/* ─────────────────────────────────────────
   RealUtil — Shared Design System
   ───────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800;900&display=swap');

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

:root {
  --accent:       oklch(57% 0.22 262);
  --accent-dim:   oklch(57% 0.22 262 / 0.09);
  --accent-hover: oklch(52% 0.24 262);
  --border:       oklch(91% 0.006 250);
  --border-sub:   oklch(94.5% 0.004 250);
  --text:         oklch(13% 0.014 255);
  --text-2:       oklch(46% 0.013 255);
  --bg:           oklch(98.5% 0.005 255);
  --bg-2:         oklch(96% 0.007 255);
  --card:         oklch(100% 0 0);
  --radius:       10px;
  --radius-sm:    7px;
  --radius-xs:    5px;
  --shadow-xs:    0 1px 2px oklch(0% 0 0 / 0.05);
  --shadow-sm:    0 1px 3px oklch(0% 0 0 / 0.07), 0 4px 12px oklch(0% 0 0 / 0.04);
  --shadow-md:    0 2px 8px oklch(0% 0 0 / 0.08), 0 12px 32px oklch(0% 0 0 / 0.07);
  --max-w:        980px;
  --max-w-narrow: 680px;
}

body.dark {
  --border:     oklch(23% 0.013 255);
  --border-sub: oklch(19% 0.01 255);
  --text:       oklch(94% 0.006 255);
  --text-2:     oklch(56% 0.013 255);
  --bg:         oklch(10.5% 0.012 255);
  --bg-2:       oklch(14% 0.012 255);
  --card:       oklch(14.5% 0.012 255);
  --shadow-xs:  0 1px 2px oklch(0% 0 0 / 0.4);
  --shadow-sm:  0 2px 8px oklch(0% 0 0 / 0.3);
  --shadow-md:  0 8px 24px oklch(0% 0 0 / 0.5);
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background 0.2s, color 0.2s;
}

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


/* ═══════════════════════════════════════
   NAV
═══════════════════════════════════════ */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in oklch, var(--card) 80%, transparent);
  backdrop-filter: blur(14px) saturate(1.5);
  -webkit-backdrop-filter: blur(14px) saturate(1.5);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
  padding: 0 1.25rem;
}

.nav-inner.narrow { max-width: var(--max-w-narrow); }

.logo {
  display: flex;
  align-items: center;
  gap: 9px;
  font-weight: 800;
  font-size: 0.9375rem;
  letter-spacing: -0.025em;
  color: var(--text);
  text-decoration: none;
  flex-shrink: 0;
}

.logo-img {
  width: 28px;
  height: 28px;
  display: block;
  flex-shrink: 0;
}

body.dark .logo-img { filter: invert(1) brightness(1.8); }

.nav-right {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.125rem;
}

.nav-links a {
  padding: 0.375rem 0.625rem;
  border-radius: var(--radius-xs);
  color: var(--text-2);
  font-size: 0.84375rem;
  font-weight: 500;
  transition: color 0.13s, background 0.13s;
}

.nav-links a:hover { color: var(--text); background: var(--bg-2); }

.nav-sep {
  width: 1px;
  height: 20px;
  background: var(--border);
  margin: 0 0.375rem;
}

.theme-btn {
  width: 34px;
  height: 34px;
  border-radius: var(--radius-xs);
  border: 1px solid var(--border);
  background: transparent;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.13s;
  color: var(--text-2);
}

.theme-btn:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-dim); }


/* ═══════════════════════════════════════
   HERO
═══════════════════════════════════════ */
.hero {
  max-width: var(--max-w);
  margin: 4.5rem auto 0;
  padding: 0 1.25rem;
  text-align: center;
}

.hero h1 {
  font-size: clamp(2.4rem, 6vw, 3.5rem);
  font-weight: 900;
  letter-spacing: -0.045em;
  line-height: 1.08;
  margin-bottom: 1.1rem;
  text-wrap: balance;
}

.hero p {
  color: var(--text-2);
  font-size: 1.0625rem;
  max-width: 400px;
  margin: 0 auto;
  line-height: 1.65;
  font-weight: 400;
}


