/* =========================================
   RiceMind Web UI - Eco-Futuristic Style
   ========================================= */

:root {
    /* Color Palette - Light Mode */
    --bg-dark: #F8FAFC;
    --bg-card: rgba(255, 255, 255, 0.85);
    --bg-card-hover: rgba(255, 255, 255, 1);
    
    --accent-green: #059669;
    --accent-green-glow: rgba(5, 150, 105, 0.2);
    --accent-cyan: #0891B2;
    --accent-cyan-glow: rgba(8, 145, 178, 0.2);
    
    --text-primary: #0F172A;
    --text-secondary: #475569;
    --text-muted: #64748B;
    
    --border-color: rgba(0, 0, 0, 0.1);
    
    /* Typography */
    --font-display: 'Outfit', sans-serif;
    --font-body: 'Plus Jakarta Sans', sans-serif;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-smooth: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

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

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    font-family: var(--font-body);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
    /* Subtle background mesh gradient effect */
    background-image: 
        radial-gradient(circle at 15% 50%, rgba(6, 182, 212, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 85% 30%, rgba(16, 185, 129, 0.08) 0%, transparent 50%);
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 600;
    line-height: 1.2;
}

a {
    color: var(--accent-cyan);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--accent-green);
}

/* =========================================
   Layout & Container
   ========================================= */
.app-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.content-wrapper {
    flex: 1;
    padding: 100px 5% 60px;
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
}

/* =========================================
   Navigation Bar
   ========================================= */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 70px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 5%;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
}

.brand-text {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-primary);
}

.brand-highlight {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 800;
    background: linear-gradient(90deg, var(--accent-green), var(--accent-cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

.nav-item {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
    padding: 0.5rem 0;
    position: relative;
}

.nav-item::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-cyan);
    transition: width var(--transition-fast);
}

.nav-item:hover::after {
    width: 100%;
}

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

.nav-divider {
    width: 1px;
    height: 20px;
    background-color: var(--border-color);
}

.nav-item.external {
    display: flex;
    align-items: center;
    gap: 0.3rem;
    color: var(--accent-green);
}

/* =========================================
   Hero Section (Home)
   ========================================= */
.hero-section {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    min-height: 70vh;
}

.hero-title {
    font-size: 4rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    letter-spacing: -0.02em;
}

.text-gradient {
    background: linear-gradient(135deg, var(--accent-green), var(--accent-cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    max-width: 600px;
}

.hero-actions {
    display: flex;
    gap: 1rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.875rem 1.75rem;
    border-radius: 8px;
    font-weight: 600;
    font-family: var(--font-body);
    cursor: pointer;
    transition: all var(--transition-fast);
    border: none;
    font-size: 1rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-green), var(--accent-cyan));
    color: var(--bg-dark);
    box-shadow: 0 4px 20px var(--accent-green-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px var(--accent-green-glow);
    color: var(--bg-dark);
}

.btn-secondary {
    background: rgba(0, 0, 0, 0.05);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: rgba(0, 0, 0, 0.1);
    transform: translateY(-2px);
    color: var(--text-primary);
}

.hero-graphics {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* =========================================
   Glass Cards & UI Elements
   ========================================= */
.glass-card {
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 2rem;
    transition: transform var(--transition-smooth), border-color var(--transition-fast);
}

.glass-card:hover {
    transform: translateY(-5px);
    border-color: rgba(6, 182, 212, 0.3);
}

.stat-card {
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 1.5rem 2rem;
}

.stat-value {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1;
    margin-bottom: 0.5rem;
}

.stat-label {
    color: var(--accent-cyan);
    font-weight: 500;
    font-size: 0.95rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* =========================================
   Features Grid
   ========================================= */
.features-section {
    margin-top: 5rem;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 3rem;
    text-align: center;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 2rem;
    transition: all var(--transition-smooth);
}

.feature-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--accent-green);
    transform: translateY(-5px);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* =========================================
   Dataset Doc View
   ========================================= */
.page-header {
    text-align: center;
    margin-bottom: 4rem;
}

.page-title {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.page-subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
}

.dataset-container {
    display: grid;
    grid-template-columns: 250px 1fr;
    gap: 4rem;
}

.doc-sidebar {
    position: sticky;
    top: 100px;
    height: fit-content;
}

.doc-nav {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    border-left: 2px solid var(--border-color);
    padding-left: 1rem;
}

.doc-link {
    color: var(--text-secondary);
    font-weight: 500;
    padding: 0.5rem 0;
}

.doc-link.active {
    color: var(--accent-green);
    font-weight: 600;
}

.doc-section {
    margin-bottom: 5rem;
}

.doc-section h2 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-color);
}

.glass-panel {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 2rem;
}

.doc-section p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

.highlighted-card {
    margin-bottom: 1.5rem;
}

/* Accordion */
.accordion {
    margin-top: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.accordion-item {
    border: 1px solid var(--border-color);
    border-radius: 12px;
    background: var(--bg-card);
    overflow: hidden;
}

.accordion-header {
    padding: 1.2rem 1.5rem;
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 1.1rem;
    background: rgba(0, 0, 0, 0.02);
}

.accordion-body {
    padding: 0 1.5rem 1.5rem;
    color: var(--text-secondary);
}

.accordion-body ul {
    padding-left: 1.5rem;
    margin-top: 0.5rem;
}

.accordion-body li {
    margin-bottom: 0.5rem;
}

.accordion-body code {
    background: rgba(16, 185, 129, 0.15);
    color: #047857;
    padding: 0.3rem 0.5rem;
    border-radius: 4px;
    font-family: monospace;
    font-size: 1.05em;
    font-weight: 600;
}

