/* ============================================================
   4D AI Predictor — Production CSS
   Modern dark theme with glassmorphism & gradient accents
   ============================================================ */

/* ---------- CSS Variables / Design Tokens ---------- */
:root {
    --bg-body:     #0f172a;
    --bg-card:     rgba(30, 41, 59, 0.7);
    --bg-card-solid: #1e293b;
    --bg-surface:  #1e293b;
    --bg-nav:      rgba(15, 23, 42, 0.95);
    --border-subtle: rgba(99, 102, 241, 0.15);
    --border-card: rgba(255, 255, 255, 0.06);
    --text-primary:   #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted:     #64748b;
    --accent-indigo:  #6366f1;
    --accent-violet:  #8b5cf6;
    --accent-cyan:    #22d3ee;
    --accent-emerald: #10b981;
    --accent-amber:   #f59e0b;
    --accent-rose:    #f43f5e;
    --accent-gold:    #facc15;
    --gradient-primary: linear-gradient(135deg, #6366f1, #8b5cf6);
    --gradient-success: linear-gradient(135deg, #10b981, #22d3ee);
    --gradient-danger:  linear-gradient(135deg, #f43f5e, #f97316);
    --gradient-warning: linear-gradient(135deg, #f59e0b, #facc15);
    --glass-blur:      blur(16px);
    --glass-bg:        rgba(30, 41, 59, 0.6);
    --glass-border:    rgba(255, 255, 255, 0.08);
    --radius-sm:   8px;
    --radius-md:   12px;
    --radius-lg:   16px;
    --radius-xl:   24px;
    --shadow-sm:   0 1px 3px rgba(0,0,0,0.3);
    --shadow-md:   0 4px 14px rgba(0,0,0,0.35);
    --shadow-lg:   0 8px 30px rgba(0,0,0,0.4);
    --shadow-glow: 0 0 20px rgba(99,102,241,0.15);
    --transition:  0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---------- Global ---------- */
*, *::before, *::after { box-sizing: border-box; }

body {
    font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: var(--bg-body);
    color: var(--text-primary);
    font-size: 16px;
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

body::before {
    content: '';
    position: fixed;
    inset: 0;
    background:
        radial-gradient(ellipse 80% 60% at 20% 10%, rgba(99,102,241,0.08) 0%, transparent 60%),
        radial-gradient(ellipse 60% 50% at 85% 80%, rgba(139,92,246,0.06) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

.container, .container-fluid { position: relative; z-index: 1; }

a { color: var(--accent-indigo); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent-violet); }

/* ---------- Scrollbar ---------- */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-body); }
::-webkit-scrollbar-thumb { background: var(--accent-indigo); border-radius: 3px; }

/* ---------- Navbar ---------- */
.navbar-main {
    background: var(--bg-nav);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid var(--glass-border);
    padding: 0.6rem 0;
    transition: background var(--transition);
}
.navbar-main .navbar-brand {
    font-size: 1.35rem;
    font-weight: 800;
    letter-spacing: -0.025em;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.navbar-main .navbar-brand .brand-icon {
    width: 32px; height: 32px;
    display: inline-flex; align-items: center; justify-content: center;
    background: var(--gradient-primary);
    border-radius: var(--radius-sm);
    color: #fff;
    font-weight: 800; font-size: 0.85rem;
    -webkit-text-fill-color: #fff;
    margin-right: 0.5rem;
}
.navbar-main .nav-link {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 1rem;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    transition: all var(--transition);
    position: relative;
}
.navbar-main .nav-link:hover,
.navbar-main .nav-link.active {
    color: #fff;
    background: rgba(99, 102, 241, 0.12);
}
.navbar-main .nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -2px; left: 50%; transform: translateX(-50%);
    width: 20px; height: 2px;
    background: var(--accent-indigo);
    border-radius: 1px;
}
.navbar-toggler {
    border: 1px solid var(--glass-border);
    padding: 0.4rem 0.6rem;
}
.navbar-toggler-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='30' height='30' fill='%23f1f5f9' viewBox='0 0 30 30'%3e%3cpath stroke='%23f1f5f9' stroke-linecap='round' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

/* ---------- Page Header / Hero ---------- */
.page-hero {
    padding: 2rem 0 1.5rem;
    text-align: center;
}
.page-hero h1, .page-hero h2 {
    font-weight: 800;
    font-size: 2rem;
    letter-spacing: -0.025em;
    margin-bottom: 0.5rem;
}
.page-hero .hero-icon {
    width: 56px; height: 56px;
    display: inline-flex; align-items: center; justify-content: center;
    border-radius: var(--radius-lg);
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #fff;
}
.page-hero .hero-icon.indigo  { background: var(--gradient-primary); }
.page-hero .hero-icon.emerald { background: var(--gradient-success); }
.page-hero .hero-icon.rose    { background: var(--gradient-danger); }
.page-hero .hero-icon.amber   { background: var(--gradient-warning); }
.page-hero p { color: var(--text-secondary); font-size: 1.05rem; max-width: 600px; margin: 0 auto; }

