/* ===============================================================
   style.css - Systems & PL
   =============================================================== */

/* --- Reset ------------------------------------------------------ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body { -webkit-font-smoothing: antialiased; }
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
button { cursor: pointer; border: none; background: none; font: inherit; }
ul { list-style: none; }
code {
    font-family: var(--font-mono);
    font-variant-ligatures: contextual;
    font-feature-settings: "liga" 1, "calt" 1;
}

/* --- Variables: Light (default) --------------------------------- */
:root {
    --bg:           #f5f7fc;
    --surface:      #ffffff;
    --surface2:     #edf0f8;
    --border:       #dde3ee;
    --border-faint: #eef1f8;
    --text:         #0d1117;
    --text-muted:   #5a6878;
    --text-faint:   #8a98aa;
    --accent:       #1a56db;
    --accent-dim:   rgba(26, 86, 219, 0.1);
    --accent-glow:  rgba(26, 86, 219, 0.2);
    --green:        #059669;
    --green-dim:    rgba(5, 150, 105, 0.1);
    --amber:        #d97706;
    --amber-dim:    rgba(217, 119, 6, 0.1);
    --code-bg:      #eef1f8;
    --code-text:    #1e2d45;
    --shadow-sm:    0 1px 3px rgba(0,0,0,0.07), 0 1px 2px rgba(0,0,0,0.04);
    --shadow-md:    0 4px 12px rgba(0,0,0,0.08), 0 2px 4px rgba(0,0,0,0.04);
    --shadow-lg:    0 10px 30px rgba(0,0,0,0.1), 0 4px 8px rgba(0,0,0,0.05);
    --font-mono:    'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;
    --font-sans:    'Inter', system-ui, -apple-system, sans-serif;
    --radius:       8px;
    --radius-lg:    14px;
    --nav-h:        62px;
    --transition:   0.2s ease;
}

/* --- Variables: Dark --------------------------------------------- */
:root.dark {
    --bg:           #070c17;
    --surface:      #0e1525;
    --surface2:     #172035;
    --border:       #22304a;
    --border-faint: #182440;
    --text:         #e6edf8;
    --text-muted:   #7888a8;
    --text-faint:   #3d506a;
    --accent:       #4f90f8;
    --accent-dim:   rgba(79, 144, 248, 0.12);
    --accent-glow:  rgba(79, 144, 248, 0.25);
    --green:        #2dd4bf;
    --green-dim:    rgba(45, 212, 191, 0.1);
    --amber:        #fbbf24;
    --amber-dim:    rgba(251, 191, 36, 0.1);
    --code-bg:      #080d1a;
    --code-text:    #c8d4e8;
    --shadow-sm:    0 1px 3px rgba(0,0,0,0.5);
    --shadow-md:    0 4px 12px rgba(0,0,0,0.5);
    --shadow-lg:    0 10px 30px rgba(0,0,0,0.6);
}

/* Auto-detect: matches when no manual override is present */
@media (prefers-color-scheme: dark) {
    :root:not(.dark):not(.light) {
        --bg:           #070c17;
        --surface:      #0e1525;
        --surface2:     #172035;
        --border:       #22304a;
        --border-faint: #182440;
        --text:         #e6edf8;
        --text-muted:   #7888a8;
        --text-faint:   #3d506a;
        --accent:       #4f90f8;
        --accent-dim:   rgba(79, 144, 248, 0.12);
        --accent-glow:  rgba(79, 144, 248, 0.25);
        --green:        #2dd4bf;
        --green-dim:    rgba(45, 212, 191, 0.1);
        --amber:        #fbbf24;
        --amber-dim:    rgba(251, 191, 36, 0.1);
        --code-bg:      #080d1a;
        --code-text:    #c8d4e8;
        --shadow-sm:    0 1px 3px rgba(0,0,0,0.5);
        --shadow-md:    0 4px 12px rgba(0,0,0,0.5);
        --shadow-lg:    0 10px 30px rgba(0,0,0,0.6);
    }
}

/* --- Base -------------------------------------------------------- */
body {
    font-family: var(--font-sans);
    font-size: 1rem;
    line-height: 1.7;
    color: var(--text);
    background: var(--bg);
    transition: background var(--transition), color var(--transition);
}

.container {
    width: 100%;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* --- Scroll Progress --------------------------------------------- */
.scroll-progress {
    position: fixed;
    top: 0; left: 0;
    width: 0%;
    height: 2px;
    background: var(--accent);
    z-index: 1000;
    transition: width 0.1s linear;
}

