/* ==========================================================================
   UTM Builder – Trislee Digital
   Design tokens: navy professional + action green, Be Vietnam Pro
   ========================================================================== */

:root {
  --primary: #1E3A5F;
  --on-primary: #FFFFFF;
  --secondary: #2563EB;
  --accent: #047857;
  --accent-hover: #065F46;
  --on-accent: #FFFFFF;
  --bg: #F8FAFC;
  --surface: #FFFFFF;
  --surface-2: #F1F5F9;
  --fg: #0F172A;
  --fg-muted: #475569;
  --fg-subtle: #64748B;
  --border: #E2E8F0;
  --border-strong: #CBD5E1;
  --danger: #DC2626;
  --danger-bg: #FEF2F2;
  --warn: #B45309;
  --warn-bg: #FFFBEB;
  --info-bg: #EFF6FF;
  --ring: #2563EB;
  --code-bg: #F1F5F9;

  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, .05);
  --shadow: 0 1px 3px rgba(15, 23, 42, .06), 0 8px 24px -12px rgba(15, 23, 42, .12);

  --font: 'Be Vietnam Pro', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Consolas, monospace;
  --ease: cubic-bezier(.2, .8, .2, 1);
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --primary: #93C5FD;
    --on-primary: #0B1220;
    --secondary: #60A5FA;
    --accent: #10B981;
    --accent-hover: #34D399;
    --on-accent: #052E1F;
    --bg: #0B1220;
    --surface: #111A2E;
    --surface-2: #17223A;
    --fg: #E2E8F0;
    --fg-muted: #A5B4C8;
    --fg-subtle: #8494AB;
    --border: #22304A;
    --border-strong: #33445F;
    --danger: #F87171;
    --danger-bg: #2A1316;
    --warn: #FBBF24;
    --warn-bg: #2A2110;
    --info-bg: #13233F;
    --ring: #60A5FA;
    --code-bg: #0E1628;
    --shadow: 0 1px 3px rgba(0, 0, 0, .3), 0 8px 24px -12px rgba(0, 0, 0, .5);
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --primary: #93C5FD;
  --on-primary: #0B1220;
  --secondary: #60A5FA;
  --accent: #10B981;
  --accent-hover: #34D399;
  --on-accent: #052E1F;
  --bg: #0B1220;
  --surface: #111A2E;
  --surface-2: #17223A;
  --fg: #E2E8F0;
  --fg-muted: #A5B4C8;
  --fg-subtle: #8494AB;
  --border: #22304A;
  --border-strong: #33445F;
  --danger: #F87171;
  --danger-bg: #2A1316;
  --warn: #FBBF24;
  --warn-bg: #2A2110;
  --info-bg: #13233F;
  --ring: #60A5FA;
  --code-bg: #0E1628;
  --shadow: 0 1px 3px rgba(0, 0, 0, .3), 0 8px 24px -12px rgba(0, 0, 0, .5);
  color-scheme: dark;
}

/* ---------- Base ---------- */
*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  color: var(--fg);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3 { line-height: 1.25; margin: 0; letter-spacing: -0.01em; }
a { color: var(--secondary); }
code { font-family: var(--mono); font-size: .875em; }
svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; flex: none; }
button, input, select { font: inherit; color: inherit; }
button { cursor: pointer; }
:focus-visible { outline: 3px solid var(--ring); outline-offset: 2px; border-radius: 6px; }

.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 16px; }
@media (min-width: 768px) { .container { padding: 0 24px; } }

.skip-link {
  position: absolute; left: 16px; top: -48px; z-index: 100;
  background: var(--primary); color: var(--on-primary);
  padding: 10px 16px; border-radius: var(--radius-sm); text-decoration: none;
  transition: top .2s var(--ease);
}
.skip-link:focus { top: 12px; }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 20;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: saturate(1.4) blur(10px);
  -webkit-backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid var(--border);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 60px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--fg); text-decoration: none; font-weight: 500; }
.brand b { font-weight: 800; color: var(--primary); }
.brand-mark {
  display: grid; place-items: center; width: 32px; height: 32px; border-radius: 8px;
  background: #1E3A5F; color: #fff;
}
.header-nav { display: flex; align-items: center; gap: 4px; }
.header-nav a {
  color: var(--fg-muted); text-decoration: none; font-size: 15px; font-weight: 500;
  padding: 10px 12px; border-radius: var(--radius-sm); min-height: 44px; display: inline-flex; align-items: center;
  transition: color .15s, background-color .15s;
}
.header-nav a:hover { color: var(--fg); background: var(--surface-2); }
@media (max-width: 480px) { .header-nav a { display: none; } }

