/* =========================================================================
   WinBitTorrent — Fluent / WinUI 3 design system
   ========================================================================= */

/* ----------------------------- Design tokens ---------------------------- */
:root {
  /* Shape */
  --radius-control: 5px;
  --radius-card: 8px;
  --radius-large: 12px;

  /* Motion */
  --ease-standard: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-decel: cubic-bezier(0.1, 0.9, 0.2, 1);
  --dur-fast: 120ms;
  --dur-med: 240ms;
  --dur-slow: 420ms;

  /* Typography */
  --font: "Segoe UI Variable", "Segoe UI", system-ui, -apple-system,
    "Segoe UI Emoji", Roboto, Helvetica, Arial, sans-serif;

  /* Layout */
  --maxw: 1180px;
  --nav-h: 56px;

  color-scheme: light dark;
}

/* Light theme (Fluent light) */
:root,
:root[data-theme="light"] {
  --accent: #0067c0;
  --accent-hover: #1a75c8;
  --accent-press: #005ba1;
  --accent-text: #ffffff;
  --accent-soft: rgba(0, 103, 192, 0.10);

  --bg-base: #f3f3f3;
  --bg-grad-1: #eef3fb;
  --bg-grad-2: #f6f6f7;
  --bg-blob-1: rgba(0, 103, 192, 0.16);
  --bg-blob-2: rgba(76, 194, 255, 0.14);

  --layer: rgba(255, 255, 255, 0.72);
  --layer-solid: #ffffff;
  --layer-alt: rgba(255, 255, 255, 0.55);
  --card-border: rgba(0, 0, 0, 0.06);
  --card-border-strong: rgba(0, 0, 0, 0.12);

  --text-1: #1a1a1a;
  --text-2: #454545;
  --text-3: #6a6a6a;

  --control-bg: rgba(255, 255, 255, 0.70);
  --control-bg-hover: rgba(249, 249, 249, 0.9);
  --control-border: rgba(0, 0, 0, 0.12);

  --shadow-card: 0 2px 6px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-raised: 0 12px 32px rgba(0, 0, 0, 0.12), 0 3px 8px rgba(0, 0, 0, 0.06);
  --shadow-accent: 0 6px 18px rgba(0, 103, 192, 0.30);

  --nav-bg: rgba(243, 243, 243, 0.72);
}

/* Dark theme (Fluent dark) */
:root[data-theme="dark"] {
  --accent: #4cc2ff;
  --accent-hover: #5ec8ff;
  --accent-press: #3aa6e0;
  --accent-text: #00243d;
  --accent-soft: rgba(76, 194, 255, 0.12);

  --bg-base: #1f1f22;
  --bg-grad-1: #23262d;
  --bg-grad-2: #1b1b1e;
  --bg-blob-1: rgba(76, 194, 255, 0.16);
  --bg-blob-2: rgba(0, 103, 192, 0.20);

  --layer: rgba(44, 44, 48, 0.62);
  --layer-solid: #2b2b2f;
  --layer-alt: rgba(255, 255, 255, 0.045);
  --card-border: rgba(255, 255, 255, 0.08);
  --card-border-strong: rgba(255, 255, 255, 0.14);

  --text-1: #f4f4f5;
  --text-2: #c8c8ca;
  --text-3: #9a9a9d;

  --control-bg: rgba(255, 255, 255, 0.06);
  --control-bg-hover: rgba(255, 255, 255, 0.09);
  --control-border: rgba(255, 255, 255, 0.10);

  --shadow-card: 0 2px 8px rgba(0, 0, 0, 0.35);
  --shadow-raised: 0 16px 40px rgba(0, 0, 0, 0.55), 0 4px 10px rgba(0, 0, 0, 0.4);
  --shadow-accent: 0 6px 20px rgba(76, 194, 255, 0.28);

  --nav-bg: rgba(31, 31, 34, 0.68);
}

/* ------------------------------- Base ----------------------------------- */
* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 12px);
}

body {
  margin: 0;
  font-family: var(--font);
  color: var(--text-1);
  background: var(--bg-base);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  transition: background var(--dur-med) var(--ease-standard),
    color var(--dur-med) var(--ease-standard);
}

