: var(--color-text);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 1rem;
    font-weight: var(--font-weight-medium);
    width: 100%;
    text-align: left;
    justify-content: flex-start;
}

.theme-toggle-btn:hover {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.theme-toggle-btn i {
    font-size: 1.25rem;
    transition: transform var(--transition-fast);
}

.theme-toggle-btn[data-theme="light"] i {
    color: var(--color-accent);
}

.theme-toggle-btn[data-theme="light"]:hover i {
    color: white;
}

/* ===== DANGER ZONE ===== */
.danger-card {
    border-color: var(--color-error);
}

.danger-card .card-header {
    background: linear-gradient(135deg, var(--color-error), #dc2626);
}

.danger-zone {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.danger-info {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.2);
    border-radius: var(--radius-md);
}

.danger-info i {
    color: var(--color-error);
    font-size: 1.5rem;
    margin-top: var(--spacing-xs);
}

.danger-info h4 {
    margin: 0 0 var(--spacing-xs) 0;
    color: var(--color-error);
    font-size: 1rem;
    font-weight: var(--font-weight-semibold);
}

.danger-info p {
    margin: 0;
    color: var(--color-text-secondary);
    font-size: 0.875rem;
    line-height: 1.5;
}

.action-buttons {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.btn-export-data,
.btn-danger {
    flex: 1;
    min-width: 200px;
    padding: var(--spacing-md) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: var(--font-weight-semibold);
    cursor: pointer;
    transition: all var(--transition-base);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    text-decoration: none;
}

.btn-export-data {
    background: var(--color-primary);
    color: white;
}

.btn-export-data:hover {
    background: var(--color-primary-light);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-danger {
    background: var(--color-error);
    color: white;
}

.btn-danger:hover {
    background: #dc2626;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.danger-note {
    padding: var(--spacing-md);
    background: rgba(239, 68, 68, 0.05);
    border: 1px solid rgba(239, 68, 68, 0.1);
    border-radius: var(--radius-md);
}

.danger-note p {
    margin: 0;
    color: var(--color-text-secondary);
    font-size: 0.875rem;
    line-height: 1.5;
}

/* ===== ABOUT CARD ===== */
.about-card .card-header {
    background: linear-gradient(135deg, var(--color-accent), var(--color-accent-light));
}

/* Reorganized card content with proper spacing and structure */
.card-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.app-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    padding: var(--spacing-lg);
    background: var(--color-bg-secondary);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-bg-tertiary);
}

.app-logo {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--color-primary);
    min-width: 120px;
}

.app-logo i {
    font-size: 2.5rem;
    opacity: 0.8;
}

.app-logo span {
    font-size: 1rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-text);
    text-align: center;
}

.app-details {
    flex: 1;
    min-width: 0; /* Allow text to wrap */
}

.version-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
}

.version {
    background: var(--color-primary);
    color: white;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: var(--font-weight-semibold);
    white-space: nowrap;
}

.status {
    color: var(--color-success);
    font-size: 0.875rem;
    font-weight: var(--font-weight-medium);
}

.app-description {
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin: 0;
    font-size: 0.9rem;
}

.developer-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: var(--color-bg-secondary);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-bg-tertiary);
}

.developer-info h4 {
    margin: 0;
    color: var(--color-text);
    font-size: 1rem;
    font-weight: var(--font-weight-semibold);
}

.developer-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-md);
    text-decoration: none;
    color: var(--color-text);
    transition: all var(--transition-fast);
    border: 1px solid var(--color-bg-tertiary);
    margin-top: var(--spacing-sm);
}

.developer-link:hover {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.developer-link i {
    font-size: 1rem;
    opacity: 0.7;
    flex-shrink: 0;
}

.developer-url {
    color: var(--color-text-secondary);
    font-size: 0.875rem;
    font-weight: var(--font-weight-medium);
}

.developer-link:hover .developer-url {
    color: rgba(255, 255, 255, 0.9);
}

.features-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: var(--color-bg-secondary);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-bg-tertiary);
}

.features-list h4 {
    margin: 0;
    color: var(--color-text);
    font-size: 1rem;
    font-weight: var(--font-weight-semibold);
}

.feature-tags {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: var(--spacing-sm);
}

