/* Topmindspace site shell — Material Design 3
   One primary, tonal surfaces, type roles, state layers.
   No navigation rail, no chips, no second accent. */

:root,
[data-theme="light"] {
    --surface: #ffffff;
    --surface-low: #f5f8fc;
    --surface-container: #eef3f9;
    --surface-high: #e6eef7;
    --surface-highest: #dde7f3;
    --primary: #0b57d0;
    --on-primary: #ffffff;
    --primary-container: #d3e3fd;
    --on-primary-container: #041e49;
    --on-surface: #1a1c1e;
    --on-surface-variant: #44474e;
    --outline: #74777f;
    --outline-variant: #c4c7cf;
    --nav: rgba(255, 255, 255, 0.92);
    --focus: #0b57d0;
    color-scheme: light;
}

[data-theme="dark"] {
    --surface: #0f141b;
    --surface-low: #151b24;
    --surface-container: #1c2430;
    --surface-high: #262f3d;
    --surface-highest: #313b4b;
    --primary: #a8c7fa;
    --on-primary: #062e6f;
    --primary-container: #0842a0;
    --on-primary-container: #d3e3fd;
    --on-surface: #e3e8ef;
    --on-surface-variant: #c2c7d0;
    --outline: #8c919a;
    --outline-variant: #44474e;
    --nav: rgba(15, 20, 27, 0.92);
    --focus: #a8c7fa;
    color-scheme: dark;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 80px; }

html[data-pending-lang] body { visibility: hidden; }

body {
    margin: 0;
    background: var(--surface);
    color: var(--on-surface);
    font-family: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    font-weight: 400;
    font-size: 16px;
    line-height: 24px;
    letter-spacing: 0.5px;
    text-rendering: optimizeLegibility;
}

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

a { color: inherit; }

:focus-visible {
    outline: 2px solid var(--focus);
    outline-offset: 2px;
}

::selection {
    background: var(--primary-container);
    color: var(--on-primary-container);
}

.skip-link {
    position: absolute;
    left: 16px;
    top: -48px;
    background: var(--primary);
    color: var(--on-primary);
    padding: 10px 16px;
    border-radius: 20px;
    z-index: 20;
    text-decoration: none;
    font-size: 14px;
    line-height: 20px;
    font-weight: 500;
    letter-spacing: 0.1px;
}

.skip-link:focus { top: 8px; }

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

/* MD3 type roles: Display Medium, Headline Medium, Title Large, Body Large, Label Large */

.display {
    font-size: 45px;
    line-height: 52px;
    font-weight: 400;
    letter-spacing: 0;
}

.headline {
    font-size: 28px;
    line-height: 36px;
    font-weight: 400;
    letter-spacing: 0;
}

.title {
    font-size: 22px;
    line-height: 28px;
    font-weight: 400;
    letter-spacing: 0;
}

.body-lg {
    margin-top: 16px;
    max-width: 42rem;
    color: var(--on-surface);
    font-size: 16px;
    line-height: 24px;
    letter-spacing: 0.5px;
}

.body {
    margin-top: 8px;
    max-width: 42rem;
    color: var(--on-surface-variant);
    font-size: 14px;
    line-height: 20px;
    letter-spacing: 0.25px;
}

.label {
    margin: 0 0 8px;
    font-size: 14px;
    line-height: 20px;
    font-weight: 500;
    letter-spacing: 0.1px;
    color: var(--on-surface-variant);
}

/* Top app bar — 64dp, tonal, not a rail */

.topbar {
    position: sticky;
    top: 0;
    z-index: 10;
    background: var(--surface);
}

.topbar.is-scrolled {
    background: var(--nav);
    backdrop-filter: blur(16px);
    box-shadow: 0 1px 0 color-mix(in srgb, var(--outline) 35%, transparent);
}

.topbar__inner {
    max-width: 1120px;
    margin: 0 auto;
    padding: 0 24px;
    min-height: 64px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.topbar__brand {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    font-size: 16px;
    line-height: 24px;
    font-weight: 500;
    letter-spacing: 0.15px;
    color: var(--on-surface);
    min-height: 48px;
    padding-right: 8px;
}

