/* ============================================================
   TmpIO.com — design system
   Terminal-inspired light theme: pine green + amber on paper
   ============================================================ */

:root {
  --paper: #f2f5f1;
  --card: #ffffff;
  --ink: #1b2a22;
  --ink-soft: #54655c;
  --line: #dbe4dc;
  --line-strong: #c3d1c6;

  --green: #177a4c;
  --green-hover: #0f6a40;
  --green-deep: #0c5533;
  --green-soft: #e2f1e8;

  --amber: #eda11c;
  --amber-deep: #b47708;
  --amber-soft: #fdf3df;

  --term-bg: #101c15;
  --term-bar: #0b140f;
  --term-text: #c9e2d2;
  --term-dim: #6f8f7d;
  --term-green: #57d98f;
  --term-red: #ff9b8f;

  --red: #d64545;
  --ok: #188a54;

  --font-display: 'Space Grotesk', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
  --font-mono: 'JetBrains Mono', 'Cascadia Code', ui-monospace, Consolas, 'Courier New', monospace;

  --shadow-sm: 0 1px 2px rgba(16, 28, 21, 0.06);
  --shadow-md: 0 8px 20px -10px rgba(16, 28, 21, 0.16);
  --shadow-lift: 0 14px 28px -14px rgba(12, 40, 26, 0.22);
  --ring: 0 0 0 3px rgba(23, 122, 76, 0.16);

  --header-h: 62px;
  --max-w: 1140px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  color: var(--ink);
  line-height: 1.65;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--paper);
  background-image:
    radial-gradient(ellipse 60% 40% at 12% -6%, rgba(23, 122, 76, 0.09), transparent 60%),
    radial-gradient(ellipse 50% 32% at 92% -4%, rgba(237, 161, 28, 0.08), transparent 60%),
    radial-gradient(rgba(27, 42, 34, 0.06) 1px, transparent 1px);
  background-size: auto, auto, 22px 22px;
  background-attachment: fixed;
}

a { color: var(--green-deep); text-decoration: none; }
a:hover { color: var(--green); }

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

/* ---------- header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(6px);
}

.header-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
  height: var(--header-h);
  display: flex;
  align-items: center;
  gap: 28px;
}

.logo {
  font-family: var(--font-mono);
  font-size: 1.28rem;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: -0.02em;
  display: inline-flex;
  align-items: baseline;
  flex-shrink: 0;
}
.logo span { color: var(--green); }
@keyframes blink { 50% { opacity: 0; } }

.site-nav {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-right: auto;
  overflow-x: auto;
  scrollbar-width: none;
}
.site-nav::-webkit-scrollbar { display: none; }

.site-nav a {
  font-size: 0.86rem;
  font-weight: 500;
  color: var(--ink-soft);
  white-space: nowrap;
  padding: 6px 0;
  border-bottom: 2px solid transparent;
  transition: color 0.18s, border-color 0.18s;
}
.site-nav a:hover { color: var(--green-deep); }
.site-nav a.active {
  color: var(--green-deep);
  border-bottom-color: var(--amber);
}

/* ---------- language switcher ---------- */

.lang-switch { position: relative; flex-shrink: 0; }

.lang-btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 12px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--ink);
  background: var(--card);
  border: 1px solid var(--line-strong);
  border-radius: 7px;
  cursor: pointer;
  transition: border-color 0.18s, box-shadow 0.18s, transform 0.12s;
}
.lang-btn:hover { border-color: var(--green); box-shadow: var(--ring); }
.lang-btn:active { transform: scale(0.97); }
.lang-btn svg { width: 15px; height: 15px; stroke: var(--green-deep); fill: none; }
.lang-btn .caret {
  width: 9px; height: 9px;
  stroke: var(--ink-soft);
  transition: transform 0.2s;
}
.lang-switch.open .lang-btn .caret { transform: rotate(180deg); }

