:root {
    color-scheme: light dark;
    --bg: #f3f6fb;
    --bg-accent: radial-gradient(circle at top right, rgba(17, 132, 255, 0.12), transparent 30%), linear-gradient(180deg, #f8fbff 0%, #eef3f9 100%);
    --surface: rgba(255, 255, 255, 0.88);
    --surface-strong: #ffffff;
    --surface-soft: #edf3fb;
    --text: #112034;
    --muted: #5f7087;
    --border: rgba(17, 32, 52, 0.1);
    --primary: #0077ff;
    --primary-strong: #005ecc;
    --success: #117a40;
    --error: #b42318;
    --shadow: 0 18px 40px rgba(17, 32, 52, 0.09);
    --radius: 22px;
}

body.dark-mode {
    --bg: #0d1522;
    --bg-accent: radial-gradient(circle at top right, rgba(0, 119, 255, 0.22), transparent 28%), linear-gradient(180deg, #0f1727 0%, #09101a 100%);
    --surface: rgba(16, 24, 38, 0.84);
    --surface-strong: #172233;
    --surface-soft: #131f31;
    --text: #f1f6ff;
    --muted: #95a6c1;
    --border: rgba(255, 255, 255, 0.09);
    --primary: #5aa2ff;
    --primary-strong: #89beff;
    --success: #4dd28a;
    --error: #ff8577;
    --shadow: 0 22px 50px rgba(0, 0, 0, 0.28);
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    min-height: 100%;
    font-family: "Segoe UI", Tahoma, Arial, sans-serif;
    background: var(--bg-accent);
    color: var(--text);
}

body {
    padding: 20px 14px 40px;
}

.page-shell {
    width: min(100%, 980px);
    margin: 0 auto;
}

.topbar,
.status-grid,
.cards-grid,
.control-row,
.code-line,
.inline-actions,
.section-heading {
    display: flex;
    gap: 14px;
}

.topbar,
.status-grid,
.cards-grid {
    align-items: stretch;
}

.topbar,
.card,
.sub-card {
    backdrop-filter: blur(16px);
}

.topbar {
    justify-content: space-between;
    margin-bottom: 18px;
    flex-wrap: wrap;
}

.eyebrow {
    margin: 0 0 8px;
    color: var(--primary);
    font-weight: 700;
    letter-spacing: 0.04em;
}

h1,
h2,
h3,
p {
    margin-top: 0;
}

h1 {
    font-size: clamp(1.7rem, 4vw, 2.4rem);
    margin-bottom: 10px;
}

h2 {
    font-size: 1.15rem;
    margin-bottom: 12px;
}

.muted,
.meta-list,
.snippet {
    color: var(--muted);
}

.card,
.sub-card,
.alert {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.card {
    padding: 18px;
    margin-bottom: 16px;
}

.sub-card {
    padding: 14px;
}

.status-grid,
.cards-grid {
    flex-direction: column;
}

.stack {
    display: grid;
    gap: 14px;
}

label {
    display: grid;
    gap: 8px;
    font-weight: 600;
}

input,
select,
button,
.btn {
    font: inherit;
}

input,
select {
    width: 100%;
    border: 1px solid var(--border);
    background: var(--surface-strong);
    color: var(--text);
    border-radius: 16px;
    padding: 13px 14px;
    outline: none;
}

input:focus,
select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(0, 119, 255, 0.12);
}

.checkbox-row {
    grid-template-columns: auto 1fr;
    align-items: center;
}

.checkbox-row input {
    width: auto;
}

.btn,
button {
    border: 0;
    border-radius: 16px;
    cursor: pointer;
    text-decoration: none;
    display: inline-flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    transition: transform 0.15s ease, opacity 0.15s ease, background 0.15s ease;
}

.btn:hover,
button:hover {
    transform: translateY(-1px);
}

.btn-primary {
    background: var(--primary);
    color: white;
}

.btn-primary:hover {
    background: var(--primary-strong);
}

.btn-secondary {
    background: var(--surface-soft);
    color: var(--text);
}

.btn-light,
.theme-toggle {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text);
}

.theme-toggle {
    min-height: 46px;
}

.meta-list,
.check-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    gap: 10px;
}

.check-list li,
.meta-list li {
    display: flex;
    justify-content: space-between;
    gap: 10px;
    align-items: center;
}

.check-list li.ok strong {
    color: var(--success);
}

.check-list li.fail strong {
    color: var(--error);
}

.alert {
    padding: 14px 16px;
    margin-bottom: 16px;
}

.alert-success {
    border-color: rgba(17, 122, 64, 0.22);
}

.alert-error {
    border-color: rgba(180, 35, 24, 0.22);
}

.alert-info {
    border-color: rgba(0, 119, 255, 0.22);
}

.copy-box {
    display: grid;
    gap: 10px;
    margin-bottom: 12px;
}

.code-card {
    position: relative;
    overflow: hidden;
}

.code-card::before {
    content: "";
    position: absolute;
    inset: 0 auto auto 0;
    width: 100%;
    height: 5px;
    background: linear-gradient(90deg, var(--primary), transparent);
}

.code-line,
.control-row,
.inline-actions,
.section-heading {
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

.code-value {
    font-size: clamp(1.9rem, 6vw, 2.8rem);
    font-weight: 800;
    letter-spacing: 0.12em;
    font-variant-numeric: tabular-nums;
}

.snippet {
    line-height: 1.7;
    margin-bottom: 0;
}

.badge {
    background: var(--surface-soft);
    color: var(--text);
    border-radius: 999px;
    padding: 6px 12px;
    font-weight: 700;
}

.empty-state {
    text-align: center;
    padding: 30px 20px;
}

.auth-card,
.controls-card,
.success-panel {
    max-width: 720px;
}

@media (min-width: 760px) {
    body {
        padding: 28px 22px 50px;
    }

    .status-grid {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .cards-grid {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}