/* ============================================================
   NEO SSH-Win Manager — Showcase Website
   Stylesheet (Dark + Light), inspired by app theme.py
   ============================================================ */

:root {
  /* Brand */
  --accent: #00b4d8;
  --accent-2: #0077b6;
  --accent-soft: rgba(0, 180, 216, 0.12);
  --accent-border: rgba(0, 180, 216, 0.35);
  --ok: #00d464;
  --warn: #f59e0b;
  --err: #ef4444;

  /* Mono font stack */
  --mono: "JetBrains Mono", "Fira Code", ui-monospace, "Cascadia Mono",
          "SF Mono", Menlo, Consolas, monospace;
  --sans: "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;
}

/* Dark (default) — values lifted from src/ui/theme.py */
:root,
[data-theme="dark"] {
  --bg-0: #0a0a0f;        /* deepest */
  --bg-1: #0d0d12;        /* main bg */
  --bg-2: #0f0f1a;        /* tabs / pane */
  --bg-3: #14141f;        /* card */
  --bg-4: #1a1a2e;        /* hover / sidebar */
  --bg-code: #08080c;
  --border: #1e1e30;
  --border-strong: #2a2a4a;
  --text: #e4eaf0;
  --text-2: #c8d6e5;
  --text-3: #8b949e;
  --text-4: #556070;
  --text-faint: #3f4e5e;
  --link: #58a6ff;

  --shadow-card: 0 1px 0 rgba(255, 255, 255, 0.02) inset,
                 0 24px 60px -30px rgba(0, 0, 0, 0.7);
  --grid-line: rgba(255, 255, 255, 0.035);
}

[data-theme="light"] {
  --bg-0: #e4e8ef;
  --bg-1: #f0f2f5;
  --bg-2: #f8fafc;
  --bg-3: #ffffff;
  --bg-4: #eef2f7;
  --bg-code: #0f1218;     /* keep code blocks dark in light mode */
  --border: #d0d8e4;
  --border-strong: #a8c0d8;
  --text: #1a2332;
  --text-2: #2a3a4a;
  --text-3: #4a5a6a;
  --text-4: #6a7a8a;
  --text-faint: #9aacbe;
  --link: #0077b6;
  --accent: #0077b6;
  --accent-2: #00b4d8;
  --accent-soft: rgba(0, 119, 182, 0.10);
  --accent-border: rgba(0, 119, 182, 0.35);

  --shadow-card: 0 1px 2px rgba(15, 23, 42, 0.04),
                 0 12px 40px -20px rgba(15, 23, 42, 0.18);
  --grid-line: rgba(15, 23, 42, 0.05);
}

/* ----------------------------------------------------------- */
/* Reset                                                        */
/* ----------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg-1);
  color: var(--text-2);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
a { color: var(--link); text-decoration: none; }
a:hover { color: var(--accent); }
img, svg { max-width: 100%; display: block; }
button { font: inherit; cursor: pointer; }
code, pre, kbd { font-family: var(--mono); }
::selection { background: var(--accent); color: #0a0a0f; }

/* ----------------------------------------------------------- */
/* Layout                                                       */
/* ----------------------------------------------------------- */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
.container-narrow {
  max-width: 880px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ----------------------------------------------------------- */
/* Top Bar                                                      */
/* ----------------------------------------------------------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in oklab, var(--bg-1) 88%, transparent);
  backdrop-filter: saturate(140%) blur(10px);
  -webkit-backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--border);
}
.topbar-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  height: 60px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 600;
  letter-spacing: 0.01em;
}
.brand-mark {
  width: 32px; height: 32px;
  display: block;
  object-fit: contain;
  filter: drop-shadow(0 4px 14px rgba(0, 180, 216, 0.45));
}
.brand-name { font-family: var(--sans); }
.brand-name b { color: var(--text); }
.brand-name span { color: var(--text-3); font-weight: 500; }

