/* Browser-Use inspired design system for dl.trung.vip */

:root {
  /* Colors */
  --bg-page: #09090b;
  --bg-card: #0A0A0D;
  --bg-card-2: #0B0B0E;
  --bg-zinc-900: #18181b;
  --bg-zinc-800: #27272a;
  --bg-zinc-950: #09090b;
  --border-zinc-800: #27272a;
  --border-zinc-700: #3f3f46;
  --border-zinc-900: #18181b;

  --text-white: #ffffff;
  --text-zinc-300: #d4d4d8;
  --text-zinc-400: #a1a1aa;
  --text-zinc-500: #71717a;
  --text-zinc-600: #52525b;
  --text-zinc-700: #3f3f46;

  --pumpkin-500: #fe750e;
  --pumpkin-400: #ff8a3d;
  --pumpkin-600: #e56808;
  --pumpkin-glow: rgba(254, 117, 14, 0.15);
  --pumpkin-glow-strong: rgba(254, 117, 14, 0.40);

  --emerald-500: #10b981;

  /* Type */
  --font-sans: -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI", Roboto, sans-serif;
  --font-serif: "Tiempos Headline", "Charter", "Iowan Old Style", "Apple Garamond",
    Georgia, "Times New Roman", serif;
  --font-mono: "JetBrains Mono", "SF Mono", "Fira Code", "Menlo", "Monaco", "Courier New", monospace;
}

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

html, body {
  background: var(--bg-page);
  color: var(--text-white);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  line-height: 1.5;
}

body {
  background-image:
    radial-gradient(at 0% 0%, rgba(254, 117, 14, 0.04) 0px, transparent 50%),
    radial-gradient(at 100% 0%, rgba(254, 117, 14, 0.02) 0px, transparent 50%),
    radial-gradient(at 50% 100%, rgba(254, 117, 14, 0.03) 0px, transparent 50%);
  background-attachment: fixed;
}

a { color: inherit; text-decoration: none; }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(9, 9, 11, 0.7);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-zinc-800);
}
.header-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-serif);
  font-size: 18px;
  letter-spacing: -0.01em;
  color: var(--text-white);
}
.brand-mark {
  width: 22px;
  height: 22px;
  background: var(--pumpkin-500);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #000;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 13px;
  box-shadow: 0 0 18px var(--pumpkin-glow);
}
.brand-tag {
  font-family: var(--font-mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--text-zinc-500);
  border: 1px solid var(--border-zinc-800);
  padding: 3px 8px;
  margin-left: 6px;
}
.nav {
  display: flex;
  gap: 24px;
  font-size: 13px;
  color: var(--text-zinc-500);
  align-items: center;
}
.nav a {
  transition: color 200ms ease;
}
.nav a:hover { color: var(--text-white); }

.header-cta {
  display: flex;
  align-items: center;
  gap: 16px;
}
.cta-link {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-zinc-500);
  transition: color 200ms ease;
}
.cta-link:hover { color: var(--text-white); }
.cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  background: var(--pumpkin-500);
  color: #000;
  border: 1px solid var(--pumpkin-400);
  transition: background 200ms ease;
}
.cta-btn:hover { background: var(--pumpkin-400); }

/* ---------- Hero ---------- */
.hero {
  max-width: 1280px;
  margin: 0 auto;
  padding: 80px 24px 56px;
  text-align: center;
}
.hero-eyebrow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 14px;
}
.hero-eyebrow .line {
  height: 1px;
  width: 24px;
  background: var(--border-zinc-700);
}
.hero-eyebrow .label {
  font-family: var(--font-mono);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--text-zinc-400);
}
.hero h1 {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(36px, 5.5vw, 64px);
  line-height: 1.05;
  letter-spacing: -0.025em;
  color: var(--text-white);
  max-width: 900px;
  margin: 0 auto;
}
.hero h1 em {
  font-style: italic;
  color: var(--pumpkin-500);
}
.hero-sub {
  margin-top: 18px;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--text-zinc-500);
  max-width: 620px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.6;
}

/* ---------- Filter / Search bar ---------- */
.filter-bar {
  max-width: 1280px;
  margin: 32px auto 0;
  padding: 0 24px;
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
}
.search-box {
  flex: 1 1 320px;
  min-width: 240px;
  position: relative;
  border: 1px solid var(--border-zinc-800);
  background: var(--bg-card);
  display: flex;
  align-items: center;
  padding: 0 14px;
  transition: border-color 200ms ease;
}
.search-box:focus-within {
  border-color: var(--pumpkin-500);
  box-shadow: 0 0 0 3px var(--pumpkin-glow);
}
.search-box svg {
  width: 14px;
  height: 14px;
  color: var(--text-zinc-500);
  flex-shrink: 0;
}
.search-box input {
  flex: 1;
  background: transparent;
  border: 0;
  outline: 0;
  color: var(--text-white);
  font-family: var(--font-mono);
  font-size: 13px;
  padding: 12px 10px;
}
.search-box input::placeholder { color: var(--text-zinc-600); }

