@import url('/shared/fonts.css');

/* ── RESET ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: 'DM Sans', sans-serif;
  background: #f7f6f2;
  color: #1a1a1a;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
main { flex: 1; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; }
input, select, textarea { font-family: inherit; }

/* ── TOKENS ── */
:root {
  --bg:        #f7f6f2;
  --bg-card:   #ffffff;
  --bg-muted:  #f0efe9;
  --border:    #e2e0d6;
  --border-strong: #c8c5b5;
  --text:      #1a1a1a;
  --text-muted:#6b6960;
  --text-hint: #9e9b8e;
  --accent:    #d4f044;
  --accent-dark:#b8d420;
  --accent-text:#1a1a1a;
  --success:   #2d9e6b;
  --success-bg:#edf7f3;
  --warning:   #c47c00;
  --warning-bg:#fef6e4;
  --danger:    #c0392b;
  --danger-bg: #fdecea;
  --info:      #1a6fa8;
  --info-bg:   #e8f3fb;
  --radius-sm: 4px;
  --radius:    8px;
  --radius-lg: 14px;
  --shadow:    0 1px 3px rgba(0,0,0,0.07), 0 1px 2px rgba(0,0,0,0.04);
  --font-mono: 'DM Mono', monospace;
  --nav-h:     56px;
}

/* ── NAV ── */
.site-nav {
  height: var(--nav-h);
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 28px;
  position: sticky;
  top: 0;
  z-index: 100;
}
.site-nav__logo {
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 7px;
  color: var(--text);
}
.site-nav__logo-dot {
  width: 8px; height: 8px;
  background: var(--accent);
  border-radius: 50%;
  display: inline-block;
}
.site-nav__tool {
  font-size: 13px;
  color: var(--text-muted);
  background: var(--bg-muted);
  padding: 4px 12px;
  border-radius: 99px;
  font-family: var(--font-mono);
}
.site-nav__links {
  display: flex;
  align-items: center;
  gap: 20px;
}
.site-nav__links a {
  font-size: 13px;
  color: var(--text-muted);
  transition: color .15s;
}
.site-nav__links a:hover { color: var(--text); }

/* ── PAGE HEADER ── */
.page-header {
  padding: 44px 28px 32px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-card);
}
.page-header__tag {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-hint);
  text-transform: uppercase;
  letter-spacing: .08em;
  margin-bottom: 10px;
}
.page-header__title {
  font-size: 32px;
  font-weight: 500;
  letter-spacing: -.02em;
  line-height: 1.15;
  margin-bottom: 8px;
}
.page-header__desc {
  font-size: 15px;
  color: var(--text-muted);
  max-width: 520px;
  line-height: 1.6;
}

/* ── CARD ── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow);
}
.card--flat {
  box-shadow: none;
}

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

.label {
  display: block;
  font-size: 12px;
  font-weight: 500;
  color: var(--text-muted);
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: .06em;
  margin-bottom: 7px;
}

.input {
  width: 100%;
  padding: 10px 13px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 15px;
  color: var(--text);
  background: var(--bg);
  transition: border-color .15s, box-shadow .15s;
  outline: none;
  appearance: none;
}
.input:focus {
  border-color: var(--text);
  box-shadow: 0 0 0 3px rgba(26,26,26,.07);
}
.input::placeholder { color: var(--text-hint); }

select.input {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%236b6960' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
  cursor: pointer;
}

textarea.input { resize: vertical; min-height: 100px; line-height: 1.55; }

/* Range slider */
.range-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
}
input[type=range] {
  flex: 1;
  height: 4px;
  -webkit-appearance: none;
  appearance: none;
  background: var(--border);
  border-radius: 99px;
  outline: none;
  cursor: pointer;
}
input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px; height: 18px;
  border-radius: 50%;
  background: var(--text);
  border: 2px solid var(--bg-card);
  box-shadow: 0 0 0 1px var(--border-strong);
  transition: transform .12s;
}
input[type=range]::-webkit-slider-thumb:hover { transform: scale(1.15); }
.range-val {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text);
  min-width: 44px;
  text-align: right;
}

/* Toggle (metric/imperial) */
.toggle-group {
  display: inline-flex;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-muted);
}
.toggle-group button {
  padding: 7px 18px;
  font-size: 13px;
  font-weight: 400;
  background: transparent;
  border: none;
  color: var(--text-muted);
  transition: all .15s;
}
.toggle-group button.active {
  background: var(--bg-card);
  color: var(--text);
  font-weight: 500;
  box-shadow: var(--shadow);
  margin: 2px;
  border-radius: calc(var(--radius) - 2px);
}

