* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* Logo Header */
.logo-header {
    text-align: center;
    padding: 20px 0 10px;
    margin-bottom: 20px;
}

.logo-header a {
    display: inline-block;
    transition: transform var(--transition-base);
}

.logo-header a:hover {
    transform: scale(1.05);
}

.header-logo {
    height: 60px;
    width: auto;
    filter: drop-shadow(0 2px 8px rgba(0, 0, 0, 0.1));
}

body.dark-mode .header-logo {
    filter: drop-shadow(0 2px 8px rgba(255, 255, 255, 0.1));
}

:root {
    --primary-color: #10b981;
    --primary-dark: #059669;
    --primary-light: #34d399;
    --secondary-color: #3b82f6;
    --secondary-dark: #2563eb;
    --accent-color: #8b5cf6;
    --text-dark: #0f172a;
    --text-medium: #334155;
    --text-light: #64748b;
    --border-color: #e2e8f0;
    --bg-light: #f8fafc;
    --bg-gradient: linear-gradient(135deg, #f0fdf4 0%, #dbeafe 100%);
    --white: #ffffff;
    --white-transparent: rgba(255, 255, 255, 0.8);
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --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);
}

/* Dark Mode */
body.dark-mode {
    --primary-color: #10b981;
    --primary-dark: #34d399;
    --primary-light: #6ee7b7;
    --secondary-color: #60a5fa;
    --secondary-dark: #3b82f6;
    --accent-color: #a78bfa;
    --text-dark: #f1f5f9;
    --text-medium: #cbd5e1;
    --text-light: #94a3b8;
    --border-color: #334155;
    --bg-light: #0f172a;
    --bg-gradient: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    --white: #1e293b;
    --white-transparent: rgba(30, 41, 59, 0.8);
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.4);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.4), 0 10px 10px -5px rgba(0, 0, 0, 0.3);
    --shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.6);
}

body.dark-mode .diet-selector {
    color: var(--text-dark);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-weight: 400;
    line-height: 1.6;
    color: var(--text-dark);
    background: var(--bg-gradient);
    background-attachment: fixed;
    letter-spacing: -0.011em;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    font-feature-settings: 'cv02', 'cv03', 'cv04', 'cv11';
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

.title-section {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding: 35px 40px;
    background: var(--white-transparent);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: 20px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
    gap: 20px;
    position: relative;
    overflow: hidden;
}

.title-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.05) 0%, rgba(59, 130, 246, 0.05) 100%);
    z-index: -1;
}

h1 {
    font-family: 'Space Grotesk', 'Inter', sans-serif;
    font-size: 2.75rem;
    margin-bottom: 0;
    color: var(--text-dark);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.1;
}

header {
    background: var(--white-transparent);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 30px;
    border-radius: 20px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow);
    margin-bottom: 30px;
}

.btn-dark-mode {
    padding: 10px 16px;
    font-size: 1.2rem;
    background: var(--bg-light);
    border: 2px solid var(--border-color);
    min-width: 60px;
}

.btn-dark-mode:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
    transform: translateY(-2px);
}

body:not(.dark-mode) .btn-dark-mode .icon-dark {
    display: none;
}

body.dark-mode .btn-dark-mode .icon-light {
    display: none;
}

.controls {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.diet-selector {
    flex: 1;
    min-width: 200px;
    padding: 12px 16px;
    font-size: 0.95rem;
    font-weight: 500;
    border: 2px solid var(--border-color);
    border-radius: 10px;
    background: var(--white);
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-sm);
    font-family: 'Inter', sans-serif;
}

.diet-selector:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow);
}

.diet-selector:focus {
    outline: none;
    border-color: var(--primary-color);
}

.btn {
    padding: 12px 24px;
    font-size: 0.95rem;
    font-weight: 600;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    transition: all var(--transition-base);
    font-family: 'Inter', sans-serif;
    letter-spacing: -0.01em;
    box-shadow: var(--shadow-sm);
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-primary:active {
    transform: translateY(0);
    box-shadow: var(--shadow);
}

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

.btn-secondary:hover {
    background: var(--secondary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary:active {
    transform: translateY(0);
    box-shadow: var(--shadow);
}

.btn:disabled {
    background: var(--text-light);
    cursor: not-allowed;
    transform: none;
}

.btn-preferences {
    background: var(--accent-color);
    color: var(--white);
}

