@layer reset, tokens, base, layout, components, utilities;

@layer reset {
    *,
    *::before,
    *::after {
        box-sizing: border-box;
    }

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

    ul {
        padding: 0;
    }

    img, svg {
        display: block;
        max-inline-size: 100%;
        block-size: auto;
    }

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

@layer tokens {
    :root {
        color-scheme: light dark;

        /* Two deliberately paired palettes; the system preference is the default. */
        --color-bg: light-dark(#f5f4ed, #06141b);
        --color-bg-deep: light-dark(#e8efeb, #030e15);
        --color-surface: light-dark(#fcfcf7, #0b2028);
        --color-surface-raised: light-dark(#edf3ef, #102b34);
        --color-text: light-dark(#163039, #e8eeee);
        --color-heading: light-dark(#09232d, #f1ead1);
        --color-muted: light-dark(#526970, #a6b9bd);
        --color-accent: light-dark(#087f82, #22c9c3);
        --color-accent-bright: light-dark(#0d9fa0, #45e0d5);
        --color-accent-strong: light-dark(#066367, #45e0d5);
        --color-on-accent: light-dark(#ffffff, #042027);
        --color-warm: light-dark(#806023, #d7c490);
        --color-border: light-dark(#c8d6d2, #24444c);
        --color-control-border: light-dark(#728983, #597b84);
        --color-focus: light-dark(#086eab, #8eeae1);
        --color-header: light-dark(rgb(237 243 239 / 96%), rgb(6 20 27 / 96%));
        --color-atmosphere: light-dark(rgb(8 127 130 / 8%), rgb(34 201 195 / 7%));
        --shadow-surface: 0 0.5rem 2rem light-dark(rgb(9 35 45 / 4%), rgb(0 0 0 / 8%));

        --font-reading: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
        --font-interface: var(--font-reading);
        --font-code: ui-monospace, "SFMono-Regular", Consolas, monospace;
        --content-max: 76rem;
        --reading-max: 68ch;
        --gutter: clamp(1rem, 4vw, 3rem);
        --space-section: clamp(3rem, 6vw, 5.5rem);
        --space-panel: clamp(1.25rem, 4vw, 2.5rem);
        --radius-small: 0.4rem;
        --radius-medium: 0.9rem;
        --header-height: 7rem;
        --transition-fast: 160ms;
    }

    :root[data-theme="light"] {
        color-scheme: light;
    }

    :root[data-theme="dark"] {
        color-scheme: dark;
    }
}

@layer base {
    html {
        scroll-padding-block-start: 1.5rem;
    }

    body {
        min-block-size: 100vh;
        display: flex;
        flex-direction: column;
        overflow-wrap: break-word;
        background: var(--color-bg);
        color: var(--color-text);
        font-family: var(--font-reading);
        font-size: clamp(1rem, 0.96rem + 0.2vw, 1.1rem);
        line-height: 1.75;
    }

    main {
        flex: 1;
        min-inline-size: 0;
    }

    h1, h2, h3 {
        color: var(--color-heading);
        font-weight: 650;
        text-wrap: balance;
    }

    h1 {
        max-inline-size: 18ch;
        font-size: clamp(2.5rem, 6.5vw, 5rem);
        letter-spacing: -0.05em;
        line-height: 1.06;
    }

    h2 {
        max-inline-size: 24ch;
        font-size: clamp(1.6rem, 3.2vw, 2.65rem);
        letter-spacing: -0.035em;
        line-height: 1.18;
    }

    h3 {
        font-size: clamp(1.15rem, 2vw, 1.4rem);
        letter-spacing: -0.015em;
        line-height: 1.35;
    }

    p {
        max-inline-size: var(--reading-max);
        text-wrap: pretty;
    }

    a {
        color: var(--color-accent-strong);
        text-decoration-line: underline;
        text-decoration-thickness: 0.08em;
        text-underline-offset: 0.2em;
    }

    a:hover {
        text-decoration-thickness: 0.14em;
    }

    a:active {
        color: var(--color-accent);
    }

    :focus-visible {
        outline: 0.2rem solid var(--color-focus);
        outline-offset: 0.25rem;
    }

