:root {
    color-scheme: light;
    --ink: #172033;
    --muted: #64748b;
    --line: #dbe3ee;
    --panel: #ffffff;
    --bg: #f4f7fb;
    --blue: #2563eb;
    --green: #15803d;
    --red: #b91c1c;
    --nav: #111827;
    --teal: #0f766e;
    --shadow: 0 18px 45px rgba(15, 23, 42, 0.10);
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: Arial, sans-serif;
    color: var(--ink);
    background:
        linear-gradient(135deg, rgba(15, 118, 110, 0.18), rgba(37, 99, 235, 0.14) 42%, rgba(255,255,255,0) 360px),
        var(--bg);
}

a { color: var(--blue); }

.shell {
    max-width: 1180px;
    margin: 0 auto;
    padding: 22px 18px 44px;
}

.app-tabs {
    position: sticky;
    top: 0;
    z-index: 10;
    display: flex;
    gap: 8px;
    overflow-x: auto;
    margin-bottom: 16px;
    padding: 10px;
    border: 1px solid rgba(203, 216, 234, 0.92);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.94);
    backdrop-filter: blur(14px);
    box-shadow: var(--shadow);
}

.app-tabs button {
    flex: 0 0 auto;
    min-height: 38px;
    padding: 10px 14px;
    border: 0;
    border-radius: 8px;
    background: transparent;
    color: var(--nav);
    font: inherit;
    font-weight: 700;
    cursor: pointer;
}

.app-tabs button:hover,
.app-tabs button.active {
    background: linear-gradient(135deg, var(--nav), var(--teal));
    color: #ffffff;
}

.logout-form {
    margin-left: auto;
}

.logout-form button {
    background: #ffffff;
    color: var(--nav);
    border: 1px solid var(--line);
}

.hero,
.panel,
.summary-grid article {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.hero {
    display: flex;
    justify-content: space-between;
    gap: 18px;
    padding: 24px;
    border: 0;
    background: linear-gradient(135deg, #111827, #2563eb 68%, #0f766e);
    color: #ffffff;
}

.hero p,
.hero h1,
.hero span { margin: 0; }

.hero p,
.section-heading span,
.summary-grid span,
.trip-banner span,
.passenger-list span,
.trip-list span,
.service-grid span {
    color: var(--muted);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0;
    text-transform: uppercase;
}

.hero p,
.hero span { color: #dbeafe; }

.hero h1 {
    margin-top: 4px;
    font-size: 28px;
}

.hero strong {
    align-self: center;
    padding: 8px 12px;
    border: 1px solid rgba(255,255,255,0.32);
    border-radius: 999px;
    background: rgba(255,255,255,0.14);
    white-space: nowrap;
}

.notice {
    margin-top: 16px;
    padding: 14px 16px;
    border: 1px solid #bbf7d0;
    border-radius: 8px;
    background: #f0fdf4;
    color: var(--green);
    font-weight: 700;
}

.summary-grid {
    display: grid;
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 14px;
    margin-top: 16px;
}

.summary-grid article {
    padding: 18px;
    border-top: 4px solid var(--teal);
}

.summary-grid strong {
    display: block;
    margin-top: 8px;
    font-size: 24px;
}

.panel {
    padding: 22px;
    margin-top: 18px;
}

.trip-banner {
    display: flex;
    justify-content: space-between;
    gap: 18px;
    border-left: 6px solid var(--teal);
}

.trip-banner h2,
.section-heading h2 {
    margin: 4px 0 0;
}

.trip-banner p {
    margin: 8px 0 0;
    color: var(--muted);
}

.trip-banner strong {
    align-self: center;
    padding: 8px 12px;
    border-radius: 999px;
    background: #ecfdf5;
    color: var(--green);
}

.workspace-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(300px, 0.8fr);
    gap: 18px;
}

[data-tab-panel][hidden] { display: none; }

.wide-panel { grid-column: span 1; }

.section-heading { margin-bottom: 18px; }

.form-grid {
    display: grid;
    gap: 14px;
}

.form-grid.two-col {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.form-grid label {
    display: grid;
    gap: 7px;
    color: var(--muted);
    font-size: 13px;
    font-weight: 700;
}

input,
select,
textarea {
    width: 100%;
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 11px 12px;
    color: var(--ink);
    font: inherit;
    background: #ffffff;
}

button {
    min-height: 42px;
    border: 0;
    border-radius: 8px;
    background: linear-gradient(135deg, #2563eb, #0f766e);
    color: #ffffff;
    font: inherit;
    font-weight: 700;
    cursor: pointer;
}

.passenger-list,
.trip-list,
.service-grid {
    display: grid;
    gap: 12px;
}

.passenger-list article,
.trip-list article,
.service-grid article {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 4px 12px;
    padding: 14px;
    border: 1px solid var(--line);
    border-left: 4px solid #dbeafe;
    border-radius: 8px;
    background: #ffffff;
}

.passenger-list strong,
.passenger-list p,
.trip-list strong,
.trip-list p {
    grid-column: 1 / -1;
    margin: 0;
}

.passenger-list p,
.trip-list p {
    color: var(--muted);
}

.passenger-list b,
.trip-list b {
    color: var(--green);
}

.service-grid {
    grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
}

.service-grid article {
    display: block;
}

.service-grid strong,
.service-grid span,
.service-grid a {
    display: block;
    margin-top: 4px;
}

.login-shell {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 24px;
}

.login-card {
    width: min(920px, 100%);
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(320px, 0.8fr);
    gap: 28px;
    align-items: center;
    padding: 34px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #ffffff;
    box-shadow: var(--shadow);
}

.login-card span {
    color: var(--teal);
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
}

.login-card h1 {
    margin: 8px 0 10px;
    font-size: 32px;
}

.login-card p {
    margin: 0;
    color: var(--muted);
    line-height: 1.5;
}

.login-card .notice {
    color: var(--green);
    margin-top: 0;
}

.login-card form {
    display: grid;
    gap: 14px;
}

.login-card label {
    display: grid;
    gap: 7px;
    color: var(--muted);
    font-size: 13px;
    font-weight: 700;
}

@media (max-width: 900px) {
    .summary-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .workspace-grid,
    .trip-banner {
        grid-template-columns: 1fr;
        flex-direction: column;
    }

    .login-card {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 560px) {
    .shell { padding: 14px; }

    .app-tabs {
        align-items: stretch;
    }

    .logout-form {
        margin-left: 0;
    }

    .logout-form button {
        width: 100%;
    }

    .summary-grid,
    .form-grid.two-col {
        grid-template-columns: 1fr;
    }

    .hero {
        flex-direction: column;
    }

    .hero strong {
        align-self: flex-start;
        white-space: normal;
    }

    .login-card {
        padding: 24px;
    }
}