:root {
    color-scheme: light;
    --bg: #f5f7fb;
    --bg-elevated: #ffffff;
    --bg-muted: #eef2f8;
    --text: #14213d;
    --text-muted: #5b6780;
    --border: #dbe2ee;
    --primary: #2563eb;
    --primary-strong: #1d4ed8;
    --primary-soft: #e3edff;
    --success: #137a4b;
    --success-soft: #e2f6ec;
    --danger: #b42318;
    --danger-soft: #fee9e7;
    --warning: #9a6700;
    --warning-soft: #fff4d6;
    --shadow: 0 18px 40px rgba(20, 33, 61, 0.08);
    --radius: 16px;
    --radius-sm: 10px;
}

html[data-theme="dark"] {
    color-scheme: dark;
    --bg: #0b1220;
    --bg-elevated: #131c2e;
    --bg-muted: #1a2538;
    --text: #e8eefc;
    --text-muted: #98a5bd;
    --border: #2a3953;
    --primary: #6ea0ff;
    --primary-strong: #8ab4ff;
    --primary-soft: #1d2d4d;
    --success: #66d6a2;
    --success-soft: #153528;
    --danger: #ff9b91;
    --danger-soft: #3a1d1b;
    --warning: #f4c35d;
    --warning-soft: #3a2f14;
    --shadow: 0 18px 40px rgba(0, 0, 0, 0.35);
}

@media (prefers-color-scheme: dark) {
    html[data-theme="auto"] {
        color-scheme: dark;
        --bg: #0b1220;
        --bg-elevated: #131c2e;
        --bg-muted: #1a2538;
        --text: #e8eefc;
        --text-muted: #98a5bd;
        --border: #2a3953;
        --primary: #6ea0ff;
        --primary-strong: #8ab4ff;
        --primary-soft: #1d2d4d;
        --success: #66d6a2;
        --success-soft: #153528;
        --danger: #ff9b91;
        --danger-soft: #3a1d1b;
        --warning: #f4c35d;
        --warning-soft: #3a2f14;
        --shadow: 0 18px 40px rgba(0, 0, 0, 0.35);
    }
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    min-height: 100%;
}

body {
    background: var(--bg);
    color: var(--text);
    font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-size: 16px;
    line-height: 1.55;
    display: flex;
    min-height: 100vh;
    flex-direction: column;
}

a {
    color: var(--primary);
    text-decoration: none;
}

a:hover {
    color: var(--primary-strong);
    text-decoration: underline;
}

h1,
h2,
h3 {
    line-height: 1.2;
    margin: 0 0 0.6rem;
    letter-spacing: -0.02em;
}

h1 {
    font-size: clamp(1.55rem, 3vw, 2.1rem);
}

h2 {
    font-size: 1.2rem;
}

p {
    margin: 0 0 0.9rem;
}

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

code,
pre {
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 0.9em;
}

pre {
    background: var(--bg-muted);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 1rem;
    overflow: auto;
    white-space: pre-wrap;
    word-break: break-word;
}

.topbar {
    align-items: center;
    background: color-mix(in srgb, var(--bg-elevated) 88%, transparent);
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(14px);
    display: flex;
    gap: 1.25rem;
    padding: 0.85rem clamp(1rem, 4vw, 3rem);
    position: sticky;
    top: 0;
    z-index: 20;
}

.brand {
    align-items: center;
    color: var(--text);
    display: inline-flex;
    font-weight: 700;
    gap: 0.65rem;
    white-space: nowrap;
}

.brand:hover {
    color: var(--text);
    text-decoration: none;
}

.brand-mark {
    align-items: center;
    background: linear-gradient(135deg, var(--primary), #7c3aed);
    border-radius: 9px;
    color: #fff;
    display: inline-flex;
    font-size: 0.72rem;
    height: 34px;
    justify-content: center;
    width: 34px;
}

.main-nav {
    display: flex;
    flex: 1;
    gap: 0.2rem;
    overflow-x: auto;
}

.main-nav a {
    border-radius: 999px;
    color: var(--text-muted);
    font-size: 0.92rem;
    font-weight: 600;
    padding: 0.45rem 0.8rem;
    white-space: nowrap;
}

.main-nav a:hover,
.main-nav a.active {
    background: var(--primary-soft);
    color: var(--primary-strong);
    text-decoration: none;
}

.topbar-actions {
    align-items: center;
    display: flex;
    gap: 0.4rem;
}

.icon-button {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text);
}

.page {
    flex: 1;
    margin: 0 auto;
    max-width: 1180px;
    padding: 2rem clamp(1rem, 4vw, 3rem) 3rem;
    width: 100%;
}