.filter-chips {
  display: flex;
  gap: 4px;
  border: 1px solid var(--border-zinc-800);
  background: var(--bg-card);
  padding: 4px;
}
.chip {
  padding: 8px 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-zinc-500);
  background: transparent;
  border: 0;
  cursor: pointer;
  transition: all 200ms ease;
}
.chip:hover { color: var(--text-white); }
.chip.active {
  background: var(--bg-zinc-800);
  color: var(--text-white);
}

/* ---------- Tool grid ---------- */
.tools {
  max-width: 1280px;
  margin: 24px auto 0;
  padding: 0 24px 80px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 12px;
}
.tool-card {
  position: relative;
  display: flex;
  flex-direction: column;
  border: 1px solid var(--border-zinc-800);
  background: var(--bg-card);
  padding: 22px;
  cursor: pointer;
  transition: all 250ms ease;
  text-decoration: none;
  color: inherit;
  overflow: hidden;
}
.tool-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--pumpkin-glow), transparent);
  opacity: 0;
  transition: opacity 250ms ease;
}
.tool-card:hover {
  border-color: var(--border-zinc-700);
  background: #0c0c10;
  transform: translateY(-2px);
}
.tool-card:hover::before { opacity: 1; }

.tool-card .cat {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 9px;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--pumpkin-500);
  margin-bottom: 12px;
  width: fit-content;
}
.tool-card h3 {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 400;
  color: var(--text-white);
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}
.tool-card .desc {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-zinc-500);
  line-height: 1.5;
  flex: 1;
}
.tool-card .arrow {
  margin-top: 18px;
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-zinc-600);
  transition: color 200ms ease;
}
.tool-card:hover .arrow { color: var(--pumpkin-500); }
.tool-card .arrow svg { width: 12px; height: 12px; }

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--border-zinc-800);
  margin-top: 60px;
  padding: 40px 24px 24px;
}
.footer-inner {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}
.footer-left {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-zinc-600);
  text-transform: uppercase;
  letter-spacing: 0.12em;
}
.footer-left .dot {
  width: 6px;
  height: 6px;
  background: var(--emerald-500);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}
.footer-right {
  display: flex;
  gap: 18px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-zinc-500);
}
.footer-right a { transition: color 200ms ease; }
.footer-right a:hover { color: var(--text-white); }

@keyframes pulse {
  0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.5); }
  50% { opacity: 0.5; box-shadow: 0 0 0 6px rgba(16, 185, 129, 0); }
}

/* ---------- Tool runner page ---------- */
.runner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 32px 24px 80px;
}
.runner-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 22px;
}
.runner-back {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-zinc-500);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: color 200ms ease;
}
.runner-back:hover { color: var(--pumpkin-500); }
.runner-title {
  font-family: var(--font-serif);
  font-size: 32px;
  font-weight: 400;
  letter-spacing: -0.02em;
  color: var(--text-white);
}
.runner-form {
  border: 1px solid var(--border-zinc-800);
  background: var(--bg-card);
  padding: 24px;
  margin-bottom: 22px;
}
.form-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
  margin-bottom: 14px;
}
.form-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.form-field label {
  font-family: var(--font-mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--text-zinc-500);
}
.form-field input,
.form-field select {
  background: var(--bg-page);
  border: 1px solid var(--border-zinc-800);
  color: var(--text-white);
  font-family: var(--font-mono);
  font-size: 13px;
  padding: 11px 12px;
  outline: 0;
  transition: border-color 200ms ease;
}
.form-field input:focus,
.form-field select:focus {
  border-color: var(--pumpkin-500);
  box-shadow: 0 0 0 3px var(--pumpkin-glow);
}
.form-submit {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 11px 22px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  background: var(--pumpkin-500);
  color: #000;
  border: 1px solid var(--pumpkin-400);
  cursor: pointer;
  transition: background 200ms ease;
}
.form-submit:hover { background: var(--pumpkin-400); }

