/* ==========================================================================
   EdgeMirror — design tokens & base
   Style: Dark technical / enterprise gateway
   Typography: JetBrains Mono (code+display) / Inter (body)
   ========================================================================== */

@font-face {
  font-family: "JetBrains Mono";
  src: url("/fonts/jetbrains-mono-latin.woff2") format("woff2");
  font-weight: 100 800;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA,
    U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+2074, U+20AC, U+2122, U+2191,
    U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

@font-face {
  font-family: "Inter";
  src: url("/fonts/inter-latin.woff2") format("woff2");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA,
    U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+2074, U+20AC, U+2122, U+2191,
    U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

:root {
  /* Surfaces — deep navy, layered for depth */
  --bg-base: #070b14;
  --bg-raised: #0b1120;
  --bg-elevated: #111a2e;
  --bg-inset: #050810;

  /* Borders */
  --border-subtle: rgba(148, 163, 184, 0.12);
  --border-default: rgba(148, 163, 184, 0.2);
  --border-strong: rgba(148, 163, 184, 0.34);

  /* Text — all pass 4.5:1 on --bg-base */
  --text-primary: #f1f5f9;
  --text-secondary: #a9b8cc;
  --text-muted: #7c8ba1;

  /* Accent */
  --accent: #38bdf8;
  --accent-strong: #0ea5e9;
  --accent-dim: rgba(56, 189, 248, 0.14);
  --accent-glow: rgba(56, 189, 248, 0.32);

  --ok: #34d399;
  --warn: #fbbf24;
  --err: #f87171;

  /* Type */
  --font-mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI",
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC",
    "Source Han Sans SC", sans-serif;

  /* Space & shape */
  --r-sm: 8px;
  --r-md: 12px;
  --r-lg: 16px;
  --r-xl: 22px;
  --maxw: 1180px;

  /* Motion */
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --fast: 160ms;
  --base: 240ms;

  /* z-index scale */
  --z-base: 1;
  --z-sticky: 10;
  --z-nav: 20;
  --z-overlay: 30;
  --z-modal: 40;
  --z-toast: 50;
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 6rem;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg-base);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* Ambient grid + glow, fixed so it never scrolls away */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(56, 189, 248, 0.13), transparent 70%),
    radial-gradient(ellipse 60% 50% at 80% 0%, rgba(99, 102, 241, 0.08), transparent 70%),
    linear-gradient(to bottom, rgba(148, 163, 184, 0.05) 1px, transparent 1px),
    linear-gradient(to right, rgba(148, 163, 184, 0.05) 1px, transparent 1px);
  background-size: 100% 100%, 100% 100%, 64px 64px, 64px 64px;
  mask-image: linear-gradient(to bottom, black 0%, black 55%, transparent 100%);
  -webkit-mask-image: linear-gradient(to bottom, black 0%, black 55%, transparent 100%);
}

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

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--fast) var(--ease);
}
a:hover {
  color: #7dd3fc;
}

button,
input,
select,
textarea {
  font: inherit;
  color: inherit;
}

/* Focus — always visible, never removed */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

::selection {
  background: var(--accent-glow);
  color: #fff;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  top: -100px;
  left: 1rem;
  z-index: var(--z-toast);
  padding: 0.75rem 1.25rem;
  background: var(--accent);
  color: #050810;
  font-weight: 600;
  border-radius: var(--r-sm);
  transition: top var(--fast) var(--ease);
}
.skip-link:focus {
  top: 1rem;
}

/* ==========================================================================
   Layout
   ========================================================================== */

.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: 1.25rem;
  position: relative;
  z-index: var(--z-base);
}

@media (min-width: 768px) {
  .wrap {
    padding-inline: 2rem;
  }
}

/* ==========================================================================
   Nav — floating pill
   ========================================================================== */

