/* ==========================================
   FEASTFIT - SMART GROUP DINING PLATFORM
   Modern, Responsive Design with Animations
   ========================================== */

/* ==================== RESET & GLOBAL ==================== */

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

:root {
    /* Color Palette */
    --primary: #FF6B6B;
    --primary-dark: #E84545;
    --secondary: #4ECDC4;
    --secondary-dark: #3AAAA3;
    --accent: #FFE66D;
    --dark: #2C3E50;
    --dark-light: #34495E;
    --light: #ECF0F1;
    --white: #FFFFFF;
    --gray: #95A5A6;
    --gray-light: #BDC3C7;
    --success: #2ECC71;
    --warning: #F39C12;
    --danger: #E74C3C;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #FF6B6B 0%, #FFE66D 100%);
    --gradient-secondary: linear-gradient(135deg, #4ECDC4 0%, #556270 100%);
    --gradient-hero: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-card: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    
    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-xxl: 4rem;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.12);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.15);
    --shadow-xl: 0 16px 48px rgba(0,0,0,0.2);
    
    /* Transitions */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    height: 100%;
    width: 100%;
    font-family: 'Poppins', sans-serif;
    background: var(--light);
    color: var(--dark);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

/* ==================== NAVIGATION ==================== */
.navbar {
    background: var(--white);
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-md);
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-brand i {
    -webkit-text-fill-color: var(--primary);
}

.nav-links {
    display: flex;
    gap: var(--space-lg);
}

.nav-link {
    text-decoration: none;
    color: var(--dark);
    font-weight: 500;
    transition: var(--transition);
    position: relative;
    padding: var(--space-xs) 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 3px;
    background: var(--gradient-primary);
    transition: var(--transition);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--dark);
    cursor: pointer;
}

.mobile-menu {
    display: none;
    background: var(--white);
    box-shadow: var(--shadow-md);
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    padding: var(--space-md);
    z-index: 999;
    flex-direction: column;
    gap: var(--space-sm);
}

.mobile-menu.active {
    display: flex;
}

.mobile-link {
    text-decoration: none;
    color: var(--dark);
    font-weight: 500;
    padding: var(--space-sm);
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.mobile-link:hover {
    background: var(--light);
}

/* ==================== HERO SECTION ==================== */
.hero-section {
    background: var(--gradient-hero);
    padding: var(--space-xxl) 0;
    color: var(--white);
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    animation: float 20s infinite ease-in-out;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: var(--space-md);
}

.gradient-text {
    background: linear-gradient(135deg, #FFE66D 0%, #FF6B6B 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: var(--space-xl);
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
}

.hero-stats {
    display: flex;
    gap: var(--space-xl);
}

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

.stat-number {
    font-size: 2rem;
    font-weight: 700;
}

.stat-label {
    font-size: 0.9rem;
    opacity: 0.8;
}

.hero-image {
    position: relative;
    height: 500px;
}

.floating-card {
    position: absolute;
    background: var(--white);
    color: var(--dark);
    padding: var(--space-md);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-weight: 600;
    animation: float 6s infinite ease-in-out;
}

.floating-card i {
    font-size: 1.5rem;
}

.card-1 {
    top: 10%;
    left: 10%;
    animation-delay: 0s;
}

.card-2 {
    top: 30%;
    right: 10%;
    animation-delay: 1.5s;
}

.card-3 {
    bottom: 30%;
    left: 5%;
    animation-delay: 3s;
}

.card-4 {
    bottom: 10%;
    right: 15%;
    animation-delay: 4.5s;
}

@keyframes float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    25% { transform: translateY(-20px) rotate(2deg); }
    50% { transform: translateY(-10px) rotate(-2deg); }
    75% { transform: translateY(-15px) rotate(1deg); }
}

/* ==================== BUTTONS ==================== */
.btn {
    padding: var(--space-sm) var(--space-lg);
    border: none;
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: 1rem;
    text-decoration: none;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--white);
    box-shadow: var(--shadow-md);
}