/* ═══════════════════════════════════════
   SECTION LABELS
═══════════════════════════════════════ */
.section-label {
  max-width: var(--max-w);
  margin: 3rem auto 0;
  padding: 0 1.25rem;
  font-size: 0.6875rem;
  font-weight: 700;
  color: var(--text-2);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.section-label::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

.all-label { margin-top: 2rem; }
#fav-section { display: none; }
#fav-section.has-favs { display: block; }


/* ═══════════════════════════════════════
   HOMEPAGE GRID + CARDS
═══════════════════════════════════════ */
.grid {
  max-width: var(--max-w);
  margin: 0.875rem auto 0;
  padding: 0 1.25rem;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(275px, 1fr));
  gap: 0.875rem;
}

.cat-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.375rem 1.5rem 1.375rem;
  transition: box-shadow 0.18s, border-color 0.18s, transform 0.18s;
  display: block;
  position: relative;
  box-shadow: var(--shadow-xs);
  text-decoration: none;
  color: inherit;
}

.cat-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.cat-icon {
  width: 58px;
  height: 58px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 0.875rem;
  padding: 2px;
  transition: background 0.18s;
}

.cat-icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
  filter: contrast(1.5);
}

body.dark .cat-icon img { filter: invert(1) brightness(1.8) contrast(1.3); }

.cat-card:hover .cat-icon {
  background: var(--accent-dim);
  border-radius: var(--radius-sm);
}

.cat-name {
  font-weight: 700;
  font-size: 0.9375rem;
  letter-spacing: -0.02em;
  margin-bottom: 0.3rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.cat-desc {
  font-size: 0.8125rem;
  color: var(--text-2);
  margin-bottom: 0.875rem;
  line-height: 1.55;
}

.cat-tools {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
}

.cat-tag {
  font-size: 0.6875rem;
  font-weight: 500;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 99px;
  padding: 0.175rem 0.55rem;
  color: var(--text-2);
  letter-spacing: 0.01em;
  white-space: nowrap;
}

/* Badges */
.badge-live {
  display: inline-flex;
  align-items: center;
  font-size: 0.625rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  background: oklch(91% 0.1 148);
  color: oklch(36% 0.14 148);
  border-radius: 99px;
  padding: 0.13rem 0.525rem;
  line-height: 1.6;
  vertical-align: middle;
}

body.dark .badge-live {
  background: oklch(28% 0.1 148);
  color: oklch(76% 0.14 148);
}

.badge-soon {
  display: inline-flex;
  align-items: center;
  font-size: 0.625rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  background: var(--bg-2);
  color: var(--text-2);
  border-radius: 99px;
  padding: 0.13rem 0.525rem;
  line-height: 1.6;
  vertical-align: middle;
  border: 1px solid var(--border);
}

/* Fav btn */
.fav-btn {
  position: absolute;
  top: 1rem;
  right: 1rem;
  width: 28px;
  height: 28px;
  border-radius: var(--radius-xs);
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text-2);
  cursor: pointer;
  font-size: 0.78rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.13s;
  z-index: 1;
}

.fav-btn:hover {
  border-color: oklch(68% 0.18 80);
  color: oklch(60% 0.18 80);
  background: oklch(96% 0.06 80);
}

.fav-btn.active {
  background: oklch(94% 0.09 80);
  border-color: oklch(68% 0.18 80);
  color: oklch(52% 0.18 80);
}

body.dark .fav-btn.active {
  background: oklch(24% 0.1 80);
  border-color: oklch(62% 0.18 80);
  color: oklch(76% 0.15 80);
}


/* ═══════════════════════════════════════
   AD PLACEHOLDER
═══════════════════════════════════════ */
.ad-placeholder {
  background: var(--bg-2);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  height: 90px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-2);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.ad-top, .ad-mid {
  max-width: var(--max-w);
  margin: 1.25rem auto 0;
  padding: 0 1.25rem;
}


/* ═══════════════════════════════════════
   TOOL CARD WRAPPER
═══════════════════════════════════════ */
.tool {
  max-width: var(--max-w);
  margin: 1.5rem auto 0;
  padding: 0 1.25rem;
}

.tool-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

/* Hero for tool pages */
.tool-hero {
  max-width: var(--max-w);
  margin: 2.25rem auto 0;
  padding: 0 1.25rem;
}

