/* ============================================================
   ToolBurst — Design System
   Hand-written CSS. No frameworks. No external requests.
   ============================================================ */

:root {
  --accent: #a855f7;
  --accent-light: #c084fc;
  --accent-dark: #7e22ce;
  --accent-rgb: 168, 85, 247;

  --radius: 16px;
  --radius-sm: 10px;
  --radius-lg: 24px;
  --maxw: 1140px;
  --nav-h: 64px;

  --bg: #f6f7fb;
  --bg-soft: #ffffff;
  --bg-elev: #ffffff;
  --text: #18181b;
  --text-soft: #52525b;
  --text-mute: #71717a;
  --border: #e4e4e7;
  --border-soft: #efeff3;
  --glass: rgba(255, 255, 255, 0.72);
  --glass-border: rgba(255, 255, 255, 0.6);
  --code-bg: #f4f4f5;
  --input-bg: #f9fafb;

  /* ---- Unified spacing scale (px) ---- */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-7: 32px;
  --space-8: 40px;

  /* ---- Motion tokens ---- */
  --t-fast: .15s;
  --t-base: .2s;
  --t-slow: .3s;
  --ease-out: cubic-bezier(.22, 1, .36, 1);
  --ease-spring: cubic-bezier(.34, 1.56, .64, 1);

  /* ---- Layered shadow system (bold depth) ---- */
  --ring: 0 0 0 1px rgba(0, 0, 0, .03);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, .06), 0 1px 3px rgba(0, 0, 0, .04);
  --shadow: 0 4px 8px -4px rgba(0, 0, 0, .06), 0 12px 28px -10px rgba(0, 0, 0, .12);
  --shadow-md: 0 6px 14px -6px rgba(0, 0, 0, .08), 0 20px 40px -16px rgba(0, 0, 0, .16);
  --shadow-lg: 0 10px 24px -10px rgba(0, 0, 0, .10), 0 32px 64px -24px rgba(0, 0, 0, .22);
  --shadow-glow: 0 0 44px rgba(var(--accent-rgb), .22);

  /* ---- Status colors (tokenized for re-skin) ---- */
  --ok: #16a34a;
  --warn: #d97706;
  --err: #dc2626;
}

html.dark {
  --bg: #07060a;
  --bg-soft: #0c0b12;
  --bg-elev: #0f0e15;
  --text: #ededf2;
  --text-soft: #c2c2cc;
  --text-mute: #8b8b97;
  --border: rgba(255, 255, 255, 0.08);
  --border-soft: rgba(255, 255, 255, 0.05);
  --glass: rgba(16, 14, 24, 0.62);
  --glass-border: rgba(255, 255, 255, 0.08);
  --code-bg: rgba(255, 255, 255, 0.04);
  --input-bg: rgba(255, 255, 255, 0.04);

  /* Heavier, deeper shadows for dark surfaces */
  --ring: 0 0 0 1px rgba(0, 0, 0, .4);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, .4), 0 1px 3px rgba(0, 0, 0, .35);
  --shadow: 0 4px 10px -4px rgba(0, 0, 0, .5), 0 12px 30px -10px rgba(0, 0, 0, .6);
  --shadow-md: 0 6px 16px -6px rgba(0, 0, 0, .55), 0 22px 44px -16px rgba(0, 0, 0, .7);
  --shadow-lg: 0 12px 28px -10px rgba(0, 0, 0, .6), 0 36px 72px -24px rgba(0, 0, 0, .8);
  --shadow-glow: 0 0 48px rgba(var(--accent-rgb), .3);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
/* System fonts only — zero external requests, native on every OS */
  font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, 'Apple Color Emoji', 'Segoe UI Emoji', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  transition: background-color .3s ease, color .3s ease;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
h1, h2, h3, h4 { line-height: 1.15; margin: 0 0 .5em; letter-spacing: -0.025em; }
h1 { font-size: clamp(2rem, 5vw, 3.5rem); font-weight: 800; letter-spacing: -0.035em; }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.4rem); font-weight: 800; letter-spacing: -0.03em; }
h3 { font-size: 1.25rem; font-weight: 700; letter-spacing: -0.02em; }
p { margin: 0 0 1em; color: var(--text-soft); }
ul { margin: 0 0 1em; padding-left: 1.2em; }
li { margin-bottom: .4em; color: var(--text-soft); }
code { font-family: ui-monospace, 'SF Mono', Menlo, Consolas, monospace; background: var(--code-bg); padding: 2px 6px; border-radius: 6px; font-size: .88em; }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.section { padding: 88px 0; }
.text-accent { color: var(--accent); }
.mono { font-family: ui-monospace, 'SF Mono', Menlo, Consolas, monospace; }
.center { text-align: center; }
.gradient-text {
  background: linear-gradient(120deg, var(--accent-light), var(--accent), var(--accent-dark));
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}
.hidden { display: none !important; }
.nowrap { white-space: nowrap; }

/* ---- Decorative glow ---- */
.glow {
  position: fixed; width: 720px; height: 720px; border-radius: 50%;
  background: radial-gradient(circle, rgba(var(--accent-rgb), 0.16) 0%, transparent 65%);
  pointer-events: none; z-index: 0; filter: blur(20px);
}