.lang-menu {
  position: absolute;
  right: 0;
  top: calc(100% + 8px);
  min-width: 148px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 9px;
  box-shadow: var(--shadow-lift);
  padding: 5px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px);
  transition: opacity 0.18s, transform 0.18s, visibility 0.18s;
  z-index: 120;
}
.lang-switch.open .lang-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.lang-item {
  display: flex;
  align-items: center;
  gap: 9px;
  width: 100%;
  padding: 8px 11px;
  font-size: 0.85rem;
  color: var(--ink);
  background: none;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  text-align: left;
  transition: background 0.15s;
}
.lang-item:hover { background: var(--green-soft); }
.lang-item::before {
  content: '';
  width: 7px; height: 7px;
  border-radius: 50%;
  border: 1.5px solid var(--line-strong);
  transition: all 0.15s;
  flex-shrink: 0;
}
.lang-item.active { color: var(--green-deep); font-weight: 600; }
.lang-item.active::before {
  background: var(--green);
  border-color: var(--green);
}

/* ---------- layout ---------- */

.main-content {
  flex: 1;
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 44px 24px 64px;
}

/* ---------- hero (home) ---------- */

.hero {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 44px;
  align-items: center;
  padding: 26px 0 40px;
}

.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--green-deep);
  background: var(--green-soft);
  border: 1px solid rgba(23, 122, 76, 0.22);
  padding: 6px 13px;
  border-radius: 999px;
  margin-bottom: 20px;
}
.pulse-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--green);
  animation: pulse 1.8s ease-out infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(23, 122, 76, 0.45); }
  70% { box-shadow: 0 0 0 8px rgba(23, 122, 76, 0); }
  100% { box-shadow: 0 0 0 0 rgba(23, 122, 76, 0); }
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4.6vw, 3.1rem);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}
.hero h1 em {
  font-style: normal;
  color: var(--green);
  border-bottom: 4px solid var(--amber);
}

.hero-sub {
  font-size: 1.02rem;
  color: var(--ink-soft);
  max-width: 46ch;
}

/* terminal window */

.terminal {
  background: var(--term-bg);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 28px 56px -28px rgba(10, 28, 18, 0.5), 0 2px 6px rgba(10, 28, 18, 0.18);
  transform: rotate(-0.6deg);
  transition: transform 0.35s ease;
}
.terminal:hover { transform: rotate(0deg) translateY(-3px); }

.terminal-bar {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 11px 15px;
  background: var(--term-bar);
}
.terminal-bar .dot { width: 11px; height: 11px; border-radius: 50%; }
.dot.r { background: #e5604f; }
.dot.y { background: #e8b04c; }
.dot.g { background: #5cb872; }
.terminal-title {
  margin-left: 8px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--term-dim);
  letter-spacing: 0.05em;
}

.terminal-body {
  padding: 20px 20px 24px;
  font-family: var(--font-mono);
  font-size: 0.84rem;
  line-height: 2;
  color: var(--term-text);
  min-height: 132px;
}
.t-prompt { color: var(--term-green); font-weight: 600; }
.t-out { color: var(--term-dim); }
.t-out #typedText { color: var(--term-text); }
.t-caret {
  display: inline-block;
  width: 8px;
  height: 1.05em;
  margin-left: 2px;
  background: var(--amber);
  vertical-align: text-bottom;
  animation: blink 1s steps(1) infinite;
}

/* stats strip */

.stats {
  display: flex;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  margin-bottom: 52px;
}
.stat {
  flex: 1;
  padding: 18px 22px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.stat + .stat { border-left: 1px solid var(--line); }
.stat b {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--green-deep);
  letter-spacing: -0.02em;
}
.stat span {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

/* ---------- section title ---------- */

.section-title {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 22px;
}
.section-title h2 {
  font-family: var(--font-display);
  font-size: 1.45rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}
.section-title .count {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--amber-deep);
}

/* ---------- tool cards ---------- */

.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 18px;
  margin-bottom: 56px;
}

.tool-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 22px 22px 20px;
  color: var(--ink);
  box-shadow: var(--shadow-sm);
  transition: transform 0.22s ease, box-shadow 0.22s ease, border-color 0.22s ease;
  overflow: hidden;
}
.tool-card:hover {
  color: var(--ink);
  transform: translateY(-4px);
  border-color: var(--green);
  box-shadow: var(--shadow-lift);
}

