/* ============================================================
   LINUX_DISTRO_ARCHIVE — Design tokens & minimal custom styles
   Most styling is handled by Tailwind. This file only contains:
   - CSS variable color tokens for light/dark theming
   - Things Tailwind can't do (keyframes, complex tooltip positioning)
   ============================================================ */

/* --- Light theme (default) --- */
:root {
    --color-background: #fafaf9;
    --color-surface: #fafaf9;
    --color-surface-dim: #ededec;
    --color-surface-container-lowest: #ffffff;
    --color-surface-container-low: #f3f3f2;
    --color-surface-container: #edecec;
    --color-surface-container-high: #e5e5e5;
    --color-surface-container-highest: #d7d6d6;

    --color-on-surface: #1b1b1d;
    --color-on-background: #1b1b1d;
    --color-on-surface-variant: #474649;
    --color-outline: #6a7375;
    --color-outline-variant: #bac5c7;

    --color-primary: #006970;
    --color-on-primary: #ffffff;
    --color-primary-container: #006970;
    --color-on-primary-container: #ffffff;

    --color-secondary-container: #5516be;
    --color-on-secondary: #ffffff;
    --color-on-secondary-container: #ffffff;

    --color-tertiary: #1b1b1d;
    --color-on-tertiary: #fafaf9;

    --color-error: #ba1a1a;
    --color-on-error: #ffffff;
    --color-error-container: #ffdad6;
    --color-on-error-container: #410002;
}

/* --- Dark theme --- */
html.dark {
    --color-background: #0a0a0b;
    --color-surface: #0a0a0b;
    --color-surface-dim: #131314;
    --color-surface-container-lowest: #0e0e0f;
    --color-surface-container-low: #1c1b1c;
    --color-surface-container: #201f20;
    --color-surface-container-high: #2a2a2b;
    --color-surface-container-highest: #353436;

    --color-on-surface: #e5e2e3;
    --color-on-background: #e5e2e3;
    --color-on-surface-variant: #b9cacb;
    --color-outline: #849495;
    --color-outline-variant: #3b494b;

    --color-primary: #dbfcff;
    --color-on-primary: #00363a;
    --color-primary-container: #00f0ff;
    --color-on-primary-container: #00363a;

    --color-secondary-container: #571bc1;
    --color-on-secondary: #ffffff;
    --color-on-secondary-container: #c4abff;

    --color-tertiary: #f8f4f7;
    --color-on-tertiary: #303032;

    --color-error: #ffb4ab;
    --color-on-error: #690005;
    --color-error-container: #93000a;
    --color-on-error-container: #ffdad6;
}

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    background: var(--color-background);
    color: var(--color-on-surface);
    font-family: Inter, system-ui, sans-serif;
}

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

/* --- Navigation link styling (active + inactive state) --- */
.nav-link {
    color: var(--color-on-surface-variant);
    transition: color 150ms ease, border-color 150ms ease;
    padding-bottom: 4px;
    border-bottom: 2px solid transparent;
}
.nav-link:hover {
    color: var(--color-on-surface);
}
.nav-link.active {
    color: var(--color-primary-container);
    border-bottom-color: var(--color-primary-container);
}

/* --- Category / filter pills (active vs inactive state via .active class) --- */
.pill,
.app-pill,
.hw-pill {
    border-color: var(--color-surface-container-highest);
    color: var(--color-on-surface-variant);
    background: transparent;
}
.pill:hover,
.app-pill:hover,
.hw-pill:hover {
    color: var(--color-on-surface);
    border-color: var(--color-outline);
}
.pill.active,
.app-pill.active,
.hw-pill.active {
    border-color: var(--color-primary-container);
    color: var(--color-primary-container);
    background: color-mix(in srgb, var(--color-primary-container) 10%, transparent);
}

/* --- Footer links --- */
.footer-link {
    font-family: "JetBrains Mono", ui-monospace, monospace;
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--color-on-surface-variant);
    text-decoration: underline;
    text-decoration-style: dotted;
    text-decoration-color: transparent;
    transition: color 150ms, text-decoration-color 150ms;
}
.footer-link:hover {
    color: var(--color-primary-container);
    text-decoration-color: var(--color-primary-container);
}

