/* ToolNest — original design. Indigo/violet accent, card-based, mobile-first. */

:root {
  --bg: #f7f8fc;
  --surface: #ffffff;
  --surface-2: #f1f4fa;
  --text: #101828;
  --muted: #667085;
  --border: #e4e7f0;
  --accent: #5b5bd6;
  --accent-2: #8b5cf6;
  --accent-soft: #eef0ff;
  --accent-text: #ffffff;
  --danger: #e5484d;
  --success: #12a56b;
  --warning: #e8930c;
  --radius: 14px;
  --radius-sm: 9px;
  --shadow: 0 1px 2px rgba(16, 24, 40, .06), 0 10px 28px -14px rgba(16, 24, 40, .18);
  --font: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: ui-monospace, "SF Mono", "Cascadia Code", Menlo, Consolas, monospace;
}

[data-theme="dark"] {
  --bg: #0b0f1c;
  --surface: #141a2e;
  --surface-2: #1b2340;
  --text: #e9edf7;
  --muted: #9aa4bf;
  --border: #263054;
  --accent: #7c7cf4;
  --accent-2: #a78bfa;
  --accent-soft: #20264d;
  --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 10px 28px -14px rgba(0, 0, 0, .6);
}

* { box-sizing: border-box; }
/* Respect the `hidden` attribute even where component display rules would override it
   (e.g. .btn sets display:inline-flex, .stat-grid sets display:grid). */
[hidden] { display: none !important; }
html { scroll-behavior: smooth; }
html, body { overflow-x: clip; }
body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
img, svg { max-width: 100%; }

.container { width: 100%; max-width: 1120px; margin: 0 auto; padding: 0 1.1rem; }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.header-inner { display: flex; align-items: center; gap: .9rem; height: 64px; }
.logo { font-weight: 800; font-size: 1.35rem; letter-spacing: -.02em; color: var(--text); display: flex; align-items: center; gap: .5rem; }
.logo:hover { text-decoration: none; }
.logo-mark {
  width: 32px; height: 32px; border-radius: 10px; flex: 0 0 32px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  display: inline-flex; align-items: center; justify-content: center;
  color: #fff; font-weight: 800; font-size: 1.05rem;
}
.main-nav { display: none; gap: 1.1rem; margin-left: .6rem; }
.main-nav a { color: var(--muted); font-weight: 500; font-size: .95rem; }
.main-nav a:hover, .main-nav a.active { color: var(--text); text-decoration: none; }
.header-actions { margin-left: auto; display: flex; align-items: center; gap: .55rem; }
.icon-btn {
  border: 1px solid var(--border); background: var(--surface); color: var(--text);
  border-radius: var(--radius-sm); padding: .45rem .7rem; cursor: pointer; font-size: .9rem;
  display: inline-flex; align-items: center; gap: .45rem; font-family: inherit;
}
.icon-btn:hover { border-color: var(--accent); }
/* Language picker: compact dropdown with searchable list */
.lang-picker { position: relative; }
.lang-btn { font-weight: 600; max-width: 11rem; }
.lang-btn [data-lang-current] { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.lang-btn .lang-caret { color: var(--muted); font-size: .7rem; }
.lang-btn.loading { opacity: .55; pointer-events: none; }
.lang-menu {
  position: absolute; top: calc(100% + 6px); right: 0; z-index: 60;
  width: 260px; max-height: 330px; display: flex; flex-direction: column;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: 0 12px 32px rgba(0,0,0,.18); overflow: hidden;
}
.lang-menu[hidden] { display: none; }
[dir="rtl"] .lang-menu { right: auto; left: 0; }
.lang-search {
  margin: .5rem; padding: .45rem .6rem; border: 1px solid var(--border);
  border-radius: var(--radius-sm); background: var(--surface-2); color: var(--text);
  font-family: inherit; font-size: .85rem;
}
.lang-search:focus { outline: none; border-color: var(--accent); }
.lang-list { list-style: none; margin: 0; padding: .25rem; overflow-y: auto; }
.lang-list li {
  display: flex; justify-content: space-between; align-items: center; gap: .5rem;
  padding: .45rem .6rem; border-radius: var(--radius-sm); cursor: pointer; font-size: .88rem;
}
.lang-list li:hover { background: var(--surface-2); }
.lang-list li.selected { background: color-mix(in srgb, var(--accent) 14%, transparent); font-weight: 600; }
.lang-list .lang-code { color: var(--muted); font-size: .75rem; font-family: var(--mono); }
.icon-btn kbd {
  font-family: var(--mono); font-size: .72rem; background: var(--surface-2);
  border: 1px solid var(--border); border-radius: 5px; padding: .05rem .35rem; color: var(--muted);
}

