/* ═══════════════════════════════════════════
   BikeSetup.Pro — Shared Stylesheet
   IndyCar / Racing aesthetic · White bg
═══════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Bebas+Neue&family=Barlow:ital,wght@0,300;0,400;0,500;0,600;1,300;1,400&family=Barlow+Condensed:wght@400;600;700;900&display=swap');

:root {
  --bg:      #ffffff;
  --surface: #f5f5f5;
  --surface2: #ececec;
  --surface3: #e0e0e0;
  --border:  #d0d0d0;
  --black:   #0a0a0a;
  --text:    #111111;
  --muted:   #666666;
  --faint:   #999999;
  --accent:  #e8000d;
  --accent2: #0057a8;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Barlow', sans-serif;
  font-weight: 400;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

/* ── CHECKER BANDS ── */
.checker-band {
  height: 16px;
  background-image: repeating-conic-gradient(var(--black) 0% 25%, #fff 0% 50%);
  background-size: 16px 16px;
  flex-shrink: 0;
}
.checker-band.thin { height: 10px; background-size: 10px 10px; }

/* ── SITEWIDE HEADER ── */
.site-header {
  background: var(--black);
  padding: 0 2.5rem;
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  min-height: 64px;
  border-bottom: 3px solid var(--accent);
}
.site-header::before {
  content: '';
  position: absolute;
  right: 0; top: 0; bottom: 0;
  width: 360px;
  background: repeating-linear-gradient(-60deg, transparent, transparent 18px, rgba(255,255,255,0.025) 18px, rgba(255,255,255,0.025) 20px);
  pointer-events: none;
}

.header-logo {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  text-decoration: none;
  position: relative;
  z-index: 1;
}
.header-logo .wordmark {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 1.9rem;
  letter-spacing: 0.04em;
  color: #fff;
  line-height: 1;
}
.header-logo .dot  { color: var(--accent); }
.header-logo .pro  { color: var(--accent); font-size: 0.75em; }
.header-logo .tagline {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: #555;
  display: none;
}

/* Site nav links */
.site-nav {
  display: flex;
  align-items: center;
  gap: 0.2rem;
  position: relative;
  z-index: 1;
}
.site-nav a {
  color: #888;
  text-decoration: none;
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 700;
  font-size: 0.82rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.5rem 0.9rem;
  border-radius: 2px;
  transition: color 0.15s, background 0.15s;
}
.site-nav a:hover { color: #fff; background: rgba(255,255,255,0.06); }
.site-nav a.active { color: #fff; }
.site-nav a.btn-nav {
  background: var(--accent);
  color: #fff;
  padding: 0.45rem 1.1rem;
  margin-left: 0.4rem;
}
.site-nav a.btn-nav:hover { opacity: 0.88; background: var(--accent); }

/* Mobile hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 4px;
  cursor: pointer;
  padding: 0.4rem;
  background: none;
  border: none;
  z-index: 2;
}
.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: #888;
  transition: background 0.15s;
}
.hamburger:hover span { background: #fff; }

/* Mobile nav open state */
.site-header.nav-open .site-nav {
  display: flex;
  flex-direction: column;
  position: absolute;
  top: 100%;
  left: 0; right: 0;
  background: var(--black);
  border-top: 1px solid #222;
  padding: 0.6rem 0 1rem;
  gap: 0;
}
.site-header.nav-open .site-nav a {
  padding: 0.7rem 2rem;
  border-radius: 0;
  font-size: 0.9rem;
}

/* ── PAGE LAYOUT: sidebar + content ── */
.page-body {
  display: flex;
  align-items: flex-start;
  flex: 1;
}

/* ── SIDEBAR ── */
.sidebar {
  width: 210px;
  flex-shrink: 0;
  position: sticky;
  top: 67px; /* site-header height */
  height: calc(100vh - 67px);
  background: var(--black);
  border-right: 3px solid var(--accent);
  display: flex;
  flex-direction: column;
  padding: 1.6rem 0 2rem;
  overflow-y: auto;
  scrollbar-width: none;
}
.sidebar::-webkit-scrollbar { display: none; }

.sidebar-label {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: #444;
  padding: 0 1.2rem;
  margin-bottom: 0.8rem;
}
.sidebar-divider {
  height: 1px;
  background: #222;
  margin: 0.5rem 1.2rem 0.7rem;
}