.nav {
  position: fixed;
  top: 1rem;
  left: 1rem;
  right: 1rem;
  z-index: var(--z-nav);
  max-width: var(--maxw);
  margin-inline: auto;
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.6rem 0.75rem 0.6rem 1rem;
  border: 1px solid var(--border-subtle);
  border-radius: 999px;
  background: rgba(11, 17, 32, 0.72);
  backdrop-filter: blur(18px) saturate(160%);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

@supports not (backdrop-filter: blur(1px)) {
  .nav {
    background: rgba(11, 17, 32, 0.97);
  }
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: -0.01em;
  color: var(--text-primary);
  white-space: nowrap;
}
.brand:hover {
  color: var(--text-primary);
}

.brand-mark {
  width: 30px;
  height: 30px;
  flex: none;
  border-radius: 9px;
  background: linear-gradient(145deg, var(--accent), #6366f1);
  display: grid;
  place-items: center;
  box-shadow: 0 0 20px var(--accent-glow);
}
.brand-mark svg {
  width: 17px;
  height: 17px;
  color: #050810;
}

.brand-tag {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  font-weight: 600;
  padding: 0.15rem 0.4rem;
  border-radius: 5px;
  background: var(--accent-dim);
  color: var(--accent);
  border: 1px solid rgba(56, 189, 248, 0.25);
  letter-spacing: 0.03em;
}

.nav-links {
  display: none;
  align-items: center;
  gap: 0.25rem;
  margin-left: auto;
}

@media (min-width: 860px) {
  .nav-links {
    display: flex;
  }
}

.nav-links a {
  padding: 0.45rem 0.85rem;
  border-radius: 999px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--fast) var(--ease), background-color var(--fast) var(--ease);
}
.nav-links a:hover {
  color: var(--text-primary);
  background: rgba(148, 163, 184, 0.1);
}

.nav-status {
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  border: 1px solid var(--border-subtle);
  background: rgba(52, 211, 153, 0.08);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--ok);
  white-space: nowrap;
}

@media (min-width: 860px) {
  .nav-status {
    margin-left: 0;
  }
}

.dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
  box-shadow: 0 0 0 0 currentColor;
  animation: pulse 2.4s var(--ease) infinite;
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(52, 211, 153, 0.55); }
  50% { box-shadow: 0 0 0 5px rgba(52, 211, 153, 0); }
}

.nav-status[data-state="down"] {
  color: var(--err);
  background: rgba(248, 113, 113, 0.08);
}
.nav-status[data-state="checking"] {
  color: var(--warn);
  background: rgba(251, 191, 36, 0.08);
}
.nav-status[data-state="down"] .dot {
  animation: none;
}

/* ==========================================================================
   Hero
   ========================================================================== */

.hero {
  padding: 8.5rem 0 3rem;
  text-align: center;
}

@media (min-width: 768px) {
  .hero {
    padding: 10.5rem 0 4rem;
  }
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.8rem 0.35rem 0.4rem;
  margin-bottom: 1.75rem;
  border: 1px solid var(--border-subtle);
  border-radius: 999px;
  background: rgba(17, 26, 46, 0.7);
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-secondary);
}
.hero-badge strong {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--accent);
  padding: 0.1rem 0.45rem;
  border-radius: 999px;
  background: var(--accent-dim);
  font-size: 0.72rem;
}

.hero h1 {
  margin: 0 0 1.25rem;
  font-size: clamp(2.1rem, 6vw, 3.6rem);
  line-height: 1.08;
  letter-spacing: -0.035em;
  font-weight: 700;
  text-wrap: balance;
}

.hero h1 .grad {
  background: linear-gradient(120deg, #7dd3fc 0%, var(--accent) 35%, #818cf8 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-sub {
  max-width: 62ch;
  margin: 0 auto 2.5rem;
  font-size: clamp(1rem, 2.2vw, 1.125rem);
  line-height: 1.7;
  color: var(--text-secondary);
  text-wrap: pretty;
}