/* ---------- Hero ---------- */
.hero {
  padding: 3.4rem 0 2.6rem; text-align: center;
  background:
    radial-gradient(600px 260px at 20% 0%, color-mix(in srgb, var(--accent) 14%, transparent), transparent 70%),
    radial-gradient(600px 260px at 85% 10%, color-mix(in srgb, var(--accent-2) 12%, transparent), transparent 70%);
}
.hero h1 { font-size: clamp(2rem, 5.4vw, 3.1rem); letter-spacing: -.03em; margin: 0 0 .7rem; line-height: 1.12; }
.hero h1 .grad {
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero p { color: var(--muted); max-width: 620px; margin: 0 auto 1.4rem; font-size: 1.06rem; }
.hero-cta { display: flex; gap: .7rem; justify-content: center; flex-wrap: wrap; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  border: 1px solid transparent; border-radius: var(--radius-sm);
  padding: .65rem 1.25rem; font-size: .95rem; font-weight: 600; cursor: pointer;
  font-family: inherit; transition: transform .06s ease, box-shadow .15s ease;
}
.btn:active { transform: translateY(1px); }
.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: var(--accent-text); box-shadow: var(--shadow);
}
.btn-primary:hover { filter: brightness(1.06); text-decoration: none; color: var(--accent-text); }
.btn-ghost { background: var(--surface); border-color: var(--border); color: var(--text); }
.btn-ghost:hover { border-color: var(--accent); text-decoration: none; }
.btn-sm { padding: .42rem .8rem; font-size: .85rem; }

/* ---------- Search overlay ---------- */
.search-overlay {
  position: fixed; inset: 0; z-index: 100; display: none;
  background: rgba(10, 14, 28, .55); backdrop-filter: blur(3px);
  padding: 12vh 1rem 1rem;
}
.search-overlay.open { display: block; }
.search-box {
  max-width: 620px; margin: 0 auto; background: var(--surface);
  border: 1px solid var(--border); border-radius: 16px; box-shadow: var(--shadow); overflow: hidden;
}
.search-box input {
  width: 100%; border: 0; outline: 0; background: transparent; color: var(--text);
  font-size: 1.05rem; padding: 1rem 1.2rem; font-family: inherit;
  border-bottom: 1px solid var(--border);
}
.search-results { max-height: 46vh; overflow-y: auto; padding: .5rem; }
.search-result {
  display: flex; gap: .8rem; align-items: center; padding: .7rem .8rem;
  border-radius: 10px; color: var(--text); cursor: pointer;
}
.search-result:hover, .search-result.active { background: var(--accent-soft); text-decoration: none; }
.search-result .cat { font-size: .72rem; color: var(--muted); text-transform: uppercase; letter-spacing: .06em; }
.search-result .name { font-weight: 600; }
.search-result .desc { font-size: .85rem; color: var(--muted); }
.search-empty { padding: 1.4rem; text-align: center; color: var(--muted); }

/* ---------- Chips & tool grid ---------- */
.section-title { font-size: 1.5rem; letter-spacing: -.02em; margin: 2.4rem 0 .4rem; }
.section-sub { color: var(--muted); margin: 0 0 1.2rem; }
.chips { display: flex; gap: .55rem; flex-wrap: wrap; margin-bottom: 1.4rem; }
.chip {
  border: 1px solid var(--border); background: var(--surface); color: var(--muted);
  border-radius: 999px; padding: .42rem 1rem; font-size: .88rem; font-weight: 500;
  cursor: pointer; font-family: inherit;
}
.chip:hover { border-color: var(--accent); color: var(--text); }
.chip.active { background: var(--accent-soft); border-color: var(--accent); color: var(--accent); font-weight: 600; }

