/* ===== AI-CALCULATOR.ORG - MASTER STYLESHEET ===== */
@import url('https://fonts.googleapis.com/css2?family=Sora:wght@400;600;700;800&family=DM+Sans:wght@400;500;600&display=swap');

:root {
  --primary: #0a0e1a;
  --primary2: #0f1f3d;
  --accent: #00c9a7;
  --accent2: #4f6ef7;
  --accent-glow: rgba(0,201,167,0.15);
  --bg: #f8fafc;
  --bg2: #eef2f7;
  --card: #ffffff;
  --text: #1a2332;
  --text2: #4a5568;
  --border: #e2e8f0;
  --radius: 14px;
  --shadow: 0 4px 24px rgba(10,14,26,0.08);
  --shadow-lg: 0 8px 48px rgba(10,14,26,0.14);
  --max-w: 860px;
  --font-h: 'Sora', sans-serif;
  --font-b: 'DM Sans', sans-serif;
  --transition: 0.22s cubic-bezier(.4,0,.2,1);
}

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

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font-b);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--accent2); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent); }

/* ===== HEADER ===== */
.site-header {
  background: var(--primary);
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  backdrop-filter: blur(10px);
}
.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 16px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  flex-shrink: 0;
  min-width: 0;
}
.logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, #0a0e1a, #1a2540);
  border: 1px solid rgba(0,201,167,0.3);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: Georgia, serif;
  font-size: 1.3rem;
  font-weight: 900;
  color: #00c9a7;
  flex-shrink: 0;
}
.logo-text {
  font-family: var(--font-h);
  font-weight: 800;
  font-size: 1.1rem;
  color: #fff;
  letter-spacing: -0.02em;
}
.logo-text span { color: var(--accent); }

.header-search {
  flex: 1;
  max-width: 380px;
  position: relative;
}
.header-search input {
  width: 100%;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 40px;
  padding: 8px 16px 8px 40px;
  color: #fff;
  font-family: var(--font-b);
  font-size: 0.9rem;
  outline: none;
  transition: all var(--transition);
}
.header-search input::placeholder { color: rgba(255,255,255,0.4); }
.header-search input:focus { background: rgba(255,255,255,0.13); border-color: var(--accent); }
.header-search .search-icon {
  position: absolute;
  left: 13px;
  top: 50%;
  transform: translateY(-50%);
  color: rgba(255,255,255,0.4);
  font-size: 15px;
  pointer-events: none;
}
.nav-links { display: flex; align-items: center; gap: 8px; }
.nav-links a {
  color: rgba(255,255,255,0.7);
  font-size: 0.88rem;
  font-weight: 500;
  padding: 6px 12px;
  border-radius: 8px;
  transition: all var(--transition);
  white-space: nowrap;
}
.nav-links a:hover { color: #fff; background: rgba(255,255,255,0.08); }

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 6px;
  background: none;
  border: none;
}
.hamburger span {
  width: 22px;
  height: 2px;
  background: rgba(255,255,255,0.8);
  border-radius: 2px;
  transition: all var(--transition);
  display: block;
}

/* ===== MOBILE NAV ===== */
.mobile-nav {
  display: none;
  position: fixed;
  inset: 0;
  background: var(--primary);
  z-index: 200;
  flex-direction: column;
  padding: 80px 24px 40px;
  overflow-y: auto;
}
.mobile-nav.open { display: flex; }
.mobile-nav .close-btn {
  position: absolute;
  top: 18px;
  right: 20px;
  background: none;
  border: none;
  color: #fff;
  font-size: 26px;
  cursor: pointer;
}
.mobile-nav a {
  color: rgba(255,255,255,0.85);
  font-size: 1.05rem;
  font-weight: 500;
  padding: 14px 0;
  border-bottom: 1px solid rgba(255,255,255,0.07);
  display: block;
}
.mobile-nav a:hover { color: var(--accent); }