.card-index {
  position: absolute;
  top: 16px;
  right: 18px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--amber-deep);
  letter-spacing: 0.08em;
}

.card-icon {
  width: 42px;
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 9px;
  background: var(--green-soft);
  border: 1px solid rgba(23, 122, 76, 0.18);
  color: var(--green-deep);
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 700;
  transition: transform 0.22s ease, background 0.22s ease, color 0.22s ease;
}
.tool-card:hover .card-icon {
  transform: rotate(-6deg) scale(1.06);
  background: var(--green);
  color: #fff;
}

.tool-card h3 {
  font-family: var(--font-display);
  font-size: 1.04rem;
  font-weight: 700;
  margin-top: 4px;
}
.tool-card p {
  font-size: 0.86rem;
  color: var(--ink-soft);
  line-height: 1.55;
}

.card-go {
  position: absolute;
  right: 18px;
  bottom: 14px;
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--green);
  opacity: 0;
  transform: translateX(-6px);
  transition: opacity 0.22s ease, transform 0.22s ease;
}
.tool-card:hover .card-go { opacity: 1; transform: translateX(0); }

/* ---------- why panel ---------- */

.why-panel {
  border-left: 4px solid var(--amber);
  padding: 26px 28px;
}
.why-panel h2 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 10px;
}
.why-panel p {
  font-size: 0.92rem;
  color: var(--ink-soft);
  line-height: 1.85;
  max-width: 78ch;
}

/* ---------- panels / forms ---------- */

.panel {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 22px;
  margin-bottom: 18px;
  box-shadow: var(--shadow-sm);
}

.panel-title {
  display: flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: 14px;
}
.panel-title::before {
  content: '';
  width: 8px;
  height: 8px;
  background: var(--green);
  border-radius: 2px;
  flex-shrink: 0;
}

textarea,
input[type="text"],
input[type="number"],
select {
  width: 100%;
  padding: 12px 14px;
  font-family: var(--font-mono);
  font-size: 0.86rem;
  color: var(--ink);
  background: #fbfdfb;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  transition: border-color 0.18s, box-shadow 0.18s;
  resize: vertical;
}
textarea:focus,
input[type="text"]:focus,
input[type="number"]:focus,
select:focus {
  outline: none;
  border-color: var(--green);
  box-shadow: var(--ring);
}
textarea { min-height: 190px; line-height: 1.6; }
select { width: auto; cursor: pointer; }

::placeholder { opacity: 0.5; }

/* buttons */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 9px 18px;
  font-family: var(--font-body);
  font-size: 0.86rem;
  font-weight: 600;
  border-radius: 7px;
  border: 1px solid transparent;
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
  transition: background 0.16s, border-color 0.16s, color 0.16s, transform 0.1s, box-shadow 0.16s;
}
.btn:active { transform: translateY(1px); }
.btn:focus-visible { outline: none; box-shadow: var(--ring); }

.btn-primary { background: var(--green); color: #fff; }
.btn-primary:hover { background: var(--green-hover); box-shadow: var(--shadow-md); }

.btn-secondary {
  background: var(--card);
  color: var(--ink);
  border-color: var(--line-strong);
}
.btn-secondary:hover { border-color: var(--green); color: var(--green-deep); }

.btn-group { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 15px; }

/* result area — mini terminal */

.result-area {
  background: var(--term-bg);
  color: var(--term-text);
  border: 1px solid #203529;
  border-radius: 8px;
  padding: 16px 18px;
  font-family: var(--font-mono);
  font-size: 0.83rem;
  line-height: 1.75;
  white-space: pre-wrap;
  word-break: break-all;
  min-height: 96px;
  max-height: 420px;
  overflow-y: auto;
}
.result-area .dim { color: var(--term-dim); }

/* ---------- regex tester ---------- */

.re-wrap { display: flex; align-items: center; gap: 7px; }
.re-slash {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--amber-deep);
  flex-shrink: 0;
}
.re-wrap input[type="text"] { flex: 1; }