.icon-btn {
  display: grid; place-items: center; width: 44px; height: 44px;
  border: 1px solid var(--border); background: var(--surface); border-radius: var(--radius-sm);
  color: var(--fg-muted); transition: color .15s, border-color .15s;
}
.icon-btn:hover { color: var(--fg); border-color: var(--border-strong); }
.icon-btn .i-moon { display: none; }
:root[data-theme="dark"] .icon-btn .i-sun { display: none; }
:root[data-theme="dark"] .icon-btn .i-moon { display: block; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .icon-btn .i-sun { display: none; }
  :root:not([data-theme="light"]) .icon-btn .i-moon { display: block; }
}

/* ---------- Hero ---------- */
.hero { padding: 32px 0 24px; }
@media (min-width: 768px) { .hero { padding: 48px 0 32px; } }
.breadcrumb { display: flex; gap: 8px; font-size: 14px; color: var(--fg-subtle); margin-bottom: 12px; }
.breadcrumb a { color: var(--fg-subtle); text-decoration: none; }
.breadcrumb a:hover { color: var(--secondary); text-decoration: underline; }
.hero h1 { font-size: clamp(1.9rem, 4.5vw, 3rem); font-weight: 800; letter-spacing: -0.03em; }
.hero .hl { color: var(--accent); }
.lead { max-width: 68ch; margin: 12px 0 0; color: var(--fg-muted); font-size: 1.0625rem; }

/* ---------- Workspace ---------- */
.workspace { display: grid; gap: 20px; align-items: start; padding-bottom: 48px; }
@media (min-width: 1024px) {
  .workspace { grid-template-columns: minmax(0, 1fr) minmax(0, 440px); gap: 24px; }
  .result-col { position: sticky; top: 80px; }
}
.result-col { display: grid; gap: 20px; min-width: 0; }

.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); box-shadow: var(--shadow);
  padding: 20px;
}
@media (min-width: 768px) { .card { padding: 24px; } }
.card-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 16px; min-height: 36px; }
.card-head h2 { font-size: 1.125rem; font-weight: 700; display: flex; align-items: center; gap: 8px; }
.head-actions { display: flex; gap: 4px; }
.count {
  font-size: 12px; font-weight: 600; min-width: 22px; height: 22px; padding: 0 6px;
  display: inline-grid; place-items: center; border-radius: 999px;
  background: var(--surface-2); color: var(--fg-muted); font-variant-numeric: tabular-nums;
}

/* ---------- Form ---------- */
.field { margin-bottom: 18px; min-width: 0; }
.field label {
  display: flex; flex-wrap: wrap; align-items: baseline; gap: 6px;
  font-weight: 600; font-size: 15px; margin-bottom: 6px;
}
.field label code {
  font-weight: 400; font-size: 12px; color: var(--fg-subtle);
  background: var(--code-bg); padding: 1px 6px; border-radius: 4px;
}
.req { color: var(--danger); }
input[type="text"], input[type="url"], select {
  width: 100%; min-height: 46px; padding: 10px 14px;
  background: var(--surface); border: 1px solid var(--border-strong); border-radius: var(--radius-sm);
  font-size: 16px; transition: border-color .15s, box-shadow .15s;
}
input::placeholder { color: var(--fg-subtle); opacity: .8; }
input:hover, select:hover { border-color: var(--fg-subtle); }
input:focus, select:focus { outline: none; border-color: var(--ring); box-shadow: 0 0 0 3px color-mix(in srgb, var(--ring) 25%, transparent); }
input[aria-invalid="true"] { border-color: var(--danger); }
input[aria-invalid="true"]:focus { box-shadow: 0 0 0 3px color-mix(in srgb, var(--danger) 25%, transparent); }
.help { margin: 6px 0 0; font-size: 13.5px; color: var(--fg-subtle); line-height: 1.5; }
.error { margin: 6px 0 0; font-size: 13.5px; color: var(--danger); font-weight: 500; }
.error:empty { display: none; }