/* --- Navigation -------------------------------------------------- */
.site-header {
    position: fixed;
    top: 0; left: 0; right: 0;
    height: var(--nav-h);
    z-index: 100;
    border-bottom: 1px solid transparent;
    transition: background var(--transition), border-color var(--transition), backdrop-filter var(--transition);
}

.site-header.scrolled {
    background: color-mix(in srgb, var(--bg) 85%, transparent);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-color: var(--border);
}

.nav {
    height: 100%;
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-brand {
    font-family: var(--font-mono);
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text);
    display: flex;
    align-items: center;
    gap: 0;
    white-space: nowrap;
    flex-shrink: 0;
}
.brand-prompt { color: var(--green); margin-right: 0.35em; }
.brand-cursor {
    color: var(--accent);
    animation: blink 1.1s step-end infinite;
    margin-left: 1px;
}

.nav-links {
    display: flex;
    gap: 0.15rem;
    margin: 0 auto;
}
.nav-links a {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    color: var(--text-muted);
    padding: 0.35rem 0.7rem;
    border-radius: var(--radius);
    transition: color var(--transition), background var(--transition);
}
.nav-links a:hover { color: var(--text); background: var(--accent-dim); }

.theme-toggle {
    width: 36px; height: 36px;
    border-radius: var(--radius);
    display: flex; align-items: center; justify-content: center;
    color: var(--text-muted);
    background: var(--surface2);
    border: 1px solid var(--border);
    transition: color var(--transition), background var(--transition);
    flex-shrink: 0;
}
.theme-toggle:hover { color: var(--text); background: var(--accent-dim); border-color: var(--accent); }
.theme-toggle svg { width: 16px; height: 16px; }
.icon-moon { display: none; }
:root.dark .icon-sun  { display: none; }
:root.dark .icon-moon { display: block; }
@media (prefers-color-scheme: dark) {
    :root:not(.dark):not(.light) .icon-sun  { display: none; }
    :root:not(.dark):not(.light) .icon-moon { display: block; }
}

/* --- Hero -------------------------------------------------------- */
.hero {
    position: relative;
    min-height: 100svh;
    display: flex;
    align-items: center;
    padding: calc(var(--nav-h) + 3rem) 0 4rem;
    overflow: hidden;
}

.hero-bg-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(var(--border-faint) 1px, transparent 1px),
        linear-gradient(90deg, var(--border-faint) 1px, transparent 1px);
    background-size: 48px 48px;
    opacity: 0.7;
}

.hero-bg-glow {
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse 60% 60% at 70% 50%, var(--accent-dim) 0%, transparent 70%);
    pointer-events: none;
}

.hero-layout {
    position: relative;
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 3rem;
}

.hero-eyebrow {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--accent);
    margin-bottom: 1.2rem;
    letter-spacing: 0.02em;
}

.hero-title {
    font-family: var(--font-mono);
    font-size: clamp(3rem, 6vw, 5.5rem);
    font-weight: 700;
    line-height: 1.05;
    letter-spacing: -0.03em;
    color: var(--text);
    margin-bottom: 1.25rem;
}

.hero-sub {
    font-size: 1.05rem;
    color: var(--text-muted);
    line-height: 1.7;
    margin-bottom: 2rem;
}

.hero-actions { display: flex; gap: 0.85rem; flex-wrap: wrap; }

.btn-primary {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    font-weight: 500;
    padding: 0.65rem 1.4rem;
    background: var(--accent);
    color: #fff;
    border-radius: var(--radius);
    transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
    box-shadow: 0 2px 8px var(--accent-glow);
}
.btn-primary:hover {
    background: color-mix(in srgb, var(--accent) 85%, #000);
    transform: translateY(-1px);
    box-shadow: 0 4px 16px var(--accent-glow);
}

.btn-ghost {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    padding: 0.65rem 1.4rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text-muted);
    transition: color var(--transition), border-color var(--transition), background var(--transition);
}
.btn-ghost:hover { color: var(--text); border-color: var(--accent); background: var(--accent-dim); }

/* Terminal */
.hero-terminal {
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-lg);
    background: var(--code-bg);
    font-family: var(--font-mono);
    font-size: 0.8rem;
}

.terminal-chrome {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.7rem 1rem;
    background: var(--surface2);
    border-bottom: 1px solid var(--border);
}