/* ---- Console / input panel ---- */

.console {
  max-width: 860px;
  margin: 0 auto;
  border: 1px solid var(--border-default);
  border-radius: var(--r-xl);
  background: linear-gradient(180deg, rgba(17, 26, 46, 0.92), rgba(11, 17, 32, 0.96));
  box-shadow:
    0 0 0 1px rgba(56, 189, 248, 0.05),
    0 24px 64px -12px rgba(0, 0, 0, 0.7),
    0 0 90px -30px var(--accent-glow);
  overflow: hidden;
  text-align: left;
}

.console-bar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.7rem 1rem;
  border-bottom: 1px solid var(--border-subtle);
  background: rgba(5, 8, 16, 0.5);
}

.console-dots {
  display: flex;
  gap: 6px;
  margin-right: 0.5rem;
}
.console-dots i {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--border-strong);
}
.console-dots i:first-child { background: #ff5f57; }
.console-dots i:nth-child(2) { background: #febc2e; }
.console-dots i:nth-child(3) { background: #28c840; }

.console-title {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--text-muted);
  letter-spacing: 0.02em;
}

.console-tabs {
  display: flex;
  gap: 0.25rem;
  padding: 0.75rem 1rem 0;
  overflow-x: auto;
  scrollbar-width: none;
}
.console-tabs::-webkit-scrollbar {
  display: none;
}

.tab {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.55rem 0.9rem;
  border: 1px solid transparent;
  border-radius: var(--r-sm);
  background: transparent;
  color: var(--text-muted);
  font-size: 0.86rem;
  font-weight: 500;
  white-space: nowrap;
  cursor: pointer;
  transition: color var(--fast) var(--ease), background-color var(--fast) var(--ease),
    border-color var(--fast) var(--ease);
}
.tab svg {
  width: 15px;
  height: 15px;
  flex: none;
}
.tab:hover {
  color: var(--text-primary);
  background: rgba(148, 163, 184, 0.08);
}
.tab[aria-selected="true"] {
  color: var(--accent);
  background: var(--accent-dim);
  border-color: rgba(56, 189, 248, 0.28);
}

.console-body {
  padding: 1rem 1rem 0.75rem;
}

.field {
  display: flex;
  gap: 0.5rem;
  align-items: stretch;
}

.input-shell {
  flex: 1;
  min-width: 0;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0 0.9rem;
  border: 1px solid var(--border-default);
  border-radius: var(--r-md);
  background: var(--bg-inset);
  transition: border-color var(--fast) var(--ease), box-shadow var(--fast) var(--ease);
}
.input-shell:focus-within {
  border-color: rgba(56, 189, 248, 0.55);
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.12);
}
.input-shell > svg {
  width: 16px;
  height: 16px;
  flex: none;
  color: var(--text-muted);
}

.input-shell input {
  flex: 1;
  min-width: 0;
  height: 50px;
  border: 0;
  background: transparent;
  outline: none;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-primary);
}
.input-shell input::placeholder {
  color: #5b6b82;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 50px;
  padding: 0 1.4rem;
  border: 0;
  border-radius: var(--r-md);
  background: linear-gradient(180deg, #38bdf8, #0ea5e9);
  color: #04121c;
  font-size: 0.9rem;
  font-weight: 650;
  cursor: pointer;
  white-space: nowrap;
  transition: transform var(--fast) var(--ease), filter var(--fast) var(--ease),
    box-shadow var(--fast) var(--ease);
  box-shadow: 0 6px 20px -6px rgba(14, 165, 233, 0.7);
}
.btn:hover {
  filter: brightness(1.08);
  box-shadow: 0 8px 26px -6px rgba(14, 165, 233, 0.85);
}
.btn:active {
  transform: translateY(1px) scale(0.995);
}
.btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
  filter: none;
}
.btn svg {
  width: 16px;
  height: 16px;
}

.btn-ghost {
  background: transparent;
  border: 1px solid var(--border-default);
  color: var(--text-secondary);
  box-shadow: none;
  font-weight: 500;
}
.btn-ghost:hover {
  background: rgba(148, 163, 184, 0.08);
  color: var(--text-primary);
  border-color: var(--border-strong);
  box-shadow: none;
}