/* ---- Navigation ---- */
.nav {
  position: sticky; top: 0; z-index: 40; height: var(--nav-h);
  backdrop-filter: blur(20px) saturate(180%); -webkit-backdrop-filter: blur(20px) saturate(180%);
  background: var(--glass); border-bottom: 1px solid var(--border);
  box-shadow: 0 1px 0 rgba(255, 255, 255, .4) inset, 0 4px 16px -8px rgba(0, 0, 0, .08);
}
html.dark .nav { box-shadow: 0 1px 0 rgba(255, 255, 255, .04) inset, 0 4px 16px -8px rgba(0, 0, 0, .5); }
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 100%; position: relative; }
.nav-brand { font-size: 1.3rem; font-weight: 800; display: flex; align-items: center; gap: 10px; letter-spacing: -0.02em; }
.nav-brand .dot {
  width: 28px; height: 28px; border-radius: 8px;
  background: linear-gradient(135deg, var(--accent-light), var(--accent), var(--accent-dark));
  display: grid; place-items: center;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .4), 0 4px 14px rgba(var(--accent-rgb), .45);
}
.nav-brand .dot svg { width: 16px; height: 16px; color: #fff; }
.nav-links { display: flex; align-items: center; gap: 28px; }
.nav-links a { font-weight: 500; color: var(--text-mute); transition: color var(--t-base); position: relative; }
.nav-links a:hover { color: var(--accent); }
.nav-right { display: flex; align-items: center; gap: 14px; }
.nav-burger { display: none; background: none; border: none; cursor: pointer; color: var(--text); padding: 6px; border-radius: var(--radius-sm); }
.nav-burger:hover { background: rgba(var(--accent-rgb), .08); }
.nav-burger svg { width: 24px; height: 24px; }

/* ---- Theme toggle ---- */
.theme-toggle { width: 56px; height: 28px; border-radius: 999px; position: relative; cursor: pointer; background: var(--border); transition: background .3s; flex-shrink: 0; }
html.dark .theme-toggle { background: rgba(var(--accent-rgb), .35); }
.theme-toggle .knob { position: absolute; top: 3px; left: 3px; width: 22px; height: 22px; border-radius: 50%; background: #fff; box-shadow: 0 1px 4px rgba(0,0,0,.25); display: grid; place-items: center; transition: transform .3s cubic-bezier(.4,0,.2,1); }
html.dark .theme-toggle .knob { transform: translateX(28px); }
.theme-toggle svg { width: 14px; height: 14px; position: absolute; transition: opacity .25s, transform .3s; }
.theme-toggle .sun { color: #f59e0b; }
.theme-toggle .moon { color: var(--accent); opacity: 0; }
html.dark .theme-toggle .sun { opacity: 0; }
html.dark .theme-toggle .moon { opacity: 1; }

/* ---- Buttons ---- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--space-2);
  font-weight: 600; font-size: .95rem; padding: 12px 22px; border-radius: var(--radius-sm);
  border: none; cursor: pointer; transition: transform var(--t-fast) ease, box-shadow var(--t-base), background var(--t-base), border-color var(--t-base);
  font-family: inherit; position: relative; white-space: nowrap;
}
.btn:active { transform: translateY(1px); }
.btn:focus-visible { outline: none; box-shadow: 0 0 0 3px rgba(var(--accent-rgb), .35); }
.btn:disabled, .btn[disabled] { opacity: .55; cursor: not-allowed; transform: none !important; box-shadow: none !important; }
.btn-primary {
  background: linear-gradient(180deg, var(--accent-light) 0%, var(--accent) 50%, var(--accent-dark) 100%);
  color: #fff;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .3), 0 6px 18px -6px rgba(var(--accent-rgb), .55), 0 2px 4px rgba(var(--accent-rgb), .25);
}
.btn-primary:hover {
  background: linear-gradient(180deg, var(--accent-light) 0%, var(--accent) 45%, var(--accent-dark) 100%);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .4), 0 10px 26px -6px rgba(var(--accent-rgb), .6), 0 4px 8px rgba(var(--accent-rgb), .35);
  transform: translateY(-2px);
}
.btn-secondary {
  background: linear-gradient(180deg, rgba(var(--accent-rgb), .12), rgba(var(--accent-rgb), .06));
  color: var(--accent); border: 1px solid rgba(var(--accent-rgb), .25);
}
.btn-secondary:hover { background: rgba(var(--accent-rgb), .16); border-color: var(--accent); transform: translateY(-1px); }
.btn-ghost { background: var(--bg-soft); color: var(--text-soft); border: 1px solid var(--border); box-shadow: var(--shadow-sm); }
.btn-ghost:hover { border-color: rgba(var(--accent-rgb), .5); color: var(--accent); transform: translateY(-1px); box-shadow: var(--shadow); }
.btn-lg { padding: 14px 30px; font-size: 1.02rem; border-radius: 12px; }
.btn-block { width: 100%; }
.btn svg { width: 18px; height: 18px; }