.re-flags { display: flex; gap: 5px; flex-shrink: 0; }
.flag-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 32px;
  height: 36px;
  padding: 0 9px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--ink-soft);
  background: #fbfdfb;
  border: 1px solid var(--line-strong);
  border-radius: 7px;
  cursor: pointer;
  user-select: none;
  transition: background 0.15s, color 0.15s, border-color 0.15s, transform 0.1s;
}
.flag-chip input { display: none; }
.flag-chip:hover { border-color: var(--green); color: var(--green-deep); }
.flag-chip:active { transform: scale(0.94); }
.flag-chip.on { background: var(--green); border-color: var(--green); color: #fff; }

.field-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin: 16px 0 8px;
}

mark.hl {
  background: rgba(237, 161, 28, 0.32);
  color: var(--term-text);
  border-bottom: 2px solid var(--amber);
  border-radius: 2px;
  padding: 0 1px;
}
mark.hl.zero {
  background: none;
  border-bottom: none;
  border-left: 2px solid var(--term-green);
  padding: 0;
}

.match-count {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--green-deep);
  margin-bottom: 10px;
  min-height: 1.2em;
}
.match-count.none { color: var(--ink-soft); }
.match-count.err { color: var(--red); }

.match-list { display: flex; flex-direction: column; gap: 8px; margin-top: 14px; }
.match-item {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
  align-items: baseline;
  background: #fbfdfb;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  transition: border-color 0.15s, transform 0.15s;
}
.match-item:hover { border-color: var(--green); transform: translateX(3px); }
.match-idx { color: var(--amber-deep); font-weight: 700; flex-shrink: 0; min-width: 58px; }
.match-val { color: var(--green-deep); font-weight: 600; word-break: break-all; }
.match-groups { color: var(--ink-soft); word-break: break-all; }
.match-groups b { color: var(--ink); font-weight: 700; }

/* ---------- jwt decoder ---------- */

.jwt-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
@media (max-width: 720px) { .jwt-grid { grid-template-columns: 1fr; } }

.jwt-sec-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--amber-deep);
  margin: 14px 0 8px;
}
.jwt-sec-title:first-child { margin-top: 0; }

.jwt-json {
  background: var(--term-bg);
  color: var(--term-text);
  border: 1px solid #203529;
  border-radius: 8px;
  padding: 14px 16px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  line-height: 1.7;
  white-space: pre-wrap;
  word-break: break-all;
  max-height: 320px;
  overflow-y: auto;
}
.jwt-json .k { color: var(--term-green); }
.jwt-json .s { color: #ecc98b; }
.jwt-json .n { color: #8fd0ff; }
.jwt-json .dim { color: var(--term-dim); }

.claim-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 14px;
  padding: 9px 2px;
  border-bottom: 1px dashed var(--line);
  font-size: 0.85rem;
}
.claim-row:last-child { border-bottom: none; }
.claim-key {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
  min-width: 128px;
}
.claim-val { font-family: var(--font-mono); font-size: 0.8rem; color: var(--ink); word-break: break-all; }

.badge {
  font-family: var(--font-mono);
  font-size: 0.64rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  padding: 3px 9px;
  border-radius: 999px;
}
.badge.ok { background: var(--green-soft); color: var(--green-deep); border: 1px solid rgba(23, 122, 76, 0.3); }
.badge.bad { background: #fdeaea; color: var(--red); border: 1px solid rgba(214, 69, 69, 0.3); }

/* ---------- uuid generator ---------- */

.opt-row { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 14px; margin-top: 14px; }
.opt-count {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--ink-soft);
}
.opt-count input[type="number"] { width: 88px; padding: 8px 10px; }

.opt-check {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 12px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-soft);
  background: #fbfdfb;
  border: 1px solid var(--line-strong);
  border-radius: 7px;
  cursor: pointer;
  user-select: none;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}
.opt-check input { accent-color: var(--green); width: 14px; height: 14px; cursor: pointer; }
.opt-check:hover { border-color: var(--green); color: var(--green-deep); }
.opt-check.on { background: var(--green-soft); border-color: var(--green); color: var(--green-deep); font-weight: 600; }