.btn-sm {
  min-height: 36px;
  padding: 0 0.85rem;
  font-size: 0.8rem;
  border-radius: var(--r-sm);
}

/* ---- output block ---- */

.output {
  margin-top: 0.9rem;
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-md);
  background: var(--bg-inset);
  overflow: hidden;
}

.output[hidden] {
  display: none;
}

.output-head {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.55rem 0.85rem;
  border-bottom: 1px solid var(--border-subtle);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
}
.output-head .spacer {
  margin-left: auto;
}

.output-url {
  padding: 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.6;
  color: #7dd3fc;
  word-break: break-all;
  display: block;
}

.output-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1rem;
  padding: 0.6rem 0.85rem;
  border-top: 1px solid var(--border-subtle);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
}
.output-meta b {
  color: var(--text-secondary);
  font-weight: 500;
}

/* ---- node picker ---- */

.nodes-row {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-top: 0.75rem;
  flex-wrap: wrap;
}

.nodes-label {
  font-size: 0.78rem;
  color: var(--text-muted);
  white-space: nowrap;
}

.node-chips {
  display: flex;
  gap: 0.35rem;
  flex-wrap: wrap;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.32rem 0.65rem;
  border: 1px solid var(--border-subtle);
  border-radius: 999px;
  background: transparent;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  cursor: pointer;
  transition: all var(--fast) var(--ease);
}
.chip:hover {
  border-color: var(--border-strong);
  color: var(--text-secondary);
}
.chip[aria-pressed="true"] {
  border-color: rgba(56, 189, 248, 0.45);
  background: var(--accent-dim);
  color: var(--accent);
}
.chip .lat {
  opacity: 0.7;
  font-size: 0.66rem;
}

/* ---- examples ---- */

.examples {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-wrap: wrap;
  padding: 0.65rem 1rem 0.9rem;
  font-size: 0.78rem;
  color: var(--text-muted);
}

.example-btn {
  padding: 0.25rem 0.6rem;
  border: 1px dashed var(--border-default);
  border-radius: 999px;
  background: transparent;
  color: var(--text-secondary);
  font-size: 0.74rem;
  cursor: pointer;
  transition: all var(--fast) var(--ease);
}
.example-btn:hover {
  border-style: solid;
  border-color: rgba(56, 189, 248, 0.5);
  color: var(--accent);
  background: var(--accent-dim);
}

/* ==========================================================================
   Sections
   ========================================================================== */

section {
  position: relative;
  z-index: var(--z-base);
  padding: 4.5rem 0;
}

@media (min-width: 768px) {
  section {
    padding: 6rem 0;
  }
}

.sec-head {
  max-width: 62ch;
  margin: 0 auto 3rem;
  text-align: center;
}

.sec-eyebrow {
  display: inline-block;
  margin-bottom: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
}

.sec-head h2 {
  margin: 0 0 0.85rem;
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  line-height: 1.2;
  letter-spacing: -0.025em;
  font-weight: 700;
  text-wrap: balance;
}

.sec-head p {
  margin: 0;
  font-size: 1rem;
  color: var(--text-secondary);
  text-wrap: pretty;
}

/* ---- feature grid ---- */

.grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .grid-2 { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 900px) {
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1100px) {
  .grid-4 { grid-template-columns: repeat(4, 1fr); }
}

.card {
  position: relative;
  padding: 1.5rem;
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-lg);
  background: linear-gradient(180deg, rgba(17, 26, 46, 0.6), rgba(11, 17, 32, 0.4));
  transition: border-color var(--base) var(--ease), background-color var(--base) var(--ease),
    transform var(--base) var(--ease);
  cursor: default;
}

.card:hover {
  border-color: var(--border-strong);
  background: linear-gradient(180deg, rgba(17, 26, 46, 0.85), rgba(11, 17, 32, 0.6));
}