/* ---- Hero ---- */
.hero { position: relative; text-align: center; padding: 96px 0 64px; }
.hero .badge {
  display: inline-flex; align-items: center; gap: var(--space-2); padding: 7px 16px; border-radius: 999px;
  border: 1px solid rgba(var(--accent-rgb), .3); background: linear-gradient(180deg, rgba(var(--accent-rgb), .12), rgba(var(--accent-rgb), .05));
  color: var(--accent); font-size: .8rem; font-weight: 600; margin-bottom: var(--space-6);
  box-shadow: 0 2px 8px -2px rgba(var(--accent-rgb), .2), inset 0 1px 0 rgba(255, 255, 255, .25);
}
.hero .badge .pulse { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 0 rgba(var(--accent-rgb), .6); animation: pulse 2s infinite; }
.hero h1 { margin-bottom: var(--space-5); }
.hero .sub { font-size: clamp(1.1rem, 2vw, 1.4rem); color: var(--accent); font-weight: 600; margin-bottom: var(--space-2); }
.hero p.lead { font-size: 1.1rem; max-width: 640px; margin: 0 auto 28px; }
.hero .cta-row { display: flex; gap: var(--space-3); justify-content: center; flex-wrap: wrap; margin-bottom: 28px; }
.hero .pills { display: flex; gap: var(--space-2); justify-content: center; flex-wrap: wrap; }
.pill {
  display: inline-flex; align-items: center; gap: 6px; padding: 7px 14px; border-radius: 999px;
  background: linear-gradient(180deg, var(--bg-soft), var(--bg-elev)); border: 1px solid var(--border);
  font-size: .82rem; font-weight: 500; color: var(--text-mute); box-shadow: var(--shadow-sm);
}
.pill svg { width: 15px; height: 15px; color: var(--accent); }

@keyframes pulse { 0%,100% { opacity: 1; transform: scale(1); } 50% { opacity: .5; transform: scale(1.4); } }

/* ---- Section heading ---- */
.section-head { margin-bottom: 44px; }
.section-head .eyebrow {
  display: inline-block; color: var(--accent); font-size: .78rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase;
  padding: 5px 12px; border-radius: 999px;
  background: linear-gradient(180deg, rgba(var(--accent-rgb), .12), rgba(var(--accent-rgb), .05));
  border: 1px solid rgba(var(--accent-rgb), .2);
}
.section-head h2 { margin-top: var(--space-3); }
.section-head p { max-width: 600px; }
.section-head.center { text-align: center; }
.section-head.center .eyebrow { display: inline-block; }
.section-head.center p { margin-left: auto; margin-right: auto; }

/* ---- Tool grid + cards ---- */
.tool-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-5); }
.tool-card {
  display: flex; flex-direction: column; padding: var(--space-6); border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(255, 255, 255, .4) 0%, transparent 6%), var(--bg-elev);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: transform var(--t-slow) var(--ease-out), box-shadow var(--t-slow) ease, border-color var(--t-slow) ease;
  position: relative; overflow: hidden;
}
html.dark .tool-card { background: linear-gradient(180deg, rgba(255, 255, 255, .03) 0%, transparent 6%), var(--bg-elev); }
.tool-card:hover { transform: translateY(-4px); border-color: rgba(var(--accent-rgb), .45); box-shadow: var(--shadow-md); }
.tool-card .icon {
  width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center; margin-bottom: 18px;
  background: linear-gradient(180deg, rgba(var(--accent-rgb), .16), rgba(var(--accent-rgb), .08)); color: var(--accent);
  border: 1px solid rgba(var(--accent-rgb), .12);
}
.tool-card .icon svg { width: 22px; height: 22px; }
.tool-card h3 { margin-bottom: var(--space-2); }
.tool-card p { font-size: .9rem; margin-bottom: 0; flex: 1; }
.tool-card .open {
  margin-top: 18px; font-size: .88rem; font-weight: 600; color: var(--accent);
  display: inline-flex; align-items: center; gap: 4px; transition: gap var(--t-base);
}
.tool-card:hover .open { gap: 8px; }
.tool-card .cat {
  position: absolute; top: 16px; right: 16px; font-size: .65rem; font-weight: 700; letter-spacing: .08em;
  text-transform: uppercase; color: var(--text-mute); padding: 3px 8px; border-radius: 6px; background: var(--code-bg);
}

/* ---- Featured cards (bigger, glow) ---- */
.featured-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-5); margin-bottom: var(--space-6); }
.featured-card {
  position: relative; padding: 28px; border-radius: var(--radius-lg); overflow: hidden;
  background: linear-gradient(180deg, rgba(255, 255, 255, .5) 0%, transparent 8%), linear-gradient(160deg, rgba(var(--accent-rgb), .1), var(--bg-elev) 58%);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  transition: transform var(--t-slow) var(--ease-out), box-shadow var(--t-slow) ease, border-color var(--t-slow) ease;
}
html.dark .featured-card { background: linear-gradient(180deg, rgba(255, 255, 255, .04) 0%, transparent 8%), linear-gradient(160deg, rgba(var(--accent-rgb), .1), var(--bg-elev) 58%); }
.featured-card::before {
  content: ''; position: absolute; inset: -1px; border-radius: var(--radius-lg); padding: 1px;
  background: linear-gradient(135deg, rgba(var(--accent-rgb), .7), transparent 55%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude; opacity: 0; transition: opacity var(--t-slow);
}
.featured-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-glow), var(--shadow-lg); }
.featured-card:hover::before { opacity: 1; }
.featured-card .icon {
  width: 50px; height: 50px; border-radius: 14px; display: grid; place-items: center; margin-bottom: 18px;
  background: linear-gradient(135deg, var(--accent-light), var(--accent), var(--accent-dark)); color: #fff;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .4), 0 10px 24px -4px rgba(var(--accent-rgb), .5);
}
.featured-card .icon svg { width: 24px; height: 24px; }
.featured-card h3 { font-size: 1.2rem; }
.featured-card p { font-size: .92rem; }
.featured-card .open { margin-top: var(--space-4); font-weight: 600; color: var(--accent); display: inline-flex; align-items: center; gap: 5px; }