.category-block { margin-bottom: 1.8rem; }
.category-block h3 { font-size: 1.12rem; margin: 0 0 .8rem; display: flex; align-items: center; gap: .55rem; }
.category-block h3 .emoji { font-size: 1.25rem; }
.tool-grid { display: grid; grid-template-columns: 1fr; gap: .9rem; }
.tool-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 1.15rem 1.2rem; box-shadow: var(--shadow); color: var(--text);
  display: flex; flex-direction: column; gap: .35rem;
  transition: transform .12s ease, border-color .12s ease;
}
.tool-card:hover { text-decoration: none; transform: translateY(-2px); border-color: var(--accent); }
.tool-card .t-icon {
  width: 40px; height: 40px; border-radius: 11px; flex: 0 0 40px;
  background: var(--accent-soft); display: inline-flex; align-items: center; justify-content: center;
  font-size: 1.25rem; margin-bottom: .35rem;
}
.tool-card .t-name { font-weight: 700; font-size: 1.02rem; }
.tool-card .t-desc { font-size: .9rem; color: var(--muted); flex: 1; }
.tool-card .t-go { font-size: .85rem; font-weight: 600; color: var(--accent); }

/* ---------- Features strip ---------- */
.features { display: grid; grid-template-columns: 1fr; gap: .9rem; margin: 2.6rem 0; }
.feature {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 1.2rem; box-shadow: var(--shadow);
}
.feature .f-icon { font-size: 1.5rem; }
.feature h4 { margin: .5rem 0 .3rem; font-size: 1.02rem; }
.feature p { margin: 0; color: var(--muted); font-size: .92rem; }

/* ---------- Tool page ---------- */
.tool-page { padding: 2rem 0 3rem; }
.breadcrumb { font-size: .88rem; color: var(--muted); margin-bottom: 1rem; display: inline-block; }
.tool-head { margin-bottom: 1.4rem; }
.tool-head h1 { font-size: clamp(1.6rem, 4vw, 2.2rem); letter-spacing: -.02em; margin: 0 0 .4rem; }
.tool-head p { color: var(--muted); margin: 0; max-width: 640px; }
.tool-ui {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 1.3rem; margin-bottom: 1.8rem;
}
.field { margin-bottom: 1rem; }
.field label { display: block; font-weight: 600; font-size: .9rem; margin-bottom: .4rem; }
.field .hint { font-size: .82rem; color: var(--muted); font-weight: 400; }
textarea, input[type="text"], input[type="number"], input[type="date"], select {
  width: 100%; border: 1px solid var(--border); border-radius: var(--radius-sm);
  background: var(--bg); color: var(--text); padding: .65rem .8rem;
  font-size: .95rem; font-family: inherit;
}
textarea { min-height: 150px; resize: vertical; font-family: var(--mono); font-size: .88rem; }
textarea:focus, input:focus, select:focus { outline: 2px solid var(--accent); outline-offset: -1px; border-color: var(--accent); }
input[type="range"] { width: 100%; accent-color: var(--accent); }
input[type="checkbox"] { width: 1.05rem; height: 1.05rem; accent-color: var(--accent); }
.check-row { display: flex; align-items: center; gap: .55rem; margin: .35rem 0; font-size: .93rem; }
.btn-row { display: flex; gap: .6rem; flex-wrap: wrap; margin: .9rem 0; }
.output {
  background: var(--surface-2); border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: .9rem 1rem; font-family: var(--mono); font-size: .88rem; white-space: pre-wrap;
  word-break: break-word; min-height: 3rem; max-height: 380px; overflow-y: auto;
}
.output:empty::before { content: "Output will appear here…"; color: var(--muted); font-family: var(--font); }
.alert {
  border-radius: var(--radius-sm); padding: .7rem 1rem; font-size: .9rem; margin: .8rem 0;
  border: 1px solid transparent;
}
.alert-error { background: color-mix(in srgb, var(--danger) 10%, transparent); border-color: var(--danger); color: var(--danger); }
.alert-success { background: color-mix(in srgb, var(--success) 10%, transparent); border-color: var(--success); color: var(--success); }
.stat-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: .7rem; margin: .9rem 0; }
.stat { background: var(--surface-2); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: .8rem; text-align: center; }
.stat .v { font-size: 1.35rem; font-weight: 800; color: var(--accent); }
.stat .l { font-size: .78rem; color: var(--muted); text-transform: uppercase; letter-spacing: .05em; }
.meter { height: 10px; border-radius: 999px; background: var(--surface-2); border: 1px solid var(--border); overflow: hidden; margin-top: .4rem; }
.meter > div { height: 100%; width: 0; border-radius: 999px; background: linear-gradient(90deg, var(--danger), var(--warning), var(--success)); transition: width .25s ease; }
.qr-wrap { display: flex; flex-direction: column; align-items: center; gap: .8rem; padding: 1rem; }
.qr-wrap img, .qr-wrap canvas { border: 8px solid #fff; border-radius: 8px; box-shadow: var(--shadow); }

