:root {
    /* surfaces & lines */
    --bg: #f8fafc;
    --surface: #ffffff;
    --surface-2: #f8fafc;
    --line: #e2e8f0;
    --line-soft: #f1f5f9;

    /* text ramp */
    --heading: #0f172a;
    --text: #334155;
    --text-strong: #1e293b;
    --muted: #64748b;
    --muted-faint: #94a3b8;

    /* brand (indigo) */
    --accent: #4f46e5;
    --accent-hover: #4338ca;
    --accent-tint: #eef2ff;
    --accent-tint-text: #4338ca;

    /* semantic */
    --danger: #be123c;
    --ok-bg: #ecfdf5;     --ok-text: #047857;
    --warn-bg: #fffbeb;   --warn-text: #b45309;
    --danger-bg: #fff1f2; --danger-text: #be123c;
    --info-bg: #eef2ff;   --info-text: #4338ca;

    /* type */
    --font-display: "Sora", ui-sans-serif, system-ui, "Segoe UI", sans-serif;
    --font-sans: "Inter", ui-sans-serif, system-ui, "Segoe UI", sans-serif;
    --font-mono: "JetBrains Mono", ui-monospace, "Cascadia Mono", monospace;

    /* shape & elevation */
    --radius-card: 14px;
    --radius-control: 10px;
    --shadow-card: 0 1px 2px rgba(15, 23, 42, .05), 0 4px 14px rgba(15, 23, 42, .05);
    --shadow-card-hover: 0 12px 30px rgba(15, 23, 42, .12);
    --focus-ring: 0 0 0 2px #ffffff, 0 0 0 4px #6366f1;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: var(--font-sans);
    font-size: 14px;
    -webkit-font-smoothing: antialiased;
}

.app-header {
    background: var(--surface);
    color: var(--heading);
    padding: 14px 26px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    border-bottom: 1px solid var(--line-soft);
}

.brand {
    font-family: var(--font-display);
    font-size: 20px;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--heading);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
}

.brand::before {
    content: "";
    width: 22px;
    height: 22px;
    border-radius: 6px;
    background: var(--accent);
    margin-right: 9px;
}

.brand:hover {
    color: var(--accent);
}

.subtitle {
    margin-top: 3px;
    color: var(--muted);
    font-size: 13px;
}

.tabs {
    display: flex;
    gap: 2px;
    overflow-x: auto;
    padding: 0 20px;
    background: var(--surface);
    border-bottom: 1px solid var(--line-soft);
}

.tabs a {
    color: var(--text);
    padding: 10px 12px;
    text-decoration: none;
    white-space: nowrap;
}

.tabs a:hover {
    background: var(--surface-2);
}

.login-status {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--muted);
    text-align: right;
}

.login-status a {
    color: var(--accent);
    text-decoration: none;
}

.login-status a:hover {
    text-decoration: underline;
}

.link-button {
    background: var(--surface);
    color: var(--text);
    border: 1px solid var(--line);
    border-radius: var(--radius-control);
    padding: 7px 12px;
    font-weight: 500;
}

.link-button:hover {
    background: var(--surface-2);
    border-color: var(--muted-faint);
}

.app-body {
    display: flex;
    align-items: stretch;
}

.app-shell {
    flex: 1;
    min-width: 0;
    padding: 22px 26px 40px;
}

.page-header {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 18px;
}

h1, h2, h3, h4 {
    margin: 0;
    font-family: var(--font-display);
    color: var(--heading);
    letter-spacing: -0.02em;
}

h1 {
    font-size: 24px;
}

h2 {
    font-size: 15px;
    margin-bottom: 12px;
}

.summary-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(180px, 1fr));
    gap: 12px;
    margin-bottom: 16px;
}

.metric, .panel {
    background: var(--surface);
    border: 1px solid var(--line-soft);
    border-radius: var(--radius-card);
}

.metric {
    padding: 18px;
    box-shadow: var(--shadow-card);
}

.metric span {
    display: block;
    color: var(--muted-faint);
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-bottom: 7px;
}

.metric strong {
    font-family: var(--font-display);
    font-size: 24px;
    color: var(--heading);
}

.work-grid {
    display: grid;
    grid-template-columns: 360px minmax(0, 1fr);
    gap: 16px;
    align-items: start;
}