/* ---------- Glass Card ---------- */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: transform var(--transition), box-shadow var(--transition);
    overflow: hidden;
}
.glass-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}
.glass-card .card-header {
    background: transparent;
    border-bottom: 1px solid var(--glass-border);
    padding: 1rem 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}
.glass-card .card-body {
    padding: 1.25rem;
}

/* ---------- Stat Mini Card ---------- */
.stat-card {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
    text-align: center;
    transition: transform var(--transition), box-shadow var(--transition);
    position: relative;
    overflow: hidden;
}
.stat-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}
.stat-card.indigo::before  { background: var(--gradient-primary); }
.stat-card.emerald::before { background: var(--gradient-success); }
.stat-card.rose::before    { background: var(--gradient-danger); }
.stat-card.amber::before   { background: var(--gradient-warning); }
.stat-card.cyan::before    { background: linear-gradient(135deg, #22d3ee, #06b6d4); }
.stat-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}
.stat-card .stat-icon {
    width: 48px; height: 48px;
    display: inline-flex; align-items: center; justify-content: center;
    border-radius: var(--radius-md);
    font-size: 1.35rem;
    margin-bottom: 0.75rem;
    color: #fff;
}
.stat-card .stat-icon.indigo  { background: var(--gradient-primary); }
.stat-card .stat-icon.emerald { background: var(--gradient-success); }
.stat-card .stat-icon.rose    { background: var(--gradient-danger); }
.stat-card .stat-icon.amber   { background: var(--gradient-warning); }
.stat-card .stat-icon.cyan    { background: linear-gradient(135deg, #22d3ee, #06b6d4); }
.stat-card .stat-value {
    font-size: 2rem;
    font-weight: 800;
    line-height: 1;
    margin-bottom: 0.35rem;
    color: var(--text-primary);
}
.stat-card .stat-label {
    font-size: 0.95rem;
    color: var(--text-muted);
    font-weight: 500;
}

/* ---------- Section Headers ---------- */
.section-title {
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.section-title .icon-box {
    width: 32px; height: 32px;
    display: inline-flex; align-items: center; justify-content: center;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    color: #fff;
}
.section-title .icon-box.indigo  { background: var(--gradient-primary); }
.section-title .icon-box.emerald { background: var(--gradient-success); }
.section-title .icon-box.rose    { background: var(--gradient-danger); }
.section-title .icon-box.amber   { background: var(--gradient-warning); }
.section-title .icon-box.cyan    { background: linear-gradient(135deg, #22d3ee, #06b6d4); }

/* ---------- Tables (Dark) ---------- */
.table-dark-custom {
    --bs-table-bg: transparent;
    --bs-table-color: var(--text-primary);
    --bs-table-border-color: var(--glass-border);
    width: 100%;
    margin-bottom: 0;
}
.table-dark-custom thead th {
    background: rgba(15, 23, 42, 0.5);
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.95rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-bottom: 1px solid var(--glass-border);
    padding: 0.85rem 1rem;
    white-space: nowrap;
}
.table-dark-custom tbody td {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
    vertical-align: middle;
    font-size: 1rem;
}
.table-dark-custom tbody tr { transition: background var(--transition); }
.table-dark-custom tbody tr:hover { background: rgba(99, 102, 241, 0.06); }
.table-dark-custom tbody tr:last-child td { border-bottom: none; }

/* ---------- Badges ---------- */
.badge-glow {
    padding: 0.35em 0.7em;
    border-radius: 6px;
    font-weight: 600;
    font-size: 0.95rem;
    letter-spacing: 0.02em;
}
.badge-indigo  { background: rgba(99, 102, 241, 0.15);  color: #a5b4fc; }
.badge-emerald { background: rgba(16, 185, 129, 0.15);  color: #6ee7b7; }
.badge-rose    { background: rgba(244, 63, 94, 0.15);   color: #fda4af; }
.badge-amber   { background: rgba(245, 158, 11, 0.15);  color: #fcd34d; }
.badge-cyan    { background: rgba(34, 211, 238, 0.15);  color: #67e8f9; }
.badge-dark    { background: rgba(15, 23, 42, 0.8);     color: var(--text-primary); }

/* ---------- Number Display ---------- */
.number-display {
    font-family: 'JetBrains Mono', 'Fira Code', 'Courier New', monospace;
    font-size: 1.6rem;
    font-weight: 700;
    letter-spacing: 4px;
    color: #fff;
}