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

    address {
        font-style: normal;
    }

    code {
        font-family: var(--font-code);
        font-size: 0.9em;
    }

    input[type="checkbox"] {
        inline-size: 1.25rem;
        block-size: 1.25rem;
        margin: 0.25rem 0 0;
        accent-color: var(--color-accent);
        cursor: pointer;
    }
}

@layer layout {
    .header-inner, .page-shell, .footer-inner {
        inline-size: min(100% - (2 * var(--gutter)), var(--content-max));
        margin-inline: auto;
    }

    .site-header {
        z-index: 5;
        border-block-end: 1px solid var(--color-border);
        background: var(--color-header);
    }

    .header-inner {
        display: grid;
        grid-template-columns: auto minmax(0, 1fr);
        align-items: center;
        gap: 0.5rem 1rem;
        padding-block: 0.75rem;
    }

    .header-tools {
        display: contents;
    }

    .primary-nav {
        grid-column: 1 / -1;
        grid-row: 2;
        display: flex;
        flex-wrap: wrap;
        align-items: center;
        justify-content: space-between;
        gap: 0.25rem 1rem;
        border-block-start: 1px solid var(--color-border);
        padding-block-start: 0.4rem;
    }

    .theme-control {
        grid-column: 2;
        grid-row: 1;
        justify-self: end;
        display: flex;
        align-items: center;
        gap: 0.65rem;
    }

    @media (max-width: 47.999rem) {
        .header-inner {
            gap-block: 0.25rem;
            padding-block: 0.5rem;
        }

        .primary-nav {
            padding-block-start: 0.2rem;
        }
    }

    .page-shell {
        padding-block: var(--space-section);
    }

    .narrow-shell {
        max-inline-size: 52rem;
        overflow-wrap: anywhere;
    }

    .hero {
        display: grid;
        grid-template-columns: minmax(0, 1fr);
        align-items: center;
        gap: 2.5rem;
        padding-block-end: 1.25rem;
        border-block-end: 1px solid var(--color-border);
    }

    .content-grid {
        display: grid;
        gap: 2.5rem clamp(2rem, 6vw, 5rem);
        padding-block: var(--space-section);
    }

    .content-section {
        display: grid;
        align-content: start;
        gap: 1.15rem;
        min-inline-size: 0;
    }

    .content-section + .content-section {
        padding-block-start: 2.5rem;
        border-block-start: 1px solid var(--color-border);
    }

    .more-section {
        display: grid;
        gap: 1.5rem clamp(2rem, 6vw, 5rem);
        align-items: center;
        padding: var(--space-panel);
        border: 1px solid var(--color-border);
        border-inline-start: 3px solid var(--color-accent);
        border-radius: var(--radius-medium);
        background: var(--color-surface-raised);
        box-shadow: var(--shadow-surface);
    }

    .guest-invitation {
        margin-block-start: var(--space-section);
    }

    .project-teaser {
        display: grid;
        gap: 1.5rem clamp(2rem, 6vw, 5rem);
        margin-block-start: var(--space-section);
        padding-block-start: 2rem;
        border-block-start: 1px solid var(--color-border);
    }

    .project-teaser-copy {
        display: grid;
        gap: 1rem;
    }

    .site-footer {
        border-block-start: 1px solid var(--color-border);
        background: var(--color-bg-deep);
    }

    .footer-inner {
        display: grid;
        gap: 1.5rem 3rem;
        padding-block: 2rem;
    }

    .footer-nav {
        display: flex;
        flex-wrap: wrap;
        gap: 0.4rem 1.5rem;
    }

    .page-intro {
        display: grid;
        gap: 1.25rem;
        padding-block-end: 2.5rem;
        border-block-end: 1px solid var(--color-border);
    }

    .prose {
        display: grid;
        grid-template-columns: minmax(0, 1fr);
        gap: clamp(2.5rem, 5vw, 4rem);
        padding-block-start: 2.5rem;
    }