.btn-preferences:hover {
    background: #7c3aed;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-preferences:active {
    transform: translateY(0);
    box-shadow: var(--shadow);
}

.tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 30px;
    background: var(--white-transparent);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 10px;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow);
}

.tab-btn {
    flex: 1;
    padding: 15px 20px;
    font-size: 0.95rem;
    font-weight: 600;
    border: none;
    border-radius: 12px;
    background: transparent;
    color: var(--text-light);
    cursor: pointer;
    transition: all var(--transition-base);
    font-family: 'Inter', sans-serif;
    letter-spacing: -0.01em;
}

.tab-btn:hover {
    background: rgba(255, 255, 255, 0.5);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    color: var(--text-dark);
}

.tab-btn.active {
    background: var(--primary-color);
    color: white;
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

body.dark-mode .tab-btn:hover {
    background: rgba(255, 255, 255, 0.1);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding: 25px 30px;
    background: var(--white-transparent);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: 16px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow);
}

.section-header h2 {
    font-family: 'Space Grotesk', 'Inter', sans-serif;
    font-size: 1.85rem;
    color: var(--text-dark);
    font-weight: 600;
    letter-spacing: -0.025em;
}

/* Weekly Planner Grid */
.weekly-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

.day-card {
    background: var(--white-transparent);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: 16px;
    border: 1px solid var(--border-color);
    padding: 24px;
    box-shadow: var(--shadow);
    transition: all var(--transition-slow);
    position: relative;
    overflow: hidden;
}

.day-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--primary-light));
    opacity: 0;
    transition: opacity var(--transition-base);
}

.day-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

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

.day-header {
    font-family: 'Space Grotesk', 'Inter', sans-serif;
    font-size: 1.45rem;
    font-weight: 600;
    margin-bottom: 18px;
    padding-bottom: 12px;
    border-bottom: 3px solid var(--primary-color);
    color: var(--text-dark);
    letter-spacing: -0.025em;
}

.meal {
    margin-bottom: 16px;
    padding: 16px;
    background: rgba(255, 255, 255, 0.4);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.3);
    transition: all var(--transition-base);
    cursor: default;
}

.meal:hover {
    background: rgba(255, 255, 255, 0.6);
    transform: translateX(6px);
    box-shadow: var(--shadow-sm);
}

body.dark-mode .meal {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

body.dark-mode .meal:hover {
    background: rgba(255, 255, 255, 0.08);
}

.meal:last-child {
    margin-bottom: 0;
}

.meal-type {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--primary-color);
    margin-bottom: 8px;
    letter-spacing: 0.08em;
}

.meal-name {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 8px;
    letter-spacing: -0.01em;
}

.meal-ingredients {
    font-size: 0.875rem;
    color: var(--text-light);
    line-height: 1.6;
    font-weight: 400;
}

/* Grocery List */
.grocery-list {
    background: var(--white-transparent);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: 16px;
    border: 1px solid var(--border-color);
    padding: 30px;
    box-shadow: var(--shadow);
}

.grocery-category {
    margin-bottom: 30px;
}

.grocery-category:last-child {
    margin-bottom: 0;
}

.category-title {
    font-family: 'Space Grotesk', 'Inter', sans-serif;
    font-size: 1.35rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 15px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--border-color);
    letter-spacing: -0.02em;
}

.grocery-items {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 10px;
}

.grocery-item {
    padding: 14px 16px;
    background: var(--bg-light);
    border-radius: 10px;
    font-size: 0.95rem;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
    transition: all var(--transition-base);
    border: 1px solid transparent;
}

.grocery-item:hover {
    background: rgba(16, 185, 129, 0.1);
    transform: translateX(4px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-sm);
}

.grocery-item-name {
    font-weight: 600;
    color: var(--text-dark);
    display: flex;
    align-items: center;
    gap: 8px;
}

.grocery-item-name::before {
    content: '□';
    font-size: 1.2rem;
    color: var(--primary-color);
}

.grocery-item-total {
    font-size: 1rem;
    font-weight: 700;
    color: var(--primary-color);
    letter-spacing: -0.01em;
}

.grocery-item-servings {
    font-size: 0.85rem;
    color: var(--text-light);
    font-style: italic;
}

/* Mise en Place */
.mise-list {
    background: var(--white-transparent);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: 16px;
    border: 1px solid var(--border-color);
    padding: 30px;
    box-shadow: var(--shadow);
}