.auth-grid {
    max-width: 460px;
}

.panel {
    padding: 16px;
    overflow: auto;
}

.form-panel {
    display: grid;
    gap: 12px;
}

label {
    display: grid;
    gap: 5px;
    color: var(--text-strong);
    font-size: 13px;
    font-weight: 500;
}

input, select, textarea {
    width: 100%;
    border: 1px solid var(--line);
    border-radius: var(--radius-control);
    padding: 9px 11px;
    color: var(--text);
    background: var(--surface);
    font-family: var(--font-sans);
    font-size: 14px;
}

input::placeholder, textarea::placeholder {
    color: var(--muted-faint);
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: var(--focus-ring);
}

textarea {
    min-height: 76px;
}

button {
    width: fit-content;
    border: 0;
    border-radius: var(--radius-control);
    background: var(--accent);
    color: white;
    padding: 10px 16px;
    font-family: var(--font-sans);
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    transition: background .15s, box-shadow .15s, transform .05s;
}

button:hover {
    background: var(--accent-hover);
    box-shadow: var(--shadow-card);
}

button:active {
    transform: scale(.985);
}

table {
    width: 100%;
    border-collapse: collapse;
    background: var(--surface);
}

th, td {
    border-bottom: 1px solid var(--line-soft);
    padding: 10px 10px;
    text-align: left;
    vertical-align: top;
}

th {
    color: var(--muted-faint);
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    background: var(--surface-2);
}

tbody tr:hover {
    background: var(--surface-2);
}

.num {
    text-align: right;
    white-space: nowrap;
    font-family: var(--font-mono);
}

.check-row {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text);
}

.check-row input {
    width: auto;
}

.filter-row {
    display: flex;
    gap: 8px;
    align-items: end;
    margin-bottom: 10px;
}

.filter-row input {
    max-width: 170px;
}

.message {
    min-height: 20px;
    color: var(--danger);
}

.success-message {
    min-height: 20px;
    color: var(--ok-text);
}

.inline-form {
    display: flex;
    gap: 6px;
    align-items: center;
}

.inline-form select {
    min-width: 110px;
}

.reset-form {
    display: grid;
    gap: 6px;
    margin-top: 8px;
    max-width: 220px;
}

details {
    margin-top: 8px;
}

.total-line {
    margin: 8px 0 10px;
}

/* ---------------------------------------------------------------------------
   Grouped site navigation
--------------------------------------------------------------------------- */

.site-nav {
    background: var(--surface);
    border-right: 1px solid var(--line-soft);
    padding: 16px 12px;
    width: 216px;
    flex-shrink: 0;
}

.nav-toggle-input {
    display: none;
    width: auto;
}

.nav-toggle {
    display: none;
    padding: 10px 0;
    color: var(--text);
    font-weight: 600;
    cursor: pointer;
}

.nav-groups {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.nav-group {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 1px;
    padding: 0;
}

.nav-group + .nav-group {
    border-top: 1px solid var(--line-soft);
    margin-top: 10px;
    padding-top: 10px;
}

.nav-group-label {
    display: block;
    color: var(--muted-faint);
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    padding: 0 10px;
    margin: 0 0 6px;
}

.nav-group a {
    display: flex;
    align-items: center;
    gap: 9px;
    color: var(--muted);
    padding: 8px 10px;
    text-decoration: none;
    border-radius: var(--radius-control);
    font-weight: 500;
    transition: background .12s, color .12s;
}

.nav-group a:hover {
    background: var(--surface-2);
    color: var(--text-strong);
}

.nav-group a.active {
    color: var(--accent-tint-text);
    font-weight: 600;
    background: var(--accent-tint);
}

/* ---------------------------------------------------------------------------
   Page headers and panels
--------------------------------------------------------------------------- */

.page-subtitle {
    margin: 4px 0 0;
    color: var(--muted);
}

.empty-state {
    color: var(--muted);
    background: var(--surface-2);
    border: 1px dashed var(--line);
    border-radius: var(--radius-card);
    padding: 22px 16px;
    margin: 0;
    text-align: center;
}

.content-panel {
    max-width: 760px;
}

.content-panel h2 {
    margin-top: 16px;
}

.content-panel h2:first-child {
    margin-top: 0;
}

/* ---------------------------------------------------------------------------
   Dashboard KPI cards
--------------------------------------------------------------------------- */

.kpi-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(180px, 1fr));
    gap: 12px;
    margin-bottom: 16px;
}

.kpi {
    background: var(--surface);
    border: 1px solid var(--line-soft);
    border-radius: var(--radius-card);
    padding: 18px;
    box-shadow: var(--shadow-card);
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.kpi span {
    color: var(--muted-faint);
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.kpi strong {
    font-family: var(--font-display);
    font-size: 24px;
    color: var(--heading);
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.kpi small {
    color: var(--muted);
}

.kpi-alert {
    border-color: #fecdd3;
    background: var(--danger-bg);
}

.kpi-alert strong {
    color: var(--danger);
}

.kpi-link {
    color: var(--accent);
    text-decoration: none;
    font-weight: 600;
    margin-top: 4px;
}