/* Mica-like layered backdrop */
.backdrop {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(60% 50% at 15% 0%, var(--bg-blob-1), transparent 70%),
    radial-gradient(55% 45% at 90% 10%, var(--bg-blob-2), transparent 70%),
    linear-gradient(180deg, var(--bg-grad-1), var(--bg-grad-2) 60%, var(--bg-base));
  transition: background var(--dur-slow) var(--ease-standard);
}

img {
  max-width: 100%;
  display: block;
}

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

h1, h2, h3 {
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin: 0;
}

.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 84px 0;
}
.section-head {
  max-width: 640px;
  margin: 0 auto 44px;
  text-align: center;
}
.section-head h2 {
  font-size: clamp(1.7rem, 3.6vw, 2.35rem);
  font-weight: 650;
}
.section-head p {
  color: var(--text-2);
  font-size: 1.05rem;
  margin: 12px 0 0;
}
.eyebrow {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 10px;
}

/* ------------------------------ Nav bar --------------------------------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  background: var(--nav-bg);
  backdrop-filter: saturate(160%) blur(24px);
  -webkit-backdrop-filter: saturate(160%) blur(24px);
  border-bottom: 1px solid var(--card-border);
}
.nav .container {
  display: flex;
  align-items: center;
  gap: 16px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 650;
  color: var(--text-1);
  font-size: 1.02rem;
}
.brand:hover {
  text-decoration: none;
}
.brand img {
  width: 26px;
  height: 26px;
}
.nav-links {
  display: flex;
  gap: 4px;
  margin-left: 12px;
}
.nav-link {
  color: var(--text-2);
  padding: 7px 12px;
  border-radius: var(--radius-control);
  font-size: 0.92rem;
  font-weight: 500;
  transition: background var(--dur-fast), color var(--dur-fast);
}
.nav-link:hover {
  background: var(--control-bg-hover);
  color: var(--text-1);
  text-decoration: none;
}
.nav-link.active {
  color: var(--accent);
  background: var(--accent-soft);
}
.nav-tools {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Segmented control (language) */
.segmented {
  display: inline-flex;
  padding: 3px;
  gap: 2px;
  border-radius: var(--radius-control);
  background: var(--control-bg);
  border: 1px solid var(--control-border);
}
.segmented button {
  border: 0;
  background: transparent;
  color: var(--text-2);
  font: inherit;
  font-size: 0.82rem;
  font-weight: 600;
  padding: 4px 9px;
  border-radius: 4px;
  cursor: pointer;
  transition: background var(--dur-fast), color var(--dur-fast);
}
.segmented button.active {
  background: var(--layer-solid);
  color: var(--text-1);
  box-shadow: var(--shadow-card);
}
:root[data-theme="dark"] .segmented button.active {
  background: rgba(255, 255, 255, 0.14);
}

/* Icon button (theme toggle, github) */
.icon-btn {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-control);
  border: 1px solid transparent;
  background: transparent;
  color: var(--text-2);
  cursor: pointer;
  transition: background var(--dur-fast), color var(--dur-fast), transform var(--dur-fast);
}
.icon-btn:hover {
  background: var(--control-bg-hover);
  color: var(--text-1);
}
.icon-btn:active {
  transform: scale(0.92);
}
.icon-btn svg {
  width: 19px;
  height: 19px;
}
.theme-toggle .moon { display: none; }
:root[data-theme="dark"] .theme-toggle .sun { display: none; }
:root[data-theme="dark"] .theme-toggle .moon { display: block; }

/* ------------------------------ Buttons --------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  font: inherit;
  font-size: 0.98rem;
  font-weight: 600;
  padding: 12px 22px;
  border-radius: var(--radius-control);
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform var(--dur-fast) var(--ease-standard),
    background var(--dur-fast), box-shadow var(--dur-med), border-color var(--dur-fast);
  text-decoration: none;
  will-change: transform;
}
.btn:hover { text-decoration: none; }
.btn:active { transform: scale(0.97); }
.btn svg { width: 18px; height: 18px; }

.btn-accent {
  background: linear-gradient(180deg, var(--accent-hover), var(--accent));
  color: var(--accent-text);
  box-shadow: var(--shadow-accent);
}
.btn-accent:hover {
  filter: brightness(1.05);
  box-shadow: var(--shadow-accent), 0 0 0 3px var(--accent-soft);
}
.btn-accent:active { background: var(--accent-press); }