/* --- Blinking cursor (hero terminal) --- */
.blinking-cursor::after {
    content: '_';
    animation: blink 1s step-end infinite;
    margin-left: 2px;
}
@keyframes blink {
    from, to { color: transparent; }
    50% { color: var(--color-primary-container); }
}

/* --- Glass panel (over images) --- */
.glass-panel {
    background: color-mix(in srgb, var(--color-surface-container-low) 60%, transparent);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

/* --- Toast --- */
.toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(1rem);
    background: var(--color-surface-container);
    border: 1px solid var(--color-surface-container-highest);
    padding: 0.65rem 1.25rem;
    font-size: 0.875rem;
    color: var(--color-on-surface);
    box-shadow: 0 8px 24px rgba(0,0,0,0.35);
    z-index: 1000;
    opacity: 0;
    transition: opacity 200ms ease, transform 200ms ease;
    pointer-events: none;
    font-family: "JetBrains Mono", ui-monospace, monospace;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* --- Checksum tooltip (JS-positioned, escapes overflow containers) --- */
.checksum-wrap { position: relative; display: inline-block; }
.checksum-tooltip {
    display: none;
    position: fixed;
    width: 300px;
    background: var(--color-surface-container);
    border: 1px solid var(--color-surface-container-highest);
    padding: 0.75rem 1rem;
    font-size: 0.75rem;
    line-height: 1.6;
    color: var(--color-on-surface-variant);
    box-shadow: 0 8px 24px rgba(0,0,0,0.3);
    z-index: 500;
    white-space: normal;
    text-align: left;
    pointer-events: none;
    font-family: "JetBrains Mono", ui-monospace, monospace;
}
.checksum-tooltip strong {
    color: var(--color-on-surface);
    display: block;
    margin-bottom: 0.25rem;
}
.checksum-tooltip code {
    background: var(--color-surface-container-highest);
    padding: 0.1rem 0.35rem;
    font-size: 0.7rem;
    color: var(--color-primary-container);
}
.checksum-tooltip.visible { display: block; }
@media (max-width: 768px) {
    .checksum-tooltip { width: 240px; }
}

/* --- Quiz step transitions --- */
.quiz-step { display: none; }
.quiz-step.active {
    display: block;
    animation: fadeIn 300ms ease;
}
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

/* --- Compare mode card selection indicator --- */
.compare-mode .distro-card-wrap { cursor: pointer; }
.compare-mode .distro-card-wrap .distro-card { pointer-events: none; }
/* In compare mode, hide the regular badge — the compare checkbox takes that spot */
.compare-mode .distro-card-wrap .card-badge { visibility: hidden; }
.compare-mode .distro-card-wrap::after {
    content: '';
    position: absolute;
    top: 0.75rem;
    right: 0.75rem;
    width: 28px;
    height: 28px;
    border: 2px solid var(--color-outline);
    background: var(--color-surface-container-lowest);
    z-index: 3;
    transition: all 150ms ease;
}
.compare-mode .distro-card-wrap.selected::after {
    border-color: var(--color-primary-container);
    background: var(--color-primary-container);
    box-shadow: inset 0 0 0 4px var(--color-surface-container-lowest);
}
.compare-mode .distro-card-wrap.selected {
    outline: 2px solid var(--color-primary-container);
}

/* Compare FAB — hide when attribute [hidden] set */
#compare-fab[hidden] { display: none !important; }

/* Upvoted heart */
.upvote-btn.upvoted svg {
    fill: var(--color-error);
    stroke: var(--color-error);
}
.upvote-btn.upvoted { color: var(--color-error); }

/* Image grayscale hover (design system quirk) */
.img-mono {
    filter: grayscale(100%);
    transition: filter 700ms ease;
}
.img-mono:hover { filter: grayscale(0%); }

/* Utility: uppercase monospace data */
.mono-upper {
    font-family: "JetBrains Mono", ui-monospace, monospace;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Print / reduced motion niceties */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}