/* === COMMA — Lusion-Inspired Editorial Redesign === */
/* Pure Black #000 & Pure White #FFF. Premium editorial feel. */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=JetBrains+Mono:wght@300;400;500;700&display=swap');

/* ─── Accessibility: Reduced Motion ─── */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    .reveal, .reveal-scale, .stagger > *,
    .method-word, .anim-hidden,
    .section-problem .statement {
        opacity: 1 !important;
        transform: none !important;
    }
    .marquee-track { animation: none !important; }
    .features-track { flex-wrap: wrap !important; width: auto !important; }
}

/* ─── Design Tokens ─── */
:root {
    --black: #000000;
    --white: #FFFFFF;
    --gray-dim: rgba(255, 255, 255, 0.08);
    --gray-mid: rgba(255, 255, 255, 0.35);
    --gray-text: rgba(255, 255, 255, 0.7);
    --accent: rgba(255, 255, 255, 0.95);
    --font-sans: 'Inter', 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'JetBrains Mono', 'SF Mono', monospace;
    --type-display: clamp(3.5rem, 8vw + 1rem, 7.5rem);
    --type-h1: clamp(2.5rem, 5vw + 1rem, 5rem);
    --type-h2: clamp(1.75rem, 3vw + 0.5rem, 3rem);
    --type-h3: clamp(1.125rem, 1.5vw, 1.5rem);
    --type-body: clamp(1rem, 1.2vw, 1.25rem);
    --type-caption: 0.75rem;
    --type-mono-sm: 0.6875rem;
    --grid: 8px;
    --max-w: 1200px;
    --max-w-narrow: 800px;
    --space-section: clamp(120px, 15vh, 240px);
    --space-section-lg: clamp(160px, 20vh, 320px);
    --ease: cubic-bezier(0.4, 0, 0.2, 1);
    --ease-out: cubic-bezier(0, 0, 0.2, 1);
    --ease-expo: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
    --dur: 0.3s;
    --dur-slow: 0.8s;
    --dur-reveal: 1s;
    --cursor-size: 16px;
    --cursor-size-hover: 48px;
}

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    color-scheme: dark;
}

body {
    font-family: var(--font-sans);
    background: var(--black);
    color: var(--white);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

body.js-loaded .anim-hidden { opacity: 0; }

/* ─── Film Grain Overlay ─── */
body::after {
    content: '';
    position: fixed;
    inset: 0;
    z-index: 9999;
    pointer-events: none;
    opacity: 0.04;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='200' height='200' filter='url(%23n)' opacity='1'/%3E%3C/svg%3E");
    background-repeat: repeat;
    background-size: 200px 200px;
}

/* ─── Custom Cursor ─── */
.cursor-dot {
    position: fixed; top: 0; left: 0;
    width: var(--cursor-size); height: var(--cursor-size);
    border: 1px solid rgba(255,255,255,0.5);
    border-radius: 50%; pointer-events: none; z-index: 10000;
    transform: translate(-50%, -50%);
    transition: width 0.4s var(--ease-expo), height 0.4s var(--ease-expo),
                border-color 0.3s, background 0.3s;
    mix-blend-mode: difference;
}
.cursor-dot.hovering {
    width: var(--cursor-size-hover); height: var(--cursor-size-hover);
    background: rgba(255,255,255,0.06); border-color: rgba(255,255,255,0.3);
}
@media (pointer: coarse) {
    .cursor-dot { display: none !important; }
    body { cursor: auto !important; }
}

/* ─── Scroll Progress Bar ─── */
.scroll-progress {
    position: fixed; top: 0; left: 0; width: 0%; height: 1px;
    background: var(--white); z-index: 200; mix-blend-mode: difference;
}