.page-centered {
    align-items: center;
    display: flex;
    flex-direction: column;
    justify-content: center;
    max-width: 560px;
    min-height: calc(100vh - 90px);
}

.page-header {
    align-items: flex-end;
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: space-between;
    margin-bottom: 1.5rem;
}

.page-header p {
    color: var(--text-muted);
    margin: 0;
    max-width: 65ch;
}

.footer {
    color: var(--text-muted);
    display: flex;
    flex-wrap: wrap;
    font-size: 0.78rem;
    gap: 0.4rem 1rem;
    justify-content: space-between;
    padding: 1.25rem clamp(1rem, 4vw, 3rem);
}

.card {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: clamp(1.1rem, 2.5vw, 1.7rem);
}

.card + .card {
    margin-top: 1rem;
}

.card-grid {
    display: grid;
    gap: 1rem;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
}

.tile {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    padding: 1.2rem;
}

.tile-top {
    align-items: center;
    display: flex;
    gap: 0.7rem;
}

.tile-icon {
    align-items: center;
    background: var(--primary-soft);
    border-radius: 12px;
    color: var(--primary-strong);
    display: inline-flex;
    flex: 0 0 auto;
    font-size: 1.2rem;
    font-weight: 700;
    height: 44px;
    justify-content: center;
    width: 44px;
}

.tile h2 {
    font-size: 1.05rem;
    margin: 0;
}

.tile p {
    color: var(--text-muted);
    flex: 1;
    margin: 0;
}

.tile-url {
    color: var(--text-muted);
    font-size: 0.78rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.tile-actions {
    display: flex;
    gap: 0.5rem;
}

.button {
    align-items: center;
    background: var(--primary);
    border: 1px solid transparent;
    border-radius: 10px;
    color: #fff;
    cursor: pointer;
    display: inline-flex;
    font: inherit;
    font-size: 0.9rem;
    font-weight: 650;
    gap: 0.4rem;
    justify-content: center;
    padding: 0.58rem 0.95rem;
    text-decoration: none;
    transition: background 0.15s ease, border-color 0.15s ease, transform 0.15s ease;
}

.button:hover {
    background: var(--primary-strong);
    color: #fff;
    text-decoration: none;
    transform: translateY(-1px);
}

.button.secondary {
    background: var(--bg-muted);
    border-color: var(--border);
    color: var(--text);
}

.button.secondary:hover {
    background: var(--primary-soft);
    color: var(--primary-strong);
}

.button.danger {
    background: var(--danger);
}

.button.ghost {
    background: transparent;
    border-color: var(--border);
    color: var(--text);
}

.button.small {
    font-size: 0.8rem;
    padding: 0.4rem 0.7rem;
}

.button:disabled {
    cursor: not-allowed;
    opacity: 0.6;
    transform: none;
}

.inline-form {
    display: inline-flex;
    margin: 0;
}

.actions {
    align-items: center;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.alert {
    border: 1px solid var(--border);
    border-left: 4px solid var(--primary);
    border-radius: var(--radius-sm);
    margin-bottom: 1rem;
    padding: 0.85rem 1rem;
}

.alert-success {
    background: var(--success-soft);
    border-left-color: var(--success);
    color: var(--success);
}

.alert-danger {
    background: var(--danger-soft);
    border-left-color: var(--danger);
    color: var(--danger);
}

.alert-warning {
    background: var(--warning-soft);
    border-left-color: var(--warning);
    color: var(--warning);
}

.alert-info {
    background: var(--primary-soft);
    border-left-color: var(--primary);
    color: var(--primary-strong);
}

.badge {
    border-radius: 999px;
    display: inline-flex;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    padding: 0.22rem 0.55rem;
    text-transform: uppercase;
}

.badge-success {
    background: var(--success-soft);
    color: var(--success);
}

.badge-danger {
    background: var(--danger-soft);
    color: var(--danger);
}

.badge-muted {
    background: var(--bg-muted);
    color: var(--text-muted);
}

.badge-warning {
    background: var(--warning-soft);
    color: var(--warning);
}

