:root {
    --text: #e0e0e0;
    --muted: #9fb0b5;

    --accent: #4fd1c5;
    --accent-rgb: 79, 209, 197;
    --accent-line: rgba(var(--accent-rgb), 0.4);

    --card: rgba(7, 35, 45, 0.55);
    --card-border: rgba(224, 224, 224, 0.12);
    --inset: rgba(12, 22, 29, 0.8);

    --ok: #3fb950;
    --warn: #e3b341;
    --danger: #f85149;

    --link: var(--accent);
    --link-visited: #8fe6dd;

    --mock-bg: #141414;
    --mock-panel: #1c1c1c;
    --mock-line: #2a2a2a;
    --mock-inset: #262626;
    --mock-chip: #313131;
    --mock-dim: #8c8c8c;
    --mock-label: #a0a0a0;
    --mock-bright: #ececec;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    color: var(--text);
    margin: 0;
    font-family: Verdana, Geneva, Tahoma, sans-serif;
    font-size: 1em;
    background: linear-gradient(45deg, #0c161d, #341e0d, #07232d);
    background-size: 400% 400%;
    animation: gradient 30s ease infinite;
    min-height: 100vh;
    background-attachment: fixed;
}

@keyframes gradient {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

.container { max-width: 1280px; margin: 0 auto; padding: 0 24px; }
:where(a:link) { color: var(--link); }
:where(a:visited) { color: var(--link-visited); }

:is(.lede, .card) a:visited { color: var(--link-visited); }

nav {
    position: sticky;
    top: 0;
    z-index: 10;
    backdrop-filter: blur(8px);
    background: rgba(12, 22, 29, 0.6);
    border-bottom: 1px solid var(--card-border);
}

nav .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 60px;
}

.logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-size: 1.3em;
    font-weight: bold;
    letter-spacing: 0.25em;
    color: var(--text);
    text-decoration: none;
}

.logo-img { width: 32px; height: 32px; flex-shrink: 0; }

nav ul {
    display: flex;
    gap: 24px;
    list-style: none;
    margin: 0;
    padding: 0;
    align-items: center;
}

nav a { color: var(--muted); text-decoration: none; font-size: 0.85em; }

nav a:not(.btn):hover { color: var(--text); }

.nav-cta { display: none; }

.nav-cta.visible { display: block; animation: nav-cta-fade-in 0.2s ease; }

@keyframes nav-cta-fade-in {
    from { opacity: 0; transform: translateY(-4px); }
    to { opacity: 1; transform: none; }
}

.nav-support {
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.nav-heart {
    width: 24px;
    height: auto;
    flex-shrink: 0;
    transition: filter 0.2s ease;
}

.nav-support:hover .nav-heart { filter: brightness(1.35); }

.btn {
    display: inline-block;
    padding: 10px 22px;
    border: 0;
    border-radius: 6px;
    background: none;
    font-family: inherit;
    font-size: 0.85em;
    font-weight: bold;
    text-decoration: none;
    cursor: pointer;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.btn:hover { transform: translateY(-2px); }

.btn-primary { background: var(--accent); color: #062028; }

.btn-primary:hover { box-shadow: 0 6px 20px rgba(79, 209, 197, 0.35); }

.btn-ghost { border: 1px solid var(--card-border); color: var(--text); }

.btn-ghost:hover { border-color: var(--accent); }

.card {
    background: var(--card);
    border: 1px solid var(--card-border);
    border-radius: 10px;
}

.card { transition: border-color 0.2s ease, transform 0.2s ease; }

.card:hover { border-color: var(--accent-line); transform: translateY(-3px); }

.card code {
    background: var(--inset);
    border: 1px solid var(--card-border);
    border-radius: 4px;
    padding: 1px 6px;
    font-size: 0.9em;
    color: var(--accent);
}

section .lede { color: var(--muted); max-width: 680px; line-height: 1.7; }

section .dateline {
    margin: -4px 0 16px;
    font-size: 0.85em;
    color: var(--muted);
}

.card p { margin: 0; font-size: 0.85em; }

header.hero { padding: 80px 0 64px; }

.hero-inner {
    display: grid;
    grid-template-columns: 1fr 1.05fr;
    gap: 48px;
    align-items: center;
}

.hero h1 {
    display: flex;
    align-items: center;
    gap: 0.25em;
    font-size: 3em;
    margin: 0 0 8px;
    letter-spacing: 0.12em;
}