/* ─── Section Nav Dots ─── */
.section-nav {
    position: fixed; right: calc(var(--grid) * 4); top: 50%;
    transform: translateY(-50%); z-index: 150;
    display: flex; flex-direction: column; gap: 20px;
}
.section-nav .dot {
    width: 6px; height: 6px; border-radius: 50%;
    border: 1px solid rgba(255,255,255,0.4); background: transparent;
    cursor: pointer; transition: background var(--dur) var(--ease), transform var(--dur) var(--ease);
    position: relative;
}
.section-nav .dot.active { background: var(--white); transform: scale(1.5); border-color: var(--white); }
.section-nav .dot::after {
    content: attr(data-label); position: absolute; right: 24px; top: 50%;
    transform: translateY(-50%); font-family: var(--font-mono); font-size: var(--type-mono-sm);
    letter-spacing: 0.08em; white-space: nowrap; opacity: 0;
    pointer-events: none; transition: opacity var(--dur) var(--ease); text-transform: uppercase;
}
.section-nav .dot:hover::after { opacity: 0.5; }

/* ─── Navigation ─── */
nav {
    position: fixed; top: 0; left: 0; right: 0; z-index: 100;
    background: rgba(0,0,0,0.7); backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--gray-dim);
    transition: transform var(--dur) var(--ease);
}
nav.hidden { transform: translateY(-100%); }
nav .container {
    display: flex; align-items: center; justify-content: space-between; height: 72px;
}
nav .brand {
    font-family: var(--font-sans); font-weight: 700; font-size: 0.875rem;
    text-decoration: none; border-bottom: none; letter-spacing: -0.01em;
    display: inline-flex; align-items: center; gap: 10px; transition: opacity var(--dur);
}
nav .brand:hover { opacity: 0.7; }
nav .brand .brand-icon { width: 28px; height: 28px; border-radius: 6px; }
nav .links { display: flex; align-items: center; gap: calc(var(--grid) * 3); }
nav .links a {
    font-family: var(--font-mono); font-size: var(--type-caption); letter-spacing: 0.05em;
    border-bottom: none; text-decoration: none; position: relative;
    transition: opacity var(--dur);
    padding: 12px 0; min-height: 44px; display: inline-flex; align-items: center;
}
nav .links a:hover { opacity: 0.6; }
nav .links a::after {
    content: ''; position: absolute; left: 0; bottom: -2px;
    width: 0; height: 1px; background: var(--white);
    transition: width var(--dur) var(--ease);
}
nav .links a:hover::after { width: 100%; }

.lang-toggle {
    font-family: var(--font-mono); font-size: var(--type-mono-sm); letter-spacing: 0.08em;
    background: transparent; border: 1px solid var(--gray-dim);
    color: var(--white); padding: 10px 16px; cursor: pointer;
    transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.lang-toggle:hover { border-color: var(--white); background: rgba(255,255,255,0.05); }

/* ─── Container ─── */
.container { max-width: var(--max-w); margin: 0 auto; padding: 0 calc(var(--grid) * 5); }
.container-narrow { max-width: var(--max-w-narrow); margin: 0 auto; padding: 0 calc(var(--grid) * 5); }
.spacer-nav { height: 72px; }

/* ─── Links ─── */
a { color: var(--white); text-decoration: none; border-bottom: 1px solid rgba(255,255,255,0.2); transition: opacity var(--dur) var(--ease), border-bottom-color var(--dur) var(--ease); }
a:hover { opacity: 0.7; border-bottom-color: var(--white); }

/* ─── Sections ─── */
section { padding: var(--space-section) 0; border-bottom: 1px solid var(--gray-dim); position: relative; }
section:last-of-type { border-bottom: none; }

.section-header {
    display: flex; align-items: center; gap: calc(var(--grid) * 3);
    margin-bottom: calc(var(--grid) * 8);
}
.section-header .header-line { flex: 1; height: 1px; background: var(--gray-dim); }
.section-sub {
    font-family: var(--font-mono); font-size: var(--type-body); font-weight: 300;
    color: var(--gray-text); margin-top: calc(var(--grid) * 2);
}