/* ---- Tool page layout ---- */
.tool-page { padding: 48px 0 24px; }
.tool-hero { margin-bottom: 32px; }
.tool-hero .crumbs { font-size: .82rem; color: var(--text-mute); margin-bottom: 16px; }
.tool-hero .crumbs a:hover { color: var(--accent); }
.tool-hero .icon { width: 56px; height: 56px; border-radius: 16px; display: grid; place-items: center; margin-bottom: 18px; background: rgba(var(--accent-rgb), .1); color: var(--accent); }
.tool-hero .icon svg { width: 28px; height: 28px; }
.tool-hero h1 { font-size: clamp(1.8rem, 4vw, 2.6rem); }
.tool-hero p { font-size: 1.05rem; max-width: 680px; }

.tool-shell {
  display: grid; grid-template-columns: 1fr 300px; gap: 32px; align-items: start;
}
.panel {
  background: linear-gradient(180deg, rgba(255, 255, 255, .4) 0%, transparent 4%), var(--bg-elev);
  border: 1px solid var(--border); border-radius: var(--radius);
  padding: 28px; box-shadow: var(--shadow);
}
html.dark .panel { background: linear-gradient(180deg, rgba(255, 255, 255, .025) 0%, transparent 4%), var(--bg-elev); }
.sidebar { display: flex; flex-direction: column; gap: var(--space-5); position: sticky; top: calc(var(--nav-h) + 20px); }
.side-card {
  background: linear-gradient(180deg, rgba(255, 255, 255, .4) 0%, transparent 6%), var(--bg-elev);
  border: 1px solid var(--border); border-radius: var(--radius); padding: var(--space-5);
  box-shadow: var(--shadow-sm);
}
html.dark .side-card { background: linear-gradient(180deg, rgba(255, 255, 255, .025) 0%, transparent 6%), var(--bg-elev); }
.side-card h4 { font-size: .95rem; margin-bottom: var(--space-3); }
.side-card a.related { display: flex; align-items: center; gap: 10px; padding: 10px; border-radius: 10px; transition: background var(--t-base); }
.side-card a.related:hover { background: rgba(var(--accent-rgb), .07); }
.side-card a.related .ic { width: 32px; height: 32px; border-radius: 8px; background: linear-gradient(180deg, rgba(var(--accent-rgb), .14), rgba(var(--accent-rgb), .07)); color: var(--accent); display: grid; place-items: center; flex-shrink: 0; }
.side-card a.related .ic svg { width: 16px; height: 16px; }
.side-card a.related .nm { font-size: .88rem; font-weight: 600; }

.info-section { padding: 56px 0; border-top: 1px solid var(--border); }
.info-section h2 { margin-bottom: 16px; font-size: 1.6rem; }
.info-section h3 { margin: 24px 0 10px; font-size: 1.1rem; color: var(--text); }

/* ---- FAQ ---- */
.faq-item { border-bottom: 1px solid var(--border); padding: 4px 0; }
.faq-item summary { cursor: pointer; padding: 16px 0; font-weight: 600; list-style: none; display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary .chev { transition: transform .2s; color: var(--accent); flex-shrink: 0; }
.faq-item[open] summary .chev { transform: rotate(180deg); }
.faq-item p { padding-bottom: 16px; margin: 0; }

/* ---- Forms ---- */
.field { margin-bottom: 18px; }
.field label { display: block; font-size: .8rem; font-weight: 600; color: var(--text-mute); margin-bottom: 7px; text-transform: uppercase; letter-spacing: .04em; }
.input, select.input, textarea.input {
  width: 100%; padding: 12px 14px; border-radius: var(--radius-sm); border: 1px solid var(--border);
  background: var(--input-bg); color: var(--text); font-family: inherit; font-size: .95rem; font-weight: 500;
  transition: border-color var(--t-base), box-shadow var(--t-base), background var(--t-base); outline: none;
}
.input:focus, select.input:focus, textarea.input:focus {
  border-color: var(--accent); background: var(--bg-elev);
  box-shadow: 0 0 0 4px rgba(var(--accent-rgb), .14), 0 1px 2px rgba(0, 0, 0, .04);
}
textarea.input { resize: vertical; min-height: 120px; }
select.input { cursor: pointer; appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2371717a' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 12px center; padding-right: 38px; }
.input-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.hint { font-size: .8rem; color: var(--text-mute); margin-top: 6px; }
.row-gap { display: flex; flex-direction: column; gap: 14px; }

