:root {
    --pri: #6366f1;
    --pri-dark: #4338ca;
    --accent: #06b6d4;
    --bg: #0f172a;
    --bg-card: #1e293b;
    --bg-surface: #334155;
    --text: #f8fafc;
    --text-muted: #94a3b8;
    --green: #10b981;
    --amber: #f59e0b;
    --red: #ef4444;
    --radius: 16px;
    --shadow: 0 4px 24px rgba(0,0,0,.3);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    padding-bottom: 80px;
}

.gradient-header {
    background: linear-gradient(135deg, #1e1b4b 0%, #312e81 30%, #0e7490 100%);
    padding: 24px 20px 32px;
    border-radius: 0 0 24px 24px;
    position: relative;
    overflow: hidden;
}
.gradient-header::before {
    content: '';
    position: absolute; inset: 0;
    background: radial-gradient(circle at 80% 20%, rgba(99,102,241,.3), transparent 60%);
}
.gradient-header h1 {
    font-size: 22px; font-weight: 800;
    position: relative; z-index: 1;
}
.gradient-header p {
    color: rgba(255,255,255,.7);
    font-size: 13px; margin-top: 4px;
    position: relative; z-index: 1;
}

.container { max-width: 480px; margin: 0 auto; padding: 0 16px; }

.card {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 20px;
    margin-top: 16px;
    box-shadow: var(--shadow);
    border: 1px solid rgba(255,255,255,.06);
}

.card-title {
    font-size: 15px; font-weight: 700;
    margin-bottom: 12px;
    display: flex; align-items: center; gap: 8px;
}
.card-title i { color: var(--pri); font-size: 14px; }

.stat-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    margin-top: 16px;
}
.stat-card {
    background: var(--bg-surface);
    border-radius: 12px;
    padding: 14px;
    text-align: center;
}
.stat-card .stat-value {
    font-size: 24px; font-weight: 800;
    background: linear-gradient(135deg, var(--pri), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.stat-card .stat-label {
    font-size: 11px; color: var(--text-muted);
    text-transform: uppercase; letter-spacing: .05em;
    margin-top: 4px;
}

.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    padding: 12px 20px;
    border-radius: 12px;
    font-size: 14px; font-weight: 700;
    border: none; cursor: pointer;
    transition: all .15s ease;
    text-decoration: none;
    width: 100%;
}
.btn-primary {
    background: linear-gradient(135deg, var(--pri), var(--pri-dark));
    color: #fff;
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 8px 24px rgba(99,102,241,.3); }
.btn-success { background: linear-gradient(135deg, var(--green), #059669); color: #fff; }
.btn-danger { background: linear-gradient(135deg, var(--red), #dc2626); color: #fff; }
.btn-ghost {
    background: transparent;
    border: 1.5px solid rgba(255,255,255,.15);
    color: var(--text-muted);
}

.input-group { margin-bottom: 16px; }
.input-group label {
    display: block;
    font-size: 12px; font-weight: 600;
    color: var(--text-muted);
    margin-bottom: 6px;
    text-transform: uppercase;
    letter-spacing: .04em;
}
.input-group input, .input-group select, .input-group textarea {
    width: 100%;
    padding: 12px 16px;
    border-radius: 12px;
    border: 1.5px solid rgba(255,255,255,.1);
    background: var(--bg-surface);
    color: var(--text);
    font-size: 15px;
    outline: none;
    transition: border-color .15s;
}
.input-group input:focus, .input-group select:focus, .input-group textarea:focus {
    border-color: var(--pri);
}
.input-group input::placeholder { color: var(--text-muted); }

.badge {
    display: inline-flex; align-items: center; gap: 4px;
    padding: 4px 10px;
    border-radius: 999px;
    font-size: 11px; font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .03em;
}
.badge-pending { background: rgba(245,158,11,.15); color: var(--amber); }
.badge-approved { background: rgba(99,102,241,.15); color: var(--pri); }
.badge-progress { background: rgba(6,182,212,.15); color: var(--accent); }
.badge-completed { background: rgba(16,185,129,.15); color: var(--green); }
.badge-cancelled { background: rgba(239,68,68,.15); color: var(--red); }

.trip-card {
    background: var(--bg-surface);
    border-radius: 12px;
    padding: 14px;
    margin-bottom: 10px;
    border: 1px solid rgba(255,255,255,.05);
}
.trip-card .trip-route {
    display: flex; align-items: center; gap: 8px;
    font-size: 14px; font-weight: 600;
    margin-bottom: 8px;
}
.trip-card .trip-route i { color: var(--accent); font-size: 12px; }
.trip-card .trip-meta {
    display: flex; flex-wrap: wrap; gap: 8px;
    font-size: 12px; color: var(--text-muted);
}
.trip-card .trip-meta span {
    display: inline-flex; align-items: center; gap: 4px;
}

.bottom-nav {
    position: fixed; bottom: 0; left: 0; right: 0;
    background: var(--bg-card);
    border-top: 1px solid rgba(255,255,255,.08);
    display: flex;
    padding: 8px 0 calc(8px + env(safe-area-inset-bottom));
    z-index: 100;
    backdrop-filter: blur(12px);
}
.bottom-nav a {
    flex: 1;
    display: flex; flex-direction: column;
    align-items: center;
    gap: 4px;
    text-decoration: none;
    color: var(--text-muted);
    font-size: 10px; font-weight: 600;
    padding: 6px 0;
    transition: color .15s;
}
.bottom-nav a i { font-size: 18px; }
.bottom-nav a.active { color: var(--pri); }

.empty-state {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-muted);
}
.empty-state i { font-size: 40px; margin-bottom: 12px; color: var(--bg-surface); }
.empty-state p { font-size: 14px; }

.login-page {
    min-height: 100vh;
    display: flex; flex-direction: column;
    align-items: center; justify-content: center;
    padding: 24px;
    background: linear-gradient(180deg, #0f172a 0%, #1e1b4b 50%, #0e7490 100%);
}
.login-box {
    width: 100%; max-width: 380px;
    background: var(--bg-card);
    border-radius: 24px;
    padding: 32px 24px;
    box-shadow: 0 20px 60px rgba(0,0,0,.5);
    border: 1px solid rgba(255,255,255,.08);
}
.login-logo {
    text-align: center; margin-bottom: 24px;
}
.login-logo h2 {
    font-size: 24px; font-weight: 800;
    background: linear-gradient(135deg, var(--pri), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.login-logo p { color: var(--text-muted); font-size: 13px; margin-top: 4px; }

.alert {
    padding: 12px 16px;
    border-radius: 12px;
    font-size: 13px; font-weight: 600;
    margin-bottom: 16px;
    display: none;
}
.alert-error { background: rgba(239,68,68,.15); color: var(--red); display: block; }
.alert-success { background: rgba(16,185,129,.15); color: var(--green); display: block; }

@media (min-width: 600px) {
    .container { max-width: 560px; }
    .stat-grid { grid-template-columns: repeat(4, 1fr); }
}