.tool-hero h1 {
  font-size: clamp(1.5rem, 3.5vw, 2rem);
  font-weight: 800;
  letter-spacing: -0.035em;
  line-height: 1.15;
  margin-bottom: 0.4rem;
}

.tool-hero p {
  color: var(--text-2);
  font-size: 0.9375rem;
}

.tool-hero-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.4rem;
}

.tool-hero-top h1 { margin-bottom: 0; }

.tool-fav-btn {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text-2);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.13s;
  font-family: inherit;
}

.tool-fav-btn svg { pointer-events: none; display: block; }

.tool-fav-btn:hover {
  border-color: oklch(68% 0.18 80);
  color: oklch(55% 0.18 80);
  background: oklch(96% 0.06 80);
}

.tool-fav-btn.active {
  background: oklch(94% 0.09 80);
  border-color: oklch(68% 0.18 80);
  color: oklch(52% 0.18 80);
}

body.dark .tool-fav-btn.active {
  background: oklch(24% 0.1 80);
  border-color: oklch(62% 0.18 80);
  color: oklch(76% 0.15 80);
}


/* ═══════════════════════════════════════
   TABS (units)
═══════════════════════════════════════ */
.tabs {
  display: flex;
  border-bottom: 1px solid var(--border);
  overflow-x: auto;
  scrollbar-width: none;
  padding: 0 0.375rem;
  gap: 0.125rem;
}

.tabs::-webkit-scrollbar { display: none; }

.tab {
  padding: 0.9375rem 1rem;
  font-size: 0.84375rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  color: var(--text-2);
  white-space: nowrap;
  transition: color 0.13s, border-color 0.13s;
  background: none;
  border-top: none;
  border-left: none;
  border-right: none;
  font-family: inherit;
  margin-bottom: -1px;
}

.tab.active { color: var(--text); border-bottom-color: var(--accent); }
.tab:hover:not(.active) { color: var(--text); }


/* ═══════════════════════════════════════
   CONVERTER (units)
═══════════════════════════════════════ */
.converter { padding: 1.75rem; }

.conv-row {
  display: flex;
  align-items: flex-end;
  gap: 0.875rem;
}

.conv-field {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.field-label {
  font-size: 0.6875rem;
  font-weight: 700;
  color: var(--text-2);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.conv-field input {
  height: 54px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0 1rem;
  font-size: 1.25rem;
  font-weight: 700;
  font-family: inherit;
  letter-spacing: -0.025em;
  color: var(--text);
  background: var(--card);
  outline: none;
  transition: border-color 0.13s, box-shadow 0.13s;
  width: 100%;
}

.conv-field input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}

.conv-field input.result {
  background: var(--accent-dim);
  border-color: oklch(57% 0.22 262 / 0.4);
  color: var(--accent);
}

body.dark .conv-field input.result {
  color: oklch(76% 0.18 262);
}

.conv-field select {
  height: 38px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0 0.75rem;
  font-size: 0.84375rem;
  font-family: inherit;
  font-weight: 500;
  color: var(--text);
  background: var(--card);
  outline: none;
  transition: border-color 0.13s, box-shadow 0.13s;
  width: 100%;
  cursor: pointer;
}

.conv-field select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}

.swap-btn {
  width: 40px;
  height: 40px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--card);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-bottom: 0.5rem;
  transition: all 0.13s;
  color: var(--text-2);
  font-family: inherit;
}

.swap-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-dim);
}


/* ═══════════════════════════════════════
   COMMON CONVERSIONS TABLE
═══════════════════════════════════════ */
.common {
  margin-top: 1.75rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}

.common h3 {
  font-size: 0.6875rem;
  font-weight: 700;
  color: var(--text-2);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.75rem;
}

.conv-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.84375rem;
}

.conv-table th {
  text-align: left;
  padding: 0.4rem 0.625rem;
  color: var(--text-2);
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  border-bottom: 1px solid var(--border);
}

.conv-table td {
  padding: 0.5rem 0.625rem;
  border-bottom: 1px solid var(--border-sub);
}

