:root {
    --primary-color: #1DB584;
    --secondary-color: #0F8A5F;
    --accent-color: #FFD700;
    --text-primary: #2D3748;
    --text-secondary: #718096;
    --background: #F7FAFC;
    --card-background: #FFFFFF;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --border-radius: 12px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--background);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.app-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    position: relative;
}

/* Header Styles */
.header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 1rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow-lg);
    position: sticky;
    top: 0;
    z-index: 100;
}

.logo-container {
    display: flex;
    align-items: center;
    cursor: pointer;
    transition: var(--transition);
}

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

.logo-icon {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 0.75rem;
}

.finger-icon {
    font-size: 1.5rem;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.app-title {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 0.5px;
}

.location-info {
    font-size: 0.9rem;
    opacity: 0.9;
}

/* Main Content */
.main-content {
    flex: 1;
    padding-bottom: 80px;
    position: relative;
}

.screen {
    display: none;
    animation: fadeIn 0.3s ease-in-out;
}

.screen.active {
    display: block;
}

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

/* Screen Header */
.screen-header {
    display: flex;
    align-items: center;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid #E2E8F0;
    background: var(--card-background);
    position: sticky;
    top: 70px;
    z-index: 50;
}

.back-btn {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--primary-color);
    cursor: pointer;
    margin-right: 1rem;
    padding: 0.5rem;
    border-radius: 8px;
    transition: var(--transition);
}

.back-btn:hover {
    background: rgba(29, 181, 132, 0.1);
}

/* Home Styles */
.home-container {
    padding: 1.5rem;
}

.hero-section {
    margin-bottom: 2rem;
}

.hero-content {
    text-align: center;
    margin-bottom: 2rem;
}

.hero-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.hero-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
}

.quick-actions {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 2rem;
}

.quick-action-btn {
    padding: 1rem 1.5rem;
    border: none;
    border-radius: var(--border-radius);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    box-shadow: var(--shadow);
    font-size: 1rem;
}

.quick-action-btn.primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    font-size: 1.1rem;
    padding: 1.25rem;
}

.quick-action-btn.secondary {
    background: var(--card-background);
    color: var(--text-primary);
    border: 2px solid var(--primary-color);
}

.quick-action-btn.accent {
    background: var(--accent-color);
    color: var(--text-primary);
}

.quick-action-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.quick-action-btn:active {
    transform: scale(0.98);
}

.action-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

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

.quickbite-section {
    background: linear-gradient(135deg, rgba(29, 181, 132, 0.1), rgba(15, 138, 95, 0.1));
    padding: 1.5rem;
    border-radius: var(--border-radius);
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid rgba(29, 181, 132, 0.2);
}

.quickbite-section:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.quickbite-content h3 {
    color: var(--primary-color);
    font-size: 1.25rem;
    margin-bottom: 0.25rem;
}

.quickbite-content p {
    color: var(--text-secondary);
}

.quickbite-arrow {
    font-size: 1.5rem;
    color: var(--primary-color);
}

/* Categories */
.categories-section {
    margin-bottom: 2rem;
}

.section-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.meal-types {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    overflow-x: auto;
    padding-bottom: 0.5rem;
}

.meal-type-btn {
    padding: 0.75rem 1.25rem;
    border: 2px solid #E2E8F0;
    border-radius: 25px;
    background: var(--card-background);
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
}

.meal-type-btn.active,
.meal-type-btn:hover {
    border-color: var(--primary-color);
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

.meal-icon {
    font-size: 1.1rem;
}

.food-categories {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1rem;
}

.category-card {
    background: var(--card-background);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
}

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

.category-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.category-card h4 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.category-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Featured Restaurants */
.featured-section {
    margin-top: 2rem;
}

.restaurant-slider {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
}

.restaurant-card {
    background: var(--card-background);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    cursor: pointer;
    transition: var(--transition);
}

.restaurant-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.restaurant-image {
    width: 100%;
    height: 150px;
    object-fit: cover;
}

.restaurant-info {
    padding: 1rem;
}

.restaurant-info h4 {
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.restaurant-meta {
    display: flex;
    justify-content: space-between;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Menu Container */
.menu-container {
    padding: 1rem 1.5rem;
}

.menu-item {
    background: var(--card-background);
    border-radius: var(--border-radius);
    padding: 1rem;
    margin-bottom: 1rem;
    box-shadow: var(--shadow);
    display: flex;
    gap: 1rem;
    cursor: pointer;
    transition: var(--transition);
}

.menu-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.menu-item-image {
    width: 80px;
    height: 80px;
    border-radius: 8px;
    object-fit: cover;
}

.menu-item-info {
    flex: 1;
}

.menu-item-name {
    font-weight: 600;
    margin-bottom: 0.25rem;
    color: var(--text-primary);
}