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

.btn-secondary {
    background: var(--white);
    color: var(--primary);
    box-shadow: var(--shadow-md);
}

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

.btn-small {
    padding: var(--space-xs) var(--space-md);
    font-size: 0.9rem;
}

.btn-large {
    padding: var(--space-md) var(--space-xl);
    font-size: 1.1rem;
}

.btn-glow {
    animation: glow 2s infinite;
}

@keyframes glow {
    0%, 100% { box-shadow: 0 0 20px rgba(255, 107, 107, 0.5); }
    50% { box-shadow: 0 0 40px rgba(255, 107, 107, 0.8); }
}

/* ==================== SECTIONS ==================== */
section {
    padding: var(--space-xxl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-xl);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--space-sm);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--gray);
}

/* ==================== PREFERENCES FORM ==================== */
.preferences-form {
    background: var(--white);
    padding: var(--space-xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    max-width: 900px;
    margin: 0 auto;
}

.form-group {
    margin-bottom: var(--space-xl);
}

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: var(--space-sm);
    color: var(--dark);
    font-size: 1.1rem;
}

.label-hint {
    display: block;
    font-size: 0.9rem;
    color: var(--gray);
    font-weight: 400;
    margin-top: var(--space-xs);
}

input[type="text"],
textarea {
    width: 100%;
    padding: var(--space-md);
    border: 2px solid var(--light);
    border-radius: var(--radius-md);
    font-family: 'Poppins', sans-serif;
    font-size: 1rem;
    transition: var(--transition);
}

input[type="text"]:focus,
textarea:focus {
    outline: none;
    border-color: var(--primary);
}

/* Cuisine Sliders */
.cuisine-sliders {
    display: grid;
    gap: var(--space-md);
}

.slider-item {
    padding: var(--space-md);
    background: var(--light);
    border-radius: var(--radius-md);
}

.slider-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-sm);
    font-weight: 600;
}

.slider-value {
    background: var(--gradient-primary);
    color: var(--white);
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
}

.slider {
    width: 100%;
    height: 8px;
    border-radius: 5px;
    background: var(--white);
    outline: none;
    -webkit-appearance: none;
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--gradient-primary);
    cursor: pointer;
    box-shadow: var(--shadow-md);
}

.slider::-moz-range-thumb {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--gradient-primary);
    cursor: pointer;
    box-shadow: var(--shadow-md);
    border: none;
}

/* Hunger Options */
.hunger-options {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-md);
}

.radio-card {
    position: relative;
    cursor: pointer;
}

.radio-card input {
    position: absolute;
    opacity: 0;
}

.radio-content {
    background: var(--light);
    padding: var(--space-lg);
    border-radius: var(--radius-md);
    text-align: center;
    transition: var(--transition);
    border: 3px solid transparent;
}

.radio-content i {
    font-size: 2rem;
    margin-bottom: var(--space-sm);
    display: block;
}

.radio-content span {
    display: block;
    font-weight: 600;
    font-size: 1.1rem;
}

.radio-content small {
    color: var(--gray);
    font-size: 0.9rem;
}

.radio-card input:checked + .radio-content {
    background: var(--gradient-primary);
    color: var(--white);
    border-color: var(--primary);
    transform: scale(1.05);
}

.radio-card input:checked + .radio-content small {
    color: rgba(255, 255, 255, 0.9);
}

/* Drink Options */
.drink-options {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-md);
}

.checkbox-card {
    position: relative;
    cursor: pointer;
}

.checkbox-card input {
    position: absolute;
    opacity: 0;
}

.checkbox-content {
    background: var(--light);
    padding: var(--space-lg);
    border-radius: var(--radius-md);
    text-align: center;
    transition: var(--transition);
    border: 3px solid transparent;
}

.checkbox-content i {
    font-size: 2rem;
    margin-bottom: var(--space-sm);
    display: block;
}

.checkbox-content span {
    display: block;
    font-weight: 600;
}

.checkbox-card input:checked + .checkbox-content {
    background: var(--gradient-secondary);
    color: var(--white);
    border-color: var(--secondary);
}

