/* =========================================================
   X-Ray AI Radiolog — Design System
   Professional Medical SaaS Dark Theme
   ========================================================= */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* === CSS Variables === */
:root {
    /* Background */
    --bg-primary: #0F1419;
    --bg-secondary: #1A2332;
    --bg-tertiary: #243044;
    --bg-hover: #2A3A52;

    /* Primary */
    --primary: #00BFA6;
    --primary-hover: #00D9BC;
    --primary-light: rgba(0, 191, 166, 0.15);
    --primary-glow: rgba(0, 191, 166, 0.3);

    /* Accent */
    --accent: #3B82F6;
    --accent-hover: #60A5FA;
    --accent-light: rgba(59, 130, 246, 0.15);

    /* Status */
    --success: #10B981;
    --warning: #F59E0B;
    --danger: #EF4444;
    --info: #06B6D4;

    /* Severity */
    --critical: #DC2626;
    --high-risk: #F97316;
    --medium-risk: #EAB308;
    --low-risk: #22C55E;
    --normal: #94A3B8;

    /* Coin */
    --coin: #F59E0B;
    --coin-bg: rgba(245, 158, 11, 0.15);

    /* Text */
    --text-primary: #F1F5F9;
    --text-secondary: #94A3B8;
    --text-muted: #64748B;

    /* Border */
    --border: rgba(148, 163, 184, 0.12);
    --border-focus: rgba(0, 191, 166, 0.5);

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.5);
    --shadow-glow: 0 0 20px rgba(0, 191, 166, 0.2);

    /* Layout */
    --sidebar-width: 260px;
    --topbar-height: 64px;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 20px;
}

/* === Reset === */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

a {
    color: var(--primary);
    text-decoration: none;
    transition: color 0.2s;
}
a:hover { color: var(--primary-hover); }

/* === Typography === */
h1 { font-size: 2rem; font-weight: 700; letter-spacing: -0.02em; }
h2 { font-size: 1.5rem; font-weight: 700; letter-spacing: -0.01em; }
h3 { font-size: 1.25rem; font-weight: 600; }
h4 { font-size: 1.1rem; font-weight: 600; }

/* === Utility Classes === */
.gradient-text {
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Responsive Grids (from 2/3 cols to 1 col) */
.responsive-grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}
.responsive-grid-3 {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 1rem;
}

.card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    transition: all 0.3s ease;
}
.card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-glow);
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
}
.badge-primary { background: var(--primary-light); color: var(--primary); }
.badge-accent { background: var(--accent-light); color: var(--accent); }
.badge-coin {
    background: var(--coin-bg);
    color: var(--coin);
    font-weight: 700;
}
.badge-success { background: rgba(16,185,129,0.15); color: var(--success); }
.badge-warning { background: rgba(245,158,11,0.15); color: var(--warning); }
.badge-danger { background: rgba(239,68,68,0.15); color: var(--danger); }

/* === Buttons === */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn-primary {
    background: linear-gradient(135deg, var(--primary), #00D9BC);
    color: #0F1419;
    box-shadow: 0 4px 16px var(--primary-glow);
}
.btn-primary:hover {
    box-shadow: 0 6px 24px rgba(0, 191, 166, 0.4);
    color: #0F1419;
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border);
}
.btn-secondary:hover {
    background: var(--bg-hover);
    border-color: var(--primary);
    color: var(--text-primary);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--primary);
    color: var(--primary);
}
.btn-outline:hover {
    background: var(--primary);
    color: #0F1419;
}

.btn-danger {
    background: linear-gradient(135deg, #DC2626, #EF4444);
    color: white;
}

.btn-coin {
    background: linear-gradient(135deg, #F59E0B, #D97706);
    color: #0F1419;
}

.btn-sm { padding: 6px 14px; font-size: 0.8rem; }
.btn-lg { padding: 14px 28px; font-size: 1rem; }
.btn-block { width: 100%; }

/* === Form Inputs === */
.form-group {
    margin-bottom: 1.25rem;
}
.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 6px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.form-input, .form-textarea, .form-select {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 0.95rem;
    font-family: inherit;
    transition: all 0.2s;
}
.form-input:focus, .form-textarea:focus, .form-select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}
.form-input::placeholder {
    color: var(--text-muted);
}
.form-textarea {
    resize: vertical;
    min-height: 100px;
}
.form-select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2394A3B8' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
}