/* ---- Toggle switch (checkbox styling) ---- */
.switch { position: relative; display: inline-block; width: 44px; height: 24px; }
.switch input { opacity: 0; width: 0; height: 0; }
.switch .track { position: absolute; inset: 0; background: var(--border); border-radius: 999px; transition: background .25s; cursor: pointer; }
.switch .track::after { content: ''; position: absolute; top: 3px; left: 3px; width: 18px; height: 18px; border-radius: 50%; background: #fff; box-shadow: 0 1px 3px rgba(0,0,0,.2); transition: transform .25s; }
.switch input:checked + .track { background: var(--accent); }
.switch input:checked + .track::after { transform: translateX(20px); }
.check-row { display: flex; align-items: center; justify-content: space-between; padding: 12px 14px; background: var(--input-bg); border: 1px solid var(--border); border-radius: var(--radius-sm); cursor: pointer; }
.check-row span { font-size: .9rem; font-weight: 500; }

/* ---- Output / result blocks ---- */
.output { background: var(--code-bg); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 16px; font-family: ui-monospace, Menlo, monospace; font-size: .88rem; white-space: pre-wrap; word-break: break-word; min-height: 56px; }
.result-big { font-size: 2rem; font-weight: 800; color: var(--accent); }
.kvs { display: grid; grid-template-columns: auto 1fr; gap: 8px 16px; }
.kvs .k { color: var(--text-mute); font-weight: 600; font-size: .85rem; }
.kvs .v { font-family: ui-monospace, Menlo, monospace; }

/* ---- Dropzone ---- */
.dropzone { border: 2px dashed var(--border); border-radius: var(--radius); padding: 40px 20px; text-align: center; cursor: pointer; transition: border-color var(--t-base), background var(--t-base), transform var(--t-base); background: var(--input-bg); }
.dropzone:hover, .dropzone.drag { border-color: var(--accent); background: rgba(var(--accent-rgb), .06); transform: translateY(-1px); }
.dropzone svg { width: 48px; height: 48px; color: var(--text-mute); margin: 0 auto 12px; transition: color var(--t-base); }
.dropzone:hover svg, .dropzone.drag svg { color: var(--accent); }
.dropzone p { margin: 0; }

/* ---- Status / badge states ---- */
.status { text-align: center; font-weight: 600; font-size: .9rem; padding: 10px; border-radius: var(--radius-sm); margin-bottom: var(--space-4); border: 1px solid transparent; }
.status-ok { color: var(--ok); background: rgba(22,163,74,.1); border-color: rgba(22,163,74,.18); }
.status-warn { color: var(--warn); background: rgba(217,119,6,.1); border-color: rgba(217,119,6,.18); }
.status-err { color: var(--err); background: rgba(220,38,38,.1); border-color: rgba(220,38,38,.18); }
.status-info { color: var(--accent); background: rgba(var(--accent-rgb), .1); border-color: rgba(var(--accent-rgb), .18); }

/* ---- Privacy / feature grids ---- */
.feature-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-5); }
.feature-card {
  padding: var(--space-6); border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(255, 255, 255, .4) 0%, transparent 6%), var(--bg-elev);
  border: 1px solid var(--border); box-shadow: var(--shadow-sm);
  transition: transform var(--t-slow) var(--ease-out), box-shadow var(--t-slow) ease, border-color var(--t-slow) ease;
}
html.dark .feature-card { background: linear-gradient(180deg, rgba(255, 255, 255, .025) 0%, transparent 6%), var(--bg-elev); }
.feature-card:hover { transform: translateY(-3px); border-color: rgba(var(--accent-rgb), .35); box-shadow: var(--shadow-md); }
.feature-card .icon { width: 40px; height: 40px; border-radius: 10px; display: grid; place-items: center; margin-bottom: 14px; background: linear-gradient(180deg, rgba(var(--accent-rgb), .16), rgba(var(--accent-rgb), .08)); color: var(--accent); border: 1px solid rgba(var(--accent-rgb), .12); }
.feature-card .icon svg { width: 20px; height: 20px; }
.feature-card h3 { font-size: 1.05rem; margin-bottom: 6px; }
.feature-card p { font-size: .9rem; margin: 0; }

/* ---- Socials ---- */
.socials { display: flex; gap: var(--space-3); justify-content: center; flex-wrap: wrap; }
.social {
  width: 40px; height: 40px; border-radius: 10px; display: grid; place-items: center;
  border: 1px solid var(--border); color: var(--text-mute); background: var(--bg-elev);
  box-shadow: var(--shadow-sm); transition: all var(--t-base);
}
.social:hover { border-color: var(--accent); color: var(--accent); transform: scale(1.08); box-shadow: 0 0 18px rgba(var(--accent-rgb), .35), var(--shadow); }

/* ---- Crypto / support cards ---- */
.support-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-4); max-width: 720px; margin: 0 auto; }
.support-card { text-align: left; padding: 16px 20px; border-radius: var(--radius); background: linear-gradient(180deg, rgba(255, 255, 255, .4) 0%, transparent 6%), var(--bg-elev); border: 1px solid var(--border); box-shadow: var(--shadow-sm); }
html.dark .support-card { background: linear-gradient(180deg, rgba(255, 255, 255, .025) 0%, transparent 6%), var(--bg-elev); }
.support-card.full { grid-column: 1 / -1; }
.support-card .lbl { font-size: .78rem; font-weight: 700; color: var(--accent); margin-bottom: 6px; }
.support-card .addr { font-family: ui-monospace, Menlo, monospace; font-size: .8rem; color: var(--text-mute); word-break: break-all; cursor: pointer; transition: color var(--t-base); }
.support-card .addr:hover { color: var(--accent); }