.drink-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}

.drink-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.checkbox-card {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    background: #ffffff;
    border: 2px solid #ddd;
    border-radius: 12px;
    padding: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 2px 6px rgba(0,0,0,0.05);
    text-align: center;
}

.checkbox-card:hover {
    border-color: #4ecdc4;
    box-shadow: 0 4px 10px rgba(78,205,196,0.15);
}

.checkbox-content i {
    font-size: 1.8rem;
    color: #4ecdc4;
    margin-bottom: 0.5rem;
}

.checkbox-content span {
    font-size: 1rem;
    font-weight: 500;
    color: #333;
}

.checkbox-card input[type="checkbox"] {
    display: none;
}

.checkbox-card input[type="checkbox"]:checked + .checkbox-content {
    background: #4ecdc4;
    color: white;
    border-radius: 10px;
    padding: 0.5rem;
    transition: 0.3s;
}

.checkbox-card input[type="checkbox"]:checked + .checkbox-content i {
    color: white;
}

.drink-dropdown {
    display: none;
    width: 100%;
    animation: fadeIn 0.3s ease-in-out;
}

.drink-select {
    width: 100%;
    padding: 0.5rem;
    border-radius: 8px;
    border: 1.5px solid #ccc;
    background: white;
    font-family: 'Poppins', sans-serif;
    transition: border 0.2s ease;
}

.drink-select:focus {
    border-color: #4ecdc4;
    outline: none;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-5px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Dietary Tags */
.dietary-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.tag-checkbox {
    cursor: pointer;
}

.tag-checkbox input {
    display: none;
}

.tag {
    display: inline-block;
    padding: var(--space-sm) var(--space-md);
    background: var(--light);
    border-radius: var(--radius-lg);
    font-weight: 500;
    transition: var(--transition);
    border: 2px solid transparent;
}

.tag-checkbox input:checked + .tag {
    background: var(--gradient-primary);
    color: var(--white);
    border-color: var(--primary);
}

/* Spice Selector */
.spice-selector {
    display: flex;
    gap: var(--space-sm);
}

.spice-option {
    flex: 1;
    cursor: pointer;
}

.spice-option input {
    display: none;
}

.spice-label {
    display: block;
    padding: var(--space-md);
    background: var(--light);
    border-radius: var(--radius-md);
    text-align: center;
    font-weight: 600;
    transition: var(--transition);
    border: 2px solid transparent;
}

.spice-option input:checked + .spice-label {
    background: var(--gradient-primary);
    color: var(--white);
    border-color: var(--primary);
    transform: scale(1.05);
}

/* ==================== GROUP SECTION ==================== */
.group-section {
    background: var(--white);
}

.group-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
    margin-bottom: var(--space-xl);
}

.group-members,
.group-insights {
    background: var(--light);
    padding: var(--space-lg);
    border-radius: var(--radius-lg);
}

.members-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-md);
}

.members-header h3 {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.badge {
    background: var(--gradient-primary);
    color: var(--white);
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-lg);
    font-size: 0.9rem;
}

.members-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    max-height: 500px;
    overflow-y: auto;
}

.member-card {
    background: var(--white);
    padding: var(--space-md);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    display: flex;
    justify-content: space-between;
    align-items: center;
    animation: slideIn 0.3s ease-out;
}

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

.member-info h4 {
    margin-bottom: var(--space-xs);
}

.member-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
}

.member-tag {
    font-size: 0.8rem;
    padding: 0.25rem 0.5rem;
    background: var(--light);
    border-radius: var(--radius-sm);
}

.member-actions button {
    background: var(--danger);
    color: var(--white);
    border: none;
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
}

.member-actions button:hover {
    transform: scale(1.1);
}

.empty-state {
    text-align: center;
    padding: var(--space-xl);
    color: var(--gray);
}

.empty-state i {
    font-size: 3rem;
    margin-bottom: var(--space-md);
    opacity: 0.5;
}

.insight-card {
    background: var(--white);
    padding: var(--space-lg);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-md);
}

