:root {
    color-scheme: light;
    --color-bg: #f4f6f8;
    --color-surface: #ffffff;
    --color-surface-muted: #edf1f4;
    --color-raised: #e4e9ed;
    --color-ink: #14202b;
    --color-ink-muted: #50606d;
    --color-ink-faint: #687782;
    --color-border: rgba(20, 40, 60, 0.17);
    --color-border-strong: rgba(20, 40, 60, 0.32);
    --color-primary: #17568c;
    --color-primary-dark: #0e3b63;
    --color-primary-soft: #d8e5f1;
    --color-time: #ed6a1f;
    --color-time-ink: #a73e08;
    --color-time-soft: #fbe1ce;
    --color-success: #2f7d5b;
    --color-success-soft: #dcece5;
    --color-danger: #be3a24;
    --color-danger-soft: #f6dfda;
    --color-agent: #6741d9;
    --color-on-primary: #ffffff;
    --font-body: "Poppins", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --font-mono: "Roboto Mono", "SFMono-Regular", Consolas, monospace;
    --radius-sm: 2px;
    --radius-md: 3px;
    --radius-lg: 4px;
    --shell: 1180px;
}

:root[data-theme="dark"] {
    color-scheme: dark;
    --color-bg: #111820;
    --color-surface: #18222c;
    --color-surface-muted: #202c37;
    --color-raised: #293744;
    --color-ink: #eef3f6;
    --color-ink-muted: #bac6ce;
    --color-ink-faint: #9baab4;
    --color-border: rgba(210, 228, 240, 0.18);
    --color-border-strong: rgba(210, 228, 240, 0.34);
    --color-primary: #75b7ee;
    --color-primary-dark: #a7d2f5;
    --color-primary-soft: #263f55;
    --color-time: #ff8b4c;
    --color-time-ink: #ffab7d;
    --color-time-soft: #51301f;
    --color-success: #72c39e;
    --color-success-soft: #203f33;
    --color-danger: #ee806d;
    --color-danger-soft: #4b2925;
    --color-agent: #a991ff;
    --color-on-primary: #0c1720;
}

* {
    box-sizing: border-box;
}

html {
    min-width: 300px;
    font-size: 16px;
    font-variant-numeric: tabular-nums lining-nums;
    background: var(--color-bg);
}

body {
    min-height: 100vh;
    margin: 0;
    background: var(--color-bg);
    color: var(--color-ink);
    font-family: var(--font-body);
    font-size: 0.9375rem;
    line-height: 1.45;
    text-align: left;
    -webkit-font-smoothing: antialiased;
}

button,
input,
select,
textarea {
    color: inherit;
    font: inherit;
}

button,
a {
    -webkit-tap-highlight-color: transparent;
}

a {
    color: var(--color-primary);
    text-decoration-thickness: 1px;
    text-underline-offset: 0.18em;
}

a:hover {
    color: var(--color-primary-dark);
}

img {
    display: block;
    max-width: 100%;
}

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

h1,
h2,
h3 {
    color: var(--color-ink);
    font-weight: 600;
    letter-spacing: -0.02em;
    text-decoration: none;
}

h1 {
    font-size: clamp(1.65rem, 2.8vw, 2.15rem);
    line-height: 1.15;
}

h2 {
    font-size: 1.12rem;
    line-height: 1.25;
}

small {
    color: var(--color-ink-muted);
}

[hidden] {
    display: none !important;
}

:focus-visible {
    outline: 3px solid var(--color-primary-soft);
    outline-offset: 2px;
}

.shell {
    width: min(100% - 32px, var(--shell));
    margin-inline: auto;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.skip-link {
    position: fixed;
    top: 8px;
    left: 8px;
    z-index: 10000;
    padding: 10px 14px;
    transform: translateY(-160%);
    background: var(--color-surface);
    border: 1px solid var(--color-primary);
    color: var(--color-ink);
}

.skip-link:focus {
    transform: translateY(0);
}

.mono-label {
    color: var(--color-ink-faint);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.08em;
    line-height: 1.25;
}

.context-band {
    min-height: 30px;
    background: var(--color-surface-muted);
    border-bottom: 1px solid var(--color-border);
    color: var(--color-ink-muted);
    font-family: var(--font-mono);
    font-size: 0.72rem;
}

.context-band__inner {
    display: flex;
    align-items: center;
    min-height: 30px;
    gap: 10px;
}

.context-band__label {
    color: var(--color-time-ink);
    font-weight: 500;
    letter-spacing: 0.08em;
}

.app-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
}

.app-header__inner {
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: stretch;
    min-height: 64px;
    gap: 28px;
}

.wordmark {
    display: flex;
    align-items: baseline;
    align-self: center;
    gap: 9px;
    min-height: 44px;
    color: var(--color-ink);
    text-decoration: none;
}

.wordmark:hover {
    color: var(--color-ink);
}

.wordmark__product {
    font-size: 1.12rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    color: var(--color-ink);
}

