:root {
    --bg-main: #0B0C10;
    --bg-secondary: #1F2833;
    --primary: #66FCF1;
    --primary-dim: rgba(102, 252, 241, 0.2);
    --secondary: #45A29E;
    --text-main: #C5C6C7;
    --text-bright: #FFFFFF;
    --danger: #ff4b4b;
    --success: #00d289;
    --glass-bg: rgba(31, 40, 51, 0.6);
    --glass-border: rgba(197, 198, 199, 0.1);
    --shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
    --border-radius: 16px;
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

body {
    background-color: var(--bg-main);
    color: var(--text-main);
    line-height: 1.6;
    min-height: 100vh;
    background-image: 
        radial-gradient(circle at 15% 50%, rgba(69, 162, 158, 0.15), transparent 25%),
        radial-gradient(circle at 85% 30%, rgba(102, 252, 241, 0.1), transparent 25%);
    overflow-x: hidden;
}

h1, h2, h3, h4 {
    font-family: 'Outfit', sans-serif;
    color: var(--text-bright);
    font-weight: 600;
}

.app-container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

/* Header */
.glass-header {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius);
    padding: 2rem;
    margin-bottom: 3rem;
    box-shadow: var(--shadow);
    text-align: center;
    transform: translateY(-20px);
    animation: slideDown 0.6s ease forwards;
}

.logo-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 0.5rem;
}

.logo-icon {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: var(--bg-main);
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 15px var(--primary-dim);
}

.subtitle {
    color: var(--secondary);
    font-size: 1.1rem;
    letter-spacing: 0.5px;
}

/* Animations */
@keyframes slideDown {
    to { transform: translateY(0); opacity: 1; }
}

@keyframes slideIn {
    from { transform: translateY(30px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.slide-in {
    opacity: 0;
    animation: slideIn 0.6s ease forwards;
}

.delay-1 { animation-delay: 0.2s; }
.delay-2 { animation-delay: 0.4s; }
.delay-3 { animation-delay: 0.6s; }

/* Cards */
.card {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius);
    margin-bottom: 2rem;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.card:hover {
    border-color: rgba(102, 252, 241, 0.3);
    transform: translateY(-5px);
}

.card-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.5rem 2rem;
    background: rgba(0, 0, 0, 0.2);
    border-bottom: 1px solid var(--glass-border);
}

.step-badge {
    background: var(--primary);
    color: var(--bg-main);
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.2rem;
    font-family: 'Outfit', sans-serif;
}

.card-body {
    padding: 2rem;
}

/* Forms */
.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

label {
    font-size: 0.9rem;
    color: var(--text-bright);
    font-weight: 500;
}

input[type="text"], input[type="date"], input[type="number"] {
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    padding: 0.8rem 1rem;
    color: var(--text-bright);
    font-size: 1rem;
    transition: var(--transition);
    outline: none;
}

input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 2px var(--primary-dim);
}

/* Upload Area */
.upload-area {
    border: 2px dashed var(--secondary);
    border-radius: var(--border-radius);
    padding: 3rem 2rem;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    background: rgba(69, 162, 158, 0.05);
}

.upload-area:hover, .upload-area.dragover {
    background: rgba(102, 252, 241, 0.1);
    border-color: var(--primary);
}

.hidden-input {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
}

.upload-icon {
    width: 48px;
    height: 48px;
    color: var(--primary);
    margin-bottom: 1rem;
}

.upload-text {
    font-size: 1.2rem;
    color: var(--text-bright);
    margin-bottom: 0.5rem;
}

.upload-hint {
    font-size: 0.9rem;
    color: var(--secondary);
}

.file-info {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(0, 0, 0, 0.3);
    padding: 1rem 1.5rem;
    border-radius: 8px;
    margin-top: 1.5rem;
    border: 1px solid var(--primary-dim);
}

.file-details {
    display: flex;
    align-items: center;
    gap: 1rem;
    color: var(--primary);
    font-weight: 500;
}