.insight-card h4 {
    margin-bottom: var(--space-md);
    color: var(--dark);
}

.chart-container {
    position: relative;
}

.dietary-summary {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.dietary-badge {
    padding: var(--space-sm) var(--space-md);
    background: var(--gradient-primary);
    color: var(--white);
    border-radius: var(--radius-lg);
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
}

.text-muted {
    color: var(--gray);
    font-style: italic;
}

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

/* ==================== RECOMMENDATIONS SECTION ==================== */
.recommendations-section {
    background: var(--light);
}

.recommendations-content {
    display: grid;
    gap: var(--space-xl);
}

.recommendation-card {
    background: var(--white);
    padding: var(--space-xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
}

.recommendation-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 5px;
    background: var(--gradient-primary);
}

.ai-message {
    background: var(--gradient-hero);
    color: var(--white);
    padding: var(--space-lg);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-lg);
    font-size: 1.1rem;
    line-height: 1.8;
}

.ai-message i {
    margin-right: var(--space-sm);
}

.restaurant-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.restaurant-item {
    background: var(--light);
    padding: var(--space-md);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.restaurant-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.restaurant-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: var(--space-sm);
}

.restaurant-name {
    font-weight: 600;
    font-size: 1.1rem;
    color: var(--dark);
}

.match-score {
    background: var(--gradient-primary);
    color: var(--white);
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-lg);
    font-weight: 600;
    font-size: 0.9rem;
}

.restaurant-details {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
    color: var(--gray);
    font-size: 0.9rem;
}

.portion-guide {
    background: var(--gradient-secondary);
    color: var(--white);
    padding: var(--space-lg);
    border-radius: var(--radius-md);
}

.portion-guide h4 {
    margin-bottom: var(--space-md);
}

.portion-items {
    display: grid;
    gap: var(--space-sm);
}

.portion-item {
    display: flex;
    justify-content: space-between;
    padding: var(--space-sm);
    background: rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-sm);
}

/* ==================== FOOTER ==================== */
.footer {
    background: var(--dark);
    color: var(--white);
    padding: var(--space-xl) 0 var(--space-md);
}

.footer-content {
    text-align: center;
    margin-bottom: var(--space-lg);
}

.footer-brand {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--space-sm);
}

.footer-text {
    margin-bottom: var(--space-md);
    opacity: 0.8;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: var(--space-md);
}

.footer-links a {
    color: var(--white);
    font-size: 1.5rem;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--accent);
    transform: scale(1.2);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--space-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    opacity: 0.7;
}

/* ==================== TOAST NOTIFICATION ==================== */
.toast {
    position: fixed;
    bottom: -100px;
    right: var(--space-lg);
    background: var(--success);
    color: var(--white);
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-xl);
    z-index: 9999;
    transition: var(--transition);
}

.toast.show {
    bottom: var(--space-lg);
}

.toast-content {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-weight: 500;
}

.toast-content i {
    font-size: 1.5rem;
}

/* ==================== RESPONSIVE DESIGN ==================== */
@media (max-width: 968px) {
    .nav-links {
        display: none;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
    }
    
    .hero-image {
        height: 300px;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .group-content {
        grid-template-columns: 1fr;
    }
    
    .hunger-options {
        grid-template-columns: 1fr;
    }
    
    .drink-options {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    :root {
        --space-xl: 2rem;
        --space-xxl: 3rem;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .hero-stats {
        justify-content: space-around;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .preferences-form {
        padding: var(--space-md);
    }
    
    .drink-options {
        grid-template-columns: 1fr;
    }
    
    .spice-selector {
        flex-direction: column;
    }
    
    .restaurant-grid {
        grid-template-columns: 1fr;
    }
}

/* ==================== 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(--space-sm); }
.mt-2 { margin-top: var(--space-md); }
.mt-3 { margin-top: var(--space-lg); }

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

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


html {
    scroll-behavior: smooth;
}

section {
    opacity: 0;
    transform: translateY(80px);
    transition: all 1s ease;
}

section.visible {
    opacity: 1;
    transform: translateY(0);
}