/* ---- Footer ---- */
.footer { border-top: 1px solid var(--border); background: var(--bg-soft); padding: 56px 0 40px; position: relative; }
.footer::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px; background: linear-gradient(90deg, transparent, rgba(var(--accent-rgb), .3), transparent); }
.footer-grid { display: grid; grid-template-columns: 1.4fr 2fr; gap: 40px; margin-bottom: 36px; }
.footer-brand .nav-brand { margin-bottom: var(--space-3); }
.footer-brand p { font-size: .9rem; }
.footer-index h4 { font-size: .85rem; text-transform: uppercase; letter-spacing: .08em; color: var(--text-mute); margin-bottom: var(--space-3); }
.footer-index ul { list-style: none; padding: 0; margin: 0; columns: 2; column-gap: var(--space-6); }
.footer-index li { margin-bottom: 7px; break-inside: avoid; }
.footer-index a { font-size: .88rem; color: var(--text-soft); transition: color var(--t-base); }
.footer-index a:hover { color: var(--accent); }
.footer-bottom { border-top: 1px solid var(--border); padding-top: var(--space-6); display: flex; justify-content: space-between; align-items: center; gap: var(--space-4); flex-wrap: wrap; }
.footer-bottom p { margin: 0; font-size: .85rem; }

/* ---- Toast ---- */
.toast {
  position: fixed; bottom: 28px; left: 50%; transform: translateX(-50%) translateY(140px);
  padding: 14px 22px; border-radius: var(--radius-sm); color: #fff; font-weight: 600;
  box-shadow: var(--shadow-lg); z-index: 100; opacity: 0; transition: transform var(--t-slow) ease, opacity var(--t-slow) ease;
  display: flex; align-items: center; gap: 10px; max-width: 90vw;
}
.toast.show { transform: translateX(-50%) translateY(0); opacity: 1; }
.toast.ok { background: var(--ok); }
.toast.err { background: var(--err); }
.toast.info { background: var(--accent); }
.toast svg { width: 18px; height: 18px; flex-shrink: 0; }

/* ---- Scroll reveal (progressive enhancement: only hide when JS is active) ---- */
html.js .reveal { opacity: 0; transform: translateY(24px); transition: opacity .6s ease, transform .6s ease; }
html.js .reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html.js .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ---- Tooltip ---- */
.tip { position: relative; display: inline-grid; place-items: center; width: 16px; height: 16px; border-radius: 50%; background: var(--code-bg); color: var(--text-mute); font-size: 10px; cursor: help; margin-left: 5px; }
.tip .box { visibility: hidden; position: absolute; bottom: 130%; left: 50%; transform: translateX(-50%); width: 200px; background: var(--text); color: var(--bg); padding: 7px 10px; border-radius: 8px; font-size: .78rem; font-weight: 500; opacity: 0; transition: opacity .25s; z-index: 20; text-align: center; }
.tip:hover .box { visibility: visible; opacity: 1; }

/* ---- Progress bar ---- */
.progress { height: 8px; background: var(--code-bg); border-radius: 999px; overflow: hidden; }
.progress > div { height: 100%; background: var(--accent); border-radius: 999px; transition: width .3s; }

/* ---- Responsive ---- */
@media (max-width: 980px) {
  .tool-shell { grid-template-columns: 1fr; }
  .sidebar { position: static; flex-direction: row; flex-wrap: wrap; }
  .side-card { flex: 1; min-width: 240px; }
  .featured-grid { grid-template-columns: repeat(2, 1fr); }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 760px) {
  .section { padding: 64px 0; }
  .hero { padding: 64px 0 48px; }
  .nav-links { display: none; }
  .nav-burger { display: block; }
  .nav-links.open {
    display: flex; flex-direction: column; position: absolute; top: var(--nav-h); left: 0; right: 0;
    background: var(--bg-elev); border-bottom: 1px solid var(--border); padding: 16px 24px 24px; gap: 16px; box-shadow: var(--shadow-md);
  }
  .tool-grid { grid-template-columns: 1fr; }
  .featured-grid { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-index ul { columns: 2; }
  .support-grid { grid-template-columns: 1fr; }
  .input-row { grid-template-columns: 1fr; }
  /* tap targets + mobile refinements (consolidated) */
  .nav-links a, .nav-burger, .theme-toggle { min-height: 44px; display: inline-flex; align-items: center; }
  .btn { min-height: 48px; }
  .seo-cat-grid { grid-template-columns: 1fr; }
  .geo-grid { grid-template-columns: 1fr; }
  .footer-index ul { columns: 1; }
  .faq-item summary { padding: 18px 0; }
  .panel { padding: 20px; }
  .hero { padding-top: 40px; }
  .preview-grid { grid-template-columns: 1fr; }
  .search input { padding: 14px 18px 14px 46px; }
}
@media (max-width: 480px) {
  .container { padding: 0 18px; }
}