/* ===== HERO ===== */
.hero {
  background: linear-gradient(135deg, #0a0e1a 0%, #0f1f3d 50%, #0a1628 100%);
  color: #fff;
  padding: 60px 20px 50px;
  text-align: center;
  position: relative;
  overflow: visible;
  z-index: 20;
}
.hero::before {
  content: '';
  position: absolute;
  top: -60px; left: 50%; transform: translateX(-50%);
  width: 600px; height: 300px;
  background: radial-gradient(ellipse, rgba(0,201,167,0.12) 0%, transparent 70%);
  pointer-events: none;
}
.hero h1 {
  font-family: var(--font-h);
  font-size: clamp(1.8rem, 5vw, 3rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 14px;
  letter-spacing: -0.03em;
}
.hero h1 span { color: var(--accent); }
.hero p {
  font-size: clamp(0.95rem, 2.5vw, 1.1rem);
  color: rgba(255,255,255,0.65);
  max-width: 560px;
  margin: 0 auto 28px;
}
.hero-search {
  max-width: 500px;
  margin: 0 auto;
  position: relative;
  z-index: 100;
}
.hero-search input {
  width: 100%;
  padding: 16px 56px 16px 22px;
  border-radius: 50px;
  border: 2px solid rgba(0,201,167,0.3);
  background: rgba(255,255,255,0.06);
  color: #fff;
  font-family: var(--font-b);
  font-size: 1rem;
  outline: none;
  transition: all var(--transition);
}
.hero-search input:focus { border-color: var(--accent); background: rgba(255,255,255,0.1); }
.hero-search input::placeholder { color: rgba(255,255,255,0.4); }
.hero-search button {
  position: absolute;
  right: 8px; top: 50%; transform: translateY(-50%);
  background: var(--accent);
  border: none;
  width: 40px; height: 40px;
  border-radius: 50%;
  color: var(--primary);
  font-size: 16px;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: all var(--transition);
}
.hero-search button:hover { background: #00e5be; transform: translateY(-50%) scale(1.05); }

/* Search dropdown */
.search-results-dropdown {
  position: absolute;
  top: calc(100% + 6px);
  left: 0; right: 0;
  background: #fff;
  border-radius: var(--radius);
  box-shadow: 0 12px 40px rgba(0,0,0,0.25);
  overflow: hidden;
  z-index: 99999;
  max-height: 320px;
  overflow-y: auto;
  display: none;
  border: 1px solid rgba(0,0,0,0.1);
}
.search-results-dropdown.show { display: block; }
.search-result-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 13px 18px;
  color: var(--text);
  font-size: 0.93rem;
  border-bottom: 1px solid var(--border);
  transition: background var(--transition);
  text-decoration: none;
  font-weight: 500;
}
.search-result-item:hover { background: #f0f4ff; color: var(--accent2); }
.search-result-item:last-child { border-bottom: none; }
.search-result-icon { font-size: 1.2rem; flex-shrink: 0; }
.search-result-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 18px;
  color: var(--text);
  font-size: 0.95rem;
  border-bottom: 1px solid var(--border);
  transition: background var(--transition);
}
.search-result-item:hover { background: var(--bg); }
.search-result-item:last-child { border-bottom: none; }
.search-result-icon { font-size: 1.2rem; }

/* ===== CATEGORY PILLS ===== */
.category-pills {
  display: flex;
  flex-wrap: nowrap;
  gap: 8px;
  overflow-x: auto;
  padding: 16px 20px 0;
  max-width: 1200px;
  margin: 0 auto;
  -ms-overflow-style: none;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}
.category-pills::-webkit-scrollbar { display: none; }
.pill {
  flex: 0 0 auto;
  padding: 9px 20px;
  border-radius: 50px;
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  border: 2px solid var(--border);
  background: var(--card);
  color: var(--text2);
  transition: all var(--transition);
  white-space: nowrap;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}
.pill:hover, .pill.active {
  background: var(--accent2);
  color: #fff;
  border-color: var(--accent2);
}

/* ===== MAIN LAYOUT ===== */
.main-wrap {
  max-width: 1200px;
  margin: 0 auto;
  padding: 28px 20px 60px;
  flex: 1;
}
.section-title {
  font-family: var(--font-h);
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text);
}
.section-title::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
  margin-left: 8px;
}