.uuid-list { display: flex; flex-direction: column; gap: 8px; }
.uuid-item {
  display: flex;
  align-items: center;
  gap: 12px;
  background: #fbfdfb;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 9px 12px;
  transition: border-color 0.15s, transform 0.15s;
}
.uuid-item:hover { border-color: var(--green); transform: translateX(3px); }
.uuid-item code {
  flex: 1;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--green-deep);
  word-break: break-all;
}
.uuid-copy {
  flex-shrink: 0;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--ink-soft);
  background: none;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  padding: 5px 10px;
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}
.uuid-copy:hover { color: var(--green-deep); border-color: var(--green); background: var(--green-soft); }

/* ---------- tool page layout ---------- */

.crumbs {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-soft);
  margin-bottom: 22px;
}
.crumbs a { color: var(--ink-soft); border-bottom: 1px dashed var(--line-strong); }
.crumbs a:hover { color: var(--green-deep); border-color: var(--green); }
.crumbs .sep { margin: 0 7px; color: var(--line-strong); }

.tool-layout {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 22px;
  align-items: start;
}

.tool-header { margin-bottom: 22px; }
.tool-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--amber-deep);
  margin-bottom: 10px;
}
.tool-header h1 {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.015em;
  margin-bottom: 8px;
}
.tool-header p {
  font-size: 0.94rem;
  color: var(--ink-soft);
  max-width: 62ch;
}

.about-panel h2 {
  font-family: var(--font-display);
  font-size: 1.08rem;
  font-weight: 700;
  margin-bottom: 10px;
}
.about-panel p {
  font-size: 0.88rem;
  color: var(--ink-soft);
  line-height: 1.85;
}

.tool-sidebar { position: sticky; top: calc(var(--header-h) + 22px); }

.related-list { list-style: none; display: flex; flex-direction: column; gap: 4px; }
.related-list a {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 8px 10px;
  font-size: 0.85rem;
  color: var(--ink);
  border-radius: 7px;
  transition: background 0.15s, color 0.15s, transform 0.15s;
}
.related-list a::before {
  content: '»';
  font-family: var(--font-mono);
  color: var(--amber-deep);
  transition: transform 0.15s;
}
.related-list a:hover {
  background: var(--green-soft);
  color: var(--green-deep);
  transform: translateX(3px);
}
.related-list a:hover::before { transform: translateX(2px); }

/* ---------- info pages (about / privacy / contact) ---------- */

.doc {
  max-width: 780px;
  padding: 34px 38px;
}
.doc h1 {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  font-weight: 700;
  letter-spacing: -0.015em;
  margin-bottom: 8px;
}
.doc .updated {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--ink-soft);
  margin-bottom: 22px;
}
.doc h2 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  margin: 26px 0 10px;
  padding-left: 13px;
  border-left: 3px solid var(--amber);
}
.doc p {
  font-size: 0.92rem;
  color: var(--ink-soft);
  line-height: 1.9;
  margin-bottom: 14px;
}
.doc .lead { font-size: 1rem; color: var(--ink); }

.kv {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 10px 18px;
  margin: 20px 0;
  font-size: 0.9rem;
}
.kv dt {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-soft);
  padding-top: 3px;
}
.kv dd { color: var(--ink); }
.kv dd code {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  background: var(--green-soft);
  padding: 2px 8px;
  border-radius: 5px;
  color: var(--green-deep);
}

/* ---------- base64 converter ---------- */

.mode-switch {
  display: inline-flex;
  margin-bottom: 16px;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  overflow: hidden;
  background: #fbfdfb;
}
.mode-btn {
  appearance: none;
  border: none;
  background: transparent;
  padding: 8px 26px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}
.mode-btn + .mode-btn { border-left: 1px solid var(--line-strong); }
.mode-btn:not(.on):hover { background: var(--green-soft); color: var(--green-deep); }
.mode-btn.on { background: var(--green); color: #fff; }