.terminal-dots { display: flex; gap: 6px; }
.td { width: 12px; height: 12px; border-radius: 50%; }
.td-red    { background: #ff5f57; }
.td-yellow { background: #febc2e; }
.td-green  { background: #28c840; }

.terminal-title-label {
    font-size: 0.72rem;
    color: var(--text-faint);
    margin: 0 auto;
}

.terminal-body {
    padding: 1.1rem 1.2rem;
    min-height: 140px;
    font-variant-ligatures: contextual;
    font-feature-settings: "liga" 1, "calt" 1;
}

.terminal-prompt-line {
    display: flex;
    align-items: baseline;
    gap: 0;
    white-space: nowrap;
    overflow: hidden;
}
.t-dir   { color: var(--accent); }
.t-sym   { color: var(--text-muted); margin-right: 0.5em; }
.t-cmd   { color: var(--text); }
.t-cursor {
    color: var(--green);
    animation: blink 0.9s step-end infinite;
    margin-left: 1px;
    font-size: 0.9em;
}

.terminal-output {
    margin-top: 0.5rem;
    color: var(--text-muted);
    font-size: 0.75rem;
    line-height: 1.6;
}
.terminal-output .t-success { color: var(--green); }
.terminal-output .t-data    { color: var(--accent); }
.terminal-output .t-plain   { color: var(--text-muted); }

/* --- Section Base ------------------------------------------------ */
.section {
    padding: 5.5rem 0;
    border-top: 1px solid var(--border-faint);
}

.section-header { text-align: center; margin-bottom: 3.5rem; }
.section-tag {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--accent);
    display: block;
    margin-bottom: 0.6rem;
    letter-spacing: 0.05em;
}
.section-title {
    font-family: var(--font-mono);
    font-size: clamp(1.8rem, 3.5vw, 2.6rem);
    font-weight: 700;
    letter-spacing: -0.025em;
    color: var(--text);
    margin-bottom: 0.7rem;
}
.section-sub { font-size: 1rem; color: var(--text-muted); max-width: 560px; margin: 0 auto; }

/* --- Reveal Animations ------------------------------------------- */
[data-reveal] {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.55s ease, transform 0.55s ease;
}
[data-reveal].revealed {
    opacity: 1;
    transform: none;
}

/* --- Manifesto Cards --------------------------------------------- */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.25rem;
}

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.75rem;
    transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}
.card:hover {
    border-color: var(--accent);
    box-shadow: 0 0 0 1px var(--accent-dim), var(--shadow-md);
    transform: translateY(-2px);
}
.card-icon { font-size: 1.6rem; margin-bottom: 0.9rem; line-height: 1; }
.card h3 {
    font-family: var(--font-mono);
    font-size: 1rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 0.65rem;
    letter-spacing: -0.01em;
}
.card p { font-size: 0.92rem; color: var(--text-muted); line-height: 1.7; }
.card code {
    font-size: 0.82em;
    padding: 0.1em 0.4em;
    background: var(--accent-dim);
    border-radius: 4px;
    color: var(--accent);
}

/* --- Latency Chart ----------------------------------------------- */
.latency-section { background: var(--bg); }

.latency-legend {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    margin-bottom: 2.5rem;
    flex-wrap: wrap;
}
.legend-item {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.5em;
}
.legend-item::before {
    content: '';
    display: inline-block;
    width: 12px; height: 3px;
    border-radius: 2px;
}
.legend-item.ns  { color: var(--green); }
.legend-item.ns::before  { background: var(--green); }
.legend-item.us  { color: var(--accent); }
.legend-item.us::before  { background: var(--accent); }
.legend-item.ms  { color: var(--amber); }
.legend-item.ms::before  { background: var(--amber); }

.latency-chart {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.latency-row {
    display: grid;
    grid-template-columns: 280px 1fr 100px;
    align-items: center;
    gap: 1rem;
    padding: 0.75rem 1.5rem;
    border-bottom: 1px solid var(--border-faint);
    transition: background var(--transition);
}
.latency-row:last-child { border-bottom: none; }
.latency-row:hover { background: var(--surface2); }

.latency-label {
    font-size: 0.82rem;
    color: var(--text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.latency-bar-wrap {
    height: 8px;
    background: var(--surface2);
    border-radius: 4px;
    overflow: hidden;
}
.latency-bar {
    height: 100%;
    width: 0%;
    border-radius: 4px;
    transition: width 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}
.latency-bar.ns  { background: var(--green); }
.latency-bar.us  { background: var(--accent); }
.latency-bar.ms  { background: var(--amber); }