    .prose section {
        display: grid;
        gap: 1.15rem;
        min-inline-size: 0;
    }

    .legal-page {
        display: grid;
        grid-template-columns: minmax(0, 1fr);
        gap: 2.5rem;
    }

    .legal-page .page-intro h1 {
        max-inline-size: 24ch;
        font-size: clamp(2rem, 4.5vw, 3.6rem);
    }

    .guest-page .page-intro h1 {
        max-inline-size: 20ch;
        font-size: clamp(2.25rem, 5vw, 4rem);
    }

    .error-content {
        display: grid;
        align-content: center;
        gap: 1.5rem;
        min-block-size: min(36rem, 65vh);
    }

    @media (min-width: 48rem) {
        .header-inner {
            display: flex;
            justify-content: space-between;
        }

        .header-tools {
            display: flex;
            align-items: center;
            gap: 1.5rem;
        }

        .primary-nav {
            gap: 1.5rem;
            padding: 0;
            border: 0;
        }

        .hero {
            grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.9fr);
            column-gap: clamp(2rem, 5vw, 4rem);
        }

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

        .content-section + .content-section {
            padding-block-start: 0;
            border-block-start: 0;
        }

        .more-section, .project-teaser {
            grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
        }

        .footer-inner {
            grid-template-columns: auto minmax(0, 1fr);
            align-items: center;
        }

        .footer-nav {
            justify-content: end;
        }
    }

    @media (min-width: 64rem) {
        html {
            scroll-padding-block-start: calc(var(--header-height) + 1.5rem);
        }

        .site-header {
            position: sticky;
            inset-block-start: 0;
            backdrop-filter: blur(8px);
        }

        .header-tools {
            gap: 2rem;
        }
    }
}

@layer components {
    .skip-link {
        position: fixed;
        z-index: 10;
        inset-block-start: 0.75rem;
        inset-inline-start: 0.75rem;
        padding: 0.7rem 1rem;
        border-radius: var(--radius-small);
        transform: translateY(-200%);
        background: var(--color-text);
        color: var(--color-bg);
        font-size: 0.9rem;
    }

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

    .site-brand {
        display: block;
        flex: 0 0 auto;
        inline-size: 3.25rem;
        border-radius: var(--radius-small);
    }

    .site-brand picture, .site-brand img {
        display: block;
        inline-size: 100%;
        block-size: auto;
        aspect-ratio: 1;
        object-fit: contain;
    }

    .primary-nav a, .footer-nav a {
        min-block-size: 2.75rem;
        display: inline-flex;
        align-items: center;
        color: var(--color-text);
        font-size: 0.9rem;
        font-weight: 550;
        text-decoration: none;
    }

    .primary-nav a:hover, .footer-nav a:hover {
        color: var(--color-accent-strong);
        text-decoration: underline;
        text-underline-offset: 0.4rem;
    }

    :where(.primary-nav a, .footer-nav a)[aria-current="page"] {
        text-decoration-line: underline;
        text-decoration-color: var(--color-accent);
        text-decoration-thickness: 0.15rem;
        text-underline-offset: 0.4rem;
    }

    .theme-control label {
        color: var(--color-muted);
        font-size: 0.75rem;
    }

    .theme-control select {
        min-block-size: 2.75rem;
        max-inline-size: 8rem;
        padding-inline: 0.55rem;
        border: 1px solid var(--color-border);
        border-radius: var(--radius-small);
        background-color: transparent;
        color: var(--color-text);
        font-size: 0.78rem;
        cursor: pointer;
    }

    .theme-control select:hover:enabled {
        border-color: var(--color-control-border);
        background-color: var(--color-surface-raised);
    }

    .theme-control select:disabled {
        color: var(--color-muted);
        cursor: not-allowed;
    }

    .eyebrow, .section-label, .status-label, .footer-name {
        color: var(--color-muted);
        font-size: 0.75rem;
        font-weight: 650;
        letter-spacing: 0.11em;
        line-height: 1.6;
        text-transform: uppercase;
    }

