@layer reset, tokens, base, layout, components, motion, responsive;

@layer reset {

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

    html,
    body,
    h1,
    h2,
    p {
        margin: 0;
    }

    body {
        min-height: 100vh;
    }

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

    a {
        color: inherit;
    }
}

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

        --bg-color: #ffffff;
        --bg-soft: #fbfbfb;
        --text-primary: #111827;
        --text-secondary: #6b7280;
        --accent-color: #000000;
        --accent-hover: #374151;
        --border-color: #edf0f3;
        --shadow-soft: 0 16px 40px rgba(17, 24, 39, 0.06);

        --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
        --font-mono: "SFMono-Regular", "SF Mono", Consolas, "Liberation Mono", Menlo, monospace;

        --page-width: 48rem;
        --space-1: 0.25rem;
        --space-2: 0.5rem;
        --space-3: 0.75rem;
        --space-4: 1rem;
        --space-5: 1.25rem;
        --space-6: 1.5rem;
        --space-8: 2rem;
        --space-10: 2.5rem;
        --space-12: 3rem;
        --space-16: 4rem;
        --space-20: 5rem;
        --space-28: 7rem;

        --radius-md: 1rem;
        --radius-lg: 1.5rem;
        --transition-base: 160ms ease;
    }
}

@layer base {
    html {
        background-color: var(--bg-color);
        scroll-padding-top: var(--space-6);
    }

    body {
        background:
            radial-gradient(circle at top, rgba(17, 24, 39, 0.035), transparent 26rem),
            var(--bg-color);
        color: var(--text-primary);
        font-family: var(--font-family);
        line-height: 1.6;
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }

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

    ::selection {
        background-color: rgba(17, 24, 39, 0.12);
    }

    .skip-link {
        position: absolute;
        top: var(--space-3);
        left: var(--space-3);
        z-index: 10;
        padding: var(--space-3) var(--space-4);
        background-color: var(--accent-color);
        color: #ffffff;
        text-decoration: none;
        border-radius: 999px;
        transform: translateY(-140%);
        transition: transform var(--transition-base);
    }

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

    .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;
    }

    .no-js .access-form {
        display: none;
    }
}

@layer layout {
    .site-wrapper {
        width: min(100%, var(--page-width));
        min-height: 100vh;
        margin: 0 auto;
        padding-inline: var(--space-6);
        display: flex;
        flex-direction: column;
    }

    .site-header {
        padding-block: var(--space-12);
    }

    .site-main {
        flex: 1;
    }

    .hero {
        margin-block: var(--space-28);
    }

    .content-section {
        margin-block-end: var(--space-20);
        scroll-margin-top: var(--space-6);
    }

    .game-section {
        margin-block-end: var(--space-16);
    }

    .access-section {
        margin-block-end: var(--space-16);
    }

    .site-footer {
        padding-block: var(--space-12);
        border-top: 1px solid var(--border-color);
        color: var(--text-secondary);
        font-size: 0.875rem;
    }
}

@layer components {
    .brand-name {
        font-size: 1.125rem;
        font-weight: 600;
        letter-spacing: -0.01em;
    }

    .hero-kicker {
        margin-block-end: var(--space-3);
        color: var(--text-secondary);
        font-size: 0.8rem;
        font-weight: 700;
        letter-spacing: 0.18em;
        text-transform: uppercase;
    }

    .hero-title {
        max-width: 10ch;
        margin-block-end: var(--space-4);
        font-size: clamp(3.5rem, 12vw, 5.75rem);
        font-weight: 800;
        letter-spacing: -0.05em;
        line-height: 0.92;
    }

    .hero-subtitle {
        margin-block-end: var(--space-4);
        color: var(--text-primary);
        font-size: 1.35rem;
        font-weight: 600;
    }

    .hero-meta {
        margin-block-end: var(--space-10);
        color: var(--text-secondary);
        font-size: 1.05rem;
    }

    .section-title {
        margin-block-end: var(--space-5);
        font-size: 1.5rem;
        font-weight: 600;
        letter-spacing: -0.02em;
        color: var(--text-primary);
    }

    .content-section p,
    .game-heading p {
        max-width: 38rem;
        margin-block-end: var(--space-6);
        color: var(--text-secondary);
        font-size: 1.125rem;
    }

    .cta-button {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        min-height: 3rem;
        padding-inline: 1.75rem;
        background-color: var(--accent-color);
        color: #ffffff;
        text-decoration: none;
        border-radius: 999px;
        border: 1px solid var(--accent-color);
        font-weight: 500;
        transition:
            transform var(--transition-base),
            background-color var(--transition-base),
            border-color var(--transition-base),
            box-shadow var(--transition-base);
    }

    .cta-button:hover {
        background-color: var(--accent-hover);
        border-color: var(--accent-hover);
        transform: translateY(-1px);
        box-shadow: 0 4px 12px rgba(17, 24, 39, 0.12);
    }

    .link {
        display: inline-flex;
        width: fit-content;
        color: var(--text-primary);
        text-decoration: none;
        font-weight: 500;
        border-bottom: 1px solid var(--text-secondary);
        transition:
            color var(--transition-base),
            border-color var(--transition-base);
    }