.kpi-link:hover {
    text-decoration: underline;
}

.badge {
    font-style: normal;
    font-size: 11px;
    font-weight: 600;
    padding: 3px 9px;
    border-radius: 999px;
    white-space: nowrap;
    box-shadow: inset 0 0 0 1px var(--badge-ring, transparent);
}

.badge-ok {
    background: var(--ok-bg);
    color: var(--ok-text);
    --badge-ring: rgba(5, 150, 105, .2);
}

.badge-info {
    background: var(--info-bg);
    color: var(--info-text);
    --badge-ring: rgba(79, 70, 229, .2);
}

.badge-warn {
    background: var(--warn-bg);
    color: var(--warn-text);
    --badge-ring: rgba(217, 119, 6, .2);
}

.badge-danger {
    background: var(--danger-bg);
    color: var(--danger-text);
    --badge-ring: rgba(225, 29, 72, .2);
}

.dash-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
}

/* ---------------------------------------------------------------------------
   Anonymous landing
--------------------------------------------------------------------------- */

.hero {
    background: var(--surface);
    border: 1px solid var(--line-soft);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    padding: 48px 32px;
    text-align: center;
    margin-bottom: 16px;
}

.hero-badge {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    color: var(--accent);
    background: var(--accent-tint);
    padding: 5px 13px;
    border-radius: 999px;
    margin-bottom: 18px;
}

.hero h1 {
    font-size: 32px;
    line-height: 1.15;
    margin: 0 auto 14px;
    max-width: 660px;
}

.hero-lead {
    color: var(--muted);
    font-size: 17px;
    line-height: 1.6;
    max-width: 600px;
    margin: 0 auto 24px;
}

.hero-actions {
    display: flex;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
}

.hero-trust {
    color: var(--muted);
    font-size: 13px;
    margin: 18px 0 0;
}

.btn-secondary {
    display: inline-block;
    background: var(--surface);
    color: var(--text-strong);
    font-weight: 600;
    text-decoration: none;
    padding: 11px 24px;
    border-radius: var(--radius-control);
    border: 1px solid var(--line);
}

.btn-secondary:hover {
    background: var(--surface-2);
    border-color: var(--muted-faint);
}

.btn-cta {
    display: inline-block;
    background: var(--accent);
    color: white;
    font-weight: 600;
    text-decoration: none;
    padding: 11px 24px;
    border-radius: var(--radius-control);
    box-shadow: var(--shadow-card);
}

.btn-cta:hover {
    background: var(--accent-hover);
    box-shadow: var(--shadow-card-hover);
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 12px;
    margin-bottom: 16px;
}

.feature {
    background: var(--surface);
    border: 1px solid var(--line-soft);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    padding: 22px;
}

.feature h2 {
    font-size: 15px;
    margin-bottom: 8px;
}

.feature p {
    color: var(--muted);
    margin: 0;
    line-height: 1.55;
}

.cta-band {
    background: var(--surface);
    border: 1px solid var(--line-soft);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    padding: 36px 32px;
    text-align: center;
}

.cta-band h2 {
    font-size: 21px;
    margin: 0 0 8px;
}

.cta-band p {
    color: var(--muted);
    margin: 0 0 20px;
}

/* ---------------------------------------------------------------------------
   Footer
--------------------------------------------------------------------------- */

.app-footer {
    border-top: 1px solid var(--line-soft);
    color: var(--muted);
    padding: 16px 26px;
    display: flex;
    gap: 16px;
    align-items: center;
}

.app-footer a {
    color: var(--muted);
    text-decoration: none;
}

.app-footer a:hover {
    color: var(--accent);
}

/* ---------------------------------------------------------------------------
   Responsive
--------------------------------------------------------------------------- */

@media (max-width: 980px) {
    .summary-grid, .work-grid, .feature-grid {
        grid-template-columns: 1fr;
    }

    .kpi-grid {
        grid-template-columns: repeat(2, minmax(150px, 1fr));
    }
}

@media (max-width: 860px) {
    .app-body {
        display: block;
    }

    .site-nav {
        width: auto;
        border-right: none;
        border-bottom: 1px solid var(--line-soft);
        padding: 0 20px 10px;
    }

    .app-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }

    .nav-toggle {
        display: block;
    }

    .nav-groups {
        display: none;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        padding-bottom: 10px;
    }

    .nav-toggle-input:checked ~ .nav-groups {
        display: flex;
    }

    .nav-group {
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        padding: 4px 0 0;
    }

    .nav-group + .nav-group {
        border-left: 0;
        border-top: 1px solid var(--line-soft);
        padding-left: 0;
        margin-top: 4px;
    }

    .nav-group-label {
        margin: 6px 0 2px;
    }

    .nav-group a.active {
        border-bottom-color: transparent;
        border-left: 3px solid var(--accent);
    }

    .kpi-grid {
        grid-template-columns: 1fr;
    }
}