/* ── DayCalc — Design System ── */
:root {
  --bg: #ffffff;
  --bg2: #f7f7f9;
  --bg3: #eeeef3;
  --border: rgba(0,0,0,0.08);
  --border-hover: rgba(0,0,0,0.18);
  --text: #111118;
  --text2: #4a4a62;
  --text3: #9090a8;
  --accent: #2563eb;
  --accent2: #7c3aed;
  --accent3: #e11d48;
  --font-head: 'Syne', sans-serif;
  --font-mono: 'DM Mono', monospace;
  --radius: 12px;
  --radius-lg: 20px;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1.6;
  min-height: 100vh;
}

.container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ── HEADER ── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.9);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}
.site-header .container {
  display: flex;
  align-items: center;
  height: 60px;
  gap: 32px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  flex-shrink: 0;
}
.logo-icon {
  color: var(--accent);
  font-size: 20px;
  line-height: 1;
}
.logo-text {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 18px;
  color: var(--text);
  letter-spacing: -0.02em;
}
.nav {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
}
.nav a {
  color: var(--text2);
  text-decoration: none;
  font-size: 13px;
  padding: 6px 12px;
  border-radius: 8px;
  transition: all 0.15s;
  white-space: nowrap;
}
.nav a:hover { color: var(--text); background: var(--bg3); }
.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  color: var(--text);
  padding: 6px 10px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 16px;
  margin-left: auto;
}

/* ── HERO ── */
.hero {
  position: relative;
  padding: 80px 0 72px;
  overflow: hidden;
}
.hero-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent);
  background: rgba(37,99,235,0.07);
  border: 1px solid rgba(37,99,235,0.18);
  padding: 5px 14px;
  border-radius: 20px;
  margin-bottom: 24px;
  letter-spacing: 0.03em;
}
.hero-title {
  font-family: var(--font-head);
  font-size: clamp(52px, 8vw, 96px);
  font-weight: 800;
  line-height: 0.95;
  letter-spacing: -0.04em;
  margin-bottom: 24px;
  color: var(--text);
}
.hero-title em {
  font-style: normal;
  color: var(--accent);
}
.hero-sub {
  font-size: 17px;
  color: var(--text2);
  max-width: 480px;
  margin-bottom: 36px;
  line-height: 1.7;
}
.hero-ticker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--bg3);
  border: 1px solid var(--border);
  padding: 12px 20px;
  border-radius: var(--radius);
  font-size: 13px;
  flex-wrap: wrap;
}
.ticker-label { color: var(--text3); }
.ticker-date { color: var(--text); font-weight: 500; }
.ticker-num { color: var(--accent); font-weight: 500; }
.ticker-sep { color: var(--border-hover); }

/* hero bg rings */
.hero-bg { position: absolute; top: 0; right: -10%; width: 55%; height: 100%; pointer-events: none; }
.hero-ring {
  position: absolute;
  border-radius: 50%;
  border: 1px solid var(--border);
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
}
.r1 { width: 300px; height: 300px; }
.r2 { width: 500px; height: 500px; border-color: rgba(37,99,235,0.06); }
.r3 { width: 700px; height: 700px; }

/* ── TOOLS GRID ── */
.tools-grid-section { padding: 16px 0 80px; }
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 12px;
}
.tool-card {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  text-decoration: none;
  color: var(--text);
  transition: all 0.2s;
  position: relative;
  overflow: hidden;
}
.tool-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(37,99,235,0.03) 0%, transparent 60%);
  opacity: 0;
  transition: opacity 0.2s;
}
.tool-card:hover { border-color: var(--border-hover); transform: translateY(-2px); box-shadow: 0 8px 32px rgba(0,0,0,0.08); }
.tool-card:hover::before { opacity: 1; }
.tool-card.featured { grid-column: span 1; border-color: rgba(37,99,235,0.2); }
.tool-card.featured::before { opacity: 1; }
.tc-icon {
  font-size: 22px;
  width: 44px;
  height: 44px;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--accent);
  font-family: var(--font-mono);
}
.tc-body { flex: 1; }
.tc-name {
  font-family: var(--font-head);
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--text);
}
.tc-desc { font-size: 13px; color: var(--text2); line-height: 1.5; }
.tc-arrow {
  color: var(--text3);
  font-size: 18px;
  transition: all 0.2s;
  flex-shrink: 0;
  align-self: center;
}
.tool-card:hover .tc-arrow { color: var(--accent); transform: translateX(4px); }

/* ── FAQ ── */
.faq-section { padding: 0 0 80px; }
.section-title {
  font-family: var(--font-head);
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 32px;
  color: var(--text);
}
.faq-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(440px, 1fr));
  gap: 16px;
}
.faq-item {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}
.faq-item h3 {
  font-family: var(--font-head);
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--text);
}
.faq-item p { font-size: 13px; color: var(--text2); line-height: 1.6; }
.faq-item a { color: var(--accent); text-decoration: none; }
.faq-item a:hover { text-decoration: underline; }

/* ── FOOTER ── */
.site-footer {
  background: var(--bg2);
  border-top: 1px solid var(--border);
  padding: 48px 0 24px;
}
.footer-top {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 48px;
  margin-bottom: 40px;
  align-items: start;
}
.footer-brand .logo-icon { font-size: 18px; }
.footer-brand .logo-text { font-family: var(--font-head); font-weight: 800; font-size: 16px; }
.footer-brand p { font-size: 13px; color: var(--text3); margin-top: 10px; max-width: 280px; line-height: 1.6; }
.footer-links { display: flex; gap: 48px; }
.fl-col { display: flex; flex-direction: column; gap: 10px; }
.fl-col strong { font-family: var(--font-head); font-size: 13px; color: var(--text); margin-bottom: 4px; }
.fl-col a { font-size: 13px; color: var(--text3); text-decoration: none; transition: color 0.15s; }
.fl-col a:hover { color: var(--text); }
.footer-bottom { border-top: 1px solid var(--border); padding-top: 20px; }
.footer-bottom p { font-size: 12px; color: var(--text3); }