/* ─── Typography ─── */
h1 { font-family: var(--font-sans); font-size: var(--type-h1); font-weight: 800; letter-spacing: -0.04em; line-height: 1; }
h2 { font-family: var(--font-sans); font-size: var(--type-h2); font-weight: 700; letter-spacing: -0.03em; line-height: 1.1; margin-bottom: calc(var(--grid) * 4); }
h3 { font-family: var(--font-sans); font-size: var(--type-h3); font-weight: 500; line-height: 1.3; margin-bottom: calc(var(--grid) * 2); }
.mono { font-family: var(--font-mono); }
.label { font-family: var(--font-mono); font-size: var(--type-caption); font-weight: 400; letter-spacing: 0.15em; text-transform: uppercase; color: var(--gray-mid); }
.subtitle { font-family: var(--font-mono); font-size: var(--type-body); font-weight: 300; line-height: 1.7; color: var(--gray-text); }

/* ─── Hero ─── */
.hero {
    min-height: 100vh; display: flex; flex-direction: column;
    align-items: center; justify-content: center; text-align: center;
    padding: var(--space-section-lg) 0; position: relative; overflow: hidden;
    border-bottom: none;
}
.hero-bg-grid {
    position: absolute; inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse 50% 50% at 50% 50%, black 10%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse 50% 50% at 50% 50%, black 10%, transparent 70%);
    pointer-events: none;
}
.hero-content { position: relative; z-index: 1; max-width: 1000px; padding: 0 calc(var(--grid) * 4); }
.hero-label {
    font-family: var(--font-mono); font-size: var(--type-caption); font-weight: 400;
    letter-spacing: 0.2em; text-transform: uppercase; color: var(--gray-mid);
    margin-bottom: calc(var(--grid) * 6);
}
.hero-headline {
    font-family: var(--font-sans); font-size: var(--type-display); font-weight: 800;
    letter-spacing: -0.05em; line-height: 0.95; margin-bottom: calc(var(--grid) * 5);
}
.hero-headline .char { display: inline-block; }
.hero-headline .word { display: inline-block; overflow: hidden; }

/* Typewriter cursor */
.hero-cursor {
    display: inline-block; width: 3px; height: 0.85em;
    background: var(--white); margin-left: 4px;
    animation: blink 1s steps(1) infinite; vertical-align: text-bottom;
}
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0; } }
.hero-sub {
    font-family: var(--font-mono); font-size: clamp(1rem, 1.5vw, 1.25rem);
    font-weight: 300; color: var(--gray-text); letter-spacing: 0.08em;
}
.hero-scroll-indicator {
    position: absolute; bottom: calc(var(--grid) * 8); left: 50%; transform: translateX(-50%);
    display: flex; flex-direction: column; align-items: center; gap: calc(var(--grid) * 2); z-index: 1;
}
.hero-scroll-indicator .scroll-line {
    width: 1px; height: 60px;
    background: linear-gradient(to bottom, rgba(255,255,255,0.4), transparent);
}

/* ─── Problem Section ─── */
.section-problem .problem-statements { display: flex; flex-direction: column; gap: calc(var(--grid) * 6); }
/* Default: fully visible. JS sets to 0.15 for scrub animation */
.section-problem .statement {
    font-family: var(--font-sans); font-size: var(--type-h1); font-weight: 800;
    letter-spacing: -0.03em; line-height: 1.05; color: var(--white); opacity: 1;
}
body.js-loaded .section-problem .statement {
    opacity: 0.15;
}

/* ─── Method Section ─── */
.section-method {
    min-height: 100vh; display: flex; flex-direction: column;
    align-items: center; justify-content: center; text-align: center; overflow: hidden;
}
.method-visual { display: flex; justify-content: center; margin-bottom: calc(var(--grid) * 6); }
.fn-key-svg { width: 100%; max-width: 300px; height: auto; }
.method-words { display: flex; flex-wrap: wrap; gap: calc(var(--grid) * 2); justify-content: center; }
.method-word {
    font-family: var(--font-sans); font-size: var(--type-display); font-weight: 800;
    letter-spacing: -0.04em; line-height: 1; opacity: 0; transform: translateY(40px);
}
.method-word.active { opacity: 1; transform: translateY(0); }
.method-progress { position: absolute; bottom: 0; left: 0; right: 0; height: 2px; background: var(--gray-dim); }
.method-progress-fill { height: 100%; width: 0%; background: var(--white); }