.text-preview {
    margin-top: 2rem;
}

.preview-box {
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    padding: 1.5rem;
    max-height: 200px;
    overflow-y: auto;
    font-size: 0.9rem;
    color: #a0a0a0;
    white-space: pre-wrap;
    margin-top: 1rem;
}

/* Categories Grid */
.section-desc {
    margin-bottom: 1.5rem;
    color: var(--text-main);
}

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

.category-card {
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 1.5rem;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    position: relative;
    overflow: hidden;
}

.category-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: linear-gradient(135deg, var(--primary-dim), transparent);
    opacity: 0;
    transition: var(--transition);
}

.category-card:hover {
    transform: translateY(-3px);
    border-color: var(--secondary);
}

.category-card.selected {
    border-color: var(--primary);
    background: rgba(102, 252, 241, 0.05);
}

.category-card.selected::before {
    opacity: 1;
}

.cat-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    z-index: 1;
}

.cat-title {
    color: var(--text-bright);
    font-weight: 600;
    font-size: 1.1rem;
}

.cat-desc {
    font-size: 0.85rem;
    color: var(--secondary);
    position: relative;
    z-index: 1;
}

.cat-checkbox {
    width: 20px;
    height: 20px;
    border-radius: 4px;
    border: 2px solid var(--secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.category-card.selected .cat-checkbox {
    background: var(--primary);
    border-color: var(--primary);
}

.category-card.selected .cat-checkbox::after {
    content: '✓';
    color: var(--bg-main);
    font-weight: bold;
}

/* Buttons */
.action-bar {
    display: flex;
    justify-content: center;
    margin: 3rem 0;
}

.btn {
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    font-family: 'Outfit', sans-serif;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    justify-content: center;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    filter: grayscale(1);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: var(--bg-main);
    padding: 1rem 2rem;
    font-size: 1.1rem;
    box-shadow: 0 4px 15px var(--primary-dim);
}

.btn-primary:not(:disabled):hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 252, 241, 0.4);
}

.btn-secondary {
    background: transparent;
    border: 1px solid var(--danger);
    color: var(--danger);
}

.btn-secondary:hover {
    background: rgba(255, 75, 75, 0.1);
}

.btn-sm {
    padding: 0.4rem 0.8rem;
    font-size: 0.9rem;
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--primary);
    color: var(--primary);
    padding: 0.6rem 1.2rem;
}

.btn-outline:hover {
    background: var(--primary-dim);
}

/* Loader */
.loader-overlay {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(11, 12, 16, 0.85);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    transition: opacity 0.3s;
}

.loader-content {
    text-align: center;
    color: var(--primary);
}

.spinner {
    width: 60px;
    height: 60px;
    border: 4px solid var(--primary-dim);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 1.5rem;
}

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

.progress-bar {
    width: 300px;
    height: 6px;
    background: rgba(255,255,255,0.1);
    border-radius: 3px;
    margin-top: 1rem;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    width: 0%;
    background: var(--primary);
    transition: width 0.3s;
}

/* Report Section */
.report-section {
    animation: slideIn 0.8s ease forwards;
    margin-bottom: 4rem;
}

.report-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--glass-border);
}

.report-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.report-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 1.5rem;
}

.full-width {
    grid-column: 1 / -1;
}

.report-card h3 {
    color: var(--secondary);
    margin-bottom: 1rem;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

.stat-box {
    background: rgba(0,0,0,0.3);
    padding: 1rem;
    border-radius: 8px;
    text-align: center;
    border: 1px solid rgba(102, 252, 241, 0.1);
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary);
    font-family: 'Outfit', sans-serif;
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-main);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.observation-item {
    background: rgba(69, 162, 158, 0.1);
    border-left: 4px solid var(--primary);
    padding: 1rem;
    margin-bottom: 1rem;
    border-radius: 0 8px 8px 0;
}

.recommendation-item {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
    align-items: flex-start;
}

.rec-icon {
    color: var(--success);
    background: rgba(0, 210, 137, 0.1);
    padding: 0.5rem;
    border-radius: 50%;
}

