/* 
   NeuroCare AI Diet Planner CSS 
   Premium Dark Theme, Glassmorphism & Animations
*/

:root {
    --bg-dark: #0a0c10;
    --card-dark: rgba(20, 24, 32, 0.6);
    --card-border: rgba(255, 255, 255, 0.08);
    --text-main: #f0f3f8;
    --text-muted: #9aa2b1;
    
    --accent-indigo: #6366f1;
    --accent-purple: #a855f7;
    --accent-pink: #ec4899;
    --accent-cyan: #06b6d4;
    --accent-magenta: #d946ef;
    
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Plus Jakarta Sans', sans-serif;
}

body.dark-theme {
    margin: 0;
    padding: 0;
    font-family: var(--font-body);
    background-color: var(--bg-dark);
    color: var(--text-main);
    overflow-x: hidden;
    position: relative;
    min-height: 100vh;
}

/* Ambient Animated Bacgkround */
.ambient-bg {
    position: fixed;
    top: 0; left: 0; width: 100vw; height: 100vh;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
}

.blob {
    position: absolute;
    filter: blur(80px);
    border-radius: 50%;
    opacity: 0.4;
    animation: float 20s infinite ease-in-out alternate;
}

.blob-1 {
    width: 400px; height: 400px;
    background: radial-gradient(circle, var(--accent-indigo), transparent 70%);
    top: -10%; left: -10%;
}

.blob-2 {
    width: 500px; height: 500px;
    background: radial-gradient(circle, var(--accent-purple), transparent 70%);
    bottom: -20%; right: -10%;
    animation-delay: -5s;
}

.blob-3 {
    width: 300px; height: 300px;
    background: radial-gradient(circle, var(--accent-cyan), transparent 70%);
    top: 40%; left: 40%;
    animation-delay: -10s;
}

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

/* Utility Animations */
.fade-in-up { animation: fadeInUp 0.8s ease-out forwards; }
.slide-in-left { animation: slideInLeft 0.8s ease-out forwards; }
.slide-up-stagger { opacity: 0; transform: translateY(20px); animation: fadeInUp 0.6s ease-out forwards; }
.fade-in { opacity: 0; transition: opacity 0.6s ease; }
.visible { opacity: 1; }

@keyframes fadeInUp {
    to { opacity: 1; transform: translateY(0); }
}
@keyframes slideInLeft {
    from { opacity: 0; transform: translateX(-40px); }
    to { opacity: 1; transform: translateX(0); }
}

/* Typography & Layout */
h1, h2, h3, h4 { font-family: var(--font-heading); margin: 0; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 1rem; }
.mt-4 { margin-top: 2rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 1rem; }
.text-center { text-align: center; }
.w-full { width: 100%; }

.gradient-text {
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple), var(--accent-pink));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0; width: 100%;
    z-index: 100;
    border-bottom: 1px solid var(--card-border);
}
.glass-effect {
    background: rgba(10, 12, 16, 0.7);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}
.nav-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.logo { font-family: var(--font-heading); font-size: 1.5rem; font-weight: 700; display: flex; align-items: center; gap: 0.5rem;}
.nav-links { display: flex; gap: 2rem; }
.nav-item {
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
    display: flex; align-items: center; gap: 0.5rem;
}
.nav-item:hover, .nav-item.active { color: var(--text-main); }
.nav-item.active i { color: var(--accent-cyan); }

/* Main Container */
.container {
    max-width: 1200px;
    margin: 100px auto 40px;
    padding: 0 2rem;
}

.hero-section { margin-bottom: 3rem; }
.title { font-size: 3rem; font-weight: 700; margin-bottom: 1rem; letter-spacing: -1px; }
.subtitle { color: var(--text-muted); font-size: 1.2rem; max-width: 600px; margin: 0 auto; line-height: 1.6; }

/* Desktop Split Layout */
.diet-layout {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    align-items: flex-start;
}
@media (min-width: 900px) {
    .diet-layout { grid-template-columns: 350px 1fr; }
}

/* Glass Cards */
.glass-card, .glass-panel {
    background: var(--card-dark);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--card-border);
    border-radius: 20px;
    padding: 2rem;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.card-header { display: flex; align-items: center; gap: 0.75rem; margin-bottom: 2rem; }
.card-header i { font-size: 1.5rem; color: var(--accent-cyan); }
.card-header h2 { font-size: 1.5rem; }

/* Form Elements */
.diet-form .form-group { margin-bottom: 1.5rem; }
.diet-form label { display: block; font-weight: 500; color: var(--text-muted); margin-bottom: 0.5rem; display: flex; align-items: center; gap: 0.5rem;}
.premium-input {
    width: 100%;
    padding: 0.8rem 1rem;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    color: var(--text-main);
    font-family: inherit;
    font-size: 1rem;
    transition: all 0.3s ease;
    box-sizing: border-box;
}
.premium-input:focus { outline: none; border-color: var(--accent-indigo); box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2); }
.premium-input option { background: var(--bg-dark); color: var(--text-main); }