.grid-2 { display: grid; gap: 0 16px; }
@media (min-width: 640px) { .grid-2 { grid-template-columns: 1fr 1fr; } }

.presets { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin: -4px 0 20px; }
.presets-label { font-size: 13.5px; color: var(--fg-subtle); margin-right: 2px; }
.chip {
  min-height: 36px; padding: 6px 12px; font-size: 13.5px; font-weight: 500;
  border: 1px solid var(--border); background: var(--surface-2); color: var(--fg-muted);
  border-radius: 999px; transition: color .15s, border-color .15s, background-color .15s, transform .1s;
}
.chip:hover { color: var(--fg); border-color: var(--border-strong); }
.chip:active { transform: scale(.97); }
.chip[aria-pressed="true"] { background: var(--info-bg); border-color: var(--secondary); color: var(--secondary); }
@media (pointer: coarse) { .chip { min-height: 44px; } }

details > summary { list-style: none; cursor: pointer; }
details > summary::-webkit-details-marker { display: none; }
details > summary svg { transition: transform .2s var(--ease); }
details[open] > summary svg { transform: rotate(90deg); }

.advanced { border-top: 1px dashed var(--border-strong); padding-top: 4px; margin-bottom: 8px; }
.advanced > summary {
  display: inline-flex; align-items: center; gap: 6px; min-height: 44px;
  font-weight: 600; font-size: 15px; color: var(--fg-muted);
}
.advanced > summary:hover { color: var(--fg); }
.advanced[open] > summary { margin-bottom: 8px; }

.options {
  border: 0; margin: 8px 0 0; padding: 16px; border-radius: var(--radius);
  background: var(--surface-2); display: flex; flex-wrap: wrap; align-items: center; gap: 12px 24px;
}
.options legend { float: left; width: 100%; padding: 0; font-weight: 600; font-size: 14px; color: var(--fg-muted); margin-bottom: 4px; }
.switch { display: inline-flex; align-items: center; gap: 10px; font-size: 15px; cursor: pointer; min-height: 44px; }
.switch input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.switch .track {
  position: relative; width: 40px; height: 24px; border-radius: 999px;
  background: var(--border-strong); transition: background-color .2s var(--ease); flex: none;
}
.switch .track::after {
  content: ""; position: absolute; top: 3px; left: 3px; width: 18px; height: 18px; border-radius: 50%;
  background: #fff; box-shadow: var(--shadow-sm); transition: transform .2s var(--ease);
}
.switch input:checked + .track { background: var(--accent); }
.switch input:checked + .track::after { transform: translateX(16px); }
.switch input:focus-visible + .track { outline: 3px solid var(--ring); outline-offset: 2px; }
.select-wrap { display: inline-flex; align-items: center; gap: 10px; font-size: 15px; }
.select-wrap select { width: auto; min-height: 40px; padding: 6px 10px; }

/* ---------- Result ---------- */
.output {
  min-height: 112px; border-radius: var(--radius); padding: 16px;
  background: var(--code-bg); border: 1px solid var(--border);
  display: flex; align-items: center;
}
.output.has-url { border-color: color-mix(in srgb, var(--accent) 45%, var(--border)); }
.empty { margin: 0; color: var(--fg-subtle); font-size: 14.5px; display: flex; gap: 10px; align-items: flex-start; }
.empty.small { font-size: 13.5px; }
.url-out {
  display: block; width: 100%; font-size: 14px; line-height: 1.65;
  word-break: break-all; overflow-wrap: anywhere; color: var(--fg);
}
.url-out .u-base { color: var(--fg-muted); }
.url-out .u-key { color: var(--secondary); }
.url-out .u-val { color: var(--accent); font-weight: 500; }
.url-out .u-sep { color: var(--fg-subtle); }

