*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --color-bg:           #0e0e18;
    --color-surface:      #161624;
    --color-surface-2:    #1e1e30;
    --color-header-bg:    #07070f;
    --color-header-text:  #c8c8e0;
    --color-accent:       #5a95e8;
    --color-accent-hover: #78aaee;
    --color-text:         #dcdcf0;
    --color-text-muted:   #8888a8;
    --color-border:       #252538;
    --color-code-bg:      #0a0a14;
    --color-code-text:    #cdd6f4;
    --color-tag-bg:       #1a1e32;
    --color-tag-text:     #8ab4f8;
    --font-sans: 'Segoe UI', system-ui, -apple-system, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', 'Courier New', monospace;
    --radius: 6px;
    --shadow: 0 1px 6px rgba(0,0,0,0.4), 0 2px 16px rgba(0,0,0,0.3);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.65;
    font-size: 16px;
}

/* ─── NAVIGATION ─────────────────────────────── */

nav {
    background-color: var(--color-header-bg);
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

.nav-inner {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 56px;
}

.nav-brand {
    font-size: 1.05rem;
    font-weight: 600;
    color: #ffffff;
    text-decoration: none;
    letter-spacing: 0.02em;
}

.nav-brand span {
    color: var(--color-accent);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 1.75rem;
    list-style: none;
}

.nav-links a {
    color: var(--color-header-text);
    text-decoration: none;
    font-size: 0.88rem;
    opacity: 0.7;
    transition: opacity 0.15s;
}

.nav-links a:hover {
    opacity: 1;
}

.theme-switch {
    background: var(--color-surface-2);
    border: 1px solid var(--color-border);
    color: var(--color-text-muted);
    font-size: 0.78rem;
    padding: 0.25rem 0.7rem;
    border-radius: 100px;
    text-decoration: none;
    transition: border-color 0.15s, color 0.15s;
    white-space: nowrap;
}

.theme-switch:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

/* ─── HERO ────────────────────────────────────── */

.hero {
    background-color: var(--color-header-bg);
    color: var(--color-header-text);
    padding: 5rem 2rem 4rem;
    text-align: center;
    border-bottom: 1px solid var(--color-border);
}

.hero-inner {
    max-width: 780px;
    margin: 0 auto;
}

.hero-label {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: 1.2rem;
}

.hero h1 {
    font-size: 2.6rem;
    font-weight: 700;
    color: #ffffff;
    line-height: 1.2;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.1rem;
    opacity: 0.6;
    max-width: 600px;
    margin: 0 auto 2rem;
}

.hero-badges {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 2.5rem;
}

.badge {
    background: rgba(90, 149, 232, 0.1);
    border: 1px solid rgba(90, 149, 232, 0.25);
    color: #8ab4f8;
    font-size: 0.78rem;
    padding: 0.25rem 0.75rem;
    border-radius: 100px;
    font-family: var(--font-mono);
}

.hero-actions {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.btn {
    display: inline-block;
    padding: 0.65rem 1.5rem;
    border-radius: var(--radius);
    font-size: 0.92rem;
    font-weight: 600;
    text-decoration: none;
    transition: background-color 0.15s, border-color 0.15s, color 0.15s;
    cursor: pointer;
}

.btn-primary {
    background-color: var(--color-accent);
    color: #0a0a14;
    border: 1px solid var(--color-accent);
}

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

.btn-secondary {
    background-color: transparent;
    color: var(--color-header-text);
    border: 1px solid rgba(255,255,255,0.18);
}

.btn-secondary:hover {
    border-color: rgba(255,255,255,0.4);
}

/* ─── MAIN LAYOUT ────────────────────────────── */

main {
    max-width: 1100px;
    margin: 0 auto;
    padding: 3rem 2rem 5rem;
}

section {
    margin-bottom: 4rem;
}

section:last-child {
    margin-bottom: 0;
}

h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 1.25rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--color-border);
}

h3 {
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 0.6rem;
    color: var(--color-text);
}

p {
    margin-bottom: 0.75rem;
    color: var(--color-text);
}

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

a:hover {
    text-decoration: underline;
}

/* ─── FEATURES GRID ──────────────────────────── */

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.25rem;
}

.feature-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: var(--shadow);
    transition: border-color 0.15s;
}

.feature-card:hover {
    border-color: rgba(90, 149, 232, 0.3);
}

.feature-card h3 {
    font-size: 0.95rem;
    margin-bottom: 0.4rem;
    color: #ffffff;
}

.feature-card p {
    font-size: 0.88rem;
    color: var(--color-text-muted);
    margin: 0;
}