/* ---- Markdown preview styling ---- */
#md-preview h1, #md-preview h2, #md-preview h3 { margin-top: 0.6em; }
#md-preview h1 { font-size: 1.6rem; }
#md-preview h2 { font-size: 1.3rem; }
#md-preview h3 { font-size: 1.1rem; }
#md-preview p { color: var(--text); margin: 0 0 .8em; }
#md-preview ul, #md-preview ol { color: var(--text); }
#md-preview a { color: var(--accent); text-decoration: underline; }
#md-preview code { background: var(--code-bg); padding: 2px 6px; border-radius: 5px; font-size: .88em; }
#md-preview pre { background: var(--code-bg); padding: 14px; border-radius: 10px; overflow: auto; margin: 0 0 1em; }
#md-preview pre code { background: none; padding: 0; }
#md-preview blockquote { border-left: 3px solid var(--accent); margin: 0 0 1em; padding: 4px 14px; color: var(--text-mute); }
#md-preview table { border-collapse: collapse; width: 100%; margin: 0 0 1em; }
#md-preview th, #md-preview td { border: 1px solid var(--border); padding: 8px 12px; text-align: left; }
#md-preview th { background: var(--code-bg); }
#md-preview img { border-radius: 8px; }

/* ---- CSV / data table ---- */
.data-table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius-sm); }
table.data-table { border-collapse: collapse; width: 100%; font-size: .88rem; }
table.data-table th, table.data-table td { border-bottom: 1px solid var(--border); padding: 9px 12px; text-align: left; white-space: nowrap; }
table.data-table th { background: var(--code-bg); font-weight: 700; cursor: pointer; position: sticky; top: 0; user-select: none; }
table.data-table th:hover { color: var(--accent); }
table.data-table tr:hover td { background: rgba(var(--accent-rgb), .04); }

/* ---- Range styling refinement ---- */
input[type="range"] { height: 6px; border-radius: 999px; }

/* ---- SEO category grid (keyword clusters) ---- */
.seo-cat-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-5); }
.seo-cat { padding: var(--space-6); border-radius: var(--radius); background: linear-gradient(180deg, rgba(255, 255, 255, .4) 0%, transparent 6%), var(--bg-elev); border: 1px solid var(--border); box-shadow: var(--shadow-sm); }
html.dark .seo-cat { background: linear-gradient(180deg, rgba(255, 255, 255, .025) 0%, transparent 6%), var(--bg-elev); }
.seo-cat h3 { font-size: 1.1rem; margin-bottom: var(--space-2); }
.seo-cat > p { font-size: .9rem; margin-bottom: var(--space-3); }
.seo-cat ul { list-style: none; padding: 0; margin: 0; }
.seo-cat li { margin-bottom: var(--space-2); }
.seo-cat a { display: inline-block; font-size: .9rem; font-weight: 500; color: var(--text-soft); padding: 6px 0; transition: color var(--t-base); min-height: 32px; }
.seo-cat a:hover { color: var(--accent); }

/* ---- GEO grid ---- */
.geo-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-5); }
.geo-card { padding: var(--space-6); border-radius: var(--radius); background: linear-gradient(180deg, rgba(255, 255, 255, .4) 0%, transparent 6%), var(--bg-elev); border: 1px solid var(--border); box-shadow: var(--shadow-sm); }
html.dark .geo-card { background: linear-gradient(180deg, rgba(255, 255, 255, .025) 0%, transparent 6%), var(--bg-elev); }
.geo-card h3 { font-size: 1.05rem; margin-bottom: 10px; }
.geo-card p { font-size: .9rem; margin: 0; }

/* ---- SEO copy block ---- */
.seo-copy p { font-size: .98rem; line-height: 1.75; color: var(--text-soft); }
.seo-copy strong { color: var(--text); font-weight: 600; }

/* ---- FAQ list ---- */
.faq-list { display: flex; flex-direction: column; gap: 4px; }
.faq-item summary { font-size: 1rem; min-height: 48px; }

/* ---- Custom scrollbar ---- */
* {
  scrollbar-width: thin;
  scrollbar-color: rgba(var(--accent-rgb), .35) transparent;
}
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(var(--accent-rgb), .35); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: rgba(var(--accent-rgb), .6); }
::-webkit-scrollbar-corner { background: transparent; }