/* Sidebar nav buttons */
.sidebar nav { display: flex; flex-direction: column; gap: 0; }

.sidebar nav button,
.sidebar nav a {
  padding: 0.72rem 1.2rem;
  background: none;
  border: none;
  border-left: 3px solid transparent;
  color: #666;
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 700;
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
  transition: color 0.15s, background 0.15s, border-color 0.15s;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-align: left;
  width: 100%;
  text-decoration: none;
}
.sidebar nav button:hover,
.sidebar nav a:hover { color: #ccc; background: rgba(255,255,255,0.04); }
.sidebar nav button.active,
.sidebar nav a.active {
  color: #fff;
  border-left-color: var(--accent);
  background: rgba(232,0,13,0.08);
}

.nav-icon {
  width: 28px; height: 28px;
  flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  opacity: 0.5;
  transition: opacity 0.15s;
}
.sidebar nav button:hover .nav-icon,
.sidebar nav a:hover .nav-icon { opacity: 0.8; }
.sidebar nav button.active .nav-icon,
.sidebar nav a.active .nav-icon { opacity: 1; }
.nav-icon svg {
  width: 20px; height: 20px;
  fill: none; stroke: currentColor;
  stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round;
}

.nav-text { line-height: 1.1; }
.nav-text .nav-sub {
  display: block;
  font-size: 0.6rem;
  font-weight: 400;
  letter-spacing: 0.06em;
  color: #555;
  margin-top: 0.1rem;
  text-transform: none;
}
.sidebar nav button.active .nav-sub,
.sidebar nav a.active .nav-sub { color: #888; }

/* ── MAIN CONTENT AREA ── */
main {
  flex: 1;
  min-width: 0;
  padding: 2.5rem 2.8rem 5rem;
}

/* ── PANELS ── */
.calc-panel { display: none; animation: fadeUp 0.2s ease; }
.calc-panel.active { display: block; }

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── PANEL HEADER ── */
.panel-header {
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 2px solid var(--border);
}
.panel-tag {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.3rem;
}
.panel-title {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 2.4rem;
  letter-spacing: 0.04em;
  color: var(--text);
  line-height: 1;
  margin-bottom: 0.7rem;
}
.panel-desc {
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.65;
  max-width: 660px;
  font-weight: 300;
  border-left: 3px solid var(--accent);
  padding-left: 1rem;
}

/* ── FORMS ── */
.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
  gap: 1.2rem;
  margin: 1.8rem 0 1.5rem;
}
.field { display: flex; flex-direction: column; gap: 0.4rem; }
.label-row { display: flex; align-items: center; gap: 0.4rem; }
label {
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 700;
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

input[type="number"], select {
  background: var(--bg);
  border: 2px solid var(--border);
  color: var(--text);
  padding: 0.6rem 0.85rem;
  font-family: 'Barlow', sans-serif;
  font-size: 0.95rem;
  font-weight: 500;
  border-radius: 2px;
  outline: none;
  transition: border-color 0.15s;
  width: 100%;
  appearance: none;
  -webkit-appearance: none;
}
input[type="number"]:focus, select:focus { border-color: var(--accent); }
input::placeholder { color: #ccc; font-weight: 300; }

.select-wrap { position: relative; }
.select-wrap::after {
  content: '▼';
  position: absolute;
  right: 0.7rem; top: 50%;
  transform: translateY(-50%);
  font-size: 0.5rem;
  color: var(--muted);
  pointer-events: none;
}
.select-wrap select { padding-right: 2rem; }

/* Unit toggle */
.unit-toggle {
  display: flex;
  border: 2px solid var(--border);
  border-radius: 2px;
  overflow: hidden;
  flex-shrink: 0;
}
.unit-toggle button {
  padding: 0.6rem 0.75rem;
  background: var(--bg);
  border: none;
  border-right: 1px solid var(--border);
  color: var(--muted);
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 700;
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  cursor: pointer;
  transition: background 0.12s, color 0.12s;
}
.unit-toggle button:last-child { border-right: none; }
.unit-toggle button.active { background: var(--black); color: #fff; }
.input-with-toggle { display: flex; gap: 0.5rem; align-items: stretch; }
.input-with-toggle input { flex: 1; min-width: 0; }