.latency-value {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    text-align: right;
    white-space: nowrap;
}
.latency-value.ns  { color: var(--green); }
.latency-value.us  { color: var(--accent); }
.latency-value.ms  { color: var(--amber); }

.latency-note {
    font-size: 0.78rem;
    color: var(--text-faint);
    text-align: center;
    margin-top: 1.25rem;
    font-style: italic;
}

/* --- Stack / Languages ------------------------------------------- */
.lang-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
    margin-bottom: 3rem;
}

.lang-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.6rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}
.lang-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}
.lang-primary { border-top: 2px solid var(--accent); }
.lang-primary:hover { border-top-color: var(--accent); border-color: var(--accent); }

.lang-header { display: flex; align-items: center; gap: 0.75rem; }
.lang-name {
    font-family: var(--font-mono);
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text);
}
.lang-badge {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    padding: 0.15em 0.55em;
    border-radius: 999px;
    font-weight: 500;
    letter-spacing: 0.03em;
}
.lang-badge.primary    { background: var(--accent-dim); color: var(--accent); }
.lang-badge.secondary  { background: var(--green-dim); color: var(--green); }
.lang-badge.tertiary   { background: var(--amber-dim); color: var(--amber); }

.lang-desc { font-size: 0.88rem; color: var(--text-muted); line-height: 1.65; }
.lang-desc code {
    font-size: 0.85em;
    padding: 0.1em 0.35em;
    background: var(--code-bg);
    border-radius: 3px;
    color: var(--accent);
}

.lang-tags { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.lang-tags span {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    padding: 0.2em 0.6em;
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text-faint);
    background: var(--surface2);
}

.lang-meter {
    height: 4px;
    background: var(--surface2);
    border-radius: 2px;
    overflow: hidden;
}
.lang-fill {
    height: 100%;
    width: var(--pct);
    border-radius: 2px;
    background: var(--accent);
    transition: width 1s cubic-bezier(0.4, 0, 0.2, 1) 0.3s;
}
.lang-fill.secondary { background: var(--green); }
.lang-fill.tertiary  { background: var(--amber); }

/* Tools */
.tools-block {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 2rem;
}
.tools-title {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 1.5rem;
}
.tools-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0;
}
.tool-item {
    padding: 1rem;
    border: 1px solid transparent;
    border-radius: var(--radius);
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
    transition: background var(--transition), border-color var(--transition);
}
.tool-item:hover { background: var(--surface2); border-color: var(--border); }
.tool-name {
    font-family: var(--font-mono);
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text);
}
.tool-desc { font-size: 0.75rem; color: var(--text-faint); }

/* --- Craft ------------------------------------------------------- */
.craft-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
    margin-bottom: 3rem;
}

.craft-feels, .craft-concepts { }
.craft-feels h3, .craft-concepts h3 {
    font-family: var(--font-mono);
    font-size: 1rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 1.25rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border);
}

.feels-list { display: flex; flex-direction: column; gap: 0.55rem; }
.feels-list li {
    font-size: 0.88rem;
    color: var(--text-muted);
    display: flex;
    align-items: baseline;
    gap: 0.7rem;
    padding: 0.4rem 0.6rem;
    border-radius: 6px;
    transition: background var(--transition);
}
.feels-list li:hover { background: var(--surface2); color: var(--text); }
.feels-list code {
    font-size: 0.8em;
    color: var(--accent);
    background: var(--accent-dim);
    padding: 0.1em 0.35em;
    border-radius: 3px;
}
.check { color: var(--green); font-size: 0.85rem; flex-shrink: 0; }

.concepts-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.9rem;
}
.concept-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.1rem;
    transition: border-color var(--transition), transform var(--transition);
}
.concept-card:hover { border-color: var(--accent); transform: translateY(-1px); }
.concept-card h4 {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 0.45rem;
}
.concept-card p { font-size: 0.8rem; color: var(--text-muted); line-height: 1.6; }
.concept-card code {
    font-size: 0.82em;
    color: var(--accent);
    background: var(--accent-dim);
    padding: 0.1em 0.3em;
    border-radius: 3px;
}