/* ===== CALCULATOR GRID ===== */
.calc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 14px;
  margin-bottom: 40px;
}
.calc-card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 20px 16px;
  border: 1px solid var(--border);
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 8px;
  position: relative;
  overflow: hidden;
}
.calc-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}
.calc-card:hover {
  box-shadow: var(--shadow);
  border-color: rgba(79,110,247,0.3);
  transform: translateY(-2px);
}
.calc-card:hover::before { transform: scaleX(1); }
.calc-icon {
  width: 44px; height: 44px;
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 4px;
  line-height: 1;
  font-family: "Segoe UI Emoji","Apple Color Emoji","Noto Color Emoji",sans-serif;
}
.calc-name {
  font-family: var(--font-h);
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.3;
}
.calc-desc {
  font-size: 0.8rem;
  color: var(--text2);
  line-height: 1.4;
}
.calc-badge {
  font-size: 0.7rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 20px;
  background: var(--accent-glow);
  color: var(--accent);
  margin-top: auto;
}

/* ===== CALCULATOR PAGE ===== */
.calc-page { max-width: var(--max-w); margin: 0 auto; }
.calc-hero {
  background: linear-gradient(135deg, #0a0e1a 0%, #0f1f3d 100%);
  color: #fff;
  border-radius: 20px;
  padding: 36px 32px;
  margin-bottom: 24px;
  position: relative;
  overflow: hidden;
}
.calc-hero::after {
  content: '';
  position: absolute;
  right: -40px; top: -40px;
  width: 200px; height: 200px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0,201,167,0.15), transparent);
}
.calc-hero-icon {
  font-size: 2.5rem;
  margin-bottom: 12px;
  position: relative;
}
.calc-hero h1 {
  font-family: var(--font-h);
  font-size: clamp(1.4rem, 4vw, 2rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
  position: relative;
}
.calc-hero p { color: rgba(255,255,255,0.65); font-size: 0.95rem; position: relative; }

/* ===== CALCULATOR CARD ===== */
.calculator-box {
  background: var(--card);
  border-radius: 20px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  overflow: hidden;
  margin-bottom: 24px;
}
.calc-tabs {
  display: flex;
  border-bottom: 1px solid var(--border);
  background: var(--bg);
}
.calc-tab {
  flex: 1;
  padding: 14px 20px;
  text-align: center;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  color: var(--text2);
  border: none;
  background: none;
  transition: all var(--transition);
  border-bottom: 3px solid transparent;
  font-family: var(--font-b);
}
.calc-tab.active {
  color: var(--accent2);
  border-bottom-color: var(--accent2);
  background: var(--card);
}
.calc-body { padding: 28px 24px; }

/* Form elements */
.form-group { margin-bottom: 20px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
label {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text2);
  margin-bottom: 8px;
  letter-spacing: 0.01em;
}
.form-input {
  width: 100%;
  padding: 12px 16px;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  font-family: var(--font-b);
  font-size: 1rem;
  color: var(--text);
  background: var(--bg);
  outline: none;
  transition: all var(--transition);
  -webkit-appearance: none;
}
.form-input:focus { border-color: var(--accent2); background: #fff; box-shadow: 0 0 0 4px rgba(79,110,247,0.1); }
.form-input:invalid { border-color: #ef4444; }
.input-prefix { position: relative; }
.input-prefix span {
  position: absolute;
  left: 14px; top: 50%; transform: translateY(-50%);
  font-weight: 600;
  color: var(--text2);
  font-size: 0.95rem;
  pointer-events: none;
}
.input-prefix .form-input { padding-left: 32px; }
.input-suffix { position: relative; }
.input-suffix span {
  position: absolute;
  right: 14px; top: 50%; transform: translateY(-50%);
  font-weight: 600;
  color: var(--text2);
  pointer-events: none;
}
.input-suffix .form-input { padding-right: 38px; }

/* Range slider */
.range-wrap { position: relative; }
input[type=range] {
  width: 100%;
  -webkit-appearance: none;
  height: 6px;
  border-radius: 3px;
  background: var(--border);
  outline: none;
  cursor: pointer;
  margin-top: 6px;
}
input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 20px; height: 20px;
  border-radius: 50%;
  background: var(--accent2);
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(79,110,247,0.35);
  transition: all var(--transition);
}
input[type=range]::-webkit-slider-thumb:hover { transform: scale(1.2); }
.range-labels { display: flex; justify-content: space-between; font-size: 0.78rem; color: var(--text2); margin-top: 4px; }