/* Error */
.form-error {
    color: var(--danger);
    font-size: 0.8rem;
    margin-top: 4px;
}
.errorlist {
    list-style: none;
    padding: 0;
    margin: 4px 0 0 0;
}
.errorlist li {
    color: var(--danger);
    font-size: 0.8rem;
}

/* === Alerts / Messages === */
.alert {
    padding: 12px 18px;
    border-radius: var(--radius-md);
    margin-bottom: 1rem;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 10px;
    animation: slideDown 0.3s ease;
}
.alert-success { background: rgba(16,185,129,0.12); border-left: 4px solid var(--success); color: var(--success); }
.alert-error { background: rgba(239,68,68,0.12); border-left: 4px solid var(--danger); color: var(--danger); }
.alert-warning { background: rgba(245,158,11,0.12); border-left: 4px solid var(--warning); color: var(--warning); }
.alert-info { background: rgba(6,182,212,0.12); border-left: 4px solid var(--info); color: var(--info); }

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

/* === Stat Cards === */
.stat-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: all 0.3s;
}
.stat-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-glow);
    transform: translateY(-2px);
}
.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    flex-shrink: 0;
}
.stat-value {
    font-size: 1.75rem;
    font-weight: 800;
    line-height: 1;
    letter-spacing: -0.02em;
}
.stat-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 2px;
}

/* === Tables === */
.table-container {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    max-width: 100%;
}
table {
    width: 100%;
    min-width: 600px; /* Force minimum width to prevent crushing */
    border-collapse: collapse;
}
thead th {
    background: var(--bg-tertiary);
    padding: 12px 16px;
    text-align: left;
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border);
}
tbody td {
    padding: 14px 16px;
    border-bottom: 1px solid var(--border);
    font-size: 0.9rem;
}
tbody tr:hover {
    background: var(--bg-tertiary);
}
tbody tr:last-child td {
    border-bottom: none;
}

/* === Pagination === */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-top: 2rem;
}
.pagination a, .pagination span {
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 500;
}
.pagination a {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    color: var(--text-primary);
}
.pagination a:hover {
    background: var(--primary);
    color: #0F1419;
    border-color: var(--primary);
}
.pagination .current {
    background: var(--primary);
    color: #0F1419;
    font-weight: 700;
}

/* === Probability Bars === */
.probability-bar {
    height: 8px;
    background: var(--bg-tertiary);
    border-radius: 4px;
    overflow: hidden;
    margin-top: 4px;
}
.probability-fill {
    height: 100%;
    border-radius: 4px;
    transition: width 1s ease;
    background: linear-gradient(90deg, var(--primary), var(--accent));
}
.probability-fill.high { background: linear-gradient(90deg, var(--danger), #F97316); }
.probability-fill.medium { background: linear-gradient(90deg, var(--warning), #FBBF24); }
.probability-fill.low { background: linear-gradient(90deg, var(--success), #34D399); }

/* === Severity Badges === */
.severity-critical { background: rgba(220,38,38,0.15); color: var(--critical); }
.severity-high { background: rgba(249,115,22,0.15); color: var(--high-risk); }
.severity-medium { background: rgba(234,179,8,0.15); color: var(--medium-risk); }
.severity-low { background: rgba(34,197,94,0.15); color: var(--low-risk); }
.severity-normal { background: rgba(148,163,184,0.15); color: var(--normal); }

/* === Animations === */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}
.fade-in { animation: fadeIn 0.5s ease forwards; }

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}
.pulse { animation: pulse 2s infinite; }

@keyframes spin {
    to { transform: rotate(360deg); }
}
.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* === Scrollbar === */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--bg-tertiary); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* === Responsive === */
@media (max-width: 768px) {
    h1 { font-size: 1.5rem; }
    h2 { font-size: 1.25rem; }
    h3 { font-size: 1.1rem; }
    .btn { padding: 8px 16px; font-size: 0.85rem; }
}

@media (max-width: 550px) {
    .responsive-grid-3 { grid-template-columns: 1fr; }
    .responsive-grid-2 { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
    h1 { font-size: 1.3rem; }
    h2 { font-size: 1.1rem; }
    .btn { padding: 8px 14px; font-size: 0.8rem; }
    .btn-sm { padding: 6px 12px; font-size: 0.75rem; }
    .card { padding: 1.25rem; }
}