:root {
    --bg: #0d0e12;
    --bg-panel: #14161c;
    --border: #30353f;
    --text: #e8eaed;
    --text-dim: #8a909c;
    --copper: #c2793f;
    --copper-bright: #e0a15f;
    --copper-dim: #6b4326;
    --green: #4caf50;
}

* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
}

body {
    background: var(--bg);
    background-image:
        radial-gradient(ellipse at top, rgba(194, 121, 63, 0.08), transparent 60%),
        radial-gradient(ellipse at bottom, rgba(76, 175, 80, 0.04), transparent 50%);
    color: var(--text);
    font-family: "Segoe UI", Roboto, -apple-system, BlinkMacSystemFont, sans-serif;
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

a {
    color: var(--copper-bright);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

/* ---------- Header / nav ---------- */

header.site-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px clamp(16px, 5vw, 64px);
    border-bottom: 1px solid var(--border);
    background: rgba(20, 22, 28, 0.85);
    backdrop-filter: blur(6px);
    position: sticky;
    top: 0;
    z-index: 10;
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
}

.brand img {
    height: 28px;
    width: 28px;
    border-radius: 6px;
}

.brand span {
    font-weight: 700;
    letter-spacing: 0.5px;
    font-size: 15px;
    color: var(--text);
}

nav.site-nav {
    display: flex;
    gap: clamp(14px, 3vw, 28px);
    font-size: 14px;
}

nav.site-nav a {
    color: var(--text-dim);
    font-weight: 600;
}

nav.site-nav a:hover,
nav.site-nav a.active {
    color: var(--copper-bright);
    text-decoration: none;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 11px 22px;
    border-radius: 8px;
    font-weight: 700;
    font-size: 14px;
    border: 1px solid transparent;
    cursor: pointer;
    transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

.btn:hover {
    text-decoration: none;
    transform: translateY(-1px);
}

.btn-primary {
    background: linear-gradient(180deg, var(--copper-bright), var(--copper));
    color: #1a1004;
    box-shadow: 0 4px 18px rgba(194, 121, 63, 0.35);
}

.btn-primary:hover {
    box-shadow: 0 6px 24px rgba(194, 121, 63, 0.5);
}

.btn-ghost {
    background: transparent;
    border-color: var(--border);
    color: var(--text);
}

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

.btn[disabled] {
    opacity: 0.5;
    cursor: default;
    pointer-events: none;
}

/* ---------- Hero ---------- */

.hero {
    text-align: center;
    padding: clamp(56px, 12vw, 110px) 20px clamp(40px, 8vw, 70px);
    max-width: 900px;
    margin: 0 auto;
}

.hero img.hero-logo {
    max-width: min(560px, 90vw);
    width: 100%;
    height: auto;
    filter: drop-shadow(0 8px 30px rgba(194, 121, 63, 0.25));
    margin-bottom: 8px;
}

.hero .tagline {
    color: var(--text-dim);
    font-size: clamp(15px, 2.2vw, 19px);
    margin: 6px 0 32px;
}

.hero .cta-row {
    display: flex;
    gap: 14px;
    justify-content: center;
    flex-wrap: wrap;
}

/* ---------- Sections ---------- */

main {
    flex: 1;
}

section {
    padding: 56px clamp(16px, 5vw, 64px);
    max-width: 1100px;
    margin: 0 auto;
    width: 100%;
}

section h2 {
    font-size: clamp(22px, 3vw, 30px);
    margin: 0 0 8px;
    text-align: center;
}

section .section-sub {
    text-align: center;
    color: var(--text-dim);
    margin: 0 0 36px;
    font-size: 15px;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
}

.feature-card {
    background: var(--bg-panel);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 22px 20px;
}

.feature-card .icon {
    font-size: 26px;
    margin-bottom: 10px;
    display: block;
}

.feature-card h3 {
    margin: 0 0 8px;
    font-size: 16px;
    color: var(--copper-bright);
}

.feature-card p {
    margin: 0;
    color: var(--text-dim);
    font-size: 14px;
}

.cta-section {
    text-align: center;
    padding-top: 0;
}

/* ---------- Downloads page ---------- */

.download-panel {
    background: var(--bg-panel);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: clamp(24px, 5vw, 44px);
    max-width: 640px;
    margin: 0 auto;
    text-align: center;
}

.download-panel .version-pill {
    display: inline-block;
    padding: 5px 14px;
    border-radius: 999px;
    background: rgba(194, 121, 63, 0.12);
    border: 1px solid var(--copper-dim);
    color: var(--copper-bright);
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.3px;
    margin-bottom: 18px;
}

.download-panel .big-download {
    width: 100%;
    justify-content: center;
    padding: 16px 24px;
    font-size: 16px;
    margin: 10px 0 6px;
}

.download-panel .file-meta {
    color: var(--text-dim);
    font-size: 13px;
    margin-top: 4px;
}

.status-line {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    color: var(--text-dim);
    font-size: 14px;
    min-height: 22px;
}

.spinner {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    border: 2px solid var(--border);
    border-top-color: var(--copper-bright);
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.dot-ok {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--green);
    display: inline-block;
    box-shadow: 0 0 8px rgba(76, 175, 80, 0.7);
}

.dot-err {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #e05a4c;
    display: inline-block;
}

.steps {
    text-align: left;
    max-width: 640px;
    margin: 40px auto 0;
    color: var(--text-dim);
    font-size: 14px;
}

.steps h3 {
    color: var(--text);
    font-size: 16px;
    margin-bottom: 10px;
}

.steps ol {
    padding-left: 20px;
}

.steps li {
    margin-bottom: 8px;
}

.sysreq {
    max-width: 640px;
    margin: 40px auto 0;
    font-size: 13px;
    color: var(--text-dim);
    border-top: 1px solid var(--border);
    padding-top: 20px;
}

.sysreq b {
    color: var(--text);
}

.linux-steps pre {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 16px 18px;
    overflow-x: auto;
    font-size: 13px;
    line-height: 1.7;
    margin: 14px 0;
}

.linux-steps code {
    font-family: "Cascadia Code", "Consolas", "SFMono-Regular", Menlo, monospace;
    color: var(--text);
}

/* ---------- Footer ---------- */

footer {
    border-top: 1px solid var(--border);
    padding: 26px clamp(16px, 5vw, 64px);
    text-align: center;
    color: var(--text-dim);
    font-size: 13px;
}

footer a {
    color: var(--text-dim);
}

footer a:hover {
    color: var(--copper-bright);
}