/* lossless.dev — monochrome stark landing
   Palette:
     #ffffff  primary (pure white background)
     #1a1a1a  secondary (text, lines)
     #f5f5f5  tertiary (subtle differentiation)
     #2563eb  accent (precise blue, the one color)
     #9ca3af  muted (captions)
     #e5e5e5  border (minimal dividers, pixel grid)
   Fonts:
     DM Mono (Google) — display + data
     Inter   (Google) — body
*/

:root {
    --c-primary: #ffffff;
    --c-secondary: #1a1a1a;
    --c-tertiary: #f5f5f5;
    --c-accent: #2563eb;
    --c-muted: #9ca3af;
    --c-border: #e5e5e5;

    --f-mono: "DM Mono", ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
    --f-body: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;

    --content-w: 480px;
    --content-w-wide: 720px;
    --block-gap: 8rem;

    --grid-color: #e5e5e5;
    --grid-step: 16px;
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    padding: 0;
    background: var(--c-primary);
    color: var(--c-secondary);
    font-family: var(--f-body);
    font-weight: 400;
    font-size: 16px;
    line-height: 1.8;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: geometricPrecision;
}

body {
    /* Pixel grid: barely visible 1px dots at 16px intervals */
    background-image: radial-gradient(circle, var(--grid-color) 0.6px, transparent 0.7px);
    background-size: var(--grid-step) var(--grid-step);
    background-position: 0 0;
}

#page {
    display: block;
    width: 100%;
    overflow-x: hidden;
}

/* ----------------------------- HERO ----------------------------- */

.hero {
    height: 100vh;
    min-height: 560px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: var(--c-primary);
    position: relative;
}

.hero-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 100%;
    padding: 0 1rem;
    transform: translateY(-2vh);
}

.equation {
    margin: 0;
    font-family: var(--f-mono);
    font-weight: 500;
    font-size: clamp(1rem, 2.5vw, 1.5rem);
    color: var(--c-secondary);
    letter-spacing: 0.05em;
    display: inline-flex;
    gap: 0.55em;
    align-items: baseline;
    white-space: nowrap;
}

.eq-token {
    display: inline-block;
    opacity: 0;
    transform: translateY(6px);
    transition: opacity 600ms ease, transform 600ms ease;
}

.eq-token.is-visible {
    opacity: 1;
    transform: translateY(0);
}

.eq-op {
    color: var(--c-secondary);
    transition: opacity 600ms ease, transform 600ms ease, color 1200ms ease;
}

.eq-op.is-pulsing {
    color: var(--c-accent);
}

.hero-rule {
    border: 0;
    width: 60%;
    max-width: 400px;
    height: 1px;
    background: var(--c-secondary);
    margin: 1.5rem 0 0.75rem;
    transform-origin: center;
    transform: scaleX(0);
    transition: transform 900ms cubic-bezier(0.2, 0.8, 0.2, 1) 200ms;
}

.hero-rule.is-drawn {
    transform: scaleX(1);
}

.domain-name {
    margin: 0;
    font-family: var(--f-body);
    font-weight: 400;
    font-size: 0.8rem;
    color: var(--c-muted);
    letter-spacing: 0.02em;
    opacity: 0;
    transition: opacity 700ms ease 900ms;
}

.domain-name.is-visible {
    opacity: 1;
}

.hero-scroll-cue {
    position: absolute;
    bottom: 2.25rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    opacity: 0;
    transition: opacity 600ms ease 1500ms;
}

.hero-scroll-cue.is-visible {
    opacity: 1;
}

.scroll-cue-text {
    font-family: var(--f-mono);
    font-weight: 400;
    font-size: 0.7rem;
    color: var(--c-muted);
    letter-spacing: 0.12em;
    text-transform: lowercase;
}

.scroll-cue-line {
    width: 1px;
    height: 28px;
    background: var(--c-muted);
    position: relative;
    overflow: hidden;
}

.scroll-cue-line::after {
    content: "";
    position: absolute;
    inset: 0;
    background: var(--c-secondary);
    transform: translateY(-100%);
    animation: scrollCue 2200ms cubic-bezier(0.6, 0, 0.4, 1) infinite;
}

@keyframes scrollCue {
    0%   { transform: translateY(-100%); }
    50%  { transform: translateY(0); }
    100% { transform: translateY(100%); }
}

/* --------------------------- DIVIDER --------------------------- */

.divider {
    display: flex;
    flex-direction: column;
    gap: 3px;
    align-items: center;
    padding: 2rem 0;
}

.divider-line {
    width: 24px;
    height: 1px;
    background: var(--c-secondary);
    transform-origin: center;
    transform: scaleX(0);
    transition: transform 500ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.divider-line:nth-child(2) { transition-delay: 80ms; }
.divider-line:nth-child(3) { transition-delay: 160ms; }