.feature-tag {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-bg-tertiary);
    color: var(--color-text-secondary);
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    font-weight: var(--font-weight-medium);
    text-align: center;
    border: 1px solid var(--color-bg-tertiary);
    transition: all var(--transition-fast);
}

.feature-tag:hover {
    background: var(--color-primary);
    color: white;
    transform: translateY(-1px);
}

.feature-tag i {
    color: var(--color-primary);
    font-size: 0.9rem;
    flex-shrink: 0;
}

.feature-tag:hover i {
    color: white;
}

/* ===== TOAST NOTIFICATION ===== */
.toast {
    position: fixed;
    bottom: 80px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--color-surface);
    color: var(--color-text);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-lg);
    opacity: 0;
    transition: all var(--transition-base);
    z-index: var(--z-toast);
    box-shadow: var(--shadow-xl);
    min-width: 280px;
    text-align: center;
    font-weight: var(--font-weight-medium);
    border: 2px solid var(--color-primary);
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

.toast.success { border-color: var(--color-success); }
.toast.error { border-color: var(--color-error); }
.toast.warning { border-color: var(--color-warning); }
.toast.info { border-color: var(--color-info); }

/* ===== EMPTY STATE ===== */
.empty-state {
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-2xl);
    background: var(--color-card);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    margin: var(--spacing-lg) auto var(--spacing-2xl);
    max-width: 500px;
    border: 3px dashed var(--color-primary);
    position: relative;
    overflow: hidden;
}

.empty-state::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent), var(--color-primary));
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.empty-state i {
    font-size: 4rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-lg);
}

.empty-state h3 {
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
}

.empty-state p {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
}

/* ===== FOOTER ===== */
.app-footer {
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-md);
    background: var(--color-bg-secondary);
    color: var(--color-text-secondary);
    margin-top: var(--spacing-2xl);
    border-top: 2px solid var(--color-primary);
}

.app-footer p {
    margin-bottom: var(--spacing-sm);
}

.b20-link {
    color: var(--color-accent);
    font-weight: var(--font-weight-semibold);
    text-decoration: none;
    transition: all var(--transition-fast);
}

.b20-link:hover {
    color: var(--color-accent-light);
    text-decoration: underline;
    transform: scale(1.05);
    display: inline-block;
}

.footer-links {
    margin-top: var(--spacing-md);
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    align-items: center;
}

.footer-links a {
    color: var(--color-text-secondary);
    font-size: 0.875rem;
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--color-accent);
}

/* ===== ACCESSIBILITY ===== */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

:focus-visible {
    outline: 3px solid var(--color-accent);
    outline-offset: 2px;
    box-shadow: 0 0 0 6px rgba(196, 145, 92, 0.2);
}

/* ===== RESPONSIVE DESIGN ===== */

/* Base styles - Mobile First (320px+) */
/* Prevent horizontal overflow globally */
* {
    max-width: 100%;
    box-sizing: border-box;
}

html, body {
    overflow-x: hidden;
    width: 100%;
    min-width: 0;
    overscroll-behavior-y: none; /* Prevent vertical overscroll bounce */
    overscroll-behavior-x: none; /* Prevent horizontal overscroll bounce */
    /* Webkit fallback for older browsers */
    -webkit-overflow-scrolling: touch;
}

/* Mobile header optimization */
@media (max-width: 767px) {
    .app-header {
        padding: var(--spacing-sm) var(--spacing-md);
        min-height: 60px;
    }

    .logo-container {
        gap: var(--spacing-md);
    }

    .app-logo {
        width: 45px;
        height: 45px;
    }

    .app-title {
        font-size: 1.25rem;
        letter-spacing: 1px;
    }

    .nav-toggles {
        gap: var(--spacing-xs);
    }

    .main-content {
        padding: var(--spacing-md) var(--spacing-sm);
    }
}

/* ===== RESPONSIVE ADJUSTMENTS ===== */

/* Force stacked layout on very small screens */
@media (max-width: 479px) {
    .calendar-day {
        grid-template-columns: 1fr;
        grid-template-rows: auto auto auto auto;
        gap: var(--spacing-xs);
    }

    .day-header {
        grid-column: 1 / -1;
        writing-mode: horizontal-tb;
        text-orientation: mixed;
        border-right: none;
        border-bottom: 2px solid var(--color-primary);
        height: auto;
        padding: var(--spacing-sm) 0;
    }

