/* ==========================================================
   Toolbench – shared design system (base.css)
   Modern, cohesive theme linked by the hub and every tool.
   ========================================================== */

:root {
  /* Surfaces */
  --bg: #eef1f8;
  --card: #ffffff;
  --field: #f7f9fc;

  /* Brand */
  --primary: #0d9488;
  --primary-2: #10b981;
  --primary-dark: #0f766e;
  --primary-soft: #e7f6f3;
  --grad: linear-gradient(135deg, #0d9488 0%, #10b981 100%);

  /* Ink */
  --text: #0f172a;
  --muted: #64748b;
  --border: #e7eaf1;
  --ring: rgba(13, 148, 136, 0.20);

  /* Status */
  --good: #059669;
  --warn: #d97706;
  --bad: #dc2626;

  /* Shape & depth */
  --radius: 18px;
  --radius-sm: 12px;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.04), 0 2px 6px rgba(15, 23, 42, 0.05);
  --shadow: 0 8px 28px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 22px 48px rgba(13, 148, 136, 0.20);

  /* Type */
  --font: "Inter", "Segoe UI", system-ui, -apple-system, "Helvetica Neue", sans-serif;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;

  /* Semantic, theme-aware surfaces */
  --elevate: #ffffff;
  --seg-bg: #eef1f6;
  --prefix-bg: rgba(15, 23, 42, 0.03);
  --total-bg: linear-gradient(135deg, var(--primary-soft), #eafaf4);
  --total-border: #d6efe9;
  --note-bg: #fffaf0;
  --note-border: #f5e2b8;
  --note-text: #8a6d1e;
  --glass: rgba(255, 255, 255, 0.85);
  --dot: rgba(15, 23, 42, 0.045);
}

/* ---------- Dark theme ---------- */
:root[data-theme="dark"] {
  --bg: #0b1120;
  --card: #141c2e;
  --field: #0f1728;
  --elevate: #1c273d;
  --text: #e6ebf5;
  --muted: #9aa7bd;
  --border: #263248;
  --primary: #2dd4bf;
  --primary-2: #34d399;
  --primary-dark: #5eead4;
  --primary-soft: #10251f;
  --ring: rgba(45, 212, 191, 0.30);
  --grad: linear-gradient(135deg, #14b8a6, #34d399);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow: 0 12px 34px rgba(0, 0, 0, 0.55);
  --shadow-lg: 0 24px 50px rgba(0, 0, 0, 0.62);
  --seg-bg: #0f1728;
  --prefix-bg: rgba(255, 255, 255, 0.05);
  --total-bg: linear-gradient(135deg, #12312b, #0f231e);
  --total-border: #1e4b42;
  --note-bg: #2a2410;
  --note-border: #4d4320;
  --note-text: #eacb83;
  --glass: rgba(18, 26, 44, 0.78);
  --dot: rgba(255, 255, 255, 0.05);
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  color: var(--text);
  background: 
    radial-gradient(1100px 620px at 100% -8%, rgba(13, 148, 136, 0.22), transparent 55%),
    radial-gradient(1000px 640px at -8% 8%, rgba(99, 102, 241, 0.16), transparent 55%),
    radial-gradient(820px 520px at 55% 118%, rgba(244, 114, 182, 0.12), transparent 55%),
    linear-gradient(180deg, #eef2fb 0%, #eaf1f6 100%);
  background-attachment: fixed;
  display: flex;
  flex-direction: column;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

/* Subtle dotted texture behind everything for a modern feel */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image: radial-gradient(var(--dot) 1px, transparent 1px);
  background-size: 22px 22px;
  pointer-events: none;
}

a { color: var(--primary); }

/* Dark background aurora */
:root[data-theme="dark"] body {
  background: 
    radial-gradient(1100px 620px at 100% -8%, rgba(20, 184, 166, 0.18), transparent 55%),
    radial-gradient(1000px 640px at -8% 8%, rgba(99, 102, 241, 0.16), transparent 55%),
    radial-gradient(820px 520px at 55% 118%, rgba(244, 114, 182, 0.10), transparent 55%),
    linear-gradient(180deg, #0b1120 0%, #0a0f1c 100%);
  background-attachment: fixed;
}

::selection { background: rgba(13, 148, 136, 0.18); }

/* Modern scrollbar */
* { scrollbar-width: thin; scrollbar-color: #cbd5e1 transparent; }
*::-webkit-scrollbar { width: 10px; height: 10px; }
*::-webkit-scrollbar-thumb { background: #cbd5e1; border-radius: 999px; border: 3px solid transparent; background-clip: content-box; }
*::-webkit-scrollbar-thumb:hover { background: #94a3b8; background-clip: content-box; }

/* ---------- Header ---------- */
.site-header { text-align: center; padding: 34px 20px 8px; }

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text);
}

.brand-mark {
  width: 42px;
  height: 42px;
  border-radius: 13px;
  background: var(--grad);
  color: #fff;
  font-weight: 800;
  font-size: 1.35rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 20px rgba(13, 148, 136, 0.35);
}

