/* ============================================================
   Contractor Theme CSS
   Focus: High converting orange & dark charcoal
============================================================ */

:root {
  --bg-dark: #121212;
  --bg-card: #1f1f1f;
  --bg-lighter: #2c2c2c;
  
  --accent: #ff6b00; /* Safety Orange */
  --accent-glow: rgba(255, 107, 0, 0.4);
  
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --border-light: rgba(255, 255, 255, 0.08);

  --font-sans: 'Inter', system-ui, sans-serif;
  --font-display: 'Barlow Condensed', sans-serif; /* Needs an import in HTML */
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: var(--font-sans);
  background-color: var(--bg-dark);
  color: var(--text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  padding-top: 80px; /* nav padding */
}

/* ── NAV BAR ───────────── */
.site-nav {
  position: fixed; top: 0; left: 0; width: 100%; height: 80px;
  background: rgba(18, 18, 18, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 2px solid var(--accent); /* strong brand edge */
  z-index: 1000;
}
.nav-inner {
  max-width: 1200px; margin: 0 auto; height: 100%;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 20px; position: relative;
}
.nav-logo {
  display: flex; align-items: center; gap: 8px;
  text-decoration: none; color: #fff; font-weight: 800; font-size: 1.4rem;
}
.nav-logo-icon { color: var(--accent); font-size: 1.8rem; }
.nav-tools-wrap { position: relative; }
.nav-tools-btn {
  background: transparent; color: #fff; border: none; font-size: 1rem;
  font-weight: 600; cursor: pointer; padding: 10px 15px; border-radius: 6px;
  display: flex; align-items: center; gap: 6px; font-family: var(--font-sans);
}
.nav-tools-btn:hover { background: var(--bg-lighter); }
.nav-dropdown {
  position: absolute; top: calc(100% + 10px); right: 0;
  width: 300px; background: var(--bg-card);
  border: 1px solid var(--border-light); border-radius: 8px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.5);
  opacity: 0; visibility: hidden; transform: translateY(-10px);
  transition: all 0.2s ease; display: grid; grid-template-columns: 1fr;
}
.nav-dropdown.open { opacity: 1; visibility: visible; transform: translateY(0); }
.nav-dropdown a {
  padding: 14px 20px; color: var(--text-main); text-decoration: none;
  font-weight: 500; font-size: 0.95rem; border-bottom: 1px solid var(--border-light);
  display: flex; align-items: center; gap: 10px;
}
.nav-dropdown a:last-child { border-bottom: none; }
.nav-dropdown a:hover, .nav-dropdown a.active {
  background: var(--bg-lighter); color: var(--accent);
}
.nav-hamburger {
  display: none; background: none; border: none;
  color: #fff; font-size: 1.5rem; cursor: pointer;
}

@media (max-width: 768px) {
  .nav-tools-btn { display: none; }
  .nav-hamburger { display: block; }
  .nav-dropdown { width: 100vw; top: 80px; left: 0; border: none; border-radius: 0; }
}

/* ── LAYOUT / GRIDS ──────── */
.container { max-width: 1100px; margin: 0 auto; padding: 40px 20px; }
.page-hero {
  text-align: center; padding: 60px 20px 40px;
  background: radial-gradient(circle at top, rgba(255,107,0,0.1) 0%, transparent 60%);
}
.badge {
  display: inline-block; background: rgba(255,107,0,0.15);
  color: var(--accent); padding: 4px 12px; border-radius: 30px;
  font-size: 0.85rem; font-weight: 700; margin-bottom: 15px;
  text-transform: uppercase; letter-spacing: 1px;
}
h1 { font-family: var(--font-display); font-size: 3.5rem; line-height: 1.1; margin-bottom: 15px; letter-spacing: -1px; }
h2 { font-family: var(--font-display); font-size: 2.2rem; margin-bottom: 20px; letter-spacing: -0.5px;}
.hero-sub { font-size: 1.2rem; color: var(--text-muted); max-width: 600px; margin: 0 auto; }
.accent { color: var(--accent); }