.menu-item-description {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.menu-item-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.menu-item-price {
    font-weight: 600;
    color: var(--primary-color);
    font-size: 1.1rem;
}

.menu-item-time {
    font-size: 0.8rem;
    color: var(--text-secondary);
    background: rgba(29, 181, 132, 0.1);
    padding: 0.25rem 0.5rem;
    border-radius: 12px;
}

.quick-ready-badge {
    background: var(--accent-color);
    color: var(--text-primary);
    font-size: 0.7rem;
    padding: 0.25rem 0.5rem;
    border-radius: 12px;
    font-weight: 600;
}

/* Gift Styles */
.gift-container {
    padding: 1rem 1.5rem;
}

.gift-step {
    animation: slideIn 0.3s ease-out;
}

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

.contact-search {
    margin-bottom: 1rem;
}

.contact-search input {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid #E2E8F0;
    border-radius: var(--border-radius);
    font-size: 1rem;
}

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

.contact-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.contact-item {
    display: flex;
    align-items: center;
    padding: 1rem;
    background: var(--card-background);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    gap: 1rem;
}

.contact-item:hover {
    background: rgba(29, 181, 132, 0.1);
}

.contact-avatar {
    width: 40px;
    height: 40px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
}

.gift-options {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 2rem;
}

.gift-option-btn {
    padding: 1.5rem;
    border: 2px solid #E2E8F0;
    border-radius: var(--border-radius);
    background: var(--card-background);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.gift-option-btn:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
}

.gift-option-btn.accent {
    background: var(--accent-color);
}

.gift-icon {
    font-size: 2rem;
}

.money-amounts {
    text-align: center;
}

.amount-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin: 1rem 0;
}

.amount-btn {
    padding: 0.75rem 1.5rem;
    border: 2px solid var(--primary-color);
    border-radius: var(--border-radius);
    background: var(--card-background);
    color: var(--primary-color);
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
}

.amount-btn:hover,
.amount-btn.selected {
    background: var(--primary-color);
    color: white;
}

.confirm-gift-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 1rem 2rem;
    border-radius: var(--border-radius);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    margin-top: 1rem;
}

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

/* Confirmation Screen */
.confirmation-container {
    padding: 2rem 1.5rem;
    text-align: center;
}

.confirmation-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.confirmation-container h2 {
    font-size: 1.75rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.pickup-info {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.restaurant-name {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 2rem;
}

.qr-code-container {
    margin: 2rem 0;
}

.qr-code {
    width: 200px;
    height: 200px;
    background: var(--card-background);
    border: 2px solid #E2E8F0;
    border-radius: var(--border-radius);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    color: var(--text-secondary);
    box-shadow: var(--shadow);
}

.done-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 1rem 3rem;
    border-radius: var(--border-radius);
    font-weight: 600;
    font-size: 1.1rem;
    cursor: pointer;
    transition: var(--transition);
}

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

/* Bottom Navigation */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--card-background);
    display: flex;
    padding: 0.5rem;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
    z-index: 1000;
}

.nav-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 0.5rem;
    border: none;
    background: none;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    border-radius: 8px;
    font-size: 0.8rem;
}

.nav-item:hover,
.nav-item.active {
    color: var(--primary-color);
    background: rgba(29, 181, 132, 0.1);
}

.nav-icon {
    font-size: 1.25rem;
    margin-bottom: 0.25rem;
}

/* Loading Overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.9);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 4px solid #E2E8F0;
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 1rem;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Utility Classes */
.hidden {
    display: none !important;
}

.text-center {
    text-align: center;
}

.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }
.mb-1 { margin-bottom: 1rem; }
.mb-2 { margin-bottom: 2rem; }

/* Responsive Design */
@media (max-width: 768px) {
    .home-container {
        padding: 1rem;
    }
    
    .hero-title {
        font-size: 1.75rem;
    }
    
    .action-row {
        grid-template-columns: 1fr;
    }
    
    .food-categories {
        grid-template-columns: 1fr;
    }
    
    .restaurant-slider {
        grid-template-columns: 1fr;
    }
    
    .gift-options {
        grid-template-columns: 1fr;
    }
    
    .amount-buttons {
        flex-direction: column;
        align-items: center;
    }
}

@media (max-width: 480px) {
    .header {
        padding: 1rem;
    }
    
    .app-title {
        font-size: 1.25rem;
    }
    
    .hero-title {
        font-size: 1.5rem;
    }
    
    .meal-types {
        justify-content: center;
    }
    
    .quick-action-btn {
        font-size: 0.9rem;
    }
    
    .action-icon {
        font-size: 1.25rem;
    }
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}

/* Focus styles for accessibility */
button:focus,
input:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}