.nav {
  display: flex;
  gap: 4px;
  margin-left: 12px;
}
.nav a {
  color: var(--text-3);
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
}
.nav a:hover { color: var(--text); background: var(--bg-3); }
.nav a.active { color: var(--accent); background: var(--accent-soft); }

.topbar-actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 8px;
}
.icon-btn {
  width: 36px; height: 36px;
  border-radius: 8px;
  background: var(--bg-3);
  border: 1px solid var(--border);
  color: var(--text-3);
  display: grid; place-items: center;
  transition: all 0.15s;
}
.icon-btn:hover {
  background: var(--bg-4);
  border-color: var(--border-strong);
  color: var(--text);
}
.icon-btn svg { width: 16px; height: 16px; }

.menu-btn { display: none; }

/* ----------------------------------------------------------- */
/* Language switch                                              */
/* ----------------------------------------------------------- */
.lang-switch {
  display: inline-flex;
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 2px;
  height: 36px;
  box-sizing: border-box;
}
.lang-switch button {
  appearance: none;
  background: transparent;
  border: 0;
  color: var(--text-3);
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  padding: 0 10px;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.15s;
  min-width: 30px;
}
.lang-switch button:hover { color: var(--text); }
.lang-switch button.active {
  background: var(--bg-4);
  color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent-border) inset;
}

/* ----------------------------------------------------------- */
/* Buttons                                                      */
/* ----------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  border: 1px solid var(--border);
  background: var(--bg-3);
  color: var(--text);
  transition: all 0.15s ease;
  text-decoration: none;
  white-space: nowrap;
}
.btn:hover {
  border-color: var(--border-strong);
  background: var(--bg-4);
  color: var(--text);
}
.btn svg { width: 16px; height: 16px; }
.btn-primary {
  background: linear-gradient(180deg, var(--accent), var(--accent-2));
  color: #fff;
  border: 1px solid transparent;
  box-shadow: 0 1px 0 rgba(255,255,255,0.18) inset,
              0 8px 24px -8px rgba(0, 180, 216, 0.6);
}
.btn-primary:hover {
  color: #fff;
  filter: brightness(1.08);
}
.btn-ghost {
  background: transparent;
}
.btn-sm { padding: 7px 11px; font-size: 13px; }
.btn-lg { padding: 13px 20px; font-size: 15px; }

/* ----------------------------------------------------------- */
/* Hero                                                         */
/* ----------------------------------------------------------- */
.hero {
  position: relative;
  padding: 72px 0 56px;
  border-bottom: 1px solid var(--border);
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute; inset: 0;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 30%, transparent 75%);
  pointer-events: none;
}
.hero::after {
  content: "";
  position: absolute;
  top: -120px; left: 50%;
  width: 600px; height: 360px;
  transform: translateX(-50%);
  background: radial-gradient(closest-side, rgba(0, 180, 216, 0.25), transparent 70%);
  filter: blur(20px);
  pointer-events: none;
}
.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 56px;
  align-items: center;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid var(--accent-border);
  padding: 5px 10px;
  border-radius: 999px;
}
.eyebrow .dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--ok);
  box-shadow: 0 0 0 3px rgba(0, 212, 100, 0.18);
}
.hero h1 {
  font-size: clamp(34px, 5vw, 56px);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--text);
  margin: 18px 0 14px;
}
.hero h1 .accent {
  background: linear-gradient(180deg, var(--accent) 30%, var(--accent-2));
  -webkit-background-clip: text; background-clip: text;
  color: transparent;
}
.hero p.lead {
  font-size: 17px;
  color: var(--text-3);
  max-width: 560px;
  margin: 0 0 28px;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 22px;
}
.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 22px;
  color: var(--text-4);
  font-size: 13px;
}
.hero-meta .meta-item {
  display: inline-flex; align-items: center; gap: 8px;
}
.hero-meta svg { width: 14px; height: 14px; color: var(--accent); }