/* Tooltip */
.tip-btn {
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--surface2);
  border: 1.5px solid var(--border);
  color: var(--muted);
  font-size: 0.6rem;
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 700;
  display: flex; align-items: center; justify-content: center;
  cursor: help;
  flex-shrink: 0;
  transition: background 0.12s, color 0.12s;
  position: relative;
}
.tip-btn:hover { background: var(--accent); color: #fff; border-color: var(--accent); }
.tip-btn .tip-text {
  display: none;
  position: absolute;
  left: 50%;
  bottom: calc(100% + 8px);
  transform: translateX(-50%);
  background: var(--black);
  color: #fff;
  font-family: 'Barlow', sans-serif;
  font-weight: 300;
  font-size: 0.78rem;
  line-height: 1.5;
  padding: 0.65rem 0.85rem;
  border-radius: 2px;
  width: 220px;
  z-index: 200;
  box-shadow: 0 4px 20px rgba(0,0,0,0.2);
  pointer-events: none;
  white-space: normal;
}
.tip-btn .tip-text::after {
  content: '';
  position: absolute;
  top: 100%; left: 50%;
  transform: translateX(-50%);
  border: 5px solid transparent;
  border-top-color: var(--black);
}
.tip-btn:hover .tip-text { display: block; }

/* ── BUTTONS ── */
.btn {
  background: var(--accent);
  color: #fff;
  border: none;
  padding: 0.85rem 2.4rem;
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  cursor: pointer;
  border-radius: 2px;
  transition: opacity 0.15s, transform 0.1s;
  position: relative;
  overflow: hidden;
  display: inline-block;
  text-decoration: none;
}
.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-conic-gradient(rgba(255,255,255,0.06) 0% 25%, transparent 0% 50%);
  background-size: 8px 8px;
}
.btn:hover { opacity: 0.9; transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn-outline {
  background: transparent;
  color: var(--text);
  border: 2px solid var(--black);
  padding: 0.75rem 2rem;
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 700;
  font-size: 0.88rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  cursor: pointer;
  border-radius: 2px;
  transition: background 0.15s, color 0.15s;
  text-decoration: none;
  display: inline-block;
}
.btn-outline:hover { background: var(--black); color: #fff; }

.btn-blue {
  background: var(--accent2);
}

/* ── RESULT BOXES ── */
.result-box {
  margin-top: 1.8rem;
  background: var(--black);
  border: 2px solid var(--black);
  border-radius: 2px;
  padding: 1.6rem;
  display: none;
  position: relative;
  overflow: hidden;
  color: #fff;
}
.result-box::before {
  content: '';
  position: absolute;
  top: 0; right: 0;
  width: 60px; height: 60px;
  background-image: repeating-conic-gradient(rgba(255,255,255,0.08) 0% 25%, transparent 0% 50%);
  background-size: 10px 10px;
  pointer-events: none;
}
.result-box.visible { display: block; animation: fadeUp 0.2s ease; }

.result-label {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: #888;
  margin-bottom: 0.2rem;
}
.result-value {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 2.8rem;
  color: var(--accent);
  line-height: 1;
  letter-spacing: 0.03em;
}
.result-unit {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 1.1rem;
  font-weight: 400;
  color: #666;
  margin-left: 0.2rem;
  letter-spacing: 0.05em;
}
.result-note {
  margin-top: 1rem;
  font-size: 0.84rem;
  color: #aaa;
  line-height: 1.6;
  font-weight: 300;
  border-top: 1px solid #333;
  padding-top: 0.8rem;
}
.result-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(145px, 1fr));
  gap: 0.9rem;
  margin-top: 0.5rem;
}
.result-card {
  background: #1a1a1a;
  border: 1px solid #333;
  border-radius: 2px;
  padding: 0.9rem 0.85rem;
}
.result-card .result-value { font-size: 1.8rem; }
.dual-result {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-bottom: 0.5rem;
}