.prep-category {
    margin-bottom: 30px;
}

.prep-category:last-child {
    margin-bottom: 0;
}

.prep-title {
    font-family: 'Space Grotesk', 'Inter', sans-serif;
    font-size: 1.35rem;
    font-weight: 600;
    color: var(--secondary-color);
    margin-bottom: 15px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--border-color);
    letter-spacing: -0.02em;
}

.prep-items {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.prep-item {
    padding: 15px 20px;
    background: var(--bg-light);
    border-radius: 10px;
    border-left: 4px solid var(--secondary-color);
    transition: all var(--transition-base);
    border: 1px solid transparent;
    border-left: 4px solid var(--secondary-color);
}

.prep-item:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow-sm);
    border-color: var(--secondary-color);
    border-left-color: var(--secondary-color);
    background: rgba(59, 130, 246, 0.05);
}

.prep-item-title {
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 8px;
    font-size: 1.05rem;
}

.prep-item-desc {
    color: var(--text-light);
    font-size: 0.95rem;
    line-height: 1.6;
}

.prep-item-meals {
    margin-top: 8px;
    font-size: 0.85rem;
    color: var(--secondary-color);
    font-style: italic;
}

.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-light);
    font-size: 1.1rem;
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    animation: fadeIn 0.3s ease;
}

.modal.active {
    display: flex;
    justify-content: center;
    align-items: center;
}

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

.modal-content {
    background: var(--white);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: 20px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-xl);
    width: 90%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
    animation: slideUp 0.3s ease;
}

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

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 25px 30px;
    border-bottom: 2px solid var(--border-color);
}

.modal-header h2 {
    font-family: 'Space Grotesk', 'Inter', sans-serif;
    font-size: 1.85rem;
    color: var(--text-dark);
    margin: 0;
    font-weight: 600;
    letter-spacing: -0.025em;
}

.btn-close {
    background: none;
    border: none;
    font-size: 2rem;
    color: var(--text-light);
    cursor: pointer;
    padding: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    transition: all 0.3s;
}

.btn-close:hover {
    background: var(--bg-light);
    color: var(--text-dark);
}

.modal-body {
    padding: 30px;
}

.preference-section {
    margin-bottom: 30px;
}

.preference-section:last-child {
    margin-bottom: 0;
}

.preference-label {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 10px;
}

.label-icon {
    font-size: 1.5rem;
}

.label-text {
    flex: 1;
}

.preference-input {
    width: 100%;
    padding: 14px 16px;
    font-size: 0.95rem;
    font-weight: 500;
    border: 2px solid var(--border-color);
    border-radius: 10px;
    background: var(--bg-light);
    color: var(--text-dark);
    transition: all var(--transition-base);
    font-family: 'Inter', sans-serif;
    box-shadow: var(--shadow-sm);
}

.preference-input:hover {
    border-color: var(--primary-color);
}

.preference-input:focus {
    outline: none;
    border-color: var(--primary-color);
    background: var(--white);
    box-shadow: var(--shadow);
}

.preference-input::placeholder {
    color: var(--text-light);
}

.preference-hint {
    margin-top: 8px;
    font-size: 0.9rem;
    color: var(--text-light);
    font-style: italic;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 15px;
    padding: 25px 30px;
    border-top: 2px solid var(--border-color);
    background: var(--bg-light);
    border-radius: 0 0 16px 16px;
}

body.dark-mode .preference-input {
    background: var(--bg-light);
    color: var(--text-dark);
}

/* Responsive Design */
@media (max-width: 768px) {
    .title-section {
        flex-direction: row;
        align-items: center;
        padding: 25px 20px;
    }

    h1 {
        font-size: 1.8rem;
    }

    .btn-dark-mode {
        font-size: 1rem;
        padding: 8px 12px;
        min-width: 50px;
    }

    header {
        padding: 20px;
    }

    .controls {
        flex-direction: column;
    }

    .diet-selector {
        width: 100%;
    }

    .tabs {
        flex-direction: column;
    }

    .section-header {
        flex-direction: column;
        gap: 15px;
        align-items: stretch;
    }

    .weekly-grid {
        grid-template-columns: 1fr;
    }

    .grocery-items {
        grid-template-columns: 1fr;
    }
}

@media print {
    .tabs, .controls, .section-header button {
        display: none;
    }

    .tab-content {
        display: block;
    }
}