/**
 * Keyboard Lab Base Primitives
 * Route-scoped tokens, typography, accessibility, and shared components.
 */

:root {
    --lab-bg: #f2f4f7;
    --lab-surface: #ffffff;
    --lab-text: #0b0e14;
    --lab-muted: #5a6170;
    --lab-border: #d8dde7;
    --lab-accent: #00d166;
    --lab-warn: #ff3b30;

    --arena-bg: #0b0e14;
    --arena-surface: #111724;
    --arena-surface-strong: #151f2f;
    --arena-text: #f2f4f7;
    --arena-muted: #a8b2c6;
    --arena-border: #223047;
    --arena-accent: #9d50bb;
    --arena-accent-soft: rgba(157, 80, 187, 0.25);
    --arena-accent-glow: 0 0 24px rgba(157, 80, 187, 0.45);

    --focus-ring: #005fcc;
    --focus-ring-contrast: #ffffff;

    --font-sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
    --font-mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", Menlo, Monaco, Consolas, "Liberation Mono", monospace;

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --shadow-soft: 0 6px 24px rgba(10, 14, 20, 0.08);
    --shadow-border: inset 0 0 0 1px rgba(255, 255, 255, 0.06);
}

.kbdlab {
    font-family: var(--font-sans);
    color: var(--lab-text);
    line-height: 1.5;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
}

body.kbdlab {
    margin: 0;
}

body.kbdlab main {
    display: block;
}

.kbdlab--lab {
    background: var(--lab-bg);
    color: var(--lab-text);
}

.kbdlab--arena {
    background:
        radial-gradient(circle at 12% 8%, rgba(157, 80, 187, 0.2), transparent 35%),
        radial-gradient(circle at 90% 90%, rgba(157, 80, 187, 0.12), transparent 40%),
        linear-gradient(180deg, #0b0e14 0%, #0a1019 100%);
    color: var(--arena-text);
}

.kbdlab code,
.kbdlab pre,
.kbdlab .kl-mono {
    font-family: var(--font-mono);
}

.kbdlab .kl-stat-value,
.kbdlab .kl-zen-count,
.kbdlab [data-kbdlab-cps-current],
.kbdlab [data-kbdlab-cps-avg],
.kbdlab [data-kbdlab-cps-max],
.kbdlab [data-kbdlab-total] {
    font-variant-numeric: tabular-nums;
}

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

.skip-link {
    position: absolute;
    top: 0.75rem;
    left: 0.75rem;
    z-index: 1000;
    width: auto;
    height: auto;
    margin: 0;
    overflow: visible;
    white-space: normal;
    clip: auto;
    -webkit-clip-path: none;
    clip-path: none;
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius-sm);
    background: var(--focus-ring);
    color: #fff;
    font-weight: 700;
    text-decoration: none;
    transform: translateY(-180%);
    transition: transform 0.2s ease;
}

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

.kbdlab :focus-visible {
    outline: 3px solid var(--focus-ring);
    outline-offset: 2px;
}

.kbdlab a {
    color: inherit;
}

.kbdlab-header {
    position: sticky;
    top: 0;
    z-index: 90;
    padding: 0.85rem 1rem 0;
}

.kbdlab-header__inner {
    width: min(1180px, calc(100% - 2rem));
    margin: 0 auto;
    padding: 0.55rem 0.7rem;
    border-radius: 999px;
    border: 1px solid rgba(26, 32, 44, 0.16);
    background: rgba(255, 255, 255, 0.64);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.8rem;
}

.kbdlab--arena .kbdlab-header__inner {
    border-color: rgba(242, 244, 247, 0.18);
    background: rgba(17, 23, 36, 0.72);
    box-shadow: var(--shadow-border);
}

.kbdlab-header__brand {
    padding: 0.24rem 0.56rem;
    border-radius: 999px;
    font-family: var(--font-sans);
    font-size: 0.86rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    text-decoration: none;
    white-space: nowrap;
}

.kbdlab--arena .kbdlab-header__brand {
    color: var(--arena-text);
}

.kbdlab-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    justify-content: flex-end;
}

.kbdlab-nav__link {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 2.1rem;
    padding: 0.35rem 0.8rem;
    border-radius: 999px;
    font-size: 0.86rem;
    font-weight: 600;
    text-decoration: none;
    color: inherit;
    transition: color 0.2s ease, background-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.kbdlab-nav__link::after {
    content: "";
    position: absolute;
    left: 50%;
    bottom: 0.3rem;
    width: 0;
    height: 2px;
    transform: translateX(-50%);
    border-radius: 2px;
    background: rgba(157, 80, 187, 0.48);
    transition: width 0.18s ease;
}

.kbdlab--arena .kbdlab-nav__link::after {
    background: rgba(157, 80, 187, 0.72);
}

.kbdlab-nav__link:hover::after,
.kbdlab-nav__link:focus-visible::after {
    width: calc(100% - 1.4rem);
}

.kbdlab-nav__link:hover,
.kbdlab-nav__link:focus-visible {
    transform: translateY(-1px);
}

.kbdlab-nav__link.is-active,
.kbdlab-nav__link[aria-current="page"] {
    background: rgba(157, 80, 187, 0.12);
    box-shadow: inset 0 0 0 1px rgba(157, 80, 187, 0.45);
}

.kbdlab--arena .kbdlab-nav__link.is-active,
.kbdlab--arena .kbdlab-nav__link[aria-current="page"] {
    background: rgba(157, 80, 187, 0.2);
    box-shadow: 0 0 12px rgba(157, 80, 187, 0.28), inset 0 0 0 1px rgba(157, 80, 187, 0.55);
}