/* ── BUTTONS ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 10px 22px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 500;
  border: 1px solid transparent;
  transition: all .15s;
  white-space: nowrap;
}
.btn:active { transform: scale(.98); }

.btn-primary {
  background: var(--text);
  color: var(--bg);
  border-color: var(--text);
}
.btn-primary:hover { background: #333; }

.btn-accent {
  background: var(--accent);
  color: var(--accent-text);
  border-color: var(--accent);
}
.btn-accent:hover { background: var(--accent-dark); border-color: var(--accent-dark); }

.btn-outline {
  background: transparent;
  color: var(--text);
  border-color: var(--border-strong);
}
.btn-outline:hover { border-color: var(--text); background: var(--bg-muted); }

.btn-sm { padding: 6px 14px; font-size: 13px; }
.btn-lg { padding: 13px 28px; font-size: 15px; }
.btn-full { width: 100%; }
.btn:disabled { opacity: .4; cursor: default; pointer-events: none; }

/* ── BADGES / STATUS ── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 10px;
  border-radius: 99px;
  font-size: 12px;
  font-weight: 500;
  font-family: var(--font-mono);
}
.badge-success { background: var(--success-bg); color: var(--success); }
.badge-warning { background: var(--warning-bg); color: var(--warning); }
.badge-danger  { background: var(--danger-bg);  color: var(--danger);  }
.badge-info    { background: var(--info-bg);     color: var(--info);    }
.badge-neutral { background: var(--bg-muted);    color: var(--text-muted); }

/* ── STAT CARDS ── */
.stat-card {
  background: var(--bg-muted);
  border-radius: var(--radius);
  padding: 14px 16px;
}
.stat-card__label {
  font-size: 11px;
  color: var(--text-hint);
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: .06em;
  margin-bottom: 4px;
}
.stat-card__value {
  font-size: 24px;
  font-weight: 500;
  letter-spacing: -.02em;
  color: var(--text);
  line-height: 1.2;
}
.stat-card__sub {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 2px;
}

/* ── DIVIDER ── */
.divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 24px 0;
}

/* ── ALERT ── */
.alert {
  padding: 12px 16px;
  border-radius: var(--radius);
  font-size: 14px;
  line-height: 1.5;
  border: 1px solid transparent;
}
.alert-success { background: var(--success-bg); color: var(--success); border-color: #b6e6d2; }
.alert-warning { background: var(--warning-bg); color: var(--warning); border-color: #f5d98a; }
.alert-danger  { background: var(--danger-bg);  color: var(--danger);  border-color: #f5b8b2; }
.alert-info    { background: var(--info-bg);     color: var(--info);    border-color: #a8d4f0; }

/* ── COPY BUTTON ── */
.copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 12px;
  color: var(--text-muted);
  background: var(--bg-muted);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 4px 10px;
  cursor: pointer;
  transition: all .15s;
}
.copy-btn:hover { color: var(--text); border-color: var(--border-strong); }
.copy-btn.copied { color: var(--success); border-color: var(--success); background: var(--success-bg); }

/* ── FOOTER ── */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: auto;
}
.site-footer__left {
  font-size: 12px;
  color: var(--text-hint);
  font-family: var(--font-mono);
}
.site-footer__links {
  display: flex;
  gap: 20px;
}
.site-footer__links a {
  font-size: 12px;
  color: var(--text-hint);
  transition: color .15s;
}
.site-footer__links a:hover { color: var(--text-muted); }

/* ── UTILITIES ── */
.text-muted  { color: var(--text-muted); }
.text-hint   { color: var(--text-hint); }
.text-mono   { font-family: var(--font-mono); }
.text-sm     { font-size: 13px; }
.text-xs     { font-size: 11px; }
.text-center { text-align: center; }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mt-4 { margin-top: 32px; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.gap-1 { gap: 8px; }
.gap-2 { gap: 16px; }
.flex { display: flex; }
.flex-col { display: flex; flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.w-full { width: 100%; }

/* ── RESPONSIVE ── */
@media (max-width: 640px) {
  .site-nav { padding: 0 16px; }
  .site-nav__tool { display: none; }
  .page-header { padding: 28px 16px 24px; }
  .page-header__title { font-size: 24px; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .site-footer { padding: 20px 16px; flex-direction: column; align-items: flex-start; }
}