.brand-name {
  font-size: 1.6rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.site-tagline { margin: 10px 0 0; color: var(--muted); font-size: 0.95rem; }

/* ---------- Layout ---------- */
.container {
  flex: 1;
  width: 100%;
  max-width: 580px;
  margin: 0 auto;
  padding: 20px 20px 48px;
}
.container.wide { max-width: 1040px; }

/* ---------- Back link ---------- */
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin: 4px 0 16px;
  color: var(--muted);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9rem;
  padding: 6px 12px 6px 8px;
  border-radius: 999px;
  background: var(--glass);
  border: 1px solid var(--border);
  transition: color 0.15s, border-color 0.15s, transform 0.15s;
}
.back-link:hover { color: var(--primary); border-color: var(--primary); transform: translateX(-2px); }

/* ---------- Card ---------- */
@keyframes tb-rise { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px;
  box-shadow: var(--shadow);
  animation: tb-rise 0.45s cubic-bezier(0.2, 0.7, 0.2, 1) both;
}
.card + .card { margin-top: 16px; }

.tool-heading {
  margin: 0 0 6px;
  font-size: 1.6rem;
  font-weight: 800;
  letter-spacing: -0.025em;
}
.tool-sub { margin: 0 0 22px; color: var(--muted); font-size: 0.92rem; }

/* ---------- Fields ---------- */
.field { margin-bottom: 18px; }
.field:last-child { margin-bottom: 0; }

label {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: 8px;
}

input[type="number"],
input[type="text"],
input[type="email"],
input[type="tel"],
input[type="url"],
input[type="date"],
input[type="datetime-local"],
input[type="time"],
input[type="search"],
select,
textarea {
  width: 100%;
  padding: 13px 15px;
  font-size: 1.02rem;
  font-family: inherit;
  color: var(--text);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--field);
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s, background 0.15s;
}
textarea { resize: vertical; min-height: 120px; line-height: 1.5; }

input:focus, select:focus, textarea:focus {
  border-color: var(--primary);
  background: var(--elevate);
  box-shadow: 0 0 0 4px var(--ring);
}
::placeholder { color: #9aa5b5; }

.input-group {
  display: flex;
  align-items: center;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: border-color 0.15s, box-shadow 0.15s, background 0.15s;
  background: var(--field);
}
.input-group:focus-within {
  border-color: var(--primary);
  background: var(--elevate);
  box-shadow: 0 0 0 4px var(--ring);
}
.input-prefix, .input-suffix {
  font-size: 1rem;
  font-weight: 700;
  color: var(--muted);
  background: var(--prefix-bg);
  align-self: stretch;
  display: flex;
  align-items: center;
  white-space: nowrap;
  padding: 0 14px;
}
.input-group input {
  flex: 1;
  border: none;
  outline: none;
  padding: 13px 15px;
  font-size: 1.05rem;
  font-family: inherit;
  color: var(--text);
  width: 100%;
  background: transparent;
}
.input-group input:focus { box-shadow: none; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: none;
  cursor: pointer;
  font-family: inherit;
  font-size: 1rem;
  font-weight: 700;
  padding: 13px 20px;
  border-radius: var(--radius-sm);
  background: var(--grad);
  color: #fff;
  transition: transform 0.12s, box-shadow 0.18s, filter 0.15s;
  box-shadow: 0 8px 20px rgba(13, 148, 136, 0.30);
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 12px 26px rgba(13, 148, 136, 0.38); filter: saturate(1.08); }
.btn:active { transform: translateY(0); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; box-shadow: none; transform: none; }
.btn.full { width: 100%; }
.btn.ghost {
  background: var(--elevate);
  color: var(--primary-dark);
  border: 1.5px solid var(--border);
  box-shadow: none;
}
.btn.ghost:hover { border-color: var(--primary); background: var(--primary-soft); transform: translateY(-1px); }
.btn.small { padding: 9px 14px; font-size: 0.85rem; border-radius: 10px; }

.btn-row { display: flex; gap: 10px; flex-wrap: wrap; }

/* ---------- Mode toggle (segmented control) ---------- */
.mode-toggle {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 1fr;
  gap: 4px;
  background: var(--seg-bg);
  padding: 5px;
  border-radius: 14px;
  margin-bottom: 22px;
}
.mode-btn {
  background: transparent;
  padding: 10px;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--muted);
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.18s;
  font-family: inherit;
  border: none;
}
.mode-btn:hover { color: var(--text); }
.mode-btn.active {
  background: var(--elevate);
  color: var(--primary-dark);
  box-shadow: 0 2px 8px rgba(15, 23, 42, 0.10);
}

/* ---------- Presets ---------- */
.presets { display: flex; gap: 8px; margin-top: 10px; flex-wrap: wrap; }
.preset {
  flex: 1;
  min-width: 56px;
  border: 1.5px solid var(--border);
  background: var(--elevate);
  color: var(--text);
  padding: 8px 0;
  border-radius: 10px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  transition: all 0.15s;
}
.preset:hover { border-color: var(--primary); color: var(--primary); }
.preset.active { background: var(--grad); border-color: transparent; color: #fff; box-shadow: 0 4px 12px rgba(13, 148, 136, 0.3); }