.card-icon {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  margin-bottom: 1rem;
  border-radius: var(--r-sm);
  background: var(--accent-dim);
  border: 1px solid rgba(56, 189, 248, 0.22);
  color: var(--accent);
}
.card-icon svg {
  width: 20px;
  height: 20px;
}

.card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.02rem;
  font-weight: 650;
  letter-spacing: -0.01em;
  color: var(--text-primary);
}

.card p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.65;
  color: var(--text-secondary);
}

/* ---- node table ---- */

.node-table {
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-lg);
  overflow: hidden;
  background: rgba(11, 17, 32, 0.5);
}

.node-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.75rem 1rem;
  align-items: center;
  padding: 0.95rem 1.15rem;
  border-bottom: 1px solid var(--border-subtle);
  transition: background-color var(--fast) var(--ease);
}

@media (min-width: 720px) {
  .node-row {
    grid-template-columns: 1.6fr 1fr auto auto;
  }
}

.node-row:last-child {
  border-bottom: 0;
}
.node-row:hover {
  background: rgba(148, 163, 184, 0.04);
}

.node-id {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  min-width: 0;
}

.node-flag {
  flex: none;
  width: 30px;
  height: 22px;
  display: grid;
  place-items: center;
  border-radius: 5px;
  background: rgba(148, 163, 184, 0.12);
  border: 1px solid var(--border-subtle);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  font-weight: 700;
  color: var(--text-secondary);
  letter-spacing: 0.02em;
}

.node-name {
  font-size: 0.9rem;
  font-weight: 550;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.node-region {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.node-lat {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-secondary);
  white-space: nowrap;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.22rem 0.6rem;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  white-space: nowrap;
}
.badge-up {
  background: rgba(52, 211, 153, 0.12);
  color: var(--ok);
  border: 1px solid rgba(52, 211, 153, 0.25);
}
.badge-down {
  background: rgba(248, 113, 113, 0.12);
  color: var(--err);
  border: 1px solid rgba(248, 113, 113, 0.25);
}
.badge-wait {
  background: rgba(148, 163, 184, 0.1);
  color: var(--text-muted);
  border: 1px solid var(--border-subtle);
}

/* ---- code block ---- */

.code {
  position: relative;
  margin: 0;
  padding: 1rem 1.1rem;
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-md);
  background: var(--bg-inset);
  overflow-x: auto;
  max-width: 100%;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  line-height: 1.7;
  color: var(--text-secondary);
}
.code code {
  font-family: inherit;
  white-space: pre;
}
.code .c-key { color: #7dd3fc; }
.code .c-str { color: #86efac; }
.code .c-cmd { color: var(--accent); }
.code .c-dim { color: var(--text-muted); }

.copy-btn {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.3rem 0.55rem;
  border: 1px solid var(--border-subtle);
  border-radius: 6px;
  background: rgba(11, 17, 32, 0.9);
  color: var(--text-muted);
  font-size: 0.7rem;
  cursor: pointer;
  opacity: 0;
  transition: opacity var(--fast) var(--ease), color var(--fast) var(--ease),
    border-color var(--fast) var(--ease);
}
.code:hover .copy-btn,
.copy-btn:focus-visible {
  opacity: 1;
}
.copy-btn:hover {
  color: var(--accent);
  border-color: rgba(56, 189, 248, 0.4);
}
.copy-btn svg {
  width: 12px;
  height: 12px;
}

/* ---- usage steps ---- */

.steps {
  display: grid;
  gap: 1.5rem;
  counter-reset: step;
  grid-template-columns: 1fr;
}

.steps > * {
  min-width: 0;
}

@media (min-width: 900px) {
  .steps {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
  }
}

.step {
  position: relative;
  padding-top: 0.25rem;
  /* grid children default to min-width:auto, so a wide <pre> blows the
     column past the viewport. Force them to shrink and let .code scroll. */
  min-width: 0;
}