.btn-standard {
  background: var(--control-bg);
  border-color: var(--control-border);
  color: var(--text-1);
  box-shadow: var(--shadow-card);
}
.btn-standard:hover {
  background: var(--control-bg-hover);
  border-color: var(--card-border-strong);
}

.btn-sm {
  padding: 8px 14px;
  font-size: 0.86rem;
  font-weight: 500;
}

/* ------------------------------- Cards ---------------------------------- */
.card {
  background: var(--layer);
  backdrop-filter: blur(20px) saturate(140%);
  -webkit-backdrop-filter: blur(20px) saturate(140%);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
}

/* -------------------------------- Hero ---------------------------------- */
.hero {
  padding: 92px 0 60px;
  text-align: center;
}
.hero-logo {
  width: 96px;
  height: 96px;
  margin: 0 auto 24px;
  filter: drop-shadow(0 10px 26px rgba(0, 103, 192, 0.35));
  animation: float 6s var(--ease-standard) infinite;
}
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-9px); }
}
.hero h1 {
  font-size: clamp(2.6rem, 7vw, 4.2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}
.hero h1 .grad {
  background: linear-gradient(120deg, var(--accent), #4cc2ff);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero .tagline {
  color: var(--text-2);
  font-size: clamp(1.05rem, 2.5vw, 1.3rem);
  max-width: 560px;
  margin: 18px auto 0;
}
.badge-row {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
  margin: 26px 0 8px;
}
.pill {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 0.82rem;
  font-weight: 600;
  padding: 6px 13px;
  border-radius: 999px;
  background: var(--layer-alt);
  border: 1px solid var(--card-border);
  color: var(--text-2);
}
.pill .dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: #2ec16b;
  box-shadow: 0 0 0 3px rgba(46, 193, 107, 0.2);
}
.hero-actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 30px;
}
.subdownloads {
  margin-top: 16px;
  font-size: 0.85rem;
  color: var(--text-3);
  display: flex;
  gap: 8px;
  justify-content: center;
  flex-wrap: wrap;
}
.subdownloads a { font-weight: 500; }

/* ------------------------- Screenshot showcase -------------------------- */
.showcase { padding-bottom: 20px; }
.showcase-shot {
  max-width: 1080px;
  margin: 0 auto;
}
.showcase-shot img {
  width: 100%;
  height: auto;
  filter: drop-shadow(0 18px 40px rgba(0, 0, 0, 0.18));
  animation: fadeShot var(--dur-slow) var(--ease-standard);
}
:root[data-theme="dark"] .showcase-shot img {
  filter: drop-shadow(0 18px 44px rgba(0, 0, 0, 0.45));
}
/* Swap screenshot to match the active site theme */
.shot-light { display: none; }
.shot-dark { display: block; }
:root[data-theme="light"] .shot-light { display: block; }
:root[data-theme="light"] .shot-dark { display: none; }
@keyframes fadeShot { from { opacity: 0; } to { opacity: 1; } }

/* ----------------------------- Feature grid ----------------------------- */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 18px;
}
.feature {
  padding: 26px;
  transition: transform var(--dur-med) var(--ease-standard),
    box-shadow var(--dur-med), border-color var(--dur-med);
}
.feature:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-raised);
  border-color: var(--card-border-strong);
}
.feature .ico {
  width: 46px;
  height: 46px;
  border-radius: 11px;
  display: grid;
  place-items: center;
  margin-bottom: 16px;
  background: var(--accent-soft);
  color: var(--accent);
}
.feature .ico svg { width: 24px; height: 24px; }
.feature h3 {
  font-size: 1.12rem;
  font-weight: 640;
  margin-bottom: 8px;
}
.feature p {
  color: var(--text-2);
  font-size: 0.95rem;
  margin: 0;
}