/* ---------- Rank Badges ---------- */
.prediction-rank {
    width: 40px; height: 40px;
    border-radius: 50%;
    display: inline-flex; align-items: center; justify-content: center;
    font-weight: 700; font-size: 1rem;
}
.rank-1 { background: linear-gradient(135deg, #facc15, #f59e0b); color: #000; box-shadow: 0 0 12px rgba(250,204,21,0.3); }
.rank-2 { background: linear-gradient(135deg, #e2e8f0, #94a3b8); color: #1e293b; }
.rank-3 { background: linear-gradient(135deg, #d97706, #92400e); color: #fff; }
.rank-default { background: rgba(51, 65, 85, 0.6); color: var(--text-secondary); }

/* ---------- Progress Bars ---------- */
.progress-dark {
    background: rgba(51, 65, 85, 0.5);
    border-radius: 10px;
    height: 8px;
    overflow: hidden;
}
.progress-dark .progress-bar {
    border-radius: 10px;
    transition: width 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}
.progress-bar-indigo  { background: var(--gradient-primary); }
.progress-bar-emerald { background: var(--gradient-success); }
.progress-bar-rose    { background: var(--gradient-danger); }
.progress-bar-amber   { background: var(--gradient-warning); }

/* ---------- Buttons ---------- */
.btn-glow {
    border: none;
    font-weight: 600;
    padding: 0.75rem 2rem;
    border-radius: var(--radius-md);
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}
.btn-glow::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    opacity: 0;
    transition: opacity var(--transition);
    background: rgba(255,255,255,0.1);
}
.btn-glow:hover::before { opacity: 1; }
.btn-glow.indigo  { background: var(--gradient-primary); color: #fff; box-shadow: 0 4px 15px rgba(99,102,241,0.3); }
.btn-glow.emerald { background: var(--gradient-success); color: #fff; box-shadow: 0 4px 15px rgba(16,185,129,0.3); }
.btn-glow.amber   { background: var(--gradient-warning); color: #000; box-shadow: 0 4px 15px rgba(245,158,11,0.3); }
.btn-glow:hover { transform: translateY(-1px); }
.btn-glow:active { transform: translateY(0); }

.btn-ghost {
    background: transparent;
    border: 1px solid var(--glass-border);
    color: var(--text-secondary);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    font-weight: 500;
    transition: all var(--transition);
}
.btn-ghost:hover {
    border-color: var(--accent-indigo);
    color: var(--accent-indigo);
    background: rgba(99,102,241,0.08);
}

/* ---------- Form Controls (Dark) ---------- */
.form-control-dark,
.form-select-dark {
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    border-radius: var(--radius-sm);
    padding: 0.65rem 0.95rem;
    font-size: 1rem;
    transition: border-color var(--transition), box-shadow var(--transition);
}
.form-control-dark:focus,
.form-select-dark:focus {
    background: rgba(15, 23, 42, 0.8);
    border-color: var(--accent-indigo);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
    color: var(--text-primary);
    outline: none;
}
.form-control-dark::placeholder { color: var(--text-muted); }

.input-group-dark .input-group-text {
    background: rgba(51, 65, 85, 0.5);
    border: 1px solid var(--glass-border);
    color: var(--text-secondary);
}

/* ---------- Alerts (Dark) ---------- */
.alert-dark-info {
    background: rgba(34, 211, 238, 0.08);
    border: 1px solid rgba(34, 211, 238, 0.15);
    border-radius: var(--radius-md);
    color: #67e8f9;
    padding: 1rem 1.25rem;
}
.alert-dark-success {
    background: rgba(16, 185, 129, 0.08);
    border: 1px solid rgba(16, 185, 129, 0.15);
    border-radius: var(--radius-md);
    color: #6ee7b7;
}
.alert-dark-warning {
    background: rgba(245, 158, 11, 0.08);
    border: 1px solid rgba(245, 158, 11, 0.15);
    border-radius: var(--radius-md);
    color: #fcd34d;
}
.alert-dark-danger {
    background: rgba(244, 63, 94, 0.08);
    border: 1px solid rgba(244, 63, 94, 0.15);
    border-radius: var(--radius-md);
    color: #fda4af;
}

/* ---------- Footer ---------- */
.footer-main {
    background: rgba(15, 23, 42, 0.95);
    border-top: 1px solid var(--glass-border);
    padding: 2rem 0;
    margin-top: 3rem;
}
.footer-main .footer-disclaimer {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.6;
}
.footer-main .footer-disclaimer strong {
    color: var(--accent-amber);
}

/* ---------- Animations ---------- */
@keyframes pulse-glow {
    0%, 100% { box-shadow: 0 0 8px rgba(99,102,241,0.2); }
    50% { box-shadow: 0 0 20px rgba(99,102,241,0.4); }
}
.pulse-glow { animation: pulse-glow 2s infinite; }