.runner-result {
  border: 1px solid var(--border-zinc-800);
  background: var(--bg-card);
  padding: 28px;
  color: var(--text-zinc-300);
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.6;
  min-height: 220px;
}
.runner-result h1, .runner-result h2, .runner-result h3, .runner-result h4 {
  font-family: var(--font-serif);
  color: var(--text-white);
  font-weight: 400;
  margin: 14px 0 10px;
  letter-spacing: -0.01em;
}
.runner-result h1 { font-size: 26px; }
.runner-result h2 { font-size: 20px; }
.runner-result h3 { font-size: 16px; }
.runner-result table {
  width: 100%;
  border-collapse: collapse;
  margin: 12px 0;
}
.runner-result th, .runner-result td {
  text-align: left;
  padding: 10px 12px;
  border: 1px solid var(--border-zinc-800);
  font-size: 12px;
}
.runner-result th {
  background: var(--bg-zinc-900);
  color: var(--pumpkin-500);
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: 10px;
  font-weight: 500;
}
.runner-result a { color: var(--pumpkin-500); text-decoration: underline; }
.runner-result a:hover { color: var(--pumpkin-400); }
.runner-result hr { border: 0; border-top: 1px solid var(--border-zinc-800); margin: 18px 0; }
.runner-result input[type=text] {
  background: var(--bg-page);
  border: 1px solid var(--border-zinc-800);
  color: var(--text-white);
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 6px 8px;
  margin: 2px 4px;
}
.runner-result input[type=submit] {
  background: var(--pumpkin-500);
  color: #000;
  border: 1px solid var(--pumpkin-400);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  padding: 7px 14px;
  cursor: pointer;
  margin: 2px 0;
}
.runner-result select {
  background: var(--bg-page);
  border: 1px solid var(--border-zinc-800);
  color: var(--text-white);
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 6px 8px;
  margin: 2px 0;
}
/* CGI-emitted class hooks */
.runner-form input.text,
.runner-form input[type=text],
.runner-form input:not([type=submit]):not([type=hidden]),
.runner-result input.text,
.runner-result input[type=text],
.runner-result input:not([type=submit]):not([type=hidden]) {
  background: var(--bg-page);
  border: 1px solid var(--border-zinc-800);
  color: var(--text-white);
  font-family: var(--font-mono);
  font-size: 13px;
  padding: 10px 12px;
  outline: 0;
  transition: border-color 200ms ease;
}
.runner-form input[type=submit],
.runner-form button[type=submit],
.runner-result input[type=submit],
.runner-result button[type=submit] {
  background: var(--pumpkin-500);
  color: #000;
  border: 1px solid var(--pumpkin-400);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 10px 20px;
  cursor: pointer;
  transition: background 200ms ease;
  margin: 8px 0 0;
}
.runner-form input[type=submit]:hover,
.runner-result input[type=submit]:hover {
  background: var(--pumpkin-400);
}
.runner-form input.text:focus,
.runner-form input[type=text]:focus,
.runner-result input.text:focus,
.runner-result input[type=text]:focus {
  border-color: var(--pumpkin-500);
  box-shadow: 0 0 0 3px var(--pumpkin-glow);
}
.runner-form select.briefselect,
.runner-form select,
.runner-result select.briefselect,
.runner-result select {
  background: var(--bg-page);
  border: 1px solid var(--border-zinc-800);
  color: var(--text-white);
  font-family: var(--font-mono);
  font-size: 13px;
  padding: 10px 12px;
  outline: 0;
}
.runner-form table,
.runner-result table {
  width: 100%;
  border-collapse: collapse;
  margin: 12px 0;
}
.runner-form table td,
.runner-result table td {
  padding: 8px 10px;
  font-size: 13px;
  color: var(--text-zinc-300);
  border: 0;
}
.runner-form table td:first-child {
  font-family: var(--font-mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--text-zinc-500);
  white-space: nowrap;
  width: 1%;
}
.runner-result pre {
  background: var(--bg-page);
  border: 1px solid var(--border-zinc-800);
  padding: 12px;
  overflow-x: auto;
  font-size: 12px;
}
.runner-result .headerframe, .runner-result .headerbody,
.runner-result .headerhr, .runner-result .fullindexframe {
  all: unset;
}
.runner-result .highlight { color: var(--pumpkin-500); }

.empty {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-zinc-600);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  text-align: center;
  padding: 60px 0;
}

@media (max-width: 720px) {
  .header-inner { flex-wrap: wrap; }
  .nav { display: none; }
  .hero { padding: 56px 18px 36px; }
  .tools { padding: 0 18px 60px; gap: 10px; }
  .runner { padding: 24px 18px 60px; }
}