.hero-logo { width: 0.9em; height: 0.9em; flex-shrink: 0; }

.hero .tagline { font-size: 1.25em; color: var(--muted); margin: 0 0 12px; }

.hero .cta-row { display: flex; gap: 16px; flex-wrap: wrap; }

.window {
    background: var(--mock-bg);
    border: 1px solid var(--card-border);
    overflow: hidden;
    border-radius: 12px;
    box-shadow: 0 24px 64px rgba(0, 0, 0, 0.45);
    font-size: 11px;
}

.window-bar {
    display: flex;
    align-items: center;
    background: var(--mock-panel);
    border-bottom: 1px solid var(--mock-line);
    gap: 8px;
    padding: 10px 14px;
}

.dot { border-radius: 50%; }
.dot.r { background: var(--danger); }
.dot.y { background: var(--warn); }
.dot.g { background: var(--ok); }

.window-bar .dot { width: 10px; height: 10px; }

.chrome-mac, .chrome-linux { display: none; }

.chrome-windows {
    display: inline-flex;
    align-items: center;
    margin-left: auto;
    margin-right: 4px;
}

.os-mac .chrome-windows, .os-mac .chrome-linux { display: none; }

.os-mac .chrome-mac { display: inline-flex; align-items: center; gap: 8px; }

.cap-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 18px;
    color: #CCCCCC;
    border-radius: 3px;
    cursor: default;
}

.cap-btn:hover { background: #333333; color: #FFFFFF; }
.cap-btn.close:hover { background: #E81123; color: #FFFFFF; }
.os-linux .chrome-mac, .os-linux .chrome-windows { display: none; }

.os-linux .chrome-linux {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    margin-left: auto;
}

.os-linux .kde-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 15px;
    height: 15px;
    border-radius: 50%;
    background: #3A3F46;
    color: #DCE2EA;
    cursor: default;
}

.os-linux .kde-btn:hover { background: #4E5560; }
.os-linux .kde-btn.close { color: #FFFFFF; }
.os-linux .kde-btn.close:hover { background: #E5566A; }
.window-url {
    flex: 1;
    max-width: 240px;
    margin-left: 8px;
    background: var(--mock-inset);
    border-radius: 5px;
    padding: 3px 10px;
    color: var(--mock-dim);
    font-size: 10px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.board-mock {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
    padding: 10px;
    min-height: 320px;
}

.mock-column {
    background: var(--mock-panel);
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    min-width: 0;
}

.mock-column-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 10px;
    border-bottom: 2px solid var(--col-color);
}

.mock-column-header h4 {
    display: flex;
    align-items: center;
    gap: 5px;
    margin: 0;
    font-size: 9px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--mock-label);
    white-space: nowrap;
}

.mock-column-header h4 svg { flex-shrink: 0; color: var(--col-color); }

.mock-count {
    background: var(--mock-chip);
    border-radius: 10px;
    padding: 1px 7px;
    font-size: 9px;
    color: var(--mock-label);
}

.mock-cards { display: flex; flex-direction: column; gap: 6px; padding: 8px; }

.mock-card {
    background: var(--mock-inset);
    border: 1px solid #333;
    border-radius: 6px;
    padding: 8px;
    min-width: 0;
    cursor: pointer;
    transition: border-color 0.15s ease;
}

.mock-card-title {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin: 0 0 6px;
    padding: 0;
    border: 0;
    background: none;
    font: inherit;
    font-size: 10px;
    line-height: 1.35;
    text-align: start;
    cursor: pointer;
    color: var(--mock-bright);
}

.mock-badge {
    display: inline-flex;
    align-items: center;
    gap: 3px;
    font-size: 8.5px;
    font-weight: 500;
    padding: 1px 6px;
    border-radius: 4px;
    margin-right: 3px;
    white-space: nowrap;
}

.mock-badge.running { background: rgba(76, 154, 255, 0.1); color: #4C9AFF; }

.mock-badge .pulse {
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: currentColor;
    animation: pulse 1.6s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.25; }
}

.mock-diff {
    display: flex;
    gap: 3px;
    font-size: 8.5px;
    margin-top: 6px;
    color: var(--mock-dim);
    font-variant-numeric: tabular-nums;
}

.mock-diff .add { color: var(--ok); }
.mock-diff .del { color: var(--danger); }

.mock-progress {
    position: relative;
    display: block;
    width: 100%;
    height: 18px;
    margin-top: 6px;
    padding: 0;
    border: none;
    border-radius: 4px;
    background: var(--mock-chip);
    overflow: hidden;
    cursor: pointer;
    font: inherit;
    transition: background 0.15s ease;
}