/* ── BIKE LOOKUP ── */
.bike-lookup {
  background: var(--surface);
  border: 2px solid var(--border);
  border-left: 4px solid var(--accent2);
  border-radius: 2px;
  padding: 1.1rem 1.2rem;
  margin-bottom: 1.5rem;
}
.bike-lookup-header { display: flex; align-items: center; gap: 0.6rem; margin-bottom: 0.7rem; flex-wrap: wrap; }
.bike-lookup-label {
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 700;
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent2);
}
.bike-lookup-sub { font-size: 0.8rem; color: var(--muted); font-weight: 300; }
.bike-lookup-row { display: flex; gap: 0.7rem; align-items: center; flex-wrap: wrap; }
.bike-lookup-row .select-wrap { flex: 1; min-width: 200px; }
.btn-apply {
  background: var(--accent2);
  color: #fff;
  border: none;
  padding: 0.62rem 1.2rem;
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 700;
  font-size: 0.82rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  cursor: pointer;
  border-radius: 2px;
  transition: opacity 0.15s;
  white-space: nowrap;
}
.btn-apply:hover { opacity: 0.85; }
.bike-disclaimer {
  margin-top: 0.7rem;
  font-size: 0.75rem;
  color: var(--faint);
  font-weight: 300;
  display: flex;
  align-items: flex-start;
  gap: 0.35rem;
  line-height: 1.5;
}
.bike-disclaimer::before { content: '⚠'; font-size: 0.7rem; color: #f0a500; flex-shrink: 0; margin-top: 0.1rem; }
#bike-selected-info {
  margin-top: 0.6rem;
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--accent2);
  display: none;
}

/* ── SEALANT BRANDS ── */
.brand-results { margin-top: 1.2rem; }
.brand-header {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: #666;
  margin-bottom: 0.7rem;
}
.brand-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 0.8rem; }
.brand-card {
  background: #1a1a1a;
  border: 1px solid #333;
  border-left: 3px solid #444;
  border-radius: 2px;
  padding: 0.85rem 0.9rem;
}
.brand-card.highlight { border-left-color: var(--accent); }
.brand-name { font-family: 'Barlow Condensed', sans-serif; font-weight: 700; font-size: 0.75rem; letter-spacing: 0.08em; text-transform: uppercase; color: #ddd; margin-bottom: 0.3rem; }
.brand-amount { font-family: 'Bebas Neue', sans-serif; font-size: 1.6rem; color: var(--accent); line-height: 1; }
.brand-amount .result-unit { font-size: 0.8rem; }
.brand-note { font-size: 0.7rem; color: #888; margin-top: 0.3rem; line-height: 1.4; }

/* ── GEAR TABLE ── */
.gear-table { width: 100%; border-collapse: collapse; margin-top: 0.8rem; }
.gear-table th { font-family: 'Barlow Condensed', sans-serif; font-size: 0.68rem; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; color: #888; text-align: left; padding: 0.5rem 0.7rem; border-bottom: 1px solid #333; }
.gear-table td { padding: 0.5rem 0.7rem; border-bottom: 1px solid #222; font-family: 'Barlow', sans-serif; font-size: 0.82rem; color: #ccc; }
.gear-table tr:hover td { background: #222; }
.gear-table .highlight td { color: var(--accent); }
.badge { display: inline-block; background: var(--accent); color: #fff; font-family: 'Barlow Condensed', sans-serif; font-size: 0.6rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; padding: 0.1rem 0.4rem; border-radius: 2px; margin-left: 0.4rem; vertical-align: middle; }
.combos-header { font-family: 'Barlow Condensed', sans-serif; font-size: 0.68rem; font-weight: 700; letter-spacing: 0.18em; text-transform: uppercase; color: #888; margin: 1.2rem 0 0.5rem; }

/* ── GUIDE STYLES ── */
.guide-content {
  max-width: 720px;
}
.guide-content h2 {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 1.8rem;
  letter-spacing: 0.04em;
  color: var(--text);
  margin: 2rem 0 0.8rem;
  line-height: 1;
}
.guide-content h2:first-child { margin-top: 0; }
.guide-content p {
  font-size: 0.95rem;
  line-height: 1.75;
  color: #333;
  font-weight: 300;
  margin-bottom: 1rem;
}
.guide-content ul, .guide-content ol {
  padding-left: 1.4rem;
  margin-bottom: 1.2rem;
}
.guide-content li {
  font-size: 0.93rem;
  line-height: 1.7;
  color: #333;
  font-weight: 300;
  margin-bottom: 0.3rem;
}
.guide-content strong { font-weight: 600; color: var(--text); }