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

/* Toast */
.toast {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background: var(--bg-secondary);
    color: var(--text-bright);
    padding: 1rem 1.5rem;
    border-radius: 8px;
    border-left: 4px solid var(--primary);
    box-shadow: var(--shadow);
    z-index: 2000;
    transition: all 0.3s;
    transform: translateX(0);
}

.toast.error {
    border-left-color: var(--danger);
}

.toast.hidden {
    transform: translateX(150%);
    opacity: 0;
}

footer {
    text-align: center;
    padding: 2rem 0;
    color: var(--secondary);
    font-size: 0.9rem;
    border-top: 1px solid var(--glass-border);
    margin-top: 2rem;
}

@media (max-width: 768px) {
    .report-grid {
        grid-template-columns: 1fr;
    }
}

/* Tabs */
.input-method-tabs {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    border-bottom: 1px solid var(--glass-border);
    padding-bottom: 1rem;
}

.tab-btn {
    background: transparent;
    border: none;
    color: var(--text-main);
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    transition: var(--transition);
}

.tab-btn:hover {
    color: var(--primary);
    background: rgba(102, 252, 241, 0.05);
}

.tab-btn.active {
    color: var(--primary);
    background: rgba(102, 252, 241, 0.1);
    border: 1px solid var(--primary-dim);
}

.tab-content {
    display: none;
    animation: slideIn 0.4s ease forwards;
}

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

/* Record Area */
.record-area {
    padding: 2rem;
    text-align: center;
    background: rgba(0,0,0,0.2);
    border-radius: var(--border-radius);
    border: 1px solid var(--glass-border);
}

.record-controls {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2rem;
}

.btn-large {
    padding: 1.2rem 2.5rem;
    font-size: 1.2rem;
}

.btn-danger {
    background: rgba(255, 75, 75, 0.1);
    border: 1px solid var(--danger);
    color: var(--danger);
}
.btn-danger:hover {
    background: var(--danger);
    color: white;
}

.recording-indicator {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    color: var(--primary);
    font-weight: 600;
}

.pulse-ring {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--danger);
    box-shadow: 0 0 0 0 rgba(255, 75, 75, 0.7);
    animation: pulsing 1.5s infinite;
}

@keyframes pulsing {
    0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(255, 75, 75, 0.7); }
    70% { transform: scale(1); box-shadow: 0 0 0 10px rgba(255, 75, 75, 0); }
    100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(255, 75, 75, 0); }
}

/* Engine Selection CSS */
.engine-tabs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-top: 1rem;
}

.engine-tab-btn {
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    cursor: pointer;
    text-align: left;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    outline: none;
}

.engine-tab-btn:hover {
    border-color: var(--secondary);
    background: rgba(102, 252, 241, 0.02);
}

.engine-tab-btn.active {
    border-color: var(--primary);
    background: rgba(102, 252, 241, 0.05);
    box-shadow: 0 0 15px rgba(102, 252, 241, 0.1);
}

.engine-title {
    font-family: 'Outfit', sans-serif;
    color: var(--text-bright);
    font-size: 1.2rem;
    font-weight: 600;
}

.engine-desc {
    font-size: 0.85rem;
    color: var(--text-main);
    line-height: 1.4;
}

.engine-tab-btn.active .engine-title {
    color: var(--primary);
}

.n8n-config {
    animation: fadeIn 0.4s ease forwards;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 768px) {
    .engine-tabs {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
}

/* App Navigation */
.app-navigation {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 2.5rem;
}

.nav-tab-btn {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-radius: 30px;
    padding: 0.8rem 1.8rem;
    font-family: 'Outfit', sans-serif;
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-main);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    box-shadow: var(--shadow);
}

.nav-tab-btn:hover {
    border-color: var(--secondary);
    color: var(--text-bright);
    transform: translateY(-2px);
}

.nav-tab-btn.active {
    background: rgba(102, 252, 241, 0.1);
    border-color: var(--primary);
    color: var(--primary);
    box-shadow: 0 0 15px rgba(102, 252, 241, 0.2);
}