.divider.is-visible .divider-line {
    transform: scaleX(1);
}

/* ---------------------------- BLOCKS --------------------------- */

.block {
    width: 100%;
    padding: 0 1rem;
    margin: var(--block-gap) auto;
}

.block-inner {
    max-width: var(--content-w);
    margin: 0 auto;
    opacity: 0;
    transform: translateY(12px);
    transition: opacity 700ms ease, transform 700ms ease;
}

.block-inner-wide {
    max-width: var(--content-w-wide);
}

.block-inner.is-visible {
    opacity: 1;
    transform: translateY(0);
}

.block-eyebrow {
    margin: 0 0 1.25rem;
    font-family: var(--f-mono);
    font-weight: 400;
    font-size: 0.72rem;
    color: var(--c-muted);
    letter-spacing: 0.18em;
    text-transform: lowercase;
}

.block-heading {
    margin: 0 0 1.25rem;
    font-family: var(--f-mono);
    font-weight: 500;
    font-size: 1.1rem;
    color: var(--c-secondary);
    letter-spacing: 0;
    line-height: 1.5;
}

.block-body {
    margin: 0 0 1.5rem;
    font-family: var(--f-body);
    font-weight: 400;
    font-size: 0.9rem;
    line-height: 1.8;
    color: var(--c-secondary);
}

.inline-eq {
    font-family: var(--f-mono);
    font-weight: 500;
    color: var(--c-secondary);
    background: var(--c-tertiary);
    padding: 0.05em 0.4em;
    border-radius: 1px;
    white-space: nowrap;
}

.inline-eq sup {
    font-size: 0.75em;
}

.block-meta {
    margin: 1rem 0 0;
    font-family: var(--f-mono);
    font-weight: 400;
    font-size: 0.75rem;
    color: var(--c-muted);
    letter-spacing: 0.04em;
}

.meta-key {
    color: var(--c-muted);
}

.meta-val {
    color: var(--c-secondary);
}

.meta-sep {
    color: var(--c-border);
    margin: 0 0.5em;
}

/* --------------------------- TOOL LIST -------------------------- */

.tool-list {
    list-style: none;
    margin: 1.5rem 0 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.tool-row {
    display: grid;
    grid-template-columns: 5rem 1fr auto;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--c-border);
    transition: border-color 250ms ease;
}

.tool-row:last-child {
    border-bottom: 1px solid transparent;
}

.tool-row:hover {
    border-bottom-color: var(--c-secondary);
}

.tool-name {
    font-family: var(--f-mono);
    font-weight: 500;
    font-size: 0.85rem;
    color: var(--c-secondary);
    letter-spacing: 0.02em;
}

.tool-rule {
    height: 1px;
    background: var(--c-border);
    transition: background 250ms ease;
}

.tool-row:hover .tool-rule {
    background: var(--c-secondary);
}

.tool-note {
    font-family: var(--f-body);
    font-weight: 400;
    font-size: 0.78rem;
    color: var(--c-muted);
    letter-spacing: 0.01em;
}

/* --------------------------- SIZE BARS -------------------------- */

.size-list {
    margin-top: 2rem;
    display: flex;
    flex-direction: column;
    gap: 2.5rem;
}

.size-row {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.size-meta {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 1rem;
    font-family: var(--f-mono);
    font-weight: 400;
    font-size: 0.75rem;
    color: var(--c-muted);
    letter-spacing: 0.02em;
    flex-wrap: wrap;
}

.size-label {
    color: var(--c-secondary);
}

.size-figures {
    display: inline-flex;
    align-items: baseline;
    gap: 0.5em;
}

.size-original {
    color: var(--c-muted);
}

.size-arrow {
    color: var(--c-border);
}

.size-compressed {
    color: var(--c-secondary);
}

.size-percent {
    color: var(--c-accent);
    font-weight: 500;
    margin-left: 0.4em;
}

.size-bars {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-top: 0.25rem;
}

.size-bar {
    height: 8px;
    transform-origin: left center;
}

.size-bar-original {
    background: var(--c-secondary);
    width: 100%;
    transform: scaleX(0);
    transition: transform 1000ms cubic-bezier(0.2, 0.8, 0.2, 1) 100ms;
}

.size-bar-compressed {
    background: var(--c-accent);
    width: calc(var(--ratio, 0.5) * 100%);
    transform: scaleX(0);
    transition: transform 1100ms cubic-bezier(0.2, 0.8, 0.2, 1) 350ms;
}

.size-row.is-visible .size-bar-original,
.size-row.is-visible .size-bar-compressed {
    transform: scaleX(1);
}