.channel {
  display: inline-flex; align-items: center; gap: 6px; font-size: 12.5px; font-weight: 600;
  padding: 4px 10px; border-radius: 999px; white-space: nowrap;
  background: var(--info-bg); color: var(--secondary);
}
.channel svg { width: 14px; height: 14px; }
.channel.is-unassigned { background: var(--warn-bg); color: var(--warn); }

.warnings { list-style: none; margin: 12px 0 0; padding: 0; display: grid; gap: 8px; }
.warnings:empty { display: none; }
.warnings li {
  display: flex; gap: 8px; font-size: 13.5px; line-height: 1.5;
  padding: 10px 12px; border-radius: var(--radius-sm);
  background: var(--warn-bg); color: var(--fg);
}
.warnings li svg { color: var(--warn); width: 16px; height: 16px; margin-top: 2px; }

.actions { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-top: 16px; }
.actions .btn-primary { grid-column: 1 / -1; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 46px; padding: 10px 18px; border-radius: var(--radius-sm);
  font-weight: 600; font-size: 15px; text-decoration: none; border: 1px solid transparent;
  transition: background-color .15s, border-color .15s, color .15s, transform .1s, opacity .15s;
  touch-action: manipulation;
}
.btn:active:not(:disabled) { transform: scale(.98); }
.btn:disabled, .btn[aria-disabled="true"] { opacity: .45; cursor: not-allowed; pointer-events: none; }
.btn-primary { background: var(--accent); color: var(--on-accent); }
.btn-primary:hover { background: var(--accent-hover); }
.btn-primary.is-done { background: var(--primary); color: var(--on-primary); }
.btn-secondary { background: var(--surface); border-color: var(--border-strong); color: var(--fg); }
.btn-secondary:hover { border-color: var(--fg-subtle); background: var(--surface-2); }
.btn-ghost { background: transparent; color: var(--fg-muted); }
.btn-ghost:hover { color: var(--fg); background: var(--surface-2); }
.btn-sm { min-height: 36px; padding: 6px 10px; font-size: 13.5px; font-weight: 500; }
.btn-sm svg { width: 16px; height: 16px; }
.btn-danger:hover { color: var(--danger); background: var(--danger-bg); }
@media (pointer: coarse) { .btn-sm { min-height: 44px; } }

.qr-box {
  margin-top: 16px; padding: 16px; border-radius: var(--radius);
  border: 1px solid var(--border); display: flex; flex-direction: column; align-items: center; gap: 12px;
}
.qr-canvas { background: #fff; padding: 12px; border-radius: var(--radius-sm); line-height: 0; }
.qr-canvas canvas, .qr-canvas img { width: 200px; height: 200px; image-rendering: pixelated; }

.breakdown { margin-top: 16px; }
.breakdown > summary { display: inline-flex; align-items: center; gap: 6px; font-size: 14px; font-weight: 600; color: var(--fg-muted); min-height: 36px; }
.breakdown table { width: 100%; border-collapse: collapse; margin-top: 8px; font-size: 13.5px; table-layout: fixed; }
.breakdown td { padding: 8px 0; border-top: 1px solid var(--border); vertical-align: top; overflow-wrap: anywhere; }
.breakdown td:first-child { width: 42%; padding-right: 8px; }
.breakdown td:first-child code { color: var(--secondary); }
.breakdown td:last-child { font-family: var(--mono); font-size: 13px; }

/* ---------- History ---------- */
.history { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; max-height: 360px; overflow-y: auto; }
.history li {
  display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 4px 8px; align-items: center;
  padding: 10px 12px; border-radius: var(--radius-sm); border: 1px solid var(--border);
  animation: slideIn .25s var(--ease);
}
.history .h-meta { font-size: 13px; color: var(--fg-muted); display: flex; gap: 6px; flex-wrap: wrap; min-width: 0; }
.history .h-meta b { color: var(--fg); font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 100%; }
.history .h-url {
  grid-column: 1 / -1; font-family: var(--mono); font-size: 12px; color: var(--fg-subtle);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.history .h-actions { display: flex; gap: 2px; }
.history .h-actions button {
  display: grid; place-items: center; width: 36px; height: 36px; border: 0; border-radius: 6px;
  background: transparent; color: var(--fg-subtle); transition: color .15s, background-color .15s;
}
.history .h-actions button:hover { color: var(--fg); background: var(--surface-2); }
.history .h-actions button.del:hover { color: var(--danger); background: var(--danger-bg); }
.history .h-actions svg { width: 16px; height: 16px; }
@media (pointer: coarse) { .history .h-actions button { width: 44px; height: 44px; } }
.history-card .empty:not([hidden]) + .history { display: none; }