.mock-progress-fill {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    opacity: 0.35;
    background: var(--ok);
}

.mock-progress-count {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    z-index: 1;
    font-size: 8.5px;
    font-weight: 600;
    font-variant-numeric: tabular-nums;
    color: var(--mock-bright);
    white-space: nowrap;
}

.mock-progress-chevron {
    position: absolute;
    right: 6px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--mock-dim);
    transition: transform 0.2s ease;
}

.mock-card.is-expanded .mock-progress { background: #3C3C3C; }
.mock-card.is-expanded .mock-progress-fill { opacity: 0.5; }
.mock-card.is-expanded .mock-progress-chevron { transform: translateY(-50%) rotate(180deg); }

.subtask-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.2s ease;
}

.mock-card.is-expanded .subtask-list { max-height: 420px; padding-top: 6px; }

.mock-subtask { border-left: 3px solid var(--sub-color, #333); }

.mock-card:hover { border-color: var(--accent-line); }
.mock-subtask:hover { border-left-color: var(--sub-color, #333); }

.mock-card-title::after {
    content: " \2192";
    color: var(--accent);
    opacity: 0;
    transition: opacity 0.15s ease;
}

.mock-card:hover .mock-card-title::after,
.mock-card-title:hover::after,
.mock-card-title:focus-visible::after { opacity: 1; }

.mock-card-title:hover { text-decoration: underline; text-decoration-color: var(--accent); }

.mock-card-title:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
    border-radius: 2px;
}

dialog.modal {
    width: min(560px, 92vw);
    max-height: min(76vh, 620px);
    margin: auto;
    padding: 0;
    color: var(--text);
    font-family: inherit;
}

dialog.modal[open] {
    display: flex;
    flex-direction: column;
}

dialog.modal::backdrop {
    background: rgba(6, 18, 24, 0.66);
    backdrop-filter: blur(3px);
}

.modal-body {
    flex: 1 1 auto;
    min-height: 0;
    overflow-y: auto;
    padding: 18px 18px 6px;
}

.modal-title {
    margin: 0 0 8px;
    font-size: 1.5em;
    line-height: 1.35;
    color: var(--mock-bright);
}

.modal-text {
    margin: 0 0 12px;
    font-size: 1.25em;
    line-height: 1.7;
    color: var(--muted);
}

.modal-foot {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding: 12px 18px;
    border-top: 1px solid var(--mock-line);
    background: var(--mock-panel);
}

.modal-close { font-size: 1.2em; padding: 6px 18px; }

.modal .window-bar [data-close] { cursor: pointer; }
.modal .window-bar .dot.r:hover { filter: brightness(1.25); }

body.is-locked { overflow: hidden; }

@media (prefers-reduced-motion: no-preference) {
    dialog.modal[open] { animation: modal-in 0.18s ease; }
    dialog.modal::backdrop { animation: modal-fade-in 0.18s ease; }
}

@keyframes modal-in {
    from { opacity: 0; transform: translateY(10px) scale(0.98); }
    to { opacity: 1; transform: none; }
}

@keyframes modal-fade-in {
    from { opacity: 0; }
    to { opacity: 1; }
}

section { padding: 72px 0; }

section h2 { font-size: 1.9em; margin: 0 0 8px; text-align: left; }

section .lede { text-align: left; margin: 0 0 24px; font-size: 0.9em; }

.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 20px; }
.card { padding: 24px; }

.card .icon { font-size: 1.6em; margin-bottom: 12px; }

.card h3 { margin: 0 0 10px; font-size: 1.05em; }

.card p { color: var(--muted); line-height: 1.65; }

footer {
    border-top: 1px solid var(--card-border);
    padding: 32px 0;
    text-align: center;
    color: var(--muted);
    font-size: 0.8em;
}

@media (max-width: 960px) {
    .hero-inner { grid-template-columns: 1fr; gap: 40px; }
    .hero-copy { text-align: center; }
    .hero h1 { justify-content: center; }
    .hero .cta-row { justify-content: center; }
}

@media (max-width: 640px) {
    .hero h1 { font-size: 2.2em; }
    nav ul { gap: 14px; }
    nav ul li.hide-sm { display: none; }
}

@media (max-width: 560px) {
    .window { font-size: 9px; }
    dialog.modal { font-size: 11px; }
    .board-mock { min-height: 260px; }
    .window-url { max-width: 110px; }
    .cap-btn { width: 22px; }
}

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