.b64-workspace { display: block; }
.b64-workspace .img-side { display: none; }
.b64-workspace.mode-image {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  align-items: stretch;
}
.b64-workspace.mode-image > * { min-width: 0; }
.b64-workspace.mode-image .img-side { display: block; }
.b64-workspace #b64Box { word-break: break-all; }
.b64-workspace.mode-image #b64Box {
  min-height: 284px;
  font-size: 0.72rem;
}
.sub-title { margin-top: 22px; }

.img-drop {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 96px;
  padding: 18px;
  border: 1.5px dashed var(--line-strong);
  border-radius: 8px;
  cursor: pointer;
  text-align: center;
  transition: border-color 0.15s, background 0.15s;
}
.img-drop:hover,
.img-drop.dragover {
  border-color: var(--amber);
  background: var(--amber-soft);
}
.img-drop-text {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--ink-soft);
}
.img-hint {
  margin-top: 10px;
  font-size: 0.78rem;
  line-height: 1.7;
  color: var(--ink-soft);
}
.img-meta {
  margin-top: 6px;
  min-height: 1.4em;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  line-height: 1.4;
  color: var(--green);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.img-preview {
  display: none;
  position: relative;
  margin-top: 14px;
  height: 190px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: repeating-conic-gradient(#e9ede8 0% 25%, #ffffff 0% 50%) 0 0 / 16px 16px;
  overflow: hidden;
}
.b64-workspace.mode-image .img-preview { display: block; }
.img-preview img {
  position: absolute;
  top: 10px;
  left: 10px;
  width: calc(100% - 20px);
  height: calc(100% - 20px);
  object-fit: contain;
}
@media (max-width: 720px) {
  .b64-workspace.mode-image { grid-template-columns: 1fr; }
}

/* ---------- json content modules ---------- */

.json-prose h2 {
  font-family: var(--font-display);
  font-size: 1.08rem;
  font-weight: 700;
  margin-bottom: 12px;
}
.json-prose p {
  font-size: 0.88rem;
  color: var(--ink-soft);
  line-height: 1.9;
  margin-bottom: 12px;
}
.json-prose p:last-child { margin-bottom: 0; }
.json-prose .lead {
  font-size: 0.95rem;
  color: var(--ink);
}

.feat-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}
.feat-card {
  background: var(--green-soft);
  border: 1px solid #cfe6d8;
  border-radius: 10px;
  padding: 16px 18px;
}
.feat-glyph {
  display: inline-block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--green-deep);
  background: #ffffff;
  border: 1px solid #cfe6d8;
  border-radius: 7px;
  padding: 4px 9px;
  margin-bottom: 10px;
}
.feat-card h3 {
  font-family: var(--font-display);
  font-size: 0.92rem;
  font-weight: 700;
  margin-bottom: 5px;
}
.feat-card p {
  font-size: 0.8rem;
  color: var(--ink-soft);
  line-height: 1.7;
}

.steps {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.step {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}
.step-num {
  flex-shrink: 0;
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--amber-deep);
  background: var(--amber-soft);
  border: 1px solid #f0dcae;
  border-radius: 50%;
}
.step h3 {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 4px;
  padding-top: 2px;
}
.step p {
  font-size: 0.82rem;
  color: var(--ink-soft);
  line-height: 1.75;
}

.use-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 4px 26px;
}
.use-item {
  border-left: 3px solid var(--line-strong);
  padding: 6px 0 6px 14px;
  transition: border-color 0.15s;
}
.use-item:hover { border-color: var(--green); }
.use-item h3 {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--green-deep);
  margin-bottom: 3px;
}
.use-item p {
  font-size: 0.8rem;
  color: var(--ink-soft);
  line-height: 1.7;
}