/* Step cards */
.steps { display: flex; flex-direction: column; gap: 0; margin: 1.5rem 0 2rem; }
.step {
  display: flex;
  gap: 1.2rem;
  padding: 1.2rem 0;
  border-bottom: 1px solid var(--border);
  align-items: flex-start;
}
.step:last-child { border-bottom: none; }
.step-num {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 2rem;
  color: var(--accent);
  line-height: 1;
  min-width: 2.5rem;
  text-align: center;
  flex-shrink: 0;
  padding-top: 0.1rem;
}
.step-body { flex: 1; min-width: 0; }
.step-title {
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text);
  margin-bottom: 0.35rem;
}
.step-body p {
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.65;
  margin-bottom: 0;
}

/* Pro tip callout */
.pro-tip {
  background: #fffbe6;
  border: 1.5px solid #f0c040;
  border-left: 4px solid #f0c040;
  border-radius: 2px;
  padding: 0.9rem 1.1rem;
  margin: 1.2rem 0;
  font-size: 0.88rem;
  color: #555;
  line-height: 1.6;
  font-weight: 300;
}
.pro-tip::before {
  content: '★  PRO TIP  ';
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 700;
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  color: #b08800;
  display: block;
  margin-bottom: 0.3rem;
}

.warning-tip {
  background: #fff5f5;
  border: 1.5px solid #e8a0a0;
  border-left: 4px solid var(--accent);
  border-radius: 2px;
  padding: 0.9rem 1.1rem;
  margin: 1.2rem 0;
  font-size: 0.88rem;
  color: #555;
  line-height: 1.6;
  font-weight: 300;
}
.warning-tip::before {
  content: '⚠  WATCH OUT  ';
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 700;
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  color: var(--accent);
  display: block;
  margin-bottom: 0.3rem;
}

/* Tools list */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 0.7rem;
  margin: 1rem 0 1.5rem;
}
.tool-item {
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: 2px;
  padding: 0.7rem 0.9rem;
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 600;
  font-size: 0.82rem;
  letter-spacing: 0.05em;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.tool-item::before { content: '✓'; color: var(--accent2); font-size: 0.75rem; flex-shrink: 0; }

/* Guide related links */
.guide-related {
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 2px solid var(--border);
  display: flex;
  gap: 0.8rem;
  flex-wrap: wrap;
  align-items: center;
}
.guide-related-label {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  flex-basis: 100%;
  margin-bottom: 0.3rem;
}

/* ── FOOTER ── */
footer {
  background: var(--black);
  color: #555;
  text-align: center;
  padding: 1.5rem 2rem;
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  margin-top: auto;
}
footer span { color: var(--accent); }
footer a { color: #555; text-decoration: none; }
footer a:hover { color: #888; }

/* ── RESPONSIVE ── */
@media (max-width: 860px) {
  .sidebar {
    width: 180px;
  }
  main { padding: 2rem 1.8rem 4rem; }
}

@media (max-width: 680px) {
  .page-body { flex-direction: column; }
  .sidebar {
    width: 100%;
    height: auto;
    position: static;
    flex-direction: row;
    padding: 0;
    border-right: none;
    border-bottom: 3px solid var(--accent);
    overflow-x: auto;
  }
  .sidebar-label, .sidebar-divider { display: none; }
  .sidebar nav {
    flex-direction: row;
    flex-wrap: nowrap;
    overflow-x: auto;
    scrollbar-width: none;
  }
  .sidebar nav::-webkit-scrollbar { display: none; }
  .sidebar nav button,
  .sidebar nav a {
    border-left: none;
    border-bottom: 3px solid transparent;
    padding: 0.7rem 0.9rem;
    flex-direction: column;
    gap: 0.2rem;
    align-items: center;
    text-align: center;
    font-size: 0.68rem;
    min-width: 65px;
    white-space: nowrap;
  }
  .sidebar nav button.active,
  .sidebar nav a.active {
    border-bottom-color: var(--accent);
    border-left-color: transparent;
  }
  .nav-icon { width: 22px; height: 22px; }
  .nav-text .nav-sub { display: none; }
  main { padding: 1.5rem 1rem 3rem; }
  .dual-result { grid-template-columns: 1fr; }
  .input-with-toggle { flex-wrap: wrap; }
  .hamburger { display: flex; }
  .site-nav { display: none; }
  .site-header { padding: 0 1.2rem; }
}