/* Select */
select.form-input {
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%234a5568' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 36px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: var(--radius);
  font-family: var(--font-b);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all var(--transition);
  letter-spacing: 0.01em;
}
.btn-primary {
  background: linear-gradient(135deg, var(--accent2), #6b8aff);
  color: #fff;
  box-shadow: 0 4px 16px rgba(79,110,247,0.35);
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 6px 20px rgba(79,110,247,0.45); }
.btn-accent {
  background: linear-gradient(135deg, var(--accent), #00e5be);
  color: var(--primary);
  box-shadow: 0 4px 16px rgba(0,201,167,0.3);
}
.btn-accent:hover { transform: translateY(-1px); }
.btn-outline {
  background: transparent;
  color: var(--text2);
  border: 2px solid var(--border);
}
.btn-outline:hover { border-color: var(--accent2); color: var(--accent2); }
.btn-full { width: 100%; }
.btn-group { display: flex; gap: 10px; flex-wrap: wrap; }

/* ===== RESULT BOX ===== */
.result-box {
  background: linear-gradient(135deg, #0a0e1a, #0f1f3d);
  border-radius: 16px;
  padding: 24px;
  color: #fff;
  margin: 24px 0 0;
  display: none;
}
.result-box.show { display: block; }
.result-box h3 {
  font-family: var(--font-h);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: rgba(255,255,255,0.5);
  margin-bottom: 16px;
}
.result-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 16px;
  margin-bottom: 20px;
}
.result-item { }
.result-label { font-size: 0.8rem; color: rgba(255,255,255,0.5); margin-bottom: 4px; }
.result-value {
  font-family: var(--font-h);
  font-size: 1.4rem;
  font-weight: 700;
  color: #fff;
}
.result-value.highlight { color: var(--accent); font-size: 1.8rem; }
.result-actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 16px; }
.result-actions .btn { font-size: 0.85rem; padding: 10px 18px; }

/* Breakdown table */
.breakdown-table { width: 100%; border-collapse: collapse; margin-top: 20px; font-size: 0.88rem; }
.breakdown-table th {
  background: rgba(255,255,255,0.08);
  padding: 10px 14px;
  text-align: left;
  font-weight: 600;
  color: rgba(255,255,255,0.7);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.breakdown-table td { padding: 10px 14px; border-bottom: 1px solid rgba(255,255,255,0.06); }
.breakdown-table tr:last-child td { border-bottom: none; }
.breakdown-table .total-row td { background: rgba(0,201,167,0.1); color: var(--accent); font-weight: 700; }

/* Chart container */
.chart-wrap {
  background: rgba(255,255,255,0.04);
  border-radius: 12px;
  padding: 20px;
  margin-top: 20px;
}
.chart-wrap h4 { font-size: 0.85rem; color: rgba(255,255,255,0.5); margin-bottom: 16px; font-family: var(--font-h); text-transform: uppercase; letter-spacing: 0.08em; }
.donut-chart { position: relative; width: 160px; height: 160px; margin: 0 auto; }
.donut-label {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%,-50%);
  text-align: center;
}
.donut-label .val { font-family: var(--font-h); font-size: 1.3rem; font-weight: 700; }
.donut-label .lbl { font-size: 0.72rem; color: rgba(255,255,255,0.5); }
.chart-legend { display: flex; justify-content: center; gap: 20px; margin-top: 14px; }
.legend-item { display: flex; align-items: center; gap: 6px; font-size: 0.82rem; color: rgba(255,255,255,0.7); }
.legend-dot { width: 10px; height: 10px; border-radius: 50%; flex-shrink: 0; }