.json-ref {
  background: var(--term-bg);
  border-color: #1d2f25;
}
.json-ref h2 {
  font-family: var(--font-display);
  font-size: 1.08rem;
  font-weight: 700;
  color: #e6f2ea;
  margin-bottom: 14px;
}
.ref-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.ref-block {
  background: var(--term-bar);
  border: 1px solid #24392d;
  border-radius: 10px;
  padding: 14px 16px;
}
.ref-label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 3px 9px;
  border-radius: 5px;
  margin-bottom: 10px;
}
.ref-label.ok {
  color: var(--term-green);
  background: rgba(87, 217, 143, 0.12);
}
.ref-label.bad {
  color: var(--term-red);
  background: rgba(255, 155, 143, 0.12);
}
.ref-block pre {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  line-height: 1.75;
  color: var(--term-text);
  white-space: pre;
  overflow-x: auto;
}
.ref-note {
  margin-top: 12px;
  font-size: 0.78rem;
  line-height: 1.7;
  color: var(--term-dim);
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.faq-item {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcfa;
  overflow: hidden;
}
.faq-item summary {
  cursor: pointer;
  list-style: none;
  padding: 12px 16px;
  font-family: var(--font-display);
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--ink);
  display: flex;
  align-items: center;
  gap: 10px;
  transition: background 0.15s;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::before {
  content: '+';
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--amber-deep);
  transition: transform 0.2s;
}
.faq-item[open] summary::before { transform: rotate(45deg); }
.faq-item summary:hover { background: var(--green-soft); }
.faq-item p {
  padding: 0 16px 14px 42px;
  font-size: 0.82rem;
  color: var(--ink-soft);
  line-height: 1.8;
}

@media (max-width: 720px) {
  .feat-grid, .use-grid, .ref-grid { grid-template-columns: 1fr; }
}

/* ---------- shared content modules (all tools) ---------- */

.tool-ref {
  background: var(--term-bg);
  border-color: #1d2f25;
}
.tool-ref h2 {
  font-family: var(--font-display);
  font-size: 1.08rem;
  font-weight: 700;
  color: #e6f2ea;
  margin-bottom: 14px;
}
.ref-label.in {
  color: var(--amber);
  background: rgba(237, 161, 28, 0.14);
}

/* ---------- footer ---------- */

.site-footer {
  background: var(--term-bg);
  color: #8fae9c;
  margin-top: auto;
}
.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 38px 24px 30px;
  display: flex;
  flex-direction: column;
  gap: 22px;
}
.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 24px;
  flex-wrap: wrap;
}
.footer-logo {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 700;
  color: #e6f2ea;
}
.footer-logo span { color: var(--term-green); }
.footer-tagline {
  font-size: 0.84rem;
  margin-top: 7px;
  color: var(--term-dim);
  max-width: 38ch;
}
.footer-links { display: flex; gap: 22px; flex-wrap: wrap; padding-top: 6px; }
.footer-links a {
  font-size: 0.85rem;
  color: #a9c4b4;
  border-bottom: 1px solid transparent;
  transition: color 0.16s, border-color 0.16s;
}
.footer-links a:hover { color: var(--amber); border-color: var(--amber); }
.footer-copy {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--term-dim);
  border-top: 1px solid #1d2f25;
  padding-top: 18px;
}

/* ---------- toast ---------- */

.copy-toast {
  position: fixed;
  bottom: 26px;
  right: 26px;
  background: var(--term-bg);
  color: var(--term-text);
  border: 1px solid #24392d;
  border-left: 3px solid var(--term-green);
  padding: 12px 20px;
  border-radius: 8px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  box-shadow: var(--shadow-lift);
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.25s, transform 0.25s;
  z-index: 1000;
  pointer-events: none;
}
.copy-toast.show { opacity: 1; transform: translateY(0); }

/* ---------- scroll reveal ---------- */

.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}
.reveal.in { opacity: 1; transform: translateY(0); }

/* ---------- responsive ---------- */

@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; gap: 30px; }
  .terminal { transform: none; max-width: 520px; }
  .tool-layout { grid-template-columns: 1fr; }
  .tool-sidebar { position: static; }
}

@media (max-width: 720px) {
  .site-nav { display: none; }
  .header-inner { justify-content: space-between; }
  .main-content { padding: 30px 16px 48px; }
  .stats { flex-direction: column; }
  .stat + .stat { border-left: none; border-top: 1px solid var(--line); }
  .doc { padding: 26px 20px; }
  .kv { grid-template-columns: 1fr; gap: 2px; }
  .kv dt { margin-top: 10px; }
}

/* ---------- 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 { opacity: 1; transform: none; }
  html { scroll-behavior: auto; }
}