/* ─── Feature Section — Horizontal Scroll ─── */
.section-features { padding-top: var(--space-section); padding-bottom: 0; overflow: hidden; }
.section-features .section-top {
    padding: 0 calc(var(--grid) * 5); max-width: var(--max-w); margin: 0 auto calc(var(--grid) * 4);
}
.feature-counter {
    font-family: var(--font-mono); font-size: var(--type-mono-sm);
    letter-spacing: 0.1em; color: var(--gray-mid); margin-top: calc(var(--grid) * 3);
}
.feature-counter .current { color: var(--white); }

/* No-JS fallback: wrap cards so they're all visible */
.features-track {
    display: flex; gap: calc(var(--grid) * 3);
    padding: calc(var(--grid) * 8) calc(var(--grid) * 5);
    width: max-content;
    flex-wrap: wrap;
}
/* JS enables horizontal scroll by removing wrap */
body.js-loaded .features-track {
    flex-wrap: nowrap;
}
.feature-card {
    width: 380px; flex-shrink: 0; border: 1px solid transparent;
    padding: calc(var(--grid) * 5); position: relative; overflow: hidden;
    transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
    cursor: default;
}
.feature-card:hover { border-color: rgba(255,255,255,0.15); transform: translateY(-2px); }
.feature-card::before {
    content: ''; position: absolute; inset: 0;
    background: radial-gradient(circle at var(--mx, 50%) var(--my, 50%), rgba(255,255,255,0.03), transparent 50%);
    pointer-events: none; transition: opacity var(--dur); opacity: 0;
}
.feature-card:hover::before { opacity: 1; }
.feature-icon-wrap { width: 48px; height: 48px; margin-bottom: calc(var(--grid) * 3); }
.feature-icon-svg { width: 48px; height: 48px; }
.feature-card h3 { font-family: var(--font-mono); font-size: 1rem; letter-spacing: 0.04em; font-weight: 500; margin-bottom: calc(var(--grid) * 1.5); }
.feature-card p { font-size: 0.9375rem; color: var(--gray-text); line-height: 1.6; }

/* ─── Shortcut Grid ─── */
.shortcut-grid { display: grid; grid-template-columns: 1fr 1fr; gap: calc(var(--grid) * 2); }
.shortcut-card {
    display: flex; align-items: center; gap: calc(var(--grid) * 3);
    padding: calc(var(--grid) * 3.5) calc(var(--grid) * 4);
    border: 1px solid var(--gray-dim);
    transition: border-color var(--dur), background var(--dur); position: relative;
}
.shortcut-card:hover { border-color: rgba(255,255,255,0.2); background: rgba(255,255,255,0.02); }
.shortcut-keys { display: flex; align-items: center; gap: 8px; min-width: 140px; flex-shrink: 0; }
.shortcut-keys kbd {
    font-family: var(--font-mono); font-size: var(--type-caption); font-weight: 500;
    padding: 6px 14px; border: 1px solid rgba(255,255,255,0.2); border-radius: 4px;
    background: rgba(255,255,255,0.04); color: var(--white); line-height: 1.4;
    box-shadow: 0 2px 0 rgba(255,255,255,0.1);
}
.key-plus { font-family: var(--font-mono); font-size: var(--type-mono-sm); color: var(--gray-mid); }
.shortcut-info { display: flex; flex-direction: column; gap: 4px; flex: 1; }
.shortcut-action { font-family: var(--font-sans); font-size: 1rem; font-weight: 500; }
.shortcut-desc { font-family: var(--font-mono); font-size: var(--type-mono-sm); color: var(--gray-text); }
.shortcut-indicator { width: 6px; height: 6px; flex-shrink: 0; }