.howto, .faq, .related { margin-bottom: 1.8rem; }
.howto h2, .faq h2, .related h2 { font-size: 1.25rem; margin: 0 0 .8rem; }
.howto ol { margin: 0; padding-left: 1.3rem; }
.howto li { margin-bottom: .5rem; }
.faq details { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: .8rem 1rem; margin-bottom: .6rem; }
.faq summary { font-weight: 600; cursor: pointer; }
.faq p { color: var(--muted); margin: .5rem 0 0; font-size: .94rem; }
.related-grid { display: grid; grid-template-columns: 1fr; gap: .7rem; }
.related a {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: .8rem 1rem; color: var(--text); font-weight: 600; font-size: .94rem;
  display: flex; justify-content: space-between; align-items: center; gap: .6rem;
}
.related a:hover { border-color: var(--accent); text-decoration: none; }
.related a span:last-child { color: var(--accent); }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--border); margin-top: 2.5rem; padding: 2rem 0; color: var(--muted); font-size: .9rem; }
.footer-inner { display: flex; flex-direction: column; gap: .8rem; }
.footer-links { display: flex; gap: 1.1rem; flex-wrap: wrap; }
.footer-links a { color: var(--muted); }

/* ---------- Toast ---------- */
.toast {
  position: fixed; bottom: 1.2rem; left: 50%; transform: translateX(-50%) translateY(20px);
  background: var(--text); color: var(--bg); padding: .6rem 1.1rem; border-radius: 999px;
  font-size: .88rem; font-weight: 600; opacity: 0; pointer-events: none; transition: all .25s ease; z-index: 200;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ---------- File tools ---------- */
.dropzone {
  border: 2px dashed var(--border); border-radius: var(--radius);
  background: var(--surface-2); padding: 2.1rem 1.2rem; text-align: center;
  cursor: pointer; transition: border-color .15s ease, background .15s ease;
}
.dropzone:hover, .dropzone.dragging { border-color: var(--accent); background: var(--accent-soft); }
.dropzone:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.dz-icon { font-size: 2rem; }
.dz-text { margin: .5rem 0 .8rem; color: var(--muted); display: flex; flex-direction: column; gap: .25rem; align-items: center; }
.dz-text strong { color: var(--text); font-size: 1.02rem; }
.dz-file { margin-top: .7rem; font-size: .84rem; color: var(--muted); word-break: break-all; }
.dz-file:empty { display: none; }
.privacy-note {
  display: flex; gap: .55rem; align-items: flex-start;
  background: var(--accent-soft); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: .65rem .95rem;
  font-size: .87rem; color: var(--muted); margin: 1.1rem 0 0;
}
.privacy-note strong { color: var(--text); }
.order-list { list-style: none; margin: .8rem 0; padding: 0; display: flex; flex-direction: column; gap: .5rem; }
.order-list li {
  display: flex; align-items: center; gap: .6rem;
  background: var(--surface-2); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: .55rem .8rem; font-size: .9rem;
}
.order-list .fname { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.order-list .mini-btn {
  border: 1px solid var(--border); background: var(--surface); color: var(--text);