/* ─── INSTALL BOX ────────────────────────────── */

.install-box {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 2rem;
    box-shadow: var(--shadow);
    margin-bottom: 1.5rem;
}

.install-box h3 {
    font-size: 0.78rem;
    margin-bottom: 1rem;
    color: var(--color-text-muted);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.07em;
}

.step-list {
    list-style: none;
    counter-reset: steps;
}

.step-list li {
    counter-increment: steps;
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
    align-items: flex-start;
}

.step-list li:last-child {
    margin-bottom: 0;
}

.step-list li::before {
    content: counter(steps);
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    background: var(--color-accent);
    color: #0a0a14;
    font-size: 0.75rem;
    font-weight: 700;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 0.5rem;
}

.step-list li > div {
    flex: 1;
}

/* ─── CODE BLOCKS ────────────────────────────── */

pre {
    background: var(--color-code-bg);
    color: var(--color-code-text);
    border-radius: var(--radius);
    padding: 1.1rem 1.25rem;
    overflow-x: auto;
    font-family: var(--font-mono);
    font-size: 0.875rem;
    line-height: 1.6;
    margin: 0.6rem 0;
    border: 1px solid rgba(255,255,255,0.05);
}

code:not(pre code) {
    background: rgba(90, 149, 232, 0.1);
    color: var(--color-accent);
    padding: 0.15em 0.45em;
    border-radius: 3px;
    font-family: var(--font-mono);
    font-size: 0.855em;
    border: 1px solid rgba(90, 149, 232, 0.15);
}

/* ─── DISTRO LIST ────────────────────────────── */

.distro-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.distro-tag {
    background: var(--color-tag-bg);
    color: var(--color-tag-text);
    border: 1px solid rgba(90, 149, 232, 0.2);
    padding: 0.3rem 0.85rem;
    border-radius: 100px;
    font-size: 0.83rem;
    font-weight: 500;
}

/* ─── DEPENDENCY TABLE ───────────────────────── */

.dep-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.dep-table th {
    background: var(--color-surface-2);
    color: var(--color-text-muted);
    font-size: 0.78rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    padding: 0.75rem 1.1rem;
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}

.dep-table td {
    padding: 0.65rem 1.1rem;
    border-bottom: 1px solid var(--color-border);
    vertical-align: top;
}

.dep-table tr:last-child td {
    border-bottom: none;
}

.dep-table td:first-child {
    font-family: var(--font-mono);
    font-size: 0.83rem;
    white-space: nowrap;
    color: var(--color-accent);
}

.dep-table td:last-child {
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

/* ─── INFO GRID ──────────────────────────────── */

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 1rem;
}

.info-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1.25rem 1.5rem;
    box-shadow: var(--shadow);
}

.info-card .label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    color: var(--color-text-muted);
    margin-bottom: 0.3rem;
}

.info-card .value {
    font-size: 0.92rem;
    font-weight: 500;
    color: var(--color-text);
}

/* ─── USAGE SECTION ──────────────────────────── */

.usage-block {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: var(--shadow);
    margin-bottom: 1.25rem;
}

.usage-block h3 {
    font-size: 0.95rem;
    margin-bottom: 0.75rem;
    color: #ffffff;
}

.usage-block p {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    margin-bottom: 0.5rem;
}

/* ─── CALLOUT ────────────────────────────────── */

.callout {
    border-left: 3px solid var(--color-accent);
    background: rgba(90, 149, 232, 0.07);
    padding: 0.9rem 1.25rem;
    border-radius: 0 var(--radius) var(--radius) 0;
    font-size: 0.9rem;
    color: var(--color-text-muted);
    margin-bottom: 1rem;
}

.callout strong {
    color: var(--color-text);
}

/* ─── FOOTER ─────────────────────────────────── */

footer {
    background: var(--color-header-bg);
    color: rgba(255,255,255,0.3);
    text-align: center;
    padding: 2rem;
    font-size: 0.83rem;
    border-top: 1px solid var(--color-border);
}

footer a {
    color: rgba(255,255,255,0.5);
    text-decoration: none;
    transition: color 0.15s;
}

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

footer .footer-sep {
    margin: 0 0.5rem;
    opacity: 0.2;
}

/* ─── RESPONSIVE ─────────────────────────────── */

@media (max-width: 640px) {
    .hero h1 { font-size: 1.8rem; }
    .nav-links { display: none; }
    .features-grid { grid-template-columns: 1fr; }
    .info-grid { grid-template-columns: 1fr; }
}