/* ============================================
   Cooking AI - Modern CSS Styles
   ============================================ */

/* CSS Variables */
:root {
    --primary-color: #ff6b35;
    --primary-hover: #e55a2b;
    --primary-light: #fff4ed;
    --secondary-color: #2d3436;
    --accent-color: #00b894;
    --background-color: #f8f9fa;
    --surface-color: #ffffff;
    --text-primary: #2d3436;
    --text-secondary: #636e72;
    --text-muted: #b2bec3;
    --border-color: #e9ecef;
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --transition: all 0.3s ease;
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background-color: var(--background-color);
    color: var(--text-primary);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

a {
    text-decoration: none;
    color: inherit;
}

img {
    max-width: 100%;
    height: auto;
}

/* ============================================
   Buttons
   ============================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    font-size: 14px;
    font-weight: 600;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: var(--transition);
}

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

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

.btn-secondary {
    background-color: var(--surface-color);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background-color: var(--background-color);
    border-color: var(--text-muted);
}

.btn-sm {
    padding: 8px 16px;
    font-size: 13px;
}

.btn-lg {
    padding: 16px 32px;
    font-size: 16px;
}

.btn-block {
    width: 100%;
}

/* ============================================
   Header & Navigation
   ============================================ */

.header {
    background-color: var(--surface-color);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.logo {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-links a:not(.btn) {
    color: var(--text-secondary);
    font-weight: 500;
    transition: var(--transition);
}

.nav-links a:not(.btn):hover {
    color: var(--primary-color);
}

/* ============================================
   Hero Section
   ============================================ */

.hero {
    padding: 80px 0;
    background: linear-gradient(135deg, #fff9f5 0%, #fff 100%);
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-content h1 {
    font-size: 48px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 24px;
}

.highlight {
    color: var(--primary-color);
}

.hero-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 32px;
    max-width: 500px;
}

.hero-cta {
    display: flex;
    gap: 16px;
    margin-bottom: 48px;
}

.hero-stats {
    display: flex;
    gap: 48px;
}

.stat {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-size: 32px;
    font-weight: 700;
    color: var(--primary-color);
}

.stat-label {
    font-size: 14px;
    color: var(--text-secondary);
}

.hero-image {
    display: flex;
    justify-content: center;
}

.mock-app {
    background: var(--surface-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    width: 360px;
    overflow: hidden;
}

.mock-header {
    background: var(--background-color);
    padding: 12px;
    display: flex;
    gap: 8px;
}

.mock-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--border-color);
}

.mock-content {
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.mock-card {
    background: var(--primary-light);
    padding: 16px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    gap: 12px;
    animation: slideIn 0.5s ease forwards;
    opacity: 0;
}

.mock-card:nth-child(1) { animation-delay: 0.1s; }
.mock-card:nth-child(2) { animation-delay: 0.2s; }
.mock-card:nth-child(3) { animation-delay: 0.3s; }

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

.mock-emoji {
    font-size: 32px;
}

.mock-title {
    flex: 1;
    font-weight: 600;
    font-size: 14px;
}

.mock-time {
    font-size: 12px;
    color: var(--text-secondary);
}

/* ============================================
   Features Section
   ============================================ */

.features {
    padding: 100px 0;
}

.section-title {
    font-size: 36px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 12px;
}

.section-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: 60px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.feature-card {
    background: var(--surface-color);
    padding: 32px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    text-align: center;
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 20px;
    margin-bottom: 12px;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 15px;
}

/* ============================================
   How It Works Section
   ============================================ */

.how-it-works {
    padding: 100px 0;
    background-color: var(--surface-color);
}

.steps {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    gap: 40px;
}

.step {
    flex: 1;
    max-width: 280px;
    text-align: center;
}

.step-number {
    width: 60px;
    height: 60px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: 700;
    margin: 0 auto 20px;
}

.step h3 {
    font-size: 20px;
    margin-bottom: 12px;
}

.step p {
    color: var(--text-secondary);
    font-size: 15px;
}

.step-connector {
    width: 80px;
    height: 2px;
    background: var(--border-color);
    margin-top: 30px;
}

/* ============================================
   CTA Section
   ============================================ */

.cta-section {
    padding: 100px 0;
    background: var(--primary-color);
    color: white;
    text-align: center;
}

.cta-section h2 {
    font-size: 36px;
    margin-bottom: 16px;
}

.cta-section p {
    font-size: 18px;
    opacity: 0.9;
    margin-bottom: 32px;
}