.info-box {
    display: flex;
    gap: 1rem;
    background: rgba(6, 182, 212, 0.1);
    border-left: 4px solid var(--accent-cyan);
    padding: 1.5rem;
    border-radius: 0 8px 8px 0;
    margin-top: 2rem;
}

/* =========================================
   Search Application View
   ========================================= */
.search-app-container {
    max-width: 1000px;
    margin: 0 auto;
}

.search-panel {
    margin-bottom: 3rem;
    box-shadow: 0 10px 40px rgba(0,0,0,0.2);
}

.search-heading {
    margin-bottom: 2rem;
    font-size: 1.8rem;
    color: var(--accent-green);
}

.search-type-selector {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.search-type-selector label {
    cursor: pointer;
}

.search-type-selector input[type="radio"] {
    display: none;
}

.radio-btn {
    display: inline-block;
    padding: 0.6rem 1.2rem;
    border-radius: 20px;
    background: rgba(0, 0, 0, 0.05);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    transition: all var(--transition-fast);
}

.search-type-selector input[type="radio"]:checked + .radio-btn {
    background: rgba(16, 185, 129, 0.15);
    border-color: var(--accent-green);
    color: var(--accent-green);
}

.search-inputs {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
}

.search-inputs > .input-group {
    flex: 1 1 calc(50% - 1rem);
    min-width: 250px;
}

.input-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.tech-input {
    width: 100%;
    padding: 1rem 1.2rem;
    background: rgba(255, 255, 255, 0.8);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 1rem;
    transition: all var(--transition-fast);
    outline: none;
}

.tech-input:focus {
    border-color: var(--accent-cyan);
    box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.1);
}

.submit-group {
    display: flex;
    align-items: flex-end;
    flex: 1 1 100% !important;
}

.btn-search {
    width: 100%;
    position: relative;
}

/* Tabs */
.search-tabs {
    display: flex;
    border-bottom: 2px solid var(--border-color);
    margin-bottom: 2rem;
    gap: 1rem;
    overflow-x: auto;
}

.tab-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1rem;
    font-family: var(--font-display);
    font-weight: 600;
    padding: 0.8rem 1.5rem;
    cursor: pointer;
    border-bottom: 3px solid transparent;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.tab-btn:hover {
    color: var(--text-primary);
}

.tab-btn.active {
    color: var(--accent-green);
    border-bottom-color: var(--accent-green);
}

/* Autocomplete */
.autocomplete-container {
    position: relative;
}

.autocomplete-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    border: 1px solid var(--accent-cyan);
    border-radius: 0 0 8px 8px;
    max-height: 250px;
    overflow-y: auto;
    z-index: 1000;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    display: none;
}

.autocomplete-item {
    padding: 0.8rem 1.2rem;
    cursor: pointer;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
    transition: background var(--transition-fast);
}

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

.autocomplete-item:hover {
    background: rgba(6, 182, 212, 0.1);
    color: var(--accent-cyan);
}

/* Results Area */
.empty-state {
    text-align: center;
    padding: 5rem 2rem;
    background: var(--bg-card);
    border: 1px dashed var(--border-color);
    border-radius: 16px;
    color: var(--text-muted);
}

.empty-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

/* Dynamic Result Cards (Generated by JS) */
.result-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    animation: fadeInUp 0.4s ease forwards;
}

.result-card h3 {
    color: var(--accent-cyan);
    margin-bottom: 0.5rem;
}

.badge {
    display: inline-block;
    padding: 0.2rem 0.6rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
    margin-right: 0.5rem;
    margin-bottom: 0.5rem;
}

.badge-green { background: rgba(16, 185, 129, 0.15); color: var(--accent-green); border: 1px solid var(--accent-green); }
.badge-cyan { background: rgba(8, 145, 178, 0.15); color: var(--accent-cyan); border: 1px solid var(--accent-cyan); }
.badge-gray { background: rgba(0, 0, 0, 0.05); color: var(--text-secondary); border: 1px solid var(--border-color); }

.detail-row {
    display: flex;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
}

.detail-label {
    min-width: 140px;
    color: var(--text-muted);
}

.detail-value {
    color: var(--text-primary);
}

.meta-box {
    background: rgba(0,0,0,0.03);
    padding: 1rem;
    border-radius: 8px;
    margin-top: 1rem;
    font-size: 0.85rem;
}

.sentence-text {
    font-style: italic;
    color: var(--text-secondary);
    border-left: 2px solid var(--accent-green);
    padding-left: 1rem;
    margin: 1rem 0;
}

.loader-spinner {
    border: 3px solid rgba(0,0,0,0.1);
    border-top: 3px solid var(--text-primary);
    border-radius: 50%;
    width: 20px;
    height: 20px;
    animation: spin 1s linear infinite;
    margin: 0 auto;
}

/* =========================================
   Footer
   ========================================= */
.footer {
    text-align: center;
    padding: 2rem;
    color: var(--text-muted);
    font-size: 0.9rem;
    border-top: 1px solid var(--border-color);
    margin-top: 4rem;
}

/* =========================================
   Animations
   ========================================= */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

.fade-in-up {
    opacity: 0;
    animation: fadeInUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

/* Responsive */
@media (max-width: 900px) {
    .hero-section {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }
    
    .hero-subtitle {
        margin: 0 auto 2rem;
    }
    
    .hero-actions {
        justify-content: center;
    }
    
    .dataset-container {
        grid-template-columns: 1fr;
    }
    
    .doc-sidebar {
        position: static;
        margin-bottom: 2rem;
    }
}