/* ---------------------------- RuTracker band ---------------------------- */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}
.split .txt h2 {
  font-size: clamp(1.6rem, 3.4vw, 2.2rem);
  font-weight: 650;
}
.split .txt p {
  color: var(--text-2);
  font-size: 1.02rem;
  margin: 14px 0 0;
}
.check-list {
  list-style: none;
  padding: 0;
  margin: 22px 0 0;
  display: grid;
  gap: 12px;
}
.check-list li {
  display: flex;
  gap: 11px;
  align-items: flex-start;
  color: var(--text-2);
  font-size: 0.98rem;
}
.check-list .ck {
  flex: 0 0 auto;
  width: 22px; height: 22px;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent);
  display: grid; place-items: center;
  margin-top: 1px;
}
.check-list .ck svg { width: 13px; height: 13px; }
.ru-shots {
  display: grid;
  gap: 16px;
}
.ru-shots img {
  border-radius: var(--radius-card);
  border: 1px solid var(--card-border-strong);
  box-shadow: var(--shadow-card);
}

/* ------------------------------ Tech stack ------------------------------ */
.tech-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
}
.tech-chip {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 22px;
  min-width: 200px;
}
.tech-chip .k { font-size: 0.78rem; color: var(--text-3); font-weight: 600; }
.tech-chip .v { font-size: 1.02rem; color: var(--text-1); font-weight: 650; }
.tech-chip .tech-ico {
  width: 40px; height: 40px; border-radius: 10px;
  display: grid; place-items: center;
  background: var(--accent-soft); color: var(--accent);
}
.tech-chip .tech-ico svg { width: 22px; height: 22px; }

/* -------------------------------- Info ---------------------------------- */
.info-card {
  padding: 32px 36px;
  max-width: 820px;
  margin: 0 auto;
}
.info-card h3 {
  font-size: 1.2rem;
  font-weight: 640;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.info-card h3 svg { width: 20px; height: 20px; color: var(--accent); }
.info-card ul { margin: 0; padding-left: 20px; color: var(--text-2); }
.info-card li { margin: 7px 0; }
.warn {
  margin-top: 22px;
  padding: 16px 18px;
  border-radius: var(--radius-control);
  background: rgba(255, 176, 32, 0.12);
  border: 1px solid rgba(255, 176, 32, 0.35);
  color: var(--text-2);
  font-size: 0.92rem;
  display: flex;
  gap: 12px;
}
.warn svg { flex: 0 0 auto; width: 20px; height: 20px; color: #e0930a; margin-top: 2px; }

/* ------------------------------- Footer --------------------------------- */
.footer {
  border-top: 1px solid var(--card-border);
  background: var(--layer-alt);
  padding: 44px 0;
  margin-top: 40px;
}
.footer .container {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  justify-content: space-between;
  align-items: flex-start;
}
.footer .brand { margin-bottom: 10px; }
.footer .muted { color: var(--text-3); font-size: 0.88rem; max-width: 420px; }
.footer .flinks {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.footer .flinks a { color: var(--text-2); font-size: 0.92rem; font-weight: 500; }
.footer .flinks a:hover { color: var(--accent); }

/* ------------------------------- Donate --------------------------------- */
.donate-hero {
  padding: 80px 0 20px;
  text-align: center;
}
.donate-hero .heart {
  width: 70px; height: 70px; margin: 0 auto 20px;
  border-radius: 18px;
  display: grid; place-items: center;
  background: linear-gradient(135deg, #ff5a7a, #ff2e63);
  box-shadow: 0 12px 30px rgba(255, 46, 99, 0.35);
}
.donate-hero .heart svg { width: 34px; height: 34px; color: #fff; }
.donate-hero h1 { font-size: clamp(2rem, 5vw, 2.9rem); font-weight: 700; }
.donate-hero p { color: var(--text-2); max-width: 560px; margin: 16px auto 0; font-size: 1.08rem; }