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(16px); }
    to   { opacity: 1; transform: translateY(0); }
}
.animate-in {
    animation: fadeInUp 0.4s ease-out forwards;
    opacity: 0;
}
.delay-1 { animation-delay: 0.05s; }
.delay-2 { animation-delay: 0.1s; }
.delay-3 { animation-delay: 0.15s; }
.delay-4 { animation-delay: 0.2s; }

@keyframes shimmer {
    0%   { background-position: -200px 0; }
    100% { background-position: 200px 0; }
}
.skeleton {
    background: linear-gradient(90deg, var(--bg-card-solid) 25%, rgba(51,65,85,0.5) 50%, var(--bg-card-solid) 75%);
    background-size: 400px 100%;
    animation: shimmer 1.5s infinite;
    border-radius: var(--radius-sm);
}

/* ---------- Score Bar ---------- */
.score-bar {
    height: 8px;
    border-radius: 10px;
    transition: width 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---------- Budget Item ---------- */
.budget-item {
    padding: 0.65rem 0;
    border-bottom: 1px solid rgba(255,255,255,0.04);
}
.budget-item:last-child { border-bottom: none; }

/* ---------- Chart.js Dark ---------- */
.chart-container { position: relative; }
.chart-container canvas { filter: drop-shadow(0 0 8px rgba(99,102,241,0.1)); }

/* ---------- Install Banner ---------- */
.pwa-install-banner {
    position: fixed;
    bottom: 0; left: 0; right: 0;
    background: var(--bg-nav);
    backdrop-filter: var(--glass-blur);
    border-top: 1px solid var(--glass-border);
    padding: 0.75rem 1rem;
    z-index: 1050;
    display: none;
    animation: fadeInUp 0.3s ease-out;
}

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
    .page-hero h1, .page-hero h2 { font-size: 1.6rem; }
    .page-hero .hero-icon { width: 48px; height: 48px; font-size: 1.25rem; }
    .page-hero p { font-size: 1rem; }
    .stat-card .stat-value { font-size: 1.6rem; }
    .stat-card .stat-label { font-size: 0.9rem; }
    .number-display { font-size: 1.35rem; letter-spacing: 2px; }
    .glass-card .card-body { padding: 1rem; }
    .table-dark-custom thead th { font-size: 0.85rem; padding: 0.65rem 0.75rem; }
    .table-dark-custom tbody td { padding: 0.6rem 0.75rem; font-size: 0.95rem; }
    .btn-glow { padding: 0.65rem 1.5rem; font-size: 1rem; }
    .prediction-rank { width: 34px; height: 34px; font-size: 0.9rem; }
    .navbar-main .nav-link { padding: 0.6rem 0.8rem; font-size: 0.95rem; }
    .section-title { font-size: 1.05rem; }
    .badge-glow { font-size: 0.9rem; }
    .footer-main .footer-disclaimer { font-size: 0.9rem; }
}

@media (max-width: 576px) {
    .container { padding-left: 12px; padding-right: 12px; }
    .stat-card { padding: 0.9rem; }
    .stat-card .stat-icon { width: 40px; height: 40px; font-size: 1.1rem; margin-bottom: 0.5rem; }
    .stat-card .stat-value { font-size: 1.5rem; }
    .stat-card .stat-label { font-size: 0.875rem; }
    .page-hero h1, .page-hero h2 { font-size: 1.4rem; }
    .table-dark-custom thead th { font-size: 0.8rem; }
    .table-dark-custom tbody td { font-size: 0.9rem; }
}

/* ---------- Form Labels ---------- */
.form-label { color: var(--text-secondary); font-weight: 500; font-size: 1rem; }

/* ---------- Font Monospace ---------- */
.font-monospace { font-family: 'JetBrains Mono', 'Fira Code', 'Courier New', monospace !important; }

/* ---------- Company Filter Pills ---------- */
.company-filter {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
}
.company-pill {
    display: inline-flex;
    align-items: center;
    padding: 0.5rem 1.1rem;
    border-radius: 9999px;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-secondary);
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.08);
    text-decoration: none;
    transition: all 0.2s ease;
    white-space: nowrap;
}
.company-pill:hover {
    background: rgba(99,102,241,0.15);
    border-color: var(--accent-indigo);
    color: var(--accent-indigo);
}
.company-pill.active {
    background: var(--accent-indigo);
    border-color: var(--accent-indigo);
    color: #fff;
    box-shadow: 0 0 12px rgba(99,102,241,0.4);
}
@media (max-width: 576px) {
    .company-pill { padding: 0.4rem 0.85rem; font-size: 0.875rem; }
}