/* ---------- Results ---------- */
.results {
  margin-top: 24px;
  border-top: 1px solid var(--border);
  padding-top: 12px;
}
.result-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 10px 0;
}
.result-label { font-size: 0.95rem; color: var(--muted); }
.result-label em { font-style: normal; opacity: 0.7; }
.result-value {
  font-size: 1.05rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  text-align: right;
}
.result-row.total {
  margin-top: 10px;
  padding: 16px 18px;
  background: var(--total-bg);
  border: 1px solid var(--total-border);
  border-radius: 14px;
}
.result-row.total .result-label { color: var(--text); font-weight: 700; }
.result-row.total .result-value { font-size: 1.5rem; color: var(--primary-dark); letter-spacing: -0.01em; }
.result-value.good { color: var(--good); }
.result-value.warn { color: var(--warn); }
.result-value.bad { color: var(--bad); }

.hint { margin: 16px 0 0; font-size: 0.82rem; color: var(--muted); }
.hint.note {
  background: var(--note-bg);
  border: 1px solid var(--note-border);
  color: var(--note-text);
  padding: 11px 13px;
  border-radius: 12px;
}

/* ---------- Grid helpers ---------- */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
@media (max-width: 460px) { .grid-2 { grid-template-columns: 1fr; } }

/* ---------- Footer ---------- */
.site-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  max-width: 580px;
  width: 100%;
  margin: 0 auto;
  padding: 18px 24px 34px;
  font-size: 0.82rem;
  color: var(--muted);
}
.site-footer.wide { max-width: 1040px; }
.visitors strong { color: var(--text); }

/* ---------- Utilities ---------- */
.hidden { display: none !important; }
.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0);
  white-space: nowrap; border: 0;
}
.mono { font-family: "SFMono-Regular", ui-monospace, Consolas, "Liberation Mono", monospace; }
.center { text-align: center; }
.muted { color: var(--muted); }
.pill {
  display: inline-block;
  padding: 4px 11px;
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--primary-dark);
  font-size: 0.78rem;
  font-weight: 700;
}

/* ---------- Copy toast (from base.js) ---------- */
.tb-toast {
  position: fixed;
  left: 50%;
  bottom: 26px;
  transform: translateX(-50%) translateY(20px);
  background: #0f172a;
  color: #fff;
  padding: 11px 18px;
  border-radius: 999px;
  font-size: 0.88rem;
  font-weight: 600;
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.3);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s, transform 0.2s;
  z-index: 9999;
}
.tb-toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; scroll-behavior: auto !important; }
}

/* ---------- Floating controls (theme toggle + contact), injected by base.js ---------- */
.tb-controls {
  position: fixed;
  right: 18px;
  bottom: 18px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  z-index: 9998;
}
.tb-fab {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  font-size: 1.15rem;
  line-height: 1;
  cursor: pointer;
  box-shadow: var(--shadow);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.15s, box-shadow 0.15s;
}
.tb-fab:hover { transform: translateY(-2px) scale(1.06); box-shadow: var(--shadow-lg); }
.tb-fab.tb-feedback { background: var(--grad); border-color: transparent; color: #fff; }

/* ---------- Feedback modal ---------- */
.tb-modal {
  position: fixed;
  inset: 0;
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.tb-modal[hidden] { display: none; }
.tb-modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(8, 12, 22, 0.55);
  backdrop-filter: blur(3px);
  -webkit-backdrop-filter: blur(3px);
  opacity: 0;
  transition: opacity 0.2s;
}
.tb-modal.show .tb-modal-backdrop { opacity: 1; }
.tb-modal-card {
  position: relative;
  width: 100%;
  max-width: 420px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px 24px 24px;
  box-shadow: var(--shadow-lg);
  transform: translateY(14px) scale(0.98);
  opacity: 0;
  transition: transform 0.22s cubic-bezier(0.2, 0.7, 0.2, 1), opacity 0.22s;
}
.tb-modal.show .tb-modal-card { transform: none; opacity: 1; }
.tb-modal-close {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: none;
  background: var(--field);
  color: var(--muted);
  cursor: pointer;
  font-size: 0.9rem;
  transition: color 0.15s, background 0.15s;
}
.tb-modal-close:hover { color: var(--text); background: var(--border); }
.tb-modal-title { margin: 0 0 4px; font-size: 1.3rem; font-weight: 800; letter-spacing: -0.02em; }
.tb-modal-sub { margin: 0 0 18px; color: var(--muted); font-size: 0.88rem; }
.tb-form { display: flex; flex-direction: column; gap: 10px; }
.tb-form .btn { margin-top: 4px; }
.tb-form-status { margin: 4px 0 0; font-size: 0.85rem; font-weight: 600; min-height: 1.1em; text-align: center; }
.tb-form-status.ok { color: var(--good); }
.tb-form-status.err { color: var(--bad); }