/* Cohort Comparison inside Report */
.cohort-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--glass-border);
    padding-bottom: 1rem;
}

.classification-selector-container {
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.clinical-select, .db-select {
    background: var(--bg-main);
    border: 1px solid var(--glass-border);
    color: var(--text-bright);
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-size: 0.9rem;
    outline: none;
    cursor: pointer;
    transition: var(--transition);
}

.clinical-select:hover, .clinical-select:focus, .db-select:hover, .db-select:focus {
    border-color: var(--primary);
}

.cohort-comparison-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 2rem;
    align-items: center;
}

.chart-wrapper {
    background: rgba(0, 0, 0, 0.3);
    border-radius: 12px;
    padding: 1rem;
    border: 1px solid var(--glass-border);
    display: flex;
    justify-content: center;
    align-items: center;
}

#cohort-canvas {
    max-width: 100%;
    height: auto;
}

.cohort-stats-panel {
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
}

.cohort-stats-panel h4 {
    border-bottom: 1px solid var(--glass-border);
    padding-bottom: 0.5rem;
    margin-bottom: 0.5rem;
}

.stat-item {
    font-size: 0.95rem;
    color: var(--text-main);
    line-height: 1.5;
}

.stat-item strong {
    color: var(--text-bright);
}

.chart-legend {
    background: rgba(0, 0, 0, 0.2);
    border-radius: 8px;
    padding: 1rem;
    border: 1px solid var(--glass-border);
}

.chart-legend h5 {
    color: var(--text-bright);
    margin-bottom: 0.8rem;
    font-size: 0.9rem;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-size: 0.85rem;
    margin-bottom: 0.5rem;
    color: var(--text-main);
}

.legend-item:last-child {
    margin-bottom: 0;
}

.legend-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    display: inline-block;
}

.legend-dot.green { background-color: var(--success); }
.legend-dot.yellow { background-color: #f1c40f; }
.legend-dot.red { background-color: var(--danger); }
.legend-dot.current-star {
    color: #ffd700;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    width: auto;
    height: auto;
}

/* Database Cohort View */
.db-actions {
    display: flex;
    gap: 0.8rem;
    align-items: center;
}

.db-filters {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
    align-items: center;
}

.search-input {
    flex: 1;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--glass-border);
    color: var(--text-bright);
    padding: 0.6rem 1rem;
    border-radius: 8px;
    font-size: 0.95rem;
    outline: none;
    transition: var(--transition);
}

.search-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 10px rgba(102, 252, 241, 0.1);
}

.db-table-container {
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    overflow-x: auto;
    width: 100%;
}

.db-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 0.9rem;
}

.db-table th, .db-table td {
    padding: 1rem;
    border-bottom: 1px solid var(--glass-border);
    vertical-align: middle;
}

.db-table th {
    background: rgba(0, 0, 0, 0.4);
    color: var(--text-bright);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.5px;
}

.db-table tbody tr {
    transition: var(--transition);
}

.db-table tbody tr:hover {
    background: rgba(255, 255, 255, 0.02);
}

.db-table tbody tr:last-child td {
    border-bottom: none;
}

.badge-risk {
    padding: 0.25rem 0.6rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    display: inline-block;
    text-align: center;
}

.badge-risk.green {
    background-color: rgba(0, 210, 137, 0.15);
    color: var(--success);
    border: 1px solid rgba(0, 210, 137, 0.3);
}

.badge-risk.yellow {
    background-color: rgba(241, 196, 15, 0.15);
    color: #f1c40f;
    border: 1px solid rgba(241, 196, 15, 0.3);
}

.badge-risk.red {
    background-color: rgba(255, 75, 75, 0.15);
    color: var(--danger);
    border: 1px solid rgba(255, 75, 75, 0.3);
}

.db-empty {
    padding: 3rem;
    text-align: center;
    color: var(--secondary);
    font-size: 0.95rem;
}

@media (max-width: 900px) {
    .cohort-comparison-content {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
}