/* App preview frame in hero */
.app-frame {
  position: relative;
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: var(--shadow-card),
              0 0 0 1px rgba(0, 180, 216, 0.06),
              0 60px 100px -50px rgba(0, 180, 216, 0.25);
  overflow: hidden;
}
.app-frame .titlebar {
  display: flex; align-items: center; gap: 8px;
  padding: 10px 14px;
  background: var(--bg-4);
  border-bottom: 1px solid var(--border);
  font-family: var(--mono); font-size: 11px; color: var(--text-4);
}
.app-frame .titlebar .dots {
  display: flex; gap: 6px; margin-right: 10px;
}
.app-frame .titlebar .dots span {
  width: 11px; height: 11px; border-radius: 50%;
  background: var(--text-faint); opacity: 0.45;
}

/* ----------------------------------------------------------- */
/* Sections                                                     */
/* ----------------------------------------------------------- */
.section {
  padding: 72px 0;
  border-bottom: 1px solid var(--border);
}
.section-title {
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.01em;
  margin: 0 0 6px;
}
.section-sub {
  color: var(--text-3);
  margin: 0 0 36px;
  max-width: 640px;
}
.section-eyebrow {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 12px;
}

/* Cards / grids */
.grid {
  display: grid;
  gap: 16px;
}
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

.card {
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 22px;
  transition: border-color 0.15s, transform 0.15s;
}
.card:hover {
  border-color: var(--border-strong);
}
.card .card-icon {
  width: 36px; height: 36px;
  border-radius: 8px;
  background: var(--accent-soft);
  border: 1px solid var(--accent-border);
  color: var(--accent);
  display: grid; place-items: center;
  margin-bottom: 14px;
}
.card .card-icon svg { width: 18px; height: 18px; }

.card.feature-highlight {
  border-color: var(--accent-border);
  background:
    linear-gradient(180deg, rgba(0, 180, 216, 0.06), transparent 40%),
    var(--bg-3);
  position: relative;
}
.card.feature-highlight::before {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(180deg, var(--accent-border), transparent 60%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
          mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
          mask-composite: exclude;
  pointer-events: none;
}
.card.feature-highlight .card-icon {
  background: linear-gradient(135deg, var(--accent-2), var(--accent));
  color: #fff;
  box-shadow: 0 6px 18px -8px rgba(0, 180, 216, 0.6);
}
.card h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  margin: 0 0 6px;
}
.card p {
  font-size: 14px;
  color: var(--text-3);
  margin: 0;
}

/* ----------------------------------------------------------- */
/* Code blocks                                                  */
/* ----------------------------------------------------------- */
pre {
  background: var(--bg-code);
  color: #c8d6e5;
  border: 1px solid #1a1a2e;
  border-radius: 10px;
  padding: 16px 18px;
  overflow-x: auto;
  font-size: 13px;
  line-height: 1.55;
  margin: 16px 0;
}
:not(pre) > code {
  background: var(--bg-4);
  color: var(--accent);
  border: 1px solid var(--border);
  padding: 1px 6px;
  border-radius: 5px;
  font-size: 0.88em;
}
pre code { color: inherit; background: none; border: none; padding: 0; }

/* ----------------------------------------------------------- */
/* Docs layout                                                  */
/* ----------------------------------------------------------- */
.docs {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 48px;
  padding: 36px 0 72px;
}
.docs-side {
  position: sticky;
  top: 80px;
  align-self: start;
  max-height: calc(100vh - 100px);
  overflow-y: auto;
  padding-right: 8px;
  font-size: 14px;
}
.docs-side .group {
  margin-bottom: 22px;
}
.docs-side .group-title {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-4);
  margin: 0 0 8px;
  padding-left: 10px;
}
.docs-side a {
  display: block;
  padding: 6px 10px;
  border-radius: 6px;
  color: var(--text-3);
  font-weight: 500;
}
.docs-side a:hover { background: var(--bg-3); color: var(--text); }
.docs-side a.active {
  background: var(--accent-soft);
  color: var(--accent);
  border-left: 2px solid var(--accent);
  padding-left: 8px;
}