/* ─── What It Is / Is Not ─── */
.dual-grid {
    display: grid; grid-template-columns: 1fr 1fr;
    gap: calc(var(--grid) * 12); margin-top: calc(var(--grid) * 8); position: relative;
}
.dual-grid::before {
    content: ''; position: absolute; left: 50%; top: 0; bottom: 0;
    width: 1px; background: var(--gray-dim); transform: translateX(-50%);
}
.dual-grid .col h3 {
    font-family: var(--font-sans); font-size: var(--type-h2); font-weight: 700;
    letter-spacing: -0.02em; text-transform: none; color: var(--white);
    padding-bottom: calc(var(--grid) * 3); border-bottom: 1px solid var(--gray-dim);
    margin-bottom: calc(var(--grid) * 4);
}
.dual-grid ul { list-style: none; display: flex; flex-direction: column; gap: calc(var(--grid) * 3); }
.dual-grid li {
    font-family: var(--font-mono); font-size: 1rem; font-weight: 300;
    color: var(--gray-text); display: flex; align-items: center; gap: 12px;
    transition: color var(--dur);
}
.dual-grid li:hover { color: var(--white); }
.dual-grid li .icon { font-size: var(--type-caption); flex-shrink: 0; }
.col-yes li .icon { color: var(--white); }
.col-no li .icon { color: var(--gray-mid); }

/* ─── Marquee Band ─── */
.marquee-band {
    overflow: hidden; white-space: nowrap;
    border-top: 1px solid var(--gray-dim); border-bottom: 1px solid var(--gray-dim);
    padding: calc(var(--grid) * 3) 0;
}
.marquee-track {
    display: inline-block; animation: marquee 25s linear infinite;
    font-family: var(--font-mono); font-size: clamp(0.875rem, 1.5vw, 1.25rem);
    letter-spacing: 0.15em; text-transform: uppercase; color: var(--gray-mid);
}
@keyframes marquee { 0% { transform: translateX(0); } 100% { transform: translateX(-50%); } }

/* ─── Buttons ─── */
.btn {
    display: inline-flex; align-items: center; gap: calc(var(--grid) * 1);
    font-family: var(--font-mono); font-size: 0.9375rem; font-weight: 500;
    padding: calc(var(--grid) * 2) calc(var(--grid) * 4);
    border: 1px solid var(--white); background: transparent;
    color: var(--white); cursor: pointer;
    transition: color 0.5s var(--ease-expo), opacity var(--dur) var(--ease);
    text-decoration: none; border-bottom: 1px solid var(--white);
    position: relative; overflow: hidden;
}
.btn::before {
    content: ''; position: absolute; inset: 0; background: var(--white);
    transform: scaleX(0); transform-origin: left;
    transition: transform 0.5s var(--ease-expo); z-index: 0;
}
.btn:hover::before { transform: scaleX(1); }
.btn:hover { color: var(--black); opacity: 1; }
.btn span { position: relative; z-index: 1; }
.btn-filled { background: var(--white); color: var(--black); }
.btn-filled::before { background: var(--black); }
.btn-filled:hover { color: var(--white); }

/* ─── Install Section ─── */
.section-install { text-align: center; padding: var(--space-section-lg) 0; }
.section-install h2 {
    font-size: var(--type-display); font-weight: 800;
    letter-spacing: -0.05em; line-height: 0.95;
}
.install-steps {
    display: flex; flex-direction: column; gap: calc(var(--grid) * 3);
    max-width: 520px; margin: 0 auto; text-align: left;
}
.install-step {
    display: flex; align-items: center; gap: calc(var(--grid) * 3);
    font-family: var(--font-mono); font-size: 0.9375rem; color: var(--gray-text);
}
.step-num {
    width: 40px; height: 40px; border: 1px solid var(--gray-dim); border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    flex-shrink: 0; font-size: var(--type-caption); color: var(--white);
    font-family: var(--font-mono);
}

/* ─── FAQ Section ─── */
.faq-list { max-width: var(--max-w-narrow); margin: 0 auto; text-align: left; }
.faq-item {
    margin-bottom: calc(var(--grid) * 4); border-bottom: 1px solid var(--gray-dim);
    padding-bottom: calc(var(--grid) * 4);
}
.faq-item:last-child { border-bottom: none; }
.faq-item h3 {
    font-family: var(--font-sans); font-size: var(--type-h3); font-weight: 600;
    margin-bottom: calc(var(--grid) * 2);
}
.faq-item p { color: var(--gray-text); font-size: var(--type-body); line-height: 1.7; }