    .day-name {
        writing-mode: horizontal-tb;
        text-orientation: mixed;
        transform: none;
        font-size: 0.875rem;
    }

    .period-slot {
        border: 2px dashed var(--color-text-muted);
        border-radius: var(--radius-sm);
        margin-bottom: var(--spacing-xs);
    }

    .period-slot:last-child {
        margin-bottom: 0;
    }

    .period-slot:first-child,
    .period-slot:not(:first-child) {
        border-left: 2px dashed var(--color-text-muted);
        border-top: 2px dashed var(--color-text-muted);
    }
}

/* ===== SETTINGS RESPONSIVE ===== */

/* Small Mobile (320px - 479px) - Single Column */
@media (max-width: 479px) {
    .settings-header {
        margin-bottom: var(--spacing-xl);
        padding: var(--spacing-lg) var(--spacing-sm);
    }

    .settings-header h1 {
        font-size: 1.75rem;
    }

    .settings-subtitle {
        font-size: 0.875rem;
    }

    .settings-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
        padding: 0 var(--spacing-sm);
    }

    .card-header {
        padding: var(--spacing-md);
    }

    .card-header h3 {
        font-size: 1.125rem;
    }

    .card-content {
        padding: var(--spacing-md);
    }

    /* Responsive about section */
    .card-content {
        gap: var(--spacing-lg);
    }

    .app-info {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-md);
        padding: var(--spacing-md);
    }

    .app-logo {
        min-width: auto;
    }

    .app-details {
        text-align: center;
        margin-top: 40px;
    }

    .developer-info,
    .features-list {
        padding: var(--spacing-md);
    }

    .feature-tags {
        grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    }

    .feature-tag {
        padding: var(--spacing-sm);
        font-size: 0.75rem;
    }

    .action-buttons {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .btn-export-data,
    .btn-danger {
        min-width: auto;
        width: 100%;
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: 0.875rem;
    }

    .feature-tags {
        justify-content: center;
        gap: var(--spacing-xs);
    }

    .feature-tag {
        font-size: 0.7rem;
        padding: 4px var(--spacing-xs);
    }
}

/* Mobile (480px - 767px) */
@media (min-width: 480px) and (max-width: 767px) {
    .settings-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

    .card-header {
        padding: var(--spacing-lg);
    }

    .card-content {
        padding: var(--spacing-lg);
    }

    .action-buttons {
        flex-direction: row;
        gap: var(--spacing-md);
    }

    .btn-export-data,
    .btn-danger {
        min-width: 120px;
        flex: 1;
    }
}

/* Tablet (768px - 1023px) */
@media (min-width: 768px) {
    .settings-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }

    .settings-header h1 {
        font-size: 2.25rem;
    }

    .settings-subtitle {
        font-size: 1.125rem;
    }

    .card-header {
        padding: var(--spacing-xl);
    }

    .card-header h3 {
        font-size: 1.375rem;
    }

    .card-content {
        padding: var(--spacing-xl);
    }

    .nav-toggle {
        width: 44px;
        height: 44px;
        font-size: 1.125rem;
    }

    .app-logo {
        width: 45px;
        height: 45px;
    }

    .app-title {
        font-size: 1.75rem;
    }

    .action-buttons {
        flex-direction: row;
        gap: var(--spacing-lg);
    }

    .btn-export-data,
    .btn-danger {
        min-width: 140px;
    }
}

/* Desktop (1024px+) */
@media (min-width: 1024px) {
    .settings-section {
        padding: 0 var(--spacing-xl);
    }

    .settings-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }

    .settings-header {
        margin-bottom: var(--spacing-2xl);
    }

    .settings-header h1 {
        font-size: 2.5rem;
    }

    .settings-subtitle {
        font-size: 1.25rem;
    }

    .card-header {
        padding: var(--spacing-xl) var(--spacing-lg);
    }

    .card-content {
        padding: var(--spacing-xl) var(--spacing-lg);
    }
}

/* Large Desktop (1440px+) */
@media (min-width: 1440px) {
    .settings-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }

    .settings-header h1 {
        font-size: 3rem;
    }

    .settings-subtitle {
        font-size: 1.375rem;
    }

    .card-header {
        padding: var(--spacing-2xl) var(--spacing-xl);
    }

    .card-header h3 {
        font-size: 1.5rem;
    }

    .card-content {
        padding: var(--spacing-2xl) var(--spacing-xl);
    }
}

/* Small Mobile (320px - 374px) - Stacked Layout */
@media (max-width: 479px) {
    .calendar-header {
        flex-direction: column;
        align-items: stretch;
        text-align: center;
        padding: var(--spacing-sm);
    }

    .calendar-header h2 {
        font-size: 1.5rem;
        margin-bottom: var(--spacing-sm);
    }

    .week-info {
        flex-direction: column;
        gap: var(--spacing-sm);
        align-items: center;
    }

    .week-nav {
        order: 2;
    }

    .header-right {
        order: 3;
        justify-content: center;
        margin-top: var(--spacing-sm);
    }

    .period-filter {
        padding: var(--spacing-sm);
        margin: 0 calc(-1 * var(--spacing-sm)) var(--spacing-lg);
        border-radius: 0;
        margin-left: 0;
        margin-right: 0;
    }

    .filter-tabs {
        gap: 0;
        justify-content: space-around;
    }

    .filter-tab {
        flex: 1;
        min-width: 0;
        padding: var(--spacing-sm) var(--spacing-xs);
        font-size: 0.8rem;
    }

    .filter-tab i {
        display: none;
    }

    .meal-count {
        position: absolute;
        top: -8px;
        right: -8px;
        font-size: 0.6rem;
        min-width: 16px;
        height: 16px;
        padding: 2px 4px;
    }

    .stats-bar {
        padding: var(--spacing-sm);
        gap: var(--spacing-md);
        margin: 0 calc(-1 * var(--spacing-sm)) var(--spacing-lg);
        border-radius: 0;
        margin-left: 0;
        margin-right: 0;
        justify-content: space-around;
    }

    .stat-item {
        flex: 1;
        text-align: center;
        min-width: 0;
    }

    .stat-label {
        display: block;
        font-size: 0.7rem;
    }

    .stat-value {
        display: block;
        font-size: 1.1rem;
        margin-top: var(--spacing-xs);
    }

    .calendar-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
        padding: 0 var(--spacing-sm);
    }

    .calendar-day {
        padding: var(--spacing-md);
        gap: var(--spacing-sm);
        margin-bottom: var(--spacing-md);
    }

    .day-header {
        font-size: 1rem;
        margin-bottom: var(--spacing-sm);
    }

    .period-slot {
        min-height: 75px;
        padding: var(--spacing-sm);
        margin-bottom: var(--spacing-sm);
    }

    .meal-card {
        padding: var(--spacing-sm);
        margin-bottom: var(--spacing-sm);
    }

    .meal-card {
        padding: var(--spacing-xs);
        margin-bottom: var(--spacing-xs);
    }

    .meal-type {
        font-size: 1rem;
    }

    .meal-info {
        font-size: 0.75rem;
    }

    .meal-portion {
        font-size: 0.75rem;
    }

    .app-title {
        font-size: 1.25rem;
    }
}


/* Mobile Large (480px - 639px) */
@media (min-width: 480px) and (max-width: 639px) {
    .calendar-grid {
        gap: var(--spacing-sm);
    }

    .calendar-day {
        padding: var(--spacing-sm);
    }

    .period-slot {
        min-height: 80px;
    }

    .calendar-header h2 {
        font-size: 1.75rem;
    }
}

/* Mobile XL / Small Tablet (640px - 767px) */
@media (min-width: 640px) and (max-width: 767px) {
    .calendar-grid {
        gap: var(--spacing-md);
    }

    .calendar-day {
        padding: var(--spacing-md);
    }

    .period-slot {
        min-height: 85px;
    }

    .calendar-header h2 {
        font-size: 1.75rem;
    }
}

/* Tablet (768px - 1023px) */
@media (min-width: 768px) {
    .main-content {
        padding: var(--spacing-xl) var(--spacing-lg);
    }

    .calendar-grid {
        gap: var(--spacing-lg);
    }

    .calendar-day {
        padding: var(--spacing-lg);
        gap: var(--spacing-lg);
    }