    .eyebrow {
        display: flex;
        align-items: center;
        gap: 0.75rem;
        color: var(--color-accent-strong);
    }

    .eyebrow::before {
        content: "";
        flex: 0 0 1.75rem;
        block-size: 2px;
        background: var(--color-accent);
    }

    .hero-copy {
        display: grid;
        gap: 1.5rem;
        min-inline-size: 0;
    }

    .hero h1 {
        max-inline-size: 10ch;
        font-size: clamp(3.1rem, 7.5vw, 6.4rem);
        letter-spacing: -0.055em;
    }

    .hero-lede, .page-lede {
        max-inline-size: 42ch;
        color: var(--color-muted);
        font-size: clamp(1.15rem, 1rem + 0.7vw, 1.5rem);
        line-height: 1.6;
    }

    .hero-actions {
        padding-block-start: 0.4rem;
    }

    .hero-visual {
        justify-self: center;
        inline-size: min(78%, 18rem);
        aspect-ratio: 1;
    }

    .hero-visual img {
        inline-size: 100%;
        aspect-ratio: 1;
    }

    .region-list {
        grid-column: 1 / -1;
        display: flex;
        flex-wrap: wrap;
        gap: 0.5rem 1.5rem;
        color: var(--color-muted);
        font-size: 0.78rem;
        letter-spacing: 0.02em;
        list-style: none;
    }

    .region-list li {
        display: flex;
        align-items: center;
        gap: 0.6rem;
    }

    .region-list li::before {
        content: "";
        inline-size: 0.35rem;
        block-size: 0.35rem;
        border: 1px solid var(--color-accent);
        border-radius: 50%;
    }

    .button {
        min-block-size: 3rem;
        max-inline-size: 100%;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 1rem;
        padding: 0.85rem 1.35rem;
        border: 1px solid var(--color-accent);
        border-radius: var(--radius-small);
        background: var(--color-accent);
        color: var(--color-on-accent);
        font-size: 0.9rem;
        font-weight: 650;
        line-height: 1.45;
        text-align: center;
        text-decoration: none;
        cursor: pointer;
    }

    a.button::after {
        content: "";
        flex: 0 0 0.45rem;
        inline-size: 0.45rem;
        block-size: 0.45rem;
        border-block-start: 1.5px solid currentColor;
        border-inline-end: 1.5px solid currentColor;
        transform: rotate(45deg);
    }

    .button:hover:enabled, a.button:hover {
        background: var(--color-accent-strong);
        border-color: var(--color-accent-strong);
        color: var(--color-on-accent);
        text-decoration: none;
    }

    .button:active:enabled, a.button:active {
        transform: translateY(1px);
    }

    .button:disabled {
        border-color: var(--color-control-border);
        background: var(--color-surface-raised);
        color: var(--color-muted);
        cursor: not-allowed;
    }

    .project-teaser h2 {
        font-size: clamp(1.5rem, 2.6vw, 2.1rem);
    }

    .more-section .section-label, .project-teaser .section-label {
        margin-block-end: 0.75rem;
    }

    .text-link {
        font-size: 0.95em;
        font-weight: 600;
    }

    .footer-name {
        display: flex;
        align-items: center;
        gap: 0.8rem;
        color: var(--color-text);
        white-space: nowrap;
    }

    .footer-name img {
        inline-size: 2.25rem;
        aspect-ratio: 1;
    }

    .privacy-scope, .legal-toc, .privacy-note, .guest-panel {
        display: grid;
        grid-template-columns: minmax(0, 1fr);
        gap: 1rem;
        padding: var(--space-panel);
        border: 1px solid var(--color-border);
        border-radius: var(--radius-medium);
        background: var(--color-surface);
    }

    .privacy-scope, .privacy-note, .guest-panel {
        border-inline-start: 3px solid var(--color-accent);
    }

    .privacy-scope h2, .legal-toc h2, .guest-panel h2 {
        font-size: clamp(1.4rem, 2.5vw, 1.9rem);
    }