/* ─── Footer ─── */
footer {
    padding: calc(var(--grid) * 16) 0 calc(var(--grid) * 8);
    border-top: 1px solid var(--gray-dim); position: relative;
}
.footer-watermark {
    font-family: var(--font-sans); font-size: var(--type-display); font-weight: 800;
    letter-spacing: -0.05em; color: rgba(255,255,255,0.03); text-align: center;
    margin-bottom: calc(var(--grid) * 8); line-height: 1; user-select: none;
}
footer .container { display: flex; justify-content: space-between; align-items: center; }
footer .footer-links { display: flex; gap: calc(var(--grid) * 4); align-items: center; }
footer .footer-links a { font-family: var(--font-mono); font-size: var(--type-caption); border-bottom: none; }
footer .copyright { font-family: var(--font-mono); font-size: var(--type-mono-sm); color: var(--gray-mid); }

/* ─── Back to Top ─── */
.back-to-top {
    position: fixed; bottom: calc(var(--grid) * 4); right: calc(var(--grid) * 4);
    width: 44px; height: 44px; border: 1px solid var(--gray-dim);
    background: rgba(0,0,0,0.8); backdrop-filter: blur(10px);
    color: var(--white); display: flex; align-items: center; justify-content: center;
    cursor: pointer; z-index: 90; opacity: 0; pointer-events: none;
    transform: translateY(10px);
    transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease),
                background var(--dur) var(--ease), color var(--dur) var(--ease);
    font-size: 1rem; border-bottom: none;
}
.back-to-top.visible { opacity: 1; pointer-events: auto; transform: translateY(0); }
.back-to-top:hover { background: var(--white); color: var(--black); border-color: var(--white); }

/* ─── Utility ─── */
.text-center { text-align: center; }
.mt-1 { margin-top: calc(var(--grid) * 1); }
.mt-2 { margin-top: calc(var(--grid) * 2); }
.mt-3 { margin-top: calc(var(--grid) * 3); }
.mt-4 { margin-top: calc(var(--grid) * 4); }
.mt-6 { margin-top: calc(var(--grid) * 6); }
.mt-8 { margin-top: calc(var(--grid) * 8); }
.mb-2 { margin-bottom: calc(var(--grid) * 2); }
.mb-4 { margin-bottom: calc(var(--grid) * 4); }

/* ─── Responsive ─── */
@media (max-width: 1024px) {
    :root {
        --space-section: clamp(80px, 10vh, 160px);
        --space-section-lg: clamp(100px, 12vh, 200px);
    }
    .features-track { flex-wrap: wrap; width: auto; justify-content: center; }
    .feature-card { width: calc(50% - var(--grid) * 2); }
    .feature-counter { display: none; }
}

@media (max-width: 768px) {
    :root {
        --space-section: clamp(64px, 8vh, 120px);
        --space-section-lg: clamp(80px, 10vh, 160px);
    }
    .dual-grid { grid-template-columns: 1fr; gap: calc(var(--grid) * 8); }
    .dual-grid::before { display: none; }
    .shortcut-grid { grid-template-columns: 1fr; }
    .feature-card { width: 100%; }
    .features-track { flex-direction: column; width: auto; padding: calc(var(--grid) * 6) calc(var(--grid) * 5); }
    .section-nav { display: none; }
    .shortcut-keys { min-width: 100px; }
    nav .container { height: 60px; }
    .spacer-nav { height: 60px; }
    .hero-scroll-indicator { display: none; }
}

@media (max-width: 480px) {
    .container, .container-narrow { padding: 0 calc(var(--grid) * 3); }
    nav .links { gap: calc(var(--grid) * 2); }
    footer .container { flex-direction: column; gap: calc(var(--grid) * 3); text-align: center; }
    .shortcut-keys { min-width: 80px; }
    .hero-headline { font-size: clamp(2rem, 8vw, 2.5rem); }
    .section-problem .statement { font-size: clamp(1.75rem, 6vw, 2.5rem); }
    .section-install h2 { font-size: clamp(2rem, 8vw, 2.5rem); }
}