/* ===== INFO SECTIONS ===== */
.info-card {
  background: var(--card);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  padding: 24px;
  margin-bottom: 20px;
}
.info-card h2 {
  font-family: var(--font-h);
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text);
}
.info-card p { color: var(--text2); font-size: 0.95rem; line-height: 1.75; margin-bottom: 12px; }
.info-card p:last-child { margin-bottom: 0; }
.formula-box {
  background: var(--bg);
  border-left: 4px solid var(--accent2);
  padding: 14px 18px;
  border-radius: 0 var(--radius) var(--radius) 0;
  font-family: 'Courier New', monospace;
  font-size: 0.92rem;
  color: var(--text);
  margin: 12px 0;
  overflow-x: auto;
}

/* ===== FAQ ACCORDION ===== */
.faq-list { display: flex; flex-direction: column; gap: 10px; }
.faq-item {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: box-shadow var(--transition);
}
.faq-item:hover { box-shadow: var(--shadow); }
.faq-q {
  width: 100%;
  padding: 16px 20px;
  text-align: left;
  background: none;
  border: none;
  cursor: pointer;
  font-family: var(--font-b);
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  transition: color var(--transition);
}
.faq-q:hover { color: var(--accent2); }
.faq-q .chevron {
  width: 22px; height: 22px;
  border-radius: 50%;
  background: var(--bg2);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  font-size: 12px;
  transition: transform var(--transition);
}
.faq-item.open .faq-q .chevron { transform: rotate(180deg); }
.faq-a {
  padding: 0 20px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.2s;
}
.faq-item.open .faq-a { max-height: 400px; padding: 0 20px 16px; }
.faq-a p { font-size: 0.92rem; color: var(--text2); line-height: 1.7; }

/* ===== STAR RATING ===== */
.rating-section {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  text-align: center;
  margin-bottom: 20px;
}
.rating-section h3 { font-family: var(--font-h); font-size: 1rem; font-weight: 700; margin-bottom: 6px; }
.rating-section p { color: var(--text2); font-size: 0.87rem; margin-bottom: 16px; }
.stars { display: flex; justify-content: center; gap: 8px; }
.star {
  font-size: 2rem;
  cursor: pointer;
  transition: transform var(--transition);
  filter: grayscale(1) opacity(0.4);
  -webkit-user-select: none;
  user-select: none;
}
.star:hover, .star.hovered, .star.selected {
  filter: none;
  transform: scale(1.2);
}
.star.selected { animation: starPop 0.3s ease; }
@keyframes starPop {
  0% { transform: scale(1); }
  50% { transform: scale(1.4); }
  100% { transform: scale(1.2); }
}
.rating-msg { margin-top: 10px; font-size: 0.88rem; font-weight: 600; color: var(--accent); min-height: 20px; }
.avg-rating { font-size: 0.85rem; color: var(--text2); margin-top: 6px; }

/* ===== PROMO CARD ===== */
.promo-card {
  background: linear-gradient(135deg, #0a0e1a, #1a1040);
  border-radius: 16px;
  padding: 24px;
  color: #fff;
  margin-bottom: 20px;
  border: 1px solid rgba(79,110,247,0.2);
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}
.promo-icon { font-size: 2.5rem; flex-shrink: 0; }
.promo-content { flex: 1; min-width: 200px; }
.promo-content h4 { font-family: var(--font-h); font-weight: 700; margin-bottom: 4px; }
.promo-content p { font-size: 0.87rem; color: rgba(255,255,255,0.6); }
.promo-btn {
  flex-shrink: 0;
  background: var(--accent);
  color: var(--primary);
  padding: 10px 20px;
  border-radius: 10px;
  font-weight: 700;
  font-size: 0.88rem;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all var(--transition);
  text-decoration: none;
}
.promo-btn:hover { background: #00e5be; color: var(--primary); transform: translateY(-1px); }

/* ===== BREADCRUMB ===== */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
  color: var(--text2);
  margin-bottom: 20px;
  flex-wrap: wrap;
}
.breadcrumb a { color: var(--text2); }
.breadcrumb a:hover { color: var(--accent2); }
.breadcrumb .sep { color: var(--border); }
.breadcrumb .current { color: var(--text); font-weight: 600; }