/* 工具 Grid */
.tools-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 24px;
}
.tool-card {
  background: var(--bg-card); border: 1px solid var(--border-light);
  border-radius: 12px; padding: 30px; text-decoration: none;
  color: var(--text-main); transition: all 0.2s ease;
  display: flex; flex-direction: column; position: relative;
  overflow: hidden;
}
.tool-card:hover { transform: translateY(-5px); border-color: var(--accent); box-shadow: 0 10px 25px rgba(0,0,0,0.3); }
.tool-card-icon { font-size: 2.5rem; margin-bottom: 20px; }
.tool-card-title { font-size: 1.3rem; font-weight: 700; margin-bottom: 10px; }
.tool-card-desc { color: var(--text-muted); font-size: 0.95rem; margin-bottom: 20px; flex-grow: 1; }
.tool-card-btn {
  background: var(--accent); color: #121212; font-weight: 700;
  text-align: center; padding: 10px; border-radius: 6px; transition: 0.2s;
}
.tool-card:hover .tool-card-btn { background: #e66000; }

/* ── FORMS & CARDS ──────── */
.calc-card, .results-card {
  background: var(--bg-card); border: 1px solid var(--border-light);
  border-radius: 12px; padding: 40px; margin: 0 auto 50px; max-width: 800px;
}
.form-group { margin-bottom: 25px; }
.form-group label {
  display: block; font-weight: 600; margin-bottom: 8px; font-size: 0.95rem;
}
.input-wrap { display: flex; align-items: center; border-radius: 6px; background: var(--bg-dark); border: 1px solid var(--border-light); }
.input-wrap:focus-within { border-color: var(--accent); }
.input-wrap span { padding: 0 15px; color: var(--text-muted); }
.form-group input, .form-group select {
  width: 100%; border: none; background: transparent; color: #fff;
  padding: 14px; font-size: 1.05rem; font-family: var(--font-sans); outline: none;
}
.btn-primary {
  width: 100%; display: inline-block; background: var(--accent); color: #121212;
  font-family: var(--font-sans); font-size: 1.1rem; font-weight: 800;
  border: none; padding: 18px; border-radius: 6px; cursor: pointer; transition: 0.2s;
  text-transform: uppercase; letter-spacing: 1px;
}
.btn-primary:hover { background: #e66000; }
.btn-secondary {
  width: 100%; display: block; background: var(--bg-lighter); color: #fff;
  font-size: 1rem; font-weight: 600; border: none; padding: 14px; border-radius: 6px; cursor: pointer; margin-top: 15px;
}
.btn-secondary:hover { background: #3c3c3c; }

/* ── RESULTS ────────────── */
#results { display: none; }
.res-hero {
  text-align: center; margin-bottom: 40px; padding: 30px;
  background: rgba(255,107,0,0.1); border: 1px solid var(--accent); border-radius: 8px;
}
.res-hero h3 { font-size: 1rem; color: var(--accent); text-transform: uppercase; margin-bottom: 5px; }
.res-figure { font-family: var(--font-display); font-size: 4rem; color: #fff; line-height: 1; }
.data-row {
  display: flex; justify-content: space-between; padding: 15px 0;
  border-bottom: 1px solid var(--border-light); font-size: 1.05rem;
}
.data-row:last-child { border-bottom: none; }
.data-row strong { color: #fff; }

/* ── AD SLOTS ───────────── */
.ad-slot {
  background: var(--bg-lighter); border: 2px dashed rgba(255,255,255,0.1);
  color: var(--text-muted); display: flex; align-items: center; justify-content: center;
  margin: 30px auto; overflow: hidden; font-size: 0.9rem; text-transform: uppercase; letter-spacing: 1px;
}
.ad-leaderboard { width: 100%; max-width: 970px; height: 90px; }
.ad-rect { width: 300px; height: 250px; }

/* ── FOOTER ─────────────── */
.site-footer {
  background: #0f0f0f; border-top: 1px solid var(--border-light);
  padding: 60px 20px 30px; margin-top: 60px;
}
.footer-inner { max-width: 1100px; margin: 0 auto; }
.footer-top { display: flex; flex-wrap: wrap; gap: 40px; justify-content: space-between; margin-bottom: 40px; }
.footer-col { flex: 1; min-width: 200px; }
.footer-col h4 { font-family: var(--font-display); font-size: 1.3rem; margin-bottom: 20px; color: #fff; }
.footer-col a { display: block; color: var(--text-muted); text-decoration: none; margin-bottom: 10px; transition: 0.2s; }
.footer-col a:hover { color: var(--accent); }
.footer-bottom {
  text-align: center; color: var(--text-muted); font-size: 0.85rem;
  padding-top: 30px; border-top: 1px solid var(--border-light);
}

.fade-in { opacity: 0; transform: translateY(20px); transition: 0.6s ease; }
.fade-in.visible { opacity: 1; transform: translateY(0); }