.step-num {
  display: inline-grid;
  place-items: center;
  width: 30px;
  height: 30px;
  margin-bottom: 0.9rem;
  border-radius: 50%;
  border: 1px solid rgba(56, 189, 248, 0.3);
  background: var(--accent-dim);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent);
}

.step h3 {
  margin: 0 0 0.4rem;
  font-size: 0.98rem;
  font-weight: 650;
}

.step p {
  margin: 0 0 0.85rem;
  font-size: 0.88rem;
  color: var(--text-secondary);
}

/* ---- faq ---- */

.faq {
  max-width: 820px;
  margin: 0 auto;
  border-top: 1px solid var(--border-subtle);
}

.faq details {
  border-bottom: 1px solid var(--border-subtle);
}

.faq summary {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.15rem 0;
  font-size: 0.98rem;
  font-weight: 550;
  color: var(--text-primary);
  cursor: pointer;
  list-style: none;
  transition: color var(--fast) var(--ease);
}
.faq summary::-webkit-details-marker {
  display: none;
}
.faq summary:hover {
  color: var(--accent);
}
.faq summary::after {
  content: "";
  flex: none;
  margin-left: auto;
  width: 9px;
  height: 9px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(45deg) translateY(-2px);
  transition: transform var(--base) var(--ease);
  opacity: 0.6;
}
.faq details[open] summary::after {
  transform: rotate(225deg) translateY(-2px);
}

.faq-body {
  padding: 0 0 1.35rem;
  max-width: 72ch;
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--text-secondary);
}
.faq-body p {
  margin: 0 0 0.7rem;
}
.faq-body p:last-child {
  margin-bottom: 0;
}
.faq-body code {
  font-family: var(--font-mono);
  font-size: 0.84em;
  padding: 0.1em 0.35em;
  border-radius: 4px;
  background: rgba(148, 163, 184, 0.14);
  color: #7dd3fc;
}

/* ==========================================================================
   Footer
   ========================================================================== */

.footer {
  position: relative;
  z-index: var(--z-base);
  margin-top: 2rem;
  padding: 3rem 0 2rem;
  border-top: 1px solid var(--border-subtle);
  background: rgba(5, 8, 16, 0.6);
}

.footer-grid {
  display: grid;
  gap: 2rem;
  margin-bottom: 2.5rem;
}

@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr;
  }
}

.footer-brand p {
  margin: 0.9rem 0 0;
  max-width: 42ch;
  font-size: 0.86rem;
  line-height: 1.7;
  color: var(--text-muted);
}

.footer-col h4 {
  margin: 0 0 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.footer-col ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.5rem;
}
.footer-col a {
  font-size: 0.87rem;
  color: var(--text-secondary);
}
.footer-col a:hover {
  color: var(--accent);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  align-items: center;
  justify-content: space-between;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-subtle);
  font-size: 0.8rem;
  color: var(--text-muted);
}
.footer-bottom code {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-secondary);
}

/* ==========================================================================
   Toast
   ========================================================================== */

.toast {
  position: fixed;
  left: 50%;
  bottom: 2rem;
  z-index: var(--z-toast);
  transform: translate(-50%, 160%);
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.7rem 1.1rem;
  border: 1px solid var(--border-default);
  border-radius: 999px;
  background: rgba(17, 26, 46, 0.97);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.55);
  font-size: 0.85rem;
  color: var(--text-primary);
  opacity: 0;
  pointer-events: none;
  transition: transform var(--base) var(--ease), opacity var(--base) var(--ease);
}
.toast[data-show="true"] {
  transform: translate(-50%, 0);
  opacity: 1;
}
.toast svg {
  width: 15px;
  height: 15px;
  color: var(--ok);
  flex: none;
}
.toast[data-kind="error"] svg {
  color: var(--err);
}

/* ==========================================================================
   Motion preferences
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .dot {
    animation: none;
  }
}

/* ==========================================================================
   Print
   ========================================================================== */

@media print {
  body::before,
  .nav,
  .toast {
    display: none;
  }
  body {
    background: #fff;
    color: #111;
  }
}