/* ===== RELATED CALCULATORS ===== */
.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 12px;
}
.related-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 12px;
  transition: all var(--transition);
}
.related-card:hover { border-color: var(--accent2); box-shadow: var(--shadow); transform: translateY(-1px); }
.related-card .icon { font-size: 1.4rem; }
.related-card .name { font-size: 0.88rem; font-weight: 600; color: var(--text); }

/* ===== FOOTER ===== */
.site-footer {
  background: var(--primary);
  color: rgba(255,255,255,0.6);
  padding: 48px 20px 24px;
  margin-top: auto;
}
.footer-inner { max-width: 1200px; margin: 0 auto; }
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-brand .logo { margin-bottom: 12px; }
.footer-brand p { font-size: 0.87rem; line-height: 1.7; max-width: 280px; }
.footer-col h4 { font-family: var(--font-h); font-weight: 700; color: #fff; font-size: 0.9rem; margin-bottom: 14px; }
.footer-col a {
  display: block;
  color: rgba(255,255,255,0.55);
  font-size: 0.86rem;
  margin-bottom: 8px;
  transition: color var(--transition);
}
.footer-col a:hover { color: var(--accent); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.82rem;
}
.footer-bottom a { color: rgba(255,255,255,0.5); margin-left: 16px; }
.footer-bottom a:hover { color: var(--accent); }

/* ===== POLICY PAGES ===== */
.policy-page { max-width: 760px; margin: 40px auto; padding: 0 20px 60px; }
.policy-page h1 { font-family: var(--font-h); font-size: 2rem; font-weight: 800; margin-bottom: 8px; }
.policy-page .last-updated { color: var(--text2); font-size: 0.88rem; margin-bottom: 32px; }
.policy-page h2 { font-family: var(--font-h); font-size: 1.15rem; font-weight: 700; margin: 28px 0 10px; color: var(--text); }
.policy-page p, .policy-page li { color: var(--text2); font-size: 0.95rem; line-height: 1.8; margin-bottom: 10px; }
.policy-page ul { padding-left: 20px; }
.policy-page a { color: var(--accent2); }

/* ===== TOAST ===== */
.toast {
  position: fixed;
  bottom: 24px; left: 50%; transform: translateX(-50%) translateY(100px);
  background: var(--primary);
  color: #fff;
  padding: 12px 24px;
  border-radius: 50px;
  font-size: 0.9rem;
  font-weight: 600;
  z-index: 9999;
  transition: transform 0.3s ease;
  box-shadow: var(--shadow-lg);
  white-space: nowrap;
}
.toast.show { transform: translateX(-50%) translateY(0); }

/* ===== PROGRESS BAR ===== */
.progress-bar-wrap { background: rgba(255,255,255,0.1); border-radius: 6px; height: 8px; margin-top: 6px; overflow: hidden; }
.progress-bar { height: 100%; border-radius: 6px; background: linear-gradient(90deg, var(--accent), var(--accent2)); transition: width 0.6s ease; }

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .calc-grid { grid-template-columns: repeat(auto-fill, minmax(175px, 1fr)); }
}

@media (max-width: 700px) {
  .header-search { display: none; }
  .nav-links { display: none; }
  .hamburger { display: flex; }
  .form-row { grid-template-columns: 1fr; }
  .calc-hero { padding: 24px 20px; }
  .calc-body { padding: 20px 16px; }
  .result-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer-brand p { max-width: 100%; }
  .promo-card { flex-direction: column; align-items: flex-start; }

  /* Hero mobile */
  .hero { padding: 36px 16px 32px; }
  .hero h1 { font-size: 1.6rem; }
  .hero p { font-size: 0.9rem; margin-bottom: 20px; }
  .hero-search input { padding: 13px 50px 13px 18px; font-size: 0.9rem; }

  /* Category pills mobile — equal size all pills */
  .category-pills {
    padding: 12px 14px 0;
    gap: 8px;
    flex-wrap: wrap;
    overflow-x: visible;
  }
  .pill {
    flex: 1 1 calc(33.333% - 8px);
    min-width: 0;
    text-align: center;
    justify-content: center;
    font-size: 0.82rem;
    padding: 9px 8px;
    height: 40px;
  }