.table-wrap {
    overflow-x: auto;
}

table {
    border-collapse: collapse;
    width: 100%;
}

th,
td {
    border-bottom: 1px solid var(--border);
    padding: 0.7rem 0.6rem;
    text-align: left;
    vertical-align: top;
}

th {
    color: var(--text-muted);
    font-size: 0.76rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

tbody tr:last-child td {
    border-bottom: 0;
}

.field {
    margin-bottom: 1rem;
}

.field label,
.form label {
    display: block;
    font-weight: 650;
    margin-bottom: 0.35rem;
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
input[type="url"],
textarea,
select {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    color: var(--text);
    font: inherit;
    padding: 0.62rem 0.75rem;
    width: 100%;
}

input:focus,
textarea:focus,
select:focus,
button:focus-visible,
a:focus-visible {
    outline: 3px solid color-mix(in srgb, var(--primary) 40%, transparent);
    outline-offset: 2px;
}

.checkbox-row {
    align-items: center;
    display: flex;
    gap: 0.55rem;
}

.checkbox-row input {
    height: 1.05rem;
    width: 1.05rem;
}

.form-errors,
.form-error-message {
    color: var(--danger);
    font-size: 0.85rem;
}

.form-help {
    color: var(--text-muted);
    display: block;
    font-size: 0.8rem;
    margin-top: 0.3rem;
}

.login-card {
    width: 100%;
}

.login-card .brand-mark {
    height: 46px;
    width: 46px;
}

.login-head {
    margin-bottom: 1.4rem;
    text-align: center;
}

.login-head p {
    color: var(--text-muted);
    margin: 0;
}

.qr-box {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    display: inline-flex;
    max-width: 260px;
    padding: 0.75rem;
}

.qr-box svg,
.qr-box img {
    height: auto;
    width: 100%;
}

.clipboard-helper {
    height: 1px;
    left: -9999px;
    opacity: 0;
    overflow: hidden;
    position: fixed;
    top: auto;
    width: 1px;
}

.secret {
    background: var(--bg-muted);
    border: 1px dashed var(--border);
    border-radius: var(--radius-sm);
    display: block;
    font-size: 0.95rem;
    letter-spacing: 0.12em;
    overflow-wrap: anywhere;
    padding: 0.7rem;
    text-align: center;
}

.code-list {
    display: grid;
    gap: 0.6rem;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    list-style: none;
    margin: 1rem 0;
    padding: 0;
}

.code-list li {
    background: var(--bg-muted);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    padding: 0.65rem;
    text-align: center;
}

.notice {
    background: var(--bg-muted);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    padding: 0.85rem 1rem;
}

.notice strong {
    color: var(--text);
}

.stat-grid {
    display: grid;
    gap: 0.8rem;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
}

.stat {
    background: var(--bg-muted);
    border-radius: var(--radius-sm);
    padding: 0.8rem 1rem;
}

.stat-label {
    color: var(--text-muted);
    display: block;
    font-size: 0.76rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.stat-value {
    font-size: 1.15rem;
    font-weight: 700;
}

.steps {
    list-style: none;
    margin: 0;
    padding: 0;
}

.steps li {
    align-items: flex-start;
    border-bottom: 1px solid var(--border);
    display: flex;
    gap: 0.7rem;
    padding: 0.55rem 0;
}

.steps li:last-child {
    border-bottom: 0;
}

.step-icon {
    flex: 0 0 auto;
    font-weight: 700;
}

.step-ok {
    color: var(--success);
}

.step-fail {
    color: var(--danger);
}

.split {
    display: grid;
    gap: 1rem;
    grid-template-columns: minmax(0, 2fr) minmax(260px, 1fr);
}

@media (max-width: 900px) {
    .topbar {
        align-items: flex-start;
        flex-wrap: wrap;
        padding-bottom: 0.7rem;
    }

    .main-nav {
        flex-basis: 100%;
        order: 3;
    }

    .topbar-actions {
        margin-left: auto;
    }

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

@media (max-width: 640px) {
    .brand span:last-child {
        display: none;
    }

    .page {
        padding-top: 1.2rem;
    }

    .main-nav a {
        padding: 0.4rem 0.6rem;
    }

    .card,
    .tile {
        padding: 1rem;
    }
}

.mt-1 {
    margin-top: 1rem;
}

.mt-2 {
    margin-top: 2rem;
}

.mb-1 {
    margin-bottom: 1rem;
}

.text-center {
    text-align: center;
}

.wrap-anywhere {
    overflow-wrap: anywhere;
}

.plain-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.list-row {
    border-bottom: 1px solid var(--border);
    padding: 0.55rem 0;
}

.list-row:last-child {
    border-bottom: 0;
}

.hidden-copy {
    height: 1px;
    left: -9999px;
    overflow: hidden;
    position: absolute;
    top: auto;
    width: 1px;
}