    .legal-toc {
        background: var(--color-surface-raised);
    }

    .legal-toc ol {
        display: grid;
        gap: 0.5rem 2.5rem;
        margin: 0;
        padding-inline-start: 1.4rem;
        font-size: 0.9rem;
    }

    .legal-toc li {
        padding-inline-start: 0.15rem;
    }

    .legal-toc li::marker {
        color: var(--color-muted);
        font-variant-numeric: tabular-nums;
    }

    .legal-toc a {
        display: inline-block;
        padding-block: 0.25rem;
        line-height: 1.55;
    }

    @media (max-width: 40rem) {
        .legal-toc {
            gap: 0.75rem;
            padding: 1rem;
        }

        .legal-toc ol {
            gap: 0.3rem;
            padding-inline-start: 0;
            font-size: 0.84rem;
            line-height: 1.4;
            list-style: none;
            counter-reset: legal-toc-item;
        }

        .legal-toc li {
            counter-increment: legal-toc-item;
            display: grid;
            grid-template-columns: 1.75rem minmax(0, 1fr);
            align-items: start;
            gap: 0.35rem;
            padding-inline-start: 0;
        }

        .legal-toc li::before {
            content: counter(legal-toc-item) ".";
            padding-block: 0.125rem;
            color: var(--color-muted);
            font-variant-numeric: tabular-nums;
            line-height: 1.4;
            text-align: end;
        }

        .legal-toc a {
            padding-block: 0.125rem;
            line-height: 1.4;
        }
    }

    .legal-document {
        padding-block-start: 0;
    }

    .legal-document h2 {
        max-inline-size: 32ch;
        font-size: clamp(1.5rem, 2.7vw, 2rem);
    }

    .legal-document h3 {
        max-inline-size: 40ch;
        margin-block-start: 0.75rem;
    }

    .legal-document ul, .guest-rule-list {
        display: grid;
        gap: 0.75rem;
        max-inline-size: var(--reading-max);
        padding-inline-start: 1.35rem;
    }

    .legal-address {
        display: grid;
        gap: 0.2rem;
    }

    .privacy-facts {
        display: grid;
        gap: 0.8rem;
        max-inline-size: var(--reading-max);
        margin: 0;
    }

    .privacy-facts dt {
        padding-block-start: 1rem;
        border-block-start: 1px solid var(--color-border);
        font-size: 0.95rem;
        font-weight: 650;
    }

    .privacy-facts dd {
        margin: 0;
        padding-block-end: 0.25rem;
    }

    .privacy-note {
        margin-block-start: 0.75rem;
    }

    .privacy-note h3 {
        margin: 0;
    }

    .guest-acceptance {
        display: grid;
        grid-template-columns: auto minmax(0, 1fr);
        gap: 0.8rem;
        align-items: start;
        max-inline-size: var(--reading-max);
        cursor: pointer;
    }

    .guest-talk-button {
        justify-self: start;
    }

    .guest-gate-note {
        color: var(--color-muted);
        font-size: 0.9em;
    }

    @media (max-width: 63.999rem) {
        .theme-control label {
            position: absolute;
            inline-size: 1px;
            block-size: 1px;
            overflow: hidden;
            clip-path: inset(50%);
            white-space: nowrap;
        }
    }

    @media (min-width: 48rem) {
        .site-brand {
            inline-size: 15.75rem;
        }

        .site-brand picture, .site-brand img {
            aspect-ratio: 3;
        }

        .hero-visual {
            inline-size: min(92%, 27rem);
        }

        .legal-toc ol {
            grid-template-columns: repeat(2, minmax(0, 1fr));
        }
    }
}

@layer utilities {
    @media (prefers-reduced-motion: no-preference) {
        a, button, select {
            transition: transform var(--transition-fast);
        }
    }

    @media (forced-colors: active) {
        .more-section, .privacy-scope, .legal-toc, .privacy-note, .guest-panel, .privacy-facts dt {
            border-color: CanvasText;
        }

        .button {
            border: 2px solid ButtonText;
        }

        .button:disabled {
            border-color: GrayText;
            color: GrayText;
        }

        :focus-visible {
            outline-color: Highlight;
        }
    }
}