.conv-table tr:last-child td { border-bottom: none; }

.conv-table tbody tr {
  cursor: pointer;
  transition: background 0.1s;
}

.conv-table tbody tr:hover td { background: var(--accent-dim); }


/* ═══════════════════════════════════════
   TIME TOOL — INPUTS
═══════════════════════════════════════ */
.inputs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.875rem;
  align-items: flex-end;
  padding: 1.5rem 1.75rem;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  flex: 1;
  min-width: 145px;
}

.field label {
  font-size: 0.6875rem;
  font-weight: 700;
  color: var(--text-2);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.field input, .field select {
  height: 42px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0 0.875rem;
  font-size: 0.9375rem;
  font-family: inherit;
  font-weight: 500;
  color: var(--text);
  background: var(--card);
  outline: none;
  transition: border-color 0.13s, box-shadow 0.13s;
  width: 100%;
}

.field input:focus, .field select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}

.btn-convert {
  height: 42px;
  padding: 0 1.375rem;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 600;
  font-family: inherit;
  letter-spacing: -0.01em;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.13s, box-shadow 0.13s;
}

.btn-convert:hover {
  background: var(--accent-hover);
  box-shadow: 0 4px 14px var(--accent-dim);
}


/* ═══════════════════════════════════════
   TIME TOOL — RESULTS / CITY GRID
═══════════════════════════════════════ */
.results {
  padding: 0 1.75rem 1.75rem;
  border-top: 1px solid var(--border);
}

.results-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0 0.875rem;
}

.results-title {
  font-size: 0.6875rem;
  font-weight: 700;
  color: var(--text-2);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.btn-copy-all {
  font-size: 0.78125rem;
  font-weight: 600;
  font-family: inherit;
  padding: 0.35rem 0.875rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-xs);
  background: var(--card);
  cursor: pointer;
  color: var(--text-2);
  transition: all 0.13s;
  letter-spacing: -0.005em;
}

.btn-copy-all:hover { border-color: var(--accent); color: var(--accent); }

.city-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
  gap: 0.625rem;
}

.city-card {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.875rem 1rem;
  cursor: pointer;
  transition: all 0.13s;
  user-select: none;
}

.city-card:hover {
  border-color: var(--accent);
  background: var(--accent-dim);
}

.city-card.copied {
  border-color: oklch(54% 0.2 148);
  background: oklch(96% 0.07 148);
}

body.dark .city-card.copied {
  background: oklch(22% 0.1 148);
  border-color: oklch(54% 0.2 148);
}

.city-name {
  font-size: 0.78125rem;
  color: var(--text-2);
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 0.35rem;
  margin-bottom: 0.25rem;
}

.city-time {
  font-size: 1.4375rem;
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.1;
  margin: 0.1rem 0;
}

.city-date { font-size: 0.71875rem; color: var(--text-2); margin-top: 0.1rem; }

.city-diff {
  font-size: 0.6875rem;
  color: var(--text-2);
  margin-top: 0.25rem;
  font-weight: 500;
}


/* ═══════════════════════════════════════
   FAQ
═══════════════════════════════════════ */
.faq {
  max-width: var(--max-w);
  margin: 2.75rem auto 0;
  padding: 0 1.25rem;
}

.faq h2 {
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-2);
  margin-bottom: 0;
}

.faq-item {
  border-top: 1px solid var(--border);
  padding: 0.9375rem 0;
}

.faq-item:last-child { border-bottom: 1px solid var(--border); }

.faq-q {
  font-weight: 600;
  font-size: 0.875rem;
  letter-spacing: -0.015em;
  margin-bottom: 0.35rem;
  color: var(--text);
}

.faq-a {
  color: var(--text-2);
  font-size: 0.84375rem;
  line-height: 1.65;
}


/* ═══════════════════════════════════════
   FOOTER
═══════════════════════════════════════ */
footer {
  max-width: var(--max-w);
  margin: 3.5rem auto 0;
  padding: 1.25rem 1.25rem 2rem;
  border-top: 1px solid var(--border);
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
  font-size: 0.78125rem;
  color: var(--text-2);
}

footer.narrow { max-width: var(--max-w-narrow); }

.footer-links {
  display: flex;
  gap: 1.25rem;
}

.footer-links a {
  color: var(--text-2);
  font-weight: 500;
  transition: color 0.13s;
}