@keyframes slideIn { from { opacity: 0; transform: translateY(-4px); } to { opacity: 1; transform: none; } }

/* ---------- Content ---------- */
.content { max-width: 820px; padding-top: 16px; padding-bottom: 64px; }
.content section { padding: 32px 0; border-top: 1px solid var(--border); }
.content h2 { font-size: clamp(1.35rem, 2.6vw, 1.6rem); font-weight: 700; margin-bottom: 14px; }
.content p { margin: 0 0 14px; color: var(--fg-muted); }
.content p strong, .content li strong { color: var(--fg); }
.content code { background: var(--code-bg); padding: 1px 6px; border-radius: 4px; color: var(--fg); overflow-wrap: anywhere; }
.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); }
.param-table { width: 100%; border-collapse: collapse; font-size: 14.5px; }
.param-table th, .param-table td { text-align: left; padding: 12px 14px; border-bottom: 1px solid var(--border); vertical-align: top; }
.param-table th { font-weight: 600; background: var(--surface-2); font-size: 13.5px; color: var(--fg-muted); white-space: nowrap; }
.param-table tr:last-child td { border-bottom: 0; }
.param-table td { color: var(--fg-muted); }
.param-table td:first-child { color: var(--fg); white-space: nowrap; }

.rules { margin: 0; padding-left: 22px; display: grid; gap: 10px; color: var(--fg-muted); }
.rules li::marker { color: var(--accent); font-weight: 700; }

.faq { display: grid; gap: 8px; }
.faq details { border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); }
.faq summary {
  display: flex; justify-content: space-between; align-items: center; gap: 12px;
  padding: 14px 16px; min-height: 52px; font-weight: 600;
}
.faq summary::after {
  content: ""; width: 10px; height: 10px; flex: none; margin-right: 4px;
  border-right: 2px solid var(--fg-subtle); border-bottom: 2px solid var(--fg-subtle);
  transform: rotate(45deg) translateY(-3px); transition: transform .2s var(--ease);
}
.faq details[open] summary::after { transform: rotate(-135deg) translateY(-3px); }
.faq details p { padding: 0 16px 16px; margin: 0; }

/* ---------- Footer & toast ---------- */
.site-footer { border-top: 1px solid var(--border); padding: 24px 0; font-size: 14px; color: var(--fg-subtle); }
.site-footer p { margin: 0; }
.site-footer a { color: var(--fg-muted); }

.toast {
  position: fixed; left: 50%; bottom: 24px; z-index: 50;
  transform: translate(-50%, 16px); opacity: 0; pointer-events: none;
  background: var(--fg); color: var(--bg); font-weight: 500; font-size: 14.5px;
  padding: 12px 18px; border-radius: var(--radius-sm); box-shadow: var(--shadow);
  transition: opacity .2s var(--ease), transform .2s var(--ease);
  max-width: calc(100vw - 32px);
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

.mobile-bar {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 30;
  display: grid; grid-template-columns: auto 1fr; gap: 8px;
  padding: 12px 16px calc(12px + env(safe-area-inset-bottom));
  background: var(--surface); border-top: 1px solid var(--border);
  box-shadow: 0 -8px 24px -12px rgba(15, 23, 42, .2);
  animation: barIn .2s var(--ease);
}
@media (min-width: 1024px) { .mobile-bar { display: none !important; } }
body.has-bar { padding-bottom: 80px; }
body.has-bar .toast { bottom: 88px; }
@keyframes barIn { from { transform: translateY(100%); } to { transform: none; } }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
}