.size-note {
    margin: 0.25rem 0 0;
    font-family: var(--f-mono);
    font-weight: 400;
    font-size: 0.7rem;
    color: var(--c-muted);
    letter-spacing: 0.06em;
}

/* ----------------------------- DIFF ----------------------------- */

.diff {
    margin-top: 2rem;
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 1.25rem;
    align-items: stretch;
}

.diff-col {
    display: flex;
    flex-direction: column;
    border: 1px solid var(--c-border);
    background: var(--c-primary);
}

.diff-head {
    margin: 0;
    padding: 0.6rem 0.9rem;
    font-family: var(--f-mono);
    font-weight: 400;
    font-size: 0.7rem;
    color: var(--c-muted);
    letter-spacing: 0.12em;
    text-transform: lowercase;
    border-bottom: 1px solid var(--c-border);
}

.diff-pane {
    margin: 0;
    padding: 1rem 0.9rem;
    flex: 1;
    font-family: var(--f-mono);
    font-weight: 400;
    font-size: 0.78rem;
    line-height: 1.7;
    color: var(--c-secondary);
    background: var(--c-primary);
    white-space: pre;
    overflow-x: auto;
}

.diff-foot {
    margin: 0;
    padding: 0.55rem 0.9rem;
    border-top: 1px solid var(--c-border);
    font-family: var(--f-mono);
    font-weight: 400;
    font-size: 0.7rem;
    color: var(--c-muted);
    letter-spacing: 0.04em;
    display: flex;
    justify-content: space-between;
    gap: 0.5rem;
}

.diff-foot .diff-val {
    color: var(--c-secondary);
}

.diff-eq {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 6px;
    font-family: var(--f-mono);
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--c-secondary);
    line-height: 1;
}

.diff-eq span {
    display: block;
}

.diff-verdict {
    margin: 1.5rem 0 0;
    font-family: var(--f-mono);
    font-weight: 500;
    font-size: 0.8rem;
    color: var(--c-muted);
    letter-spacing: 0.06em;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    justify-content: center;
}

.verdict-token {
    transition: color 400ms ease;
}

.diff-verdict.is-verified .verdict-token {
    color: var(--c-accent);
}

.verdict-dots {
    display: inline-flex;
    gap: 4px;
}

.verdict-dots span {
    width: 4px;
    height: 4px;
    background: var(--c-muted);
    border-radius: 50%;
    animation: verdictPulse 1400ms ease-in-out infinite;
}

.verdict-dots span:nth-child(2) { animation-delay: 180ms; }
.verdict-dots span:nth-child(3) { animation-delay: 360ms; }

.diff-verdict.is-verified .verdict-dots span {
    background: var(--c-accent);
    animation: none;
}

@keyframes verdictPulse {
    0%, 100% { opacity: 0.25; transform: translateY(0); }
    50%      { opacity: 1;    transform: translateY(-1px); }
}

/* ----------------------------- FOOTER --------------------------- */

.footer {
    width: 100%;
    padding: 6rem 1rem 4rem;
    margin-top: 2rem;
    border-top: 1px solid var(--c-border);
    background: var(--c-primary);
}

.footer-inner {
    max-width: var(--content-w-wide);
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.footer-line {
    margin: 0;
    font-family: var(--f-mono);
    font-weight: 500;
    font-size: 0.85rem;
    color: var(--c-secondary);
    letter-spacing: 0.04em;
}

.footer-name {
    color: var(--c-secondary);
}

.footer-tag {
    color: var(--c-muted);
}

.footer-sep {
    color: var(--c-border);
    margin: 0 0.5em;
}

.footer-meta {
    margin: 0;
    font-family: var(--f-mono);
    font-weight: 400;
    font-size: 0.7rem;
    color: var(--c-muted);
    letter-spacing: 0.06em;
}

/* ---------------------------- LINKS ----------------------------- */

a {
    color: var(--c-accent);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color 200ms ease;
}

a:hover {
    border-bottom-color: var(--c-accent);
}

/* ---------------------------- SELECTION ------------------------- */

::selection {
    background: var(--c-secondary);
    color: var(--c-primary);
}

/* ---------------------------- RESPONSIVE ------------------------ */

@media (max-width: 720px) {
    .diff {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }
    .diff-eq {
        flex-direction: row;
        gap: 8px;
        padding: 0.25rem 0;
    }
    :root {
        --block-gap: 5rem;
    }
    .footer {
        padding: 4rem 1rem 3rem;
    }
}

@media (max-width: 420px) {
    .equation {
        font-size: 1rem;
        gap: 0.4em;
    }
    .tool-row {
        grid-template-columns: 4.5rem 1fr auto;
        gap: 0.5rem;
    }
}