.footer-links a:hover { color: var(--text); }


/* ═══════════════════════════════════════
   CONTENT PAGES (about, privacy)
═══════════════════════════════════════ */
.page-header {
  max-width: var(--max-w-narrow);
  margin: 3.5rem auto 0;
  padding: 0 1.25rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--border);
}

.page-header h1 {
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 900;
  letter-spacing: -0.045em;
  line-height: 1.1;
  margin-bottom: 0.5rem;
}

.page-header p {
  color: var(--text-2);
  font-size: 0.9375rem;
  line-height: 1.6;
}

.content {
  max-width: var(--max-w-narrow);
  margin: 0 auto;
  padding: 0 1.25rem 0;
}

.content-section {
  padding: 1.75rem 0;
  border-bottom: 1px solid var(--border-sub);
}

.content-section:last-child { border-bottom: none; }

.content-section h2 {
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-2);
  margin-bottom: 0.625rem;
}

.content-section p {
  color: var(--text-2);
  font-size: 0.9375rem;
  line-height: 1.7;
  margin-bottom: 0.625rem;
  text-wrap: pretty;
}

.content-section p:last-child { margin-bottom: 0; }
.content-section a { color: var(--accent); }
.content-section a:hover { text-decoration: underline; }


/* ═══════════════════════════════════════
   CONTACT FORM
═══════════════════════════════════════ */
.contact-wrapper {
  max-width: var(--max-w-narrow);
  margin: 0 auto;
  padding: 0 1.25rem;
}

.contact-intro {
  padding: 1.75rem 0 1.5rem;
  border-bottom: 1px solid var(--border);
}

.contact-intro p {
  color: var(--text-2);
  font-size: 0.9375rem;
  line-height: 1.65;
}

.contact-intro a { color: var(--accent); }
.contact-intro a:hover { text-decoration: underline; }

.form-card {
  margin-top: 1.75rem;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
  box-shadow: var(--shadow-xs);
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  margin-bottom: 1.125rem;
}

.form-field:last-of-type { margin-bottom: 1.375rem; }

.form-field label {
  font-size: 0.6875rem;
  font-weight: 700;
  color: var(--text-2);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.form-field input, .form-field textarea {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.65rem 0.875rem;
  font-size: 0.9375rem;
  font-family: inherit;
  font-weight: 400;
  color: var(--text);
  background: var(--card);
  outline: none;
  transition: border-color 0.13s, box-shadow 0.13s;
  width: 100%;
}

.form-field input:focus, .form-field textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}

.form-field textarea {
  resize: vertical;
  min-height: 115px;
  line-height: 1.6;
}

.btn-submit {
  height: 44px;
  padding: 0 1.5rem;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 600;
  font-family: inherit;
  letter-spacing: -0.01em;
  cursor: pointer;
  transition: background 0.13s, box-shadow 0.13s;
}

.btn-submit:hover {
  background: var(--accent-hover);
  box-shadow: 0 4px 14px var(--accent-dim);
}


/* ═══════════════════════════════════════
   RESPONSIVE
═══════════════════════════════════════ */
@media (max-width: 640px) {
  .nav-inner { padding: 0 1rem; }
  .hero { margin-top: 2.75rem; }
  .grid { padding: 0 1rem; }
  .section-label { padding: 0 1rem; }
  .ad-top, .ad-mid { padding: 0 1rem; }
  .tool { padding: 0 1rem; }
  .faq { padding: 0 1rem; }
  footer { padding: 1.25rem 1rem 2rem; }

  .conv-row { flex-wrap: wrap; }
  .swap-btn { width: 100%; border-radius: var(--radius-sm); height: 38px; margin-bottom: 0; order: 3; }

  .inputs { padding: 1.25rem 1rem; gap: 0.75rem; }
  .field { min-width: unset; width: 100%; }
  .btn-convert { width: 100%; }

  .results { padding: 0 1rem 1.25rem; }
  .city-grid { grid-template-columns: 1fr 1fr; }

  .converter { padding: 1.25rem 1rem; }

  .page-header { padding: 2.5rem 1rem 1.5rem; }
  .content { padding: 0 1rem; }
  .contact-wrapper { padding: 0 1rem; }

  .hero h1 { letter-spacing: -0.035em; }
}

@media (max-width: 380px) {
  .city-grid { grid-template-columns: 1fr; }
}