/* ── TOOL PAGE LAYOUT ── */
.tool-page { padding: 48px 0 80px; }
.tool-page-header { margin-bottom: 40px; }
.breadcrumb { font-size: 12px; color: var(--text3); margin-bottom: 16px; }
.breadcrumb a { color: var(--text3); text-decoration: none; }
.breadcrumb a:hover { color: var(--accent); }
.tool-page-title {
  font-family: var(--font-head);
  font-size: clamp(32px, 5vw, 52px);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text);
  margin-bottom: 10px;
}
.tool-page-desc { font-size: 16px; color: var(--text2); max-width: 560px; }

/* Calculator card */
.calc-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px;
  max-width: 680px;
  margin-bottom: 40px;
}
.calc-card h2 {
  font-family: var(--font-head);
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 28px;
  color: var(--text);
}

/* Form elements */
.form-group { margin-bottom: 24px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
label {
  display: block;
  font-size: 12px;
  font-weight: 500;
  color: var(--text3);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 8px;
}
input[type="date"],
input[type="number"],
input[type="time"],
input[type="text"],
select {
  width: 100%;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 15px;
  padding: 12px 16px;
  outline: none;
  transition: border-color 0.15s;
  appearance: none;
  -webkit-appearance: none;
}
input:focus, select:focus { border-color: rgba(37,99,235,0.5); }
select { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%239090a8' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 14px center; padding-right: 40px; cursor: pointer; }

.btn {
  background: var(--accent);
  color: #ffffff;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 15px;
  border: none;
  border-radius: var(--radius);
  padding: 14px 28px;
  cursor: pointer;
  transition: all 0.15s;
  width: 100%;
}
.btn:hover { background: #1d4ed8; transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

/* Result box */
.result-box {
  background: #f0f4ff;
  border: 1px solid rgba(37,99,235,0.2);
  border-radius: var(--radius);
  padding: 28px;
  margin-top: 24px;
  display: none;
}
.result-box.show { display: block; animation: fadeIn 0.25s ease; }
@keyframes fadeIn { from { opacity:0; transform: translateY(8px); } to { opacity:1; transform: translateY(0); } }
.result-primary {
  font-family: var(--font-head);
  font-size: clamp(40px, 8vw, 64px);
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 8px;
}
.result-label { font-size: 14px; color: var(--text2); margin-bottom: 20px; }
.result-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); gap: 10px; margin-top: 20px; }
.result-cell {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
}
.result-cell-val { font-family: var(--font-head); font-size: 22px; font-weight: 700; color: var(--text); }
.result-cell-label { font-size: 11px; color: var(--text3); margin-top: 2px; text-transform: uppercase; letter-spacing: 0.06em; }

/* Quick picks (Days Until) */
.quick-picks { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 20px; }
.qp-btn {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text2);
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 6px 14px;
  cursor: pointer;
  transition: all 0.15s;
}
.qp-btn:hover { border-color: var(--accent); color: var(--accent); background: rgba(37,99,235,0.05); }

/* Related tools */
.related-tools { margin-top: 48px; }
.related-tools h3 { font-family: var(--font-head); font-size: 20px; font-weight: 700; margin-bottom: 16px; }
.related-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 10px; }
.related-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 20px;
  text-decoration: none;
  color: var(--text);
  font-size: 14px;
  transition: all 0.15s;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.related-card:hover { border-color: var(--border-hover); color: var(--accent); }

/* SEO content */
.seo-content {
  max-width: 720px;
  margin-top: 48px;
  padding-top: 48px;
  border-top: 1px solid var(--border);
}
.seo-content h2 { font-family: var(--font-head); font-size: 24px; font-weight: 700; margin-bottom: 14px; }
.seo-content p { font-size: 14px; color: var(--text2); line-height: 1.8; margin-bottom: 20px; }

/* Ad placeholder */
.ad-slot {
  background: var(--bg2);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  min-height: 90px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  color: var(--text3);
  margin: 32px 0;
}

/* ── RESPONSIVE ── */
@media (max-width: 768px) {
  .nav { display: none; flex-direction: column; position: absolute; top: 60px; left: 0; right: 0; background: var(--bg); border-bottom: 1px solid var(--border); padding: 16px; }
  .nav.open { display: flex; }
  .nav-toggle { display: block; }
  .hero { padding: 56px 0 48px; }
  .hero-bg { display: none; }
  .footer-top { grid-template-columns: 1fr; }
  .footer-links { flex-wrap: wrap; gap: 32px; }
  .form-row { grid-template-columns: 1fr; }
  .faq-grid { grid-template-columns: 1fr; }
  .calc-card { padding: 24px; }
}

/* Countdown specific */
.countdown-display {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-top: 24px;
}
.countdown-unit {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 12px;
  text-align: center;
}
.countdown-num {
  font-family: var(--font-head);
  font-size: clamp(28px, 5vw, 48px);
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
}
.countdown-label { font-size: 11px; color: var(--text3); margin-top: 6px; text-transform: uppercase; letter-spacing: 0.08em; }