.docs-main {
  min-width: 0;
}
.docs-main h1 {
  font-size: clamp(28px, 3vw, 36px);
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.01em;
  margin: 0 0 8px;
}
.docs-main > .lead {
  color: var(--text-3);
  font-size: 16px;
  margin: 0 0 32px;
}
.docs-main h2 {
  font-size: 22px;
  font-weight: 700;
  color: var(--text);
  margin: 40px 0 8px;
  letter-spacing: -0.005em;
}
.docs-main h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  margin: 28px 0 6px;
}
.docs-main p { color: var(--text-2); margin: 10px 0; }
.docs-main ul, .docs-main ol {
  color: var(--text-2);
  padding-left: 22px;
}
.docs-main li { margin: 5px 0; }
.docs-main hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 36px 0;
}

.callout {
  display: flex;
  gap: 12px;
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  background: var(--bg-3);
  border-radius: 8px;
  margin: 18px 0;
  font-size: 14px;
  color: var(--text-2);
}
.callout.warn { border-left-color: var(--warn); }
.callout.warn .callout-icon { color: var(--warn); }
.callout.danger { border-left-color: var(--err); }
.callout.danger .callout-icon { color: var(--err); }
.callout-icon { color: var(--accent); flex: none; }
.callout-icon svg { width: 18px; height: 18px; margin-top: 2px; }
.callout strong { color: var(--text); }

/* Tables */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
  font-size: 14px;
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}
th, td {
  text-align: left;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
th {
  background: var(--bg-4);
  color: var(--text);
  font-weight: 600;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
tr:last-child td { border-bottom: none; }
td code { white-space: nowrap; }

/* ----------------------------------------------------------- */
/* App mockup (used in hero)                                    */
/* ----------------------------------------------------------- */
.app-mockup { font-family: var(--sans); font-size: 12px; }
.app-mockup .app-body {
  display: grid;
  grid-template-columns: 56px 1fr 180px;
  height: 360px;
}
.app-mockup .sidebar {
  background: var(--bg-1);
  border-right: 1px solid var(--border);
  padding: 14px 8px;
  display: flex; flex-direction: column; gap: 8px; align-items: center;
}
.app-mockup .side-icon {
  width: 36px; height: 36px;
  border-radius: 8px;
  background: var(--bg-3);
  border: 1px solid var(--border);
  display: grid; place-items: center;
  color: var(--text-4);
}
.app-mockup .side-icon.active {
  background: var(--accent-soft);
  border-color: var(--accent-border);
  color: var(--accent);
}
.app-mockup .side-icon svg { width: 16px; height: 16px; }
.app-mockup .main {
  padding: 14px;
  background: var(--bg-1);
  overflow: hidden;
}
.app-mockup .main-head {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 12px;
}
.app-mockup .main-head .title {
  color: var(--text); font-weight: 600; font-size: 13px;
}
.app-mockup .pill {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 3px 8px;
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--text-3);
  font-family: var(--mono); font-size: 10px;
}
.app-mockup .conn-row {
  display: grid;
  grid-template-columns: 22px 1fr auto auto;
  gap: 10px;
  align-items: center;
  padding: 10px 12px;
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: 10px;
  margin-bottom: 8px;
}
.app-mockup .conn-row.mounted {
  border-color: var(--accent-border);
  background: color-mix(in oklab, var(--bg-3) 80%, var(--accent-soft));
}
.app-mockup .conn-row .conn-icon {
  width: 22px; height: 22px;
  display: grid; place-items: center;
  color: var(--text-4);
}
.app-mockup .conn-row.mounted .conn-icon { color: var(--accent); }
.app-mockup .conn-row .conn-icon svg { width: 16px; height: 16px; }
.app-mockup .conn-row .conn-name {
  color: var(--text); font-weight: 600; font-size: 12px;
}
.app-mockup .conn-row .conn-host {
  color: var(--text-4); font-family: var(--mono); font-size: 10px;
}
.app-mockup .conn-row .drive {
  font-family: var(--mono); font-size: 10px; font-weight: 700;
  padding: 2px 7px;
  border-radius: 5px;
  background: var(--bg-4);
  color: var(--accent);
  border: 1px solid var(--accent-border);
}
.app-mockup .conn-row.mounted .drive {
  background: rgba(0, 212, 100, 0.10);
  color: var(--ok);
  border-color: var(--ok);
}
.app-mockup .conn-row .toggle {
  width: 26px; height: 26px;
  border-radius: 50%;
  border: 1px solid var(--border-strong);
  background: var(--bg-4);
  color: var(--text-3);
  display: grid; place-items: center;
}
.app-mockup .conn-row.mounted .toggle {
  background: rgba(0, 212, 100, 0.12);
  border-color: var(--ok);
  color: var(--ok);
}
.app-mockup .right {
  background: var(--bg-1);
  border-left: 1px solid var(--border);
  padding: 14px 12px;
  font-size: 11px;
}
.app-mockup .right .sec-title {
  color: var(--accent);
  font-family: var(--mono);
  font-size: 9px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin: 0 0 6px;
}
.app-mockup .stat {
  display: flex; justify-content: space-between;
  padding: 4px 0;
  color: var(--text-3);
}
.app-mockup .stat span { color: var(--text); font-family: var(--mono); }
.app-mockup .bar {
  height: 4px; background: var(--bg-3);
  border-radius: 4px; overflow: hidden;
  margin: 6px 0 12px;
}
.app-mockup .bar > i {
  display: block; height: 100%;
  background: linear-gradient(90deg, var(--accent-2), var(--accent));
}
.app-mockup .statusbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 6px 12px;
  background: var(--bg-0);
  border-top: 1px solid var(--border);
  color: var(--text-4);
  font-size: 10px;
  font-family: var(--mono);
}
.app-mockup .status-dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--ok); display: inline-block;
  margin-right: 6px;
  box-shadow: 0 0 8px var(--ok);
}