/* Custom Checkboxes */
.checkbox-grid { display: grid; grid-template-columns: 1fr; gap: 0.75rem; }
.custom-checkbox {
    display: flex; align-items: center; gap: 0.75rem;
    cursor: pointer; padding: 0.5rem 0;
}
.custom-checkbox input { display: none; }
.checkbox-box {
    width: 20px; height: 20px;
    border: 2px solid var(--text-muted);
    border-radius: 6px;
    position: relative;
    transition: all 0.2s ease;
}
.custom-checkbox input:checked + .checkbox-box {
    background: var(--accent-indigo);
    border-color: var(--accent-indigo);
}
.custom-checkbox input:checked + .checkbox-box::after {
    content: ''; position: absolute;
    width: 5px; height: 10px;
    border: solid white; border-width: 0 2px 2px 0;
    transform: rotate(45deg);
    top: 2px; left: 6px;
}

/* Beautiful Button */
.btn-primary {
    background: linear-gradient(135deg, var(--accent-indigo), var(--accent-purple));
    color: white; border: none;
    padding: 1rem 1.5rem; border-radius: 12px;
    font-size: 1.1rem; font-weight: 600; font-family: var(--font-heading);
    cursor: pointer; display: flex; justify-content: center; align-items: center; gap: 0.75rem;
    position: relative; overflow: hidden; transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(168, 85, 247, 0.4);
}
.btn-primary::after {
    content: ''; position: absolute;
    top: 0; left: -100%; width: 100%; height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s ease;
}
.btn-primary:hover::after { left: 100%; }

/* Results Panel Styling */
.results-header {
    margin-bottom: 2rem;
    display: flex; flex-direction: column; gap: 1rem;
}
.badges { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.badge {
    padding: 0.25rem 0.75rem; border-radius: 20px; font-size: 0.8rem; font-weight: 600;
    display: inline-flex; align-items: center; gap: 0.4rem;
}
.badge.info { background: rgba(6, 182, 212, 0.15); color: var(--accent-cyan); }
.badge.success { background: rgba(16, 185, 129, 0.15); color: var(--success); }
.badge.warning { background: rgba(245, 158, 11, 0.15); color: var(--warning); }

.section-title { font-size: 1.4rem; margin-bottom: 1rem; display: flex; align-items: center; gap: 0.5rem; }
.border-left-success { border-left: 4px solid var(--success); }
.border-left-danger { border-left: 4px solid var(--danger); }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.text-sm { font-size: 0.9rem; color: var(--text-muted); }

/* Meal Grid */
.meal-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}
.meal-card {
    padding: 1.5rem;
    text-align: center;
    border-top: 3px solid var(--accent-indigo);
    transition: transform 0.3s ease;
}
.meal-card:hover { transform: translateY(-5px); }
.meal-icon { font-size: 2rem; color: var(--accent-pink); }
.meal-card h4 { font-size: 1.2rem; margin-bottom: 0.5rem; }
.meal-card p { font-size: 0.95rem; color: var(--text-muted); line-height: 1.5; margin: 0;}

/* Food Lists */
.food-category h4 { color: var(--text-main); margin-bottom: 0.5rem; }
.food-category ul, .avoid-list ul {
    list-style: none; padding: 0; margin: 0;
}
.food-category li, .avoid-list li {
    padding: 0.5rem 0;
    border-bottom: 1px solid rgba(255,255,255,0.05);
}
.food-category li:last-child, .avoid-list li:last-child { border-bottom: none; }
.avoid-list li { position: relative; padding-left: 1.5rem; }
.avoid-list li::before {
    content: '\f071'; font-family: 'Font Awesome 6 Free'; font-weight: 900;
    position: absolute; left: 0; top: 0.6rem; color: var(--danger); font-size: 0.8rem;
}
.reason-text { margin-top: 0.2rem; line-height: 1.4; margin-bottom: 0px;}

/* Tracker Specifics */
.progress-bar-container { margin-bottom: 1rem; }
.progress-bar-container label { display: block; font-size: 0.9rem; margin-bottom: 0.4rem; font-weight: 500; }
.progress-bg {
    width: 100%; height: 8px;
    background: rgba(255,255,255,0.1);
    border-radius: 4px; overflow: hidden;
}
.progress-fill {
    height: 100%; border-radius: 4px;
    transition: width 1.5s cubic-bezier(0.4, 0, 0.2, 1);
}