.kl-trust-banner {
    margin: 0 auto 1.5rem;
    width: 100%;
    max-width: 820px;
    border-radius: var(--radius-md);
    border: 1px solid var(--lab-border);
    background: rgba(255, 255, 255, 0.82);
    padding: 0.85rem 1rem;
    box-shadow: var(--shadow-soft);
}

.kl-trust-banner__content {
    display: grid;
    gap: 0.2rem;
}

.kl-trust-banner__eyebrow {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--lab-muted);
}

.kl-trust-banner__headline {
    margin: 0;
    font-weight: 700;
    font-size: 0.96rem;
}

.kl-trust-banner__copy {
    margin: 0;
    color: var(--lab-muted);
    font-size: 0.88rem;
}

.kbdlab--arena .kl-trust-banner {
    border-color: var(--arena-border);
    background: rgba(17, 23, 36, 0.68);
    box-shadow: var(--shadow-border);
}

.kbdlab--arena .kl-trust-banner__eyebrow,
.kbdlab--arena .kl-trust-banner__copy {
    color: var(--arena-muted);
}

.kbdlab-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
    border-radius: 999px;
    border: 1px solid rgba(11, 14, 20, 0.18);
    background: rgba(255, 255, 255, 0.76);
    padding: 0.35rem 0.7rem;
    max-width: 100%;
}

.kbdlab-badge__icon {
    width: 1.1rem;
    height: 1.1rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--lab-muted);
    flex: 0 0 auto;
}

.kbdlab-badge__text {
    display: grid;
    gap: 0.05rem;
    font-size: 0.74rem;
    line-height: 1.25;
}

.kbdlab-badge__title {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.kbdlab-badge__subtitle {
    color: var(--lab-muted);
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.kbdlab--arena .kbdlab-badge {
    border-color: rgba(157, 80, 187, 0.6);
    background: rgba(157, 80, 187, 0.14);
    box-shadow: 0 0 18px rgba(157, 80, 187, 0.16);
}

.kbdlab--arena .kbdlab-badge__subtitle {
    color: var(--arena-muted);
}

.kbdlab--arena .kbdlab-badge__icon {
    color: var(--arena-muted);
}

.kbdlab-footer {
    margin-top: 2.2rem;
    padding: 1.2rem 1rem 1.4rem;
}

.kbdlab-footer__inner {
    width: min(1180px, calc(100% - 2rem));
    margin: 0 auto;
    padding: 1.05rem 1rem;
    border-radius: var(--radius-lg);
    border: 1px solid rgba(20, 28, 40, 0.16);
    background: linear-gradient(180deg, #e9edf3 0%, #e4e9f1 100%);
}

.kbdlab-footer__nav {
    display: flex;
    flex-wrap: wrap;
    gap: 0.55rem;
}

.kbdlab-footer__link {
    padding: 0.32rem 0.64rem;
    border-radius: 999px;
    text-decoration: none;
    font-size: 0.84rem;
    font-weight: 600;
    color: inherit;
    border: 1px solid transparent;
}

.kbdlab-footer__link:hover,
.kbdlab-footer__link:focus-visible {
    border-color: rgba(157, 80, 187, 0.44);
    background: rgba(157, 80, 187, 0.1);
}

.kbdlab-footer__lang {
    margin-top: 0.82rem;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.44rem;
}

.kbdlab-footer__lang-label {
    margin: 0;
    color: var(--lab-muted);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.kbdlab-footer__lang-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 0.36rem;
}

.kbdlab-footer__lang-link.is-current {
    border-color: rgba(157, 80, 187, 0.62);
    background: rgba(157, 80, 187, 0.18);
    font-weight: 700;
}

.kbdlab-footer__lang-link.is-fallback {
    border-style: dashed;
}

.kbdlab-footer__lang-text {
    display: inline-flex;
    align-items: center;
    min-height: 1.85rem;
    padding: 0.32rem 0.64rem;
    border-radius: 999px;
    border: 1px dashed rgba(157, 80, 187, 0.36);
    color: var(--lab-muted);
    font-size: 0.84rem;
    font-weight: 600;
}

.kbdlab-footer__trust {
    margin-top: 0.9rem;
    display: grid;
    gap: 0.26rem;
}

.kbdlab-footer__trust p {
    margin: 0;
    color: var(--lab-muted);
    font-size: 0.87rem;
}

.kbdlab-footer__meta {
    margin-top: 0.95rem;
    padding-top: 0.7rem;
    border-top: 1px dashed rgba(20, 28, 40, 0.2);
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 0.7rem;
}

.kbdlab-footer__meta p {
    margin: 0;
    font-size: 0.8rem;
    color: var(--lab-muted);
}

.kbdlab-footer__badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.3rem 0.62rem;
    border-radius: 999px;
    border: 1px solid rgba(157, 80, 187, 0.38);
    background: rgba(157, 80, 187, 0.09);
    font-family: var(--font-mono);
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.kbdlab-footer__badge svg {
    width: 0.85rem;
    height: 0.85rem;
}

.kbdlab--arena .kbdlab-footer__inner {
    border-color: var(--arena-border);
    background: linear-gradient(180deg, #121927 0%, #101826 100%);
    box-shadow: var(--shadow-border);
}

.kbdlab--arena .kbdlab-footer__trust p,
.kbdlab--arena .kbdlab-footer__meta p {
    color: var(--arena-muted);
}

.kbdlab--arena .kbdlab-footer__meta {
    border-top-color: rgba(242, 244, 247, 0.22);
}

.kbdlab--arena .kbdlab-footer__badge {
    border-color: rgba(157, 80, 187, 0.62);
    background: rgba(157, 80, 187, 0.18);
}

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