    .link:hover {
        color: var(--accent-color);
        border-bottom-color: var(--accent-color);
    }

    .access-panel {
        max-width: 26rem;
        margin-left: auto;
        padding: var(--space-5);
        border: 1px solid #e6e8eb;
        border-radius: 1.25rem;
        background:
            radial-gradient(circle at top right, rgba(17, 24, 39, 0.05), transparent 9rem),
            linear-gradient(180deg, #fbfbfb 0%, #f4f5f6 100%);
        box-shadow: 0 10px 28px rgba(17, 24, 39, 0.05);
    }

    .access-copy > p:not(.access-eyebrow) {
        margin-block-end: var(--space-4);
        max-width: 24rem;
        font-size: 0.95rem;
    }

    .access-copy .access-eyebrow {
        margin-block-end: var(--space-2);
        color: var(--text-secondary);
        font-size: 0.72rem;
        font-weight: 700;
        letter-spacing: 0.18em;
        text-transform: uppercase;
    }

    .access-title {
        margin-block-end: var(--space-2);
        font-size: 1rem;
        font-weight: 700;
        letter-spacing: 0.08em;
        text-transform: uppercase;
        color: var(--text-primary);
    }

    .access-form {
        display: grid;
        gap: var(--space-3);
    }

    .access-label {
        font-size: 0.78rem;
        font-weight: 600;
        letter-spacing: 0.12em;
        text-transform: uppercase;
        color: var(--text-secondary);
    }

    .access-form-row {
        display: grid;
        grid-template-columns: minmax(0, 1fr) auto;
        gap: var(--space-2);
    }

    .access-input,
    .access-submit {
        min-height: 2.5rem;
        border-radius: 999px;
        font: inherit;
    }

    .access-input {
        width: 100%;
        padding-inline: var(--space-4);
        border: 1px solid #dde1e4;
        background-color: #ffffff;
        color: var(--text-primary);
        font-size: 0.95rem;
    }

    .access-input::placeholder {
        color: var(--text-secondary);
        text-transform: lowercase;
    }

    .access-submit {
        padding-inline: var(--space-5);
        border: 1px solid #111827;
        background-color: #111827;
        color: #ffffff;
        font-size: 0.85rem;
        font-weight: 700;
        letter-spacing: 0.08em;
        text-transform: uppercase;
        cursor: pointer;
        transition:
            background-color var(--transition-base),
            border-color var(--transition-base),
            transform var(--transition-base);
    }

    .access-submit:hover {
        background-color: var(--accent-hover);
        border-color: var(--accent-hover);
        transform: translateY(-1px);
    }

    .access-submit[disabled] {
        opacity: 0.7;
        cursor: wait;
        transform: none;
    }

    .access-help,
    .access-status,
    .access-noscript {
        margin-block-end: 0;
        color: var(--text-secondary);
        font-size: 0.82rem;
    }

    .access-status {
        min-height: 1.2rem;
    }

    .access-status[data-state="error"] {
        color: #b45309;
    }

    .access-status[data-state="success"] {
        color: #166534;
    }

    .dino-game-shell {
        width: 100%;
        overflow: hidden;
        border: 1px solid var(--border-color);
        border-radius: var(--radius-lg);
        background: linear-gradient(180deg, #ffffff 0%, var(--bg-soft) 100%);
        box-shadow: var(--shadow-soft);
    }

    .dino-canvas {
        width: 100%;
        height: auto;
        aspect-ratio: 18 / 5;
        cursor: pointer;
        touch-action: manipulation;
        image-rendering: pixelated;
        image-rendering: crisp-edges;
    }

    .dino-canvas:focus-visible {
        outline-offset: -6px;
    }
}

@layer motion {

    .site-header,
    .hero,
    .content-section,
    .site-footer {
        animation: fade-in-up 600ms ease both;
    }

    .hero {
        animation-delay: 120ms;
    }

    .content-section {
        animation-delay: 220ms;
    }

    .site-footer {
        animation-delay: 320ms;
    }

    @keyframes fade-in-up {
        from {
            opacity: 0;
            transform: translateY(10px);
        }

        to {
            opacity: 1;
            transform: translateY(0);
        }
    }

    @media (prefers-reduced-motion: reduce) {
        html:focus-within {
            scroll-behavior: auto;
        }

        *,
        *::before,
        *::after {
            animation-duration: 0.01ms !important;
            animation-iteration-count: 1 !important;
            transition-duration: 0.01ms !important;
            scroll-behavior: auto !important;
        }
    }
}

@layer responsive {
    @media (max-width: 40rem) {
        .site-wrapper {
            padding-inline: var(--space-5);
        }

        .site-header {
            padding-block: var(--space-8);
        }

        .hero {
            margin-block: var(--space-16);
        }

        .hero-subtitle,
        .hero-meta,
        .content-section p,
        .game-heading p {
            font-size: 1rem;
        }

        .access-panel {
            max-width: 100%;
            padding: var(--space-4);
        }

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

        .access-submit {
            width: 100%;
        }

        .dino-game-shell {
            border-radius: var(--radius-md);
        }
    }
}