.wordmark__owner {
    color: var(--color-ink-faint);
    opacity: 0.6;
    font-family: var(--font-mono);
    font-size: 0.65rem;
    letter-spacing: 0.06em;
    font-weight: 400;
    transition: opacity 0.15s ease;
}

.wordmark:hover .wordmark__owner {
    opacity: 0.85;
}

.wordmark__by {
    text-transform: lowercase;
    font-style: italic;
    opacity: 0.85;
    margin-right: 2px;
}

.primary-nav {
    display: flex;
    align-items: stretch;
    gap: 4px;
}

.primary-nav a {
    display: flex;
    align-items: center;
    min-height: 44px;
    padding: 0 14px;
    border-bottom: 2px solid transparent;
    color: var(--color-ink-muted);
    font-size: 0.85rem;
    font-weight: 600;
    text-decoration: none;
}

.primary-nav a:hover {
    background: var(--color-surface-muted);
    color: var(--color-ink);
}

.primary-nav a.is-active {
    border-bottom-color: var(--color-primary);
    color: var(--color-primary-dark);
}

.header-tools {
    display: flex;
    align-items: center;
    gap: 12px;
}

.header-context {
    color: var(--color-ink-faint);
    font-family: var(--font-mono);
    font-size: 0.72rem;
}

.icon-button {
    display: inline-grid;
    place-items: center;
    width: 44px;
    height: 44px;
    padding: 0;
    background: var(--color-surface);
    border: 1px solid var(--color-border-strong);
    border-radius: var(--radius-sm);
    color: var(--color-ink-muted);
    cursor: pointer;
}

.profile-link {
    display: inline-grid;
    place-items: center;
    width: 44px;
    height: 44px;
    border: 1px solid var(--color-border-strong);
    border-radius: var(--radius-sm);
    color: var(--color-ink-muted);
    text-decoration: none;
}

.profile-link:hover,
.profile-link.is-active {
    background: var(--color-primary-soft);
    color: var(--color-primary-dark);
}

.icon-button:hover {
    background: var(--color-surface-muted);
    color: var(--color-ink);
}

.site-main {
    min-height: calc(100vh - 157px);
}

.app-footer {
    border-top: 1px solid var(--color-border);
    color: var(--color-ink-faint);
    font-size: 0.76rem;
}

.app-footer__inner {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    padding-block: 20px;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 120px;
    min-height: 44px;
    padding: 10px 16px;
    border: 1px solid var(--color-primary);
    border-radius: var(--radius-sm);
    background: var(--color-surface);
    color: var(--color-primary-dark);
    font-size: 0.84rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
}

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

.button--primary {
    background: var(--color-primary);
    color: var(--color-on-primary);
}

.button--primary:hover {
    background: var(--color-primary-dark);
    color: var(--color-on-primary);
}

.button_cancel {
    border-color: var(--color-border-strong);
    background: var(--color-surface);
    color: var(--color-ink);
}

fieldset {
    border: 1px solid var(--color-border-strong);
    border-radius: var(--radius-sm);
    background: var(--color-surface);
}

input,
select,
textarea {
    border: 1px solid var(--color-border-strong);
    border-radius: var(--radius-sm);
    background: var(--color-surface);
}

.message-bar {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 10000;
    display: none;
    width: 100%;
    padding: 20px;
    text-align: center;
}

.message-bar.info { background: var(--color-primary); color: var(--color-on-primary); }
.message-bar.warning { background: var(--color-time); color: #14202b; }
.message-bar.alert { background: var(--color-danger); color: #ffffff; }

.fullscreen-overlay {
    position: fixed;
    inset: 0;
    z-index: 9999;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 24px;
    background: rgba(10, 18, 24, 0.86);
}

.fullscreen-overlay img {
    max-height: 90vh;
    border: 1px solid var(--color-border-strong);
}

.dialog {
    max-width: 420px;
    padding: 24px;
    border: 1px solid var(--color-border-strong);
    border-radius: var(--radius-lg);
    background: var(--color-surface);
    color: var(--color-ink);
}

.dialog::backdrop {
    background: rgba(10, 18, 24, 0.78);
}

.dialog-buttons {
    display: flex;
    gap: 8px;
}

@media (max-width: 760px) {
    .shell {
        width: min(100% - 24px, var(--shell));
    }

    .app-header__inner {
        grid-template-columns: 1fr auto;
        min-height: auto;
        gap: 0 12px;
    }

    .wordmark {
        min-height: 58px;
    }

    .primary-nav {
        grid-column: 1 / -1;
        grid-row: 2;
        border-top: 1px solid var(--color-border);
    }

    .primary-nav a {
        min-height: 46px;
        padding-inline: 12px;
    }

    .header-context {
        display: none;
    }

    .app-footer__inner {
        flex-direction: column;
        gap: 6px;
    }
}

@media (max-width: 420px) {
    .context-band__inner {
        align-items: flex-start;
        flex-direction: column;
        gap: 1px;
        padding-block: 6px;
    }

    .wordmark__owner {
        display: none;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}