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

.cta-section .btn-primary:hover {
    background: var(--primary-light);
}

/* ============================================
   Footer
   ============================================ */

.footer {
    background: var(--secondary-color);
    color: white;
    padding: 60px 0 30px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 40px;
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.7);
    margin-top: 12px;
}

.footer-links {
    display: flex;
    gap: 32px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    transition: var(--transition);
}

.footer-links a:hover {
    color: white;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 30px;
    text-align: center;
    color: rgba(255, 255, 255, 0.5);
    font-size: 14px;
}

/* ============================================
   Dashboard Layout
   ============================================ */

.dashboard-body {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: 260px;
    background: var(--surface-color);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    z-index: 50;
}

.sidebar-header {
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
}

.sidebar-nav {
    flex: 1;
    padding: 20px 12px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 16px;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-weight: 500;
    transition: var(--transition);
    margin-bottom: 4px;
}

.nav-item:hover {
    background: var(--background-color);
    color: var(--text-primary);
}

.nav-item.active {
    background: var(--primary-light);
    color: var(--primary-color);
}

.nav-icon {
    font-size: 20px;
}

.sidebar-footer {
    padding: 20px;
    border-top: 1px solid var(--border-color);
}

.user-info {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.user-avatar {
    font-size: 32px;
}

.user-details {
    display: flex;
    flex-direction: column;
}

.user-name {
    font-weight: 600;
    font-size: 14px;
}

.user-status {
    font-size: 12px;
    color: var(--text-muted);
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: 260px;
    padding: 32px;
}

.mobile-header {
    display: none;
    padding: 16px 20px;
    background: var(--surface-color);
    border-bottom: 1px solid var(--border-color);
    align-items: center;
    gap: 16px;
}

.menu-toggle {
    font-size: 24px;
    background: none;
    border: none;
    cursor: pointer;
}

.content-section {
    display: none;
}

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

.section-header {
    margin-bottom: 32px;
}

.section-header h1 {
    font-size: 28px;
    margin-bottom: 8px;
}

.section-header p {
    color: var(--text-secondary);
}

/* Search & Filters */
.search-container {
    display: flex;
    gap: 12px;
    margin-bottom: 24px;
}

.search-input {
    flex: 1;
    padding: 14px 20px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 15px;
    transition: var(--transition);
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.filters {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 32px;
    padding: 20px;
    background: var(--surface-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.filter-group label {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
}

.filter-select {
    padding: 10px 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 14px;
    background: white;
    min-width: 140px;
    cursor: pointer;
}

.filter-select:focus {
    outline: none;
    border-color: var(--primary-color);
}

/* Recipe Grid */
.recipe-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

.recipe-card {
    background: var(--surface-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    cursor: pointer;
}

.recipe-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.recipe-image {
    height: 180px;
    background: var(--primary-light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 64px;
}

.recipe-info {
    padding: 20px;
}

.recipe-info h3 {
    font-size: 18px;
    margin-bottom: 8px;
}

.recipe-meta {
    display: flex;
    gap: 16px;
    color: var(--text-secondary);
    font-size: 13px;
    margin-bottom: 12px;
}

.recipe-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.recipe-tag {
    padding: 4px 10px;
    background: var(--background-color);
    border-radius: 20px;
    font-size: 12px;
    color: var(--text-secondary);
}

/* Meal Planner */
.week-selector {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 24px;
}

.week-label {
    font-weight: 600;
}

.planner-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 12px;
}

.planner-day {
    background: var(--surface-color);
    border-radius: var(--radius-md);
    min-height: 300px;
    padding: 12px;
    box-shadow: var(--shadow-sm);
}

.day-header {
    font-weight: 600;
    text-align: center;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 12px;
}

.day-meals {
    min-height: 200px;
}

.planner-meal {
    background: var(--primary-light);
    padding: 10px;
    border-radius: var(--radius-sm);
    margin-bottom: 8px;
    font-size: 13px;
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: move;
}

.planner-meal .meal-emoji {
    font-size: 20px;
}

.add-meal-btn {
    width: 100%;
    padding: 10px;
    background: none;
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    cursor: pointer;
    transition: var(--transition);
}

.add-meal-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

/* Shopping List */
.shopping-actions {
    display: flex;
    gap: 12px;
    margin-bottom: 24px;
}

.shopping-list {
    background: var(--surface-color);
    border-radius: var(--radius-md);
    padding: 24px;
    box-shadow: var(--shadow-sm);
}

.shopping-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 0;
    border-bottom: 1px solid var(--border-color);
}