    .period-slot {
        min-height: 90px;
        padding: var(--spacing-lg);
    }

    .modal-content {
        max-width: 600px;
    }

    .app-title {
        font-size: 1.75rem;
    }

    .calendar-header h2 {
        font-size: 2rem;
    }
}

/* Desktop (1024px - 1279px) */
@media (min-width: 1024px) {
    .calendar-day {
        padding: var(--spacing-lg);
        gap: var(--spacing-lg);
    }

    .period-slot {
        min-height: 80px;
        padding: var(--spacing-lg);
    }

    .calendar-header h2 {
        font-size: 2.25rem;
    }

    .meal-card {
        padding: var(--spacing-md);
    }
}

/* Desktop Large (1280px - 1439px) */
@media (min-width: 1280px) {
    .calendar-day {
        padding: var(--spacing-xl);
        gap: var(--spacing-xl);
    }

    .period-slot {
        min-height: 90px;
        padding: var(--spacing-xl);
    }
}

/* Desktop XL (1440px+) */
@media (min-width: 1440px) {
    .main-content {
        max-width: 1400px;
        margin: 0 auto;
    }

    .calendar-day {
        padding: var(--spacing-2xl);
        gap: var(--spacing-2xl);
    }

    .period-slot {
        min-height: 100px;
        padding: var(--spacing-2xl);
    }

    .calendar-header h2 {
        font-size: 2.5rem;
    }
}

/* ===== PRINT STYLES ===== */
@media print {
    .btn-add-floating,
    .btn-export,
    .modal {
        display: none !important;
    }
    
    body {
        background: white;
        color: black;
    }
    
    .calendar-grid {
        break-inside: avoid;
    }
}

/* ===== DARK MODE (Automatic) ===== */
@media (prefers-color-scheme: light) {
    /* Already optimized for dark mode by default */
    /* Light mode would require significant color adjustments */
    /* Keeping dark theme as primary for Nike Training Club style */
}

/* ===== ANIMATIONS ===== */
@keyframes skeleton-loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.skeleton {
    background: linear-gradient(90deg, var(--color-bg-tertiary) 25%, var(--color-bg-secondary) 50%, var(--color-bg-tertiary) 75%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s infinite;
    border-radius: var(--radius-md);
}

/* ===== TOUCH OPTIMIZATIONS ===== */
@media (pointer: coarse) {
    .meal-card {
        min-height: 48px;
        padding: var(--spacing-md);
    }

    .btn-add-floating {
        width: 64px;
        height: 64px;
        font-size: 1.75rem;
    }

    .period-slot {
        min-height: 90px;
    }
}

/* ===== ORIENTATION SUPPORT ===== */
/* Landscape orientation adjustments */
@media (orientation: landscape) and (max-height: 500px) {
    .calendar-header {
        margin-bottom: var(--spacing-md);
    }

    .calendar-header h2 {
        font-size: 1.5rem;
    }

    .calendar-day {
        padding: var(--spacing-sm);
    }

    .period-slot {
        min-height: 60px;
        margin-bottom: var(--spacing-xs);
    }

    .btn-add-floating {
        width: 48px;
        height: 48px;
        font-size: 1.25rem;
    }
}

/* ===== KEYBOARD SHORTCUTS HELP ===== */
.shortcuts-help {
    background: var(--color-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-top: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    border: 2px solid var(--color-primary);
    animation: slideUp var(--transition-base);
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.shortcuts-help h3 {
    margin: 0 0 var(--spacing-md) 0;
    color: var(--color-primary);
    font-size: 1.125rem;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.shortcuts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
}

.shortcut-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-sm);
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-md);
}

.shortcut-item kbd {
    background: var(--color-bg-secondary);
    color: var(--color-text);
    padding: 4px var(--spacing-xs);
    border-radius: var(--radius-sm);
    font-family: monospace;
    font-size: 0.75rem;
    font-weight: var(--font-weight-bold);
    border: 1px solid var(--color-text-muted);
    min-width: 24px;
    text-align: center;
}

.shortcut-item span {
    color: var(--color-text-secondary);
    font-size: 0.875rem;
}

/* ===== UTILITY CLASSES ===== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }

.hidden { display: none !important; }
.visible { display: block !important; }