.donate-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 18px;
  max-width: 900px;
  margin: 40px auto 0;
}
.donate-card {
  padding: 26px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.donate-card .top {
  display: flex;
  align-items: center;
  gap: 13px;
}
.donate-card .brand-ico {
  width: 46px; height: 46px; border-radius: 11px;
  display: grid; place-items: center;
  font-weight: 800; font-size: 0.95rem;
  color: #fff;
}
.donate-card .brand-ico svg { width: 24px; height: 24px; }
.donate-card .brand-ico.yoo { background: linear-gradient(135deg, #8b3ffd, #6d28d9); }
.donate-card .brand-ico.btc { background: linear-gradient(135deg, #f7931a, #d97706); }
.donate-card .brand-ico.eth { background: linear-gradient(135deg, #8a92f0, #627eea); }
.donate-card .brand-ico.sol { background: linear-gradient(135deg, #9945ff, #14f195); }
.donate-card .brand-ico.trx { background: linear-gradient(135deg, #ef2b3d, #c8001f); }
.donate-card .brand-ico.usdt { background: linear-gradient(135deg, #26a17b, #1a8f6a); }
.donate-btn { width: 100%; margin-top: auto; }
.donate-card h3 { font-size: 1.15rem; font-weight: 650; }
.donate-card .sub { font-size: 0.82rem; color: var(--text-3); }
.placeholder-tag {
  align-self: flex-start;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 3px 8px;
  border-radius: 5px;
  background: rgba(255, 176, 32, 0.15);
  color: #d98a00;
  border: 1px solid rgba(255, 176, 32, 0.35);
}
:root[data-theme="dark"] .placeholder-tag { color: #ffc24b; }

.copy-field {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  border-radius: var(--radius-control);
  background: var(--control-bg);
  border: 1px solid var(--control-border);
}
.copy-field code {
  flex: 1;
  font-family: "Cascadia Code", "Consolas", monospace;
  font-size: 0.82rem;
  color: var(--text-2);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.copy-btn {
  flex: 0 0 auto;
  border: 0;
  background: var(--accent-soft);
  color: var(--accent);
  padding: 7px 9px;
  border-radius: 6px;
  cursor: pointer;
  display: grid;
  place-items: center;
  transition: background var(--dur-fast), transform var(--dur-fast);
}
.copy-btn:hover { background: color-mix(in srgb, var(--accent) 20%, transparent); }
.copy-btn:active { transform: scale(0.9); }
.copy-btn svg { width: 16px; height: 16px; }
.copy-btn.copied { background: #2ec16b; color: #fff; }

.donate-note {
  max-width: 720px;
  margin: 40px auto 0;
  text-align: center;
  color: var(--text-3);
  font-size: 0.92rem;
}

/* ---------------------------- Download modal ----------------------------- */
.dl-modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 300;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: rgba(0, 0, 0, 0);
  backdrop-filter: blur(0px);
  -webkit-backdrop-filter: blur(0px);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity var(--dur-med) var(--ease-standard),
    background var(--dur-med) var(--ease-standard),
    backdrop-filter var(--dur-med) var(--ease-standard),
    visibility 0s linear var(--dur-med);
}
.dl-modal-overlay.is-open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  background: rgba(0, 0, 0, 0.48);
  backdrop-filter: blur(10px) saturate(140%);
  -webkit-backdrop-filter: blur(10px) saturate(140%);
  transition: opacity var(--dur-med) var(--ease-standard),
    background var(--dur-med) var(--ease-standard),
    backdrop-filter var(--dur-med) var(--ease-standard),
    visibility 0s linear 0s;
}
:root[data-theme="dark"] .dl-modal-overlay.is-open { background: rgba(0, 0, 0, 0.62); }

.dl-modal {
  position: relative;
  width: 100%;
  max-width: 460px;
  max-height: calc(100vh - 40px);
  overflow-y: auto;
  background: var(--layer-solid);
  border: 1px solid var(--card-border-strong);
  border-radius: var(--radius-large);
  box-shadow: var(--shadow-raised);
  padding: 30px 26px 24px;
  transform: translateY(18px) scale(0.96);
  opacity: 0;
  transition: transform var(--dur-med) var(--ease-decel), opacity var(--dur-med) var(--ease-decel);
}
.dl-modal-overlay.is-open .dl-modal {
  transform: translateY(0) scale(1);
  opacity: 1;
}

.dl-modal-close {
  position: absolute;
  top: 14px;
  right: 14px;
}

.dl-modal-head { text-align: center; }
.dl-modal-icon {
  width: 54px;
  height: 54px;
  margin: 0 auto 16px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: linear-gradient(160deg, var(--accent-hover), var(--accent));
  color: var(--accent-text);
  box-shadow: var(--shadow-accent);
}
.dl-modal-icon svg { width: 26px; height: 26px; }
.dl-modal-head h2 { font-size: 1.28rem; font-weight: 680; }
.dl-modal-head p { color: var(--text-3); font-size: 0.88rem; margin: 6px 0 0; }