  border-radius: 6px; padding: .2rem .55rem; cursor: pointer; font-size: .8rem; font-family: inherit;
}
.order-list .mini-btn:hover { border-color: var(--accent); }
.progress-row { display: flex; align-items: center; gap: .7rem; margin: .8rem 0; font-size: .88rem; color: var(--muted); }
.progress-row .meter { flex: 1; margin: 0; }
.thumb-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); gap: .8rem; margin: 1rem 0; }
.thumb {
  background: var(--surface-2); border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: .6rem; text-align: center; font-size: .8rem; color: var(--muted);
  display: flex; flex-direction: column; gap: .5rem; align-items: center;
}
.thumb img, .thumb canvas { max-width: 100%; border-radius: 6px; background: #fff; }
.result-table-wrap { overflow-x: auto; margin: .8rem 0; border: 1px solid var(--border); border-radius: var(--radius-sm); }
.result-table { border-collapse: collapse; width: 100%; font-size: .85rem; }
.result-table th, .result-table td { border: 1px solid var(--border); padding: .45rem .6rem; text-align: left; }
.result-table th { background: var(--surface-2); font-weight: 700; }
.result-table td { font-family: var(--mono); font-size: .8rem; }
.two-col { display: grid; grid-template-columns: 1fr; gap: 1rem; }

/* Converter tools: input & output side-by-side on desktop, stacked on mobile */
@media (min-width: 640px) {
  .tool-ui.io-2col { display: grid; grid-template-columns: 1fr 1fr; gap: .5rem 1.2rem; align-items: start; }
  .tool-ui.io-2col .io-in { grid-column: 1; grid-row: 1; margin-bottom: 0; }
  .tool-ui.io-2col .io-out { grid-column: 2; grid-row: 1; margin-bottom: 0; }
  .tool-ui.io-2col .io-in textarea, .tool-ui.io-2col .io-out textarea { min-height: 230px; }
  .tool-ui.io-2col > .btn-row,
  .tool-ui.io-2col > .privacy-note,
  .tool-ui.io-2col > p { grid-column: 1 / -1; }
}

/* ---------- Responsive ---------- */
@media (max-width: 639px) {
  /* Compact header on phones: icon-only language button, no kbd hint */
  .header-inner { gap: .5rem; height: 58px; }
  .logo { font-size: 1.15rem; }
  .lang-btn { max-width: none; padding: .45rem .55rem; }
  .lang-btn [data-lang-current], .lang-btn .lang-caret { display: none; }
  .icon-btn kbd { display: none; }
  .icon-btn { padding: .45rem .55rem; }
  .header-actions { gap: .4rem; }
  .hero { padding: 2.2rem 0 1.8rem; }
  /* Language dropdown: full-width sheet pinned under header on phones */
  .lang-menu {
    position: fixed; top: 62px; left: .9rem; right: .9rem;
    width: auto; max-height: 66vh;
  }
  [dir="rtl"] .lang-menu { left: .9rem; right: .9rem; }
}
@media (min-width: 640px) {
  .two-col { grid-template-columns: 1fr 1fr; }
  .main-nav { display: flex; }
  .tool-grid { grid-template-columns: repeat(2, 1fr); }
  .features { grid-template-columns: repeat(3, 1fr); }
  .related-grid { grid-template-columns: repeat(3, 1fr); }
  .stat-grid { grid-template-columns: repeat(4, 1fr); }
  .footer-inner { flex-direction: row; justify-content: space-between; align-items: center; }
}
@media (min-width: 960px) {
  .tool-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; scroll-behavior: auto !important; }
}