/* ============================================================
   Premium Preview Cards — $1M flagship entry points
   Fluid 5→3→2→1 grid, no breakpoint needed
   ============================================================ */
.preview-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(195px, 1fr));
  gap: var(--space-5);
}
.preview-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding: 28px 24px 24px;
  min-height: 280px;
  border-radius: var(--radius-lg);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, .5) 0%, transparent 8%),     /* glossy top sheen */
    linear-gradient(160deg, rgba(var(--accent-rgb), .16) 0%, var(--bg-elev) 62%);
  border: 1px solid var(--border);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform var(--t-slow) var(--ease-out), box-shadow var(--t-slow) var(--ease-out), border-color var(--t-slow) ease;
}
html.dark .preview-card {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, .04) 0%, transparent 8%),
    linear-gradient(160deg, rgba(var(--accent-rgb), .14) 0%, var(--bg-elev) 62%);
}
/* gradient border-ring on hover */
.preview-card::before {
  content: "";
  position: absolute; inset: 0;
  border-radius: var(--radius-lg);
  padding: 1px;
  background: linear-gradient(135deg, rgba(var(--accent-rgb), .8), transparent 55%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity var(--t-slow) ease;
  pointer-events: none;
}
/* soft accent glow blob top-right */
.preview-card::after {
  content: "";
  position: absolute;
  top: -50px; right: -50px;
  width: 160px; height: 160px;
  background: radial-gradient(circle, rgba(var(--accent-rgb), .32) 0%, transparent 65%);
  filter: blur(14px);
  opacity: .7;
  pointer-events: none;
  transition: opacity var(--t-slow) ease;
}
.preview-card:hover {
  transform: translateY(-8px);
  border-color: rgba(var(--accent-rgb), .45);
  box-shadow: var(--shadow-glow), var(--shadow-lg);
}
.preview-card:hover::before { opacity: 1; }
.preview-card:hover::after { opacity: 1; }
.preview-card:focus-visible { outline: none; box-shadow: 0 0 0 3px rgba(var(--accent-rgb), .4), var(--shadow-lg); }
.preview-card .pv-icon {
  width: 56px; height: 56px;
  display: grid; place-items: center;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--accent-light), var(--accent) 45%, var(--accent-dark));
  color: #fff;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .4), inset 0 -2px 4px rgba(0, 0, 0, .15), 0 10px 24px -4px rgba(var(--accent-rgb), .5);
  flex-shrink: 0;
  position: relative; z-index: 1;
}
.preview-card h3 { font-size: 1.12rem; font-weight: 700; margin: 2px 0 0; position: relative; z-index: 1; }
.preview-card .pv-desc { font-size: .88rem; color: var(--text-mute); margin: 0; flex-grow: 1; position: relative; z-index: 1; }
.preview-card .pv-open {
  display: inline-flex; align-items: center; gap: 6px;
  align-self: flex-start;
  font-weight: 600; font-size: .9rem;
  color: var(--accent);
  padding: 8px 0;
  transition: gap var(--t-base) ease;
  position: relative; z-index: 1;
}
.preview-card:hover .pv-open { gap: 10px; }
.preview-card .pv-tag {
  position: absolute; top: 16px; right: 18px;
  font-size: .62rem; font-weight: 700; text-transform: uppercase; letter-spacing: .1em;
  color: var(--accent);
  background: linear-gradient(180deg, rgba(var(--accent-rgb), .16), rgba(var(--accent-rgb), .08));
  border: 1px solid rgba(var(--accent-rgb), .18);
  padding: 3px 9px; border-radius: 20px;
  z-index: 2;
}

/* ============================================================
   Search bar — instant tool filtering
   ============================================================ */
.search {
  position: relative;
  max-width: 560px;
  margin: 0 auto;
}
.search input {
  width: 100%;
  padding: 16px 20px 16px 50px;
  font-size: 1rem;
  font-family: inherit;
  color: var(--text);
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 999px;
  outline: none;
  box-shadow: var(--shadow-sm);
  transition: border-color var(--t-base) ease, box-shadow var(--t-base) ease;
}
.search input::placeholder { color: var(--text-mute); }
.search input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(var(--accent-rgb), .14), var(--shadow-md);
}
.search .s-ic {
  position: absolute; left: 18px; top: 50%; transform: translateY(-50%);
  color: var(--text-mute);
  pointer-events: none;
}
.search .s-count {
  position: absolute; right: 18px; top: 50%; transform: translateY(-50%);
  font-size: .78rem; color: var(--text-mute);
  font-variant-numeric: tabular-nums;
}

/* ============================================================
   Category chips — filter pills
   ============================================================ */
.cat-chips {
  display: flex; flex-wrap: wrap; justify-content: center; gap: 8px;
}
.chip {
  padding: 8px 16px;
  font-size: .85rem; font-weight: 600; font-family: inherit;
  color: var(--text-soft);
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 999px;
  cursor: pointer;
  min-height: 38px;
  display: inline-flex; align-items: center;
  box-shadow: var(--shadow-sm);
  transition: all var(--t-base) ease;
}
.chip:hover { border-color: rgba(var(--accent-rgb), .5); color: var(--accent); transform: translateY(-1px); }
.chip.active {
  background: linear-gradient(180deg, var(--accent-light), var(--accent) 55%, var(--accent-dark));
  color: #fff;
  border-color: var(--accent);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .3), 0 6px 16px -4px rgba(var(--accent-rgb), .45);
}

/* ---- Tool count indicator + empty state ---- */
.tool-count { text-align: center; font-size: .85rem; color: var(--text-mute); margin: 0; }
.empty-state {
  text-align: center;
  padding: 48px 24px;
  color: var(--text-mute);
}
.empty-state svg { color: var(--accent); opacity: .5; margin-bottom: 12px; }

/* ---- Preview/feature cards: tablet + wide-screen balance ---- */
@media (min-width: 761px) and (max-width: 980px) {
  .preview-grid { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
}
/* On ultra-wide screens, cap the flagship grid at 5 columns for balance */
@media (min-width: 1180px) {
  .preview-grid { grid-template-columns: repeat(5, 1fr); }
}

/* ---- Subtle utility: live region announces filter results to screen readers ---- */
.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;
}