  /* Calc grid mobile - 2 columns */
  .calc-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
  .calc-card { padding: 16px 12px; gap: 6px; min-height: 100px; }
  .calc-icon { width: 36px; height: 36px; font-size: 1.1rem; border-radius: 10px; }
  .calc-name { font-size: 0.82rem; }
  .calc-desc { font-size: 0.74rem; color: var(--text2); }

  /* Section title */
  .section-title { font-size: 1rem; }

  /* Main wrap */
  .main-wrap { padding: 20px 14px 50px; }

  /* Result actions */
  .result-actions { gap: 8px; }
  .result-actions .btn { font-size: 0.8rem; padding: 9px 14px; }

  /* Footer */
  .footer-bottom { flex-direction: column; text-align: center; gap: 8px; }
  .footer-bottom a { margin-left: 8px; }
}

@media (max-width: 420px) {
  .calc-grid { grid-template-columns: 1fr 1fr; gap: 8px; }
  .calc-card { padding: 12px 10px; }
  .result-grid { grid-template-columns: 1fr; }
  .btn-group { flex-direction: column; }
  .hero h1 { font-size: 1.4rem; }
  .hero-search input { font-size: 0.85rem; }
  .header-inner { padding: 0 12px; gap: 8px; height: 56px; }
  .logo-icon { width: 32px; height: 32px; font-size: 1.2rem; }
  .logo-text { font-size: 0.95rem; }
  .logo { gap: 6px; }
  .hamburger { flex-shrink: 0; margin-left: 4px; }
}

/* Screenshot button */
.screenshot-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 16px;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 8px;
  color: rgba(255,255,255,0.8);
  font-size: 0.83rem;
  font-weight: 600;
  cursor: pointer;
  font-family: var(--font-b);
  transition: all var(--transition);
}
.screenshot-btn:hover { background: rgba(255,255,255,0.18); color: #fff; }

/* Contact form */
.contact-form { display: flex; flex-direction: column; gap: 18px; }
.contact-form .form-input { background: var(--bg); }
.contact-form textarea.form-input { resize: vertical; min-height: 120px; line-height: 1.6; }
.contact-success {
  display: none;
  background: rgba(0,201,167,0.1);
  border: 1px solid rgba(0,201,167,0.3);
  border-radius: var(--radius);
  padding: 20px;
  text-align: center;
  color: var(--accent);
  font-weight: 600;
}
.contact-success.show { display: block; }

/* Stats strip on homepage */
.stats-strip {
  background: var(--card);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 18px 20px;
}
.stats-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0;
  flex-wrap: nowrap;
}
.stats-inner .stat-item {
  flex: 1;
  border-right: 1px solid var(--border);
}
.stats-inner .stat-item:last-child { border-right: none; }
.stat-item { text-align: center; }
.stat-num {
  font-family: var(--font-h);
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--text);
}
.stat-num span { color: var(--accent2); }
.stat-label { font-size: 0.78rem; color: var(--text2); margin-top: 2px; }

@media (max-width: 500px) {
  .stats-strip { padding: 14px 8px; }
  .stat-num { font-size: 1rem; }
  .stat-label { font-size: 0.7rem; }
}

/* ===== UTILITY ===== */
.hidden { display: none !important; }
.text-accent { color: var(--accent); }
.text-accent2 { color: var(--accent2); }
.mt-4 { margin-top: 16px; }
.mt-6 { margin-top: 24px; }
.mb-4 { margin-bottom: 16px; }
.text-center { text-align: center; }
.divider { height: 1px; background: var(--border); margin: 24px 0; }

/* ===== LOADING SKELETON ===== */
.skeleton {
  background: linear-gradient(90deg, var(--bg2) 25%, var(--bg) 50%, var(--bg2) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: 8px;
}
@keyframes shimmer { 0% { background-position: 200% 0; } 100% { background-position: -200% 0; } }

/* ===== BACK TO TOP ===== */
#back-to-top {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 44px;
  height: 44px;
  background: var(--accent2);
  color: #fff;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  font-size: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(79,110,247,0.4);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition), transform var(--transition);
  z-index: 50;
}
#back-to-top.visible { opacity: 1; pointer-events: auto; }
#back-to-top:hover { transform: translateY(-2px); }