/* ----------------------------------------------------------- */
/* Logos / footer                                               */
/* ----------------------------------------------------------- */
.footer {
  padding: 44px 0;
  color: var(--text-4);
  font-size: 13px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 32px;
}
.footer h4 {
  color: var(--text);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin: 0 0 12px;
  font-family: var(--mono);
}
.footer ul { list-style: none; padding: 0; margin: 0; }
.footer li { margin: 6px 0; }
.footer a { color: var(--text-3); }
.footer a:hover { color: var(--text); }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 20px;
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px;
}

/* ----------------------------------------------------------- */
/* Tag / badge                                                  */
/* ----------------------------------------------------------- */
.badge {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 2px 8px;
  font-size: 11px;
  font-family: var(--mono);
  background: var(--bg-4);
  color: var(--text-3);
  border: 1px solid var(--border);
  border-radius: 999px;
}
.badge.accent { color: var(--accent); border-color: var(--accent-border); background: var(--accent-soft); }
.badge.ok { color: var(--ok); border-color: rgba(0,212,100,0.4); background: rgba(0,212,100,0.10); }

/* ----------------------------------------------------------- */
/* Responsive                                                   */
/* ----------------------------------------------------------- */
@media (max-width: 960px) {
  .hero-inner { grid-template-columns: 1fr; gap: 36px; }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .docs { grid-template-columns: 1fr; gap: 20px; }
  .docs-side {
    position: static;
    max-height: none;
    border: 1px solid var(--border);
    background: var(--bg-3);
    border-radius: 10px;
    padding: 16px;
  }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .nav { display: none; }
  .menu-btn { display: grid; }
  .nav.open {
    display: flex;
    position: absolute; left: 0; right: 0; top: 60px;
    flex-direction: column;
    background: var(--bg-1);
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
    gap: 2px;
  }
  .nav.open a { padding: 12px 14px; }
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .section { padding: 56px 0; }
  .hero { padding: 48px 0 40px; }
  .app-mockup .app-body { grid-template-columns: 48px 1fr; }
  .app-mockup .right { display: none; }
}