.shopping-item:last-child {
    border-bottom: none;
}

.shopping-item input[type="checkbox"] {
    width: 20px;
    height: 20px;
    accent-color: var(--primary-color);
}

.shopping-item.checked span {
    text-decoration: line-through;
    color: var(--text-muted);
}

.empty-state {
    text-align: center;
    color: var(--text-muted);
    padding: 40px;
}

/* Settings */
.settings-container {
    display: grid;
    gap: 24px;
    max-width: 600px;
}

.settings-card {
    background: var(--surface-color);
    border-radius: var(--radius-md);
    padding: 24px;
    box-shadow: var(--shadow-sm);
}

.settings-card h2 {
    font-size: 18px;
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-color);
}

.settings-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group label {
    font-size: 14px;
    font-weight: 500;
}

.form-input {
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 14px;
    transition: var(--transition);
}

.form-input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--primary-color);
}

.number-input {
    display: flex;
    align-items: center;
    gap: 8px;
}

.number-input input {
    width: 60px;
    text-align: center;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 16px;
}

.number-btn {
    width: 40px;
    height: 40px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--background-color);
    font-size: 18px;
    cursor: pointer;
    transition: var(--transition);
}

.number-btn:hover {
    background: var(--primary-light);
    border-color: var(--primary-color);
}

/* ============================================
   Modals
   ============================================ */

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 200;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--surface-color);
    border-radius: var(--radius-lg);
    padding: 32px;
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
}

.modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    font-size: 24px;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-muted);
}

/* Onboarding Modal */
.onboarding-modal {
    text-align: center;
    max-width: 600px;
}

.onboarding-progress {
    margin-bottom: 32px;
}

.progress-bar {
    height: 6px;
    background: var(--background-color);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 8px;
}

.progress-fill {
    height: 100%;
    background: var(--primary-color);
    width: 25%;
    transition: width 0.3s ease;
}

.progress-text {
    font-size: 13px;
    color: var(--text-muted);
}

.onboarding-step {
    display: none;
}

.onboarding-step.active {
    display: block;
}

.onboarding-step h2 {
    font-size: 28px;
    margin-bottom: 12px;
}

.onboarding-step > p {
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.onboarding-icon {
    font-size: 80px;
    margin-bottom: 24px;
}

.family-size-selector {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-bottom: 32px;
}

.number-input.large {
    transform: scale(1.5);
}

.people-label {
    font-size: 18px;
    color: var(--text-secondary);
}

.onboarding-nav {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-top: 32px;
}

.allergen-grid, .appliance-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    margin-bottom: 24px;
}

.allergen-chip, .appliance-chip {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px;
    background: var(--background-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
}

.allergen-chip:hover, .appliance-chip:hover {
    background: var(--primary-light);
}

.allergen-chip input, .appliance-chip input {
    accent-color: var(--primary-color);
}

.auth-link {
    margin-top: 16px;
    text-align: center;
    color: var(--text-secondary);
}

.auth-link a {
    color: var(--primary-color);
    font-weight: 500;
}

/* ============================================
   Toast Notification
   ============================================ */

.toast {
    position: fixed;
    bottom: 24px;
    right: 24px;
    background: var(--secondary-color);
    color: white;
    padding: 16px 24px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    transform: translateY(100px);
    opacity: 0;
    transition: var(--transition);
    z-index: 300;
}

.toast.active {
    transform: translateY(0);
    opacity: 1;
}

/* ============================================
   Responsive Design
   ============================================ */

@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .planner-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .planner-day:nth-child(n+5) {
        display: none;
    }
}

@media (max-width: 768px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-content h1 {
        font-size: 36px;
    }
    
    .hero-subtitle {
        max-width: none;
    }
    
    .hero-cta {
        justify-content: center;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .hero-image {
        display: none;
    }
    
    .nav-links {
        display: none;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .steps {
        flex-direction: column;
        align-items: center;
    }
    
    .step-connector {
        width: 2px;
        height: 40px;
        margin: 0;
    }
    
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s ease;
    }
    
    .sidebar.active {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .mobile-header {
        display: flex;
    }
    
    .filters {
        flex-direction: column;
    }
    
    .filter-select {
        width: 100%;
    }
    
    .recipe-grid {
        grid-template-columns: 1fr;
    }
    
    .settings-container {
        max-width: none;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 24px;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 60px 0;
    }
    
    .hero-content h1 {
        font-size: 28px;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 16px;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .cta-section h2 {
        font-size: 28px;
    }
    
    .allergen-grid, .appliance-grid {
        grid-template-columns: 1fr;
    }
}