/* Code Showcase */
.code-showcase {
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}
.code-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.7rem 1.2rem;
    background: var(--surface2);
    border-bottom: 1px solid var(--border);
}
.code-meta { display: flex; align-items: center; gap: 0.85rem; flex: 1; }
.code-lang-tag {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 600;
    padding: 0.2em 0.65em;
    background: var(--accent-dim);
    color: var(--accent);
    border-radius: 4px;
    letter-spacing: 0.03em;
}
.code-comment { font-family: var(--font-mono); font-size: 0.75rem; color: var(--text-faint); }

.copy-btn {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    padding: 0.25em 0.8em;
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text-muted);
    background: var(--surface);
    transition: color var(--transition), border-color var(--transition), background var(--transition);
}
.copy-btn:hover { color: var(--text); border-color: var(--accent); background: var(--accent-dim); }

.code-block {
    margin: 0;
    padding: 1.5rem 1.4rem;
    background: var(--code-bg);
    overflow-x: auto;
    font-family: var(--font-mono);
    font-size: 0.82rem;
    line-height: 1.75;
    color: var(--code-text);
    font-variant-ligatures: contextual;
    font-feature-settings: "liga" 1, "calt" 1;
}
.code-block code { font-family: inherit; font-size: inherit; }

/* Syntax highlight tokens */
.ck { color: #c792ea; }             /* keyword */
.ct { color: #82aaff; }             /* type */
.cs { color: #c3e88d; }             /* string */
.cc { color: var(--text-faint); font-style: italic; } /* comment */

:root.dark .ck { color: #c792ea; }
:root.dark .ct { color: #82b1ff; }
:root.dark .cs { color: #c3e88d; }
:root.dark .cc { color: #546e7a; }

@media (prefers-color-scheme: dark) {
    :root:not(.dark):not(.light) .ck { color: #c792ea; }
    :root:not(.dark):not(.light) .ct { color: #82b1ff; }
    :root:not(.dark):not(.light) .cs { color: #c3e88d; }
    :root:not(.dark):not(.light) .cc { color: #546e7a; }
}

/* --- Quotes ------------------------------------------------------ */
.quotes-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
}

.quote-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.6rem;
    display: flex;
    flex-direction: column;
    gap: 1.1rem;
    transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}
.quote-card:hover {
    transform: translateY(-2px);
    border-color: var(--accent);
    box-shadow: var(--shadow-md);
}
.quote-card p {
    font-size: 0.88rem;
    color: var(--text-muted);
    line-height: 1.75;
    flex: 1;
    font-style: italic;
}
.quote-card p em { color: var(--text); font-style: normal; }
.quote-card cite {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--accent);
    font-style: normal;
    not-italic: true;
}

/* --- Footer ------------------------------------------------------ */
.site-footer {
    padding: 2rem 0;
    border-top: 1px solid var(--border);
    margin-top: 0;
}
.footer-inner {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}
.footer-brand {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text);
}
.footer-tagline {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-faint);
    flex: 1;
}
.footer-perf {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--green);
}

/* --- Animations -------------------------------------------------- */
@keyframes blink {
    0%, 100% { opacity: 1; }
    50%       { opacity: 0; }
}

/* --- Responsive -------------------------------------------------- */
@media (max-width: 900px) {
    .hero-layout {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .hero-actions { justify-content: center; }
    .hero-bg-glow { background: radial-gradient(ellipse 80% 50% at 50% 30%, var(--accent-dim), transparent); }
    .hero-terminal { max-width: 520px; margin: 0 auto; }

    .cards-grid        { grid-template-columns: 1fr; }
    .lang-grid         { grid-template-columns: 1fr; }
    .quotes-grid       { grid-template-columns: repeat(2, 1fr); }
    .tools-grid        { grid-template-columns: repeat(2, 1fr); }
    .craft-layout      { grid-template-columns: 1fr; }
    .latency-row       { grid-template-columns: 180px 1fr 80px; }
}

@media (max-width: 640px) {
    .nav-links { display: none; }
    .hero-title { font-size: 2.8rem; }
    .section { padding: 3.5rem 0; }
    .quotes-grid       { grid-template-columns: 1fr; }
    .concepts-grid     { grid-template-columns: 1fr; }
    .latency-row       { grid-template-columns: 1fr 80px; gap: 0.5rem; padding: 0.75rem 1rem; }
    .latency-bar-wrap  { display: none; }
    .tools-grid        { grid-template-columns: repeat(2, 1fr); }
    .code-comment      { display: none; }
}