.topbar__logo {
    width: 32px;
    height: 32px;
    border-radius: 8px;
}

.topbar__links {
    display: flex;
    align-items: center;
    gap: 0;
    margin-left: auto;
}

.topbar__link,
.text-btn,
.topbar__burger {
    position: relative;
    isolation: isolate;
}

.topbar__link::before,
.text-btn::before,
.topbar__burger::before {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: currentColor;
    opacity: 0;
    z-index: -1;
    pointer-events: none;
}

.topbar__link:hover::before,
.text-btn:hover::before,
.topbar__burger:hover::before { opacity: 0.08; }

.topbar__link:focus-visible::before,
.text-btn:focus-visible::before,
.topbar__burger:focus-visible::before,
.topbar__link:active::before,
.text-btn:active::before,
.topbar__burger:active::before { opacity: 0.12; }

.topbar__link {
    text-decoration: none;
    color: var(--on-surface-variant);
    font-size: 14px;
    line-height: 20px;
    font-weight: 500;
    letter-spacing: 0.1px;
    padding: 10px 12px;
    min-height: 40px;
    display: inline-flex;
    align-items: center;
    border-radius: 20px;
}

.topbar__link.is-active {
    color: var(--on-primary-container);
}

.topbar__link.is-active::before {
    background: var(--primary);
    opacity: 0.12;
}

.topbar__actions {
    display: flex;
    align-items: center;
    gap: 0;
}

.text-btn {
    appearance: none;
    border: 0;
    background: transparent;
    color: var(--primary);
    font: inherit;
    font-size: 14px;
    line-height: 20px;
    font-weight: 500;
    letter-spacing: 0.1px;
    padding: 10px 12px;
    min-height: 40px;
    border-radius: 20px;
    cursor: pointer;
}

[data-theme="light"] .when-dark { display: none; }
[data-theme="dark"] .when-light { display: none; }

.topbar__burger {
    display: none;
    width: 48px;
    height: 48px;
    border: 0;
    background: transparent;
    padding: 0;
    cursor: pointer;
    border-radius: 24px;
}

.topbar__burger span {
    position: absolute;
    left: 14px;
    right: 14px;
    height: 2px;
    border-radius: 2px;
    background: var(--on-surface);
    transition: transform 0.2s cubic-bezier(0.2, 0, 0, 1), top 0.2s cubic-bezier(0.2, 0, 0, 1);
}

.topbar__burger span:first-child { top: 20px; }
.topbar__burger span:last-child { top: 27px; }

.nav.is-open .topbar__burger span:first-child { top: 23px; transform: rotate(45deg); }
.nav.is-open .topbar__burger span:last-child { top: 23px; transform: rotate(-45deg); }

/* Layout */

.hero {
    max-width: 1120px;
    margin: 0 auto;
    padding: 48px 24px 40px;
    display: grid;
    grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
    gap: 40px;
    align-items: center;
}

.hero__shot {
    margin: 0;
    background: var(--surface-container);
    border-radius: 28px;
    padding: 8px;
}

.hero__shot img {
    width: 100%;
    border-radius: 20px;
}

.band { background: var(--surface-low); }

.band__inner {
    max-width: 1120px;
    margin: 0 auto;
    padding: 48px 24px 64px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.band__head { display: flex; flex-direction: column; gap: 8px; }

.band__head .body { margin-top: 0; max-width: 40rem; }

.surface {
    background: var(--surface-container);
    border-radius: 28px;
    padding: 24px;
    display: grid;
    grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
    gap: 24px;
    align-items: start;
}

.surface:has(.surface__shot) {
    grid-template-columns: minmax(240px, 0.78fr) minmax(0, 1.22fr);
}

.surface__shot {
    grid-row: 1 / span 2;
    margin: 0;
    border-radius: 16px;
    overflow: hidden;
    background: var(--surface-highest);
    align-self: stretch;
}

.surface__shot img {
    width: 100%;
    height: 100%;
    min-height: 240px;
    object-fit: cover;
    object-position: top center;
}

.surface__shot--cover img {
    height: auto;
    min-height: 0;
    object-fit: contain;
    object-position: center;
}