.dl-options {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 24px;
}
.dl-option {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 15px;
  border-radius: var(--radius-card);
  border: 1px solid var(--card-border);
  background: var(--control-bg);
  text-decoration: none;
  transition: background var(--dur-fast), border-color var(--dur-fast), transform var(--dur-fast);
}
.dl-option:hover {
  background: var(--control-bg-hover);
  border-color: var(--card-border-strong);
  transform: translateX(2px);
  text-decoration: none;
}
.dl-option:active { transform: scale(0.98); }
.dl-option-ico {
  flex: 0 0 auto;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  background: var(--accent-soft);
  color: var(--accent);
}
.dl-option-ico svg { width: 22px; height: 22px; }
.dl-option-txt { flex: 1; min-width: 0; }
.dl-option-txt h3 { font-size: 0.96rem; font-weight: 640; color: var(--text-1); margin-bottom: 2px; }
.dl-option-txt p { font-size: 0.8rem; color: var(--text-3); margin: 0; line-height: 1.4; }
.dl-option-meta {
  flex: 0 0 auto;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 3px;
}
.dl-option-meta .ext {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 2px 6px;
  border-radius: 4px;
}
.dl-option-meta .size { font-size: 0.76rem; color: var(--text-3); }
.dl-option .chev { flex: 0 0 auto; width: 16px; height: 16px; color: var(--text-3); }

.dl-modal-foot {
  display: flex;
  gap: 9px;
  align-items: flex-start;
  margin-top: 22px;
  padding-top: 16px;
  border-top: 1px solid var(--card-border);
  font-size: 0.8rem;
  color: var(--text-3);
}
.dl-modal-foot svg { flex: 0 0 auto; width: 16px; height: 16px; margin-top: 1px; }

@media (max-width: 480px) {
  .dl-modal { padding: 26px 18px 20px; }
  .dl-option { padding: 12px; gap: 11px; }
  .dl-option-ico { width: 38px; height: 38px; }
}

/* ------------------------------- 404 page ------------------------------- */
.error-page {
  min-height: calc(100vh - var(--nav-h));
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 60px 0;
}
.error-page .inner {
  max-width: 560px;
}
.error-code {
  font-size: clamp(6rem, 22vw, 12rem);
  font-weight: 800;
  line-height: 0.9;
  letter-spacing: -0.04em;
  background: linear-gradient(140deg, var(--accent), #4cc2ff 60%, #8b5cf6);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  filter: drop-shadow(0 14px 40px rgba(0, 103, 192, 0.28));
}
.error-icon {
  width: 60px;
  height: 60px;
  margin: 0 auto 6px;
  border-radius: 16px;
  display: grid;
  place-items: center;
  background: var(--accent-soft);
  color: var(--accent);
  transform: rotate(-8deg);
}
.error-icon svg { width: 30px; height: 30px; }
.error-page h1 {
  font-size: clamp(1.6rem, 4.5vw, 2.4rem);
  font-weight: 700;
  margin-top: 12px;
}
.error-page p {
  color: var(--text-2);
  font-size: 1.05rem;
  margin: 14px auto 0;
  max-width: 440px;
}
.error-actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 30px;
}

/* ---------------------------- Scroll reveal ----------------------------- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--dur-slow) var(--ease-decel),
    transform var(--dur-slow) var(--ease-decel);
}
.reveal.in {
  opacity: 1;
  transform: none;
}

/* ------------------------------ Responsive ------------------------------ */
@media (max-width: 860px) {
  .split { grid-template-columns: 1fr; gap: 28px; }
  .section { padding: 60px 0; }
  .nav-links .nav-link span { display: inline; }
}

@media (max-width: 640px) {
  .container { padding: 0 18px; }
  .brand span { display: none; }
  .nav-links { margin-left: 4px; }
  .nav-link { padding: 7px 9px; font-size: 0.86rem; }
  .nav-tools { gap: 4px; }
  .hero { padding: 60px 0 40px; }
  .hero-actions .btn { width: 100%; }
  .hero-actions { flex-direction: column; }
  .window-bar .title { display: none; }
  .footer .container { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  .reveal { opacity: 1; transform: none; }
  .hero-logo { animation: none; }
}