.page {
    max-width: 1120px;
    margin: 0 auto;
    padding: 48px 24px 64px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.page__intro { max-width: 42rem; }

.page section {
    display: flex;
    flex-direction: column;
    gap: 16px;
}


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

.shots--row {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.shot {
    margin: 0;
    background: var(--surface-container);
    border-radius: 28px;
    overflow: hidden;
}

.shot img {
    width: 100%;
    aspect-ratio: 16 / 9;
    object-fit: cover;
}

.shot figcaption {
    padding: 12px 16px 16px;
    color: var(--on-surface-variant);
    font-size: 14px;
    line-height: 20px;
    letter-spacing: 0.25px;
}

.install__pre {
    margin: 0;
    background: var(--surface-highest);
    border-radius: 16px;
    padding: 16px;
    overflow-x: auto;
}

.install__pre code {
    font-family: "JetBrains Mono", ui-monospace, Menlo, Consolas, monospace;
    font-size: 13px;
    line-height: 22px;
    font-weight: 400;
    letter-spacing: 0;
    color: var(--on-surface);
    white-space: pre;
}

.install .text-btn { margin-top: 4px; }

.links {
    display: flex;
    flex-wrap: wrap;
    gap: 4px 16px;
    margin-top: 16px;
}

.links a,
.footer__nav a {
    color: var(--primary);
    text-decoration: none;
    font-size: 14px;
    line-height: 20px;
    font-weight: 500;
    letter-spacing: 0.1px;
}

.links a:hover,
.footer__nav a:hover { text-decoration: underline; text-underline-offset: 3px; }

.hero .install { margin-top: 24px; }

.footer { background: var(--surface); }

.footer__inner {
    max-width: 1120px;
    margin: 0 auto;
    padding: 24px 24px 32px;
    display: flex;
    flex-wrap: wrap;
    gap: 12px 24px;
    align-items: baseline;
}

.footer__name {
    font-size: 16px;
    line-height: 24px;
    font-weight: 500;
    letter-spacing: 0.15px;
}

.footer__nav {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 16px;
}

.footer__copy {
    margin-left: auto;
    color: var(--on-surface-variant);
    font-size: 12px;
    line-height: 16px;
    letter-spacing: 0.4px;
}

.toast {
    position: fixed;
    left: 50%;
    bottom: 24px;
    transform: translate(-50%, 8px);
    background: var(--primary);
    color: var(--on-primary);
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 14px;
    line-height: 20px;
    font-weight: 500;
    letter-spacing: 0.1px;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s cubic-bezier(0.2, 0, 0, 1), transform 0.2s cubic-bezier(0.2, 0, 0, 1);
}

.toast.is-visible {
    opacity: 1;
    transform: translate(-50%, 0);
}

@media (max-width: 960px) {
    .display { font-size: 36px; line-height: 44px; }

    .hero {
        grid-template-columns: 1fr;
        gap: 24px;
        padding: 32px 16px 24px;
    }

    .band__inner,
    .page { padding: 32px 16px 48px; }

    .surface {
        grid-template-columns: 1fr;
        gap: 16px;
        border-radius: 24px;
    }

    .surface:has(.surface__shot) { grid-template-columns: 1fr; }

    .surface__shot {
        grid-row: auto;
        grid-column: 1;
    }

    .surface__shot img { height: auto; min-height: 0; aspect-ratio: 16 / 9; }
    .surface__shot--cover img { aspect-ratio: auto; }

    .shots--row { grid-template-columns: 1fr; }

    .topbar__inner { padding: 0 8px 0 16px; }
    .footer__inner { padding-left: 16px; padding-right: 16px; }
    .footer__copy { margin-left: 0; }
}

@media (max-width: 760px) {
    .topbar__burger { display: block; }

    .topbar__links {
        display: none;
        position: absolute;
        left: 12px;
        right: 12px;
        top: calc(100% - 4px);
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        padding: 8px;
        background: var(--surface-container);
        border-radius: 16px;
        margin-left: 0;
    }

    .nav.is-open .topbar__links { display: flex; }

    .topbar__link {
        min-height: 48px;
        border-radius: 12px;
    }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    .toast,
    .topbar__burger span { transition: none; }
}