/* =========================================
   BILIN.CA — SHARED DESIGN SYSTEM
   ========================================= */

@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&family=Inter:wght@400;500;600&display=swap');

:root {
  --green:       #5A785F;
  --green-dark:  #3D5441;
  --green-light: #8AAF8F;
  --green-pale:  #EBF1EC;
  --dark:        #2B2E31;
  --mid:         #5A6068;
  --steel:       #E2E8E3;
  --bone:        #F7F8F5;
  --white:       #FFFFFF;
  --amber:       #D4881E;
  --amber-pale:  #FDF3E3;
  --red:         #C0392B;
  --radius:      10px;
  --radius-lg:   16px;
  --shadow:      0 2px 12px rgba(43,46,49,0.10);
  --shadow-lg:   0 8px 32px rgba(43,46,49,0.14);
  --transition:  0.18s ease;
}

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

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: 'Inter', system-ui, sans-serif;
  background: var(--bone);
  color: var(--dark);
  line-height: 1.6;
  min-height: 100vh;
}

h1, h2, h3, h4, h5 {
  font-family: 'Space Grotesk', system-ui, sans-serif;
  line-height: 1.2;
  font-weight: 700;
}

a { color: var(--green); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---- TOPNAV (DESKTOP DEFAULT) ---- */
.topnav {
  background: var(--white);
  border-bottom: 2px solid var(--steel);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(43,46,49,0.06);
}
.topnav-inner {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.logo-wrap { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.logo-wrap svg { height: 42px; width: auto; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
}
.nav-links a {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: var(--radius);
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--mid);
  transition: all var(--transition);
  font-family: 'Space Grotesk', sans-serif;
}
.nav-links a:hover, .nav-links a.active {
  background: var(--green-pale);
  color: var(--green-dark);
  text-decoration: none;
}
.nav-links a.active { font-weight: 600; }
.nav-icon { font-size: 1rem; }

/* Hidden Interaction Elements for Desktop */
.menu-checkbox,
.hamburger-btn {
  display: none;
}

/* ---- FOOTER ---- */
.site-footer {
  background: var(--dark);
  color: #aab5ac;
  margin-top: 64px;
  padding: 40px 24px 24px;
}
.footer-inner {
  max-width: 1160px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 32px;
}
.footer-brand p { font-size: 0.85rem; margin-top: 10px; max-width: 280px; line-height: 1.7; }
.footer-brand .logo-wrap svg .rest-text { fill: #fff; }
.footer-col h4 { color: var(--white); font-size: 0.85rem; font-family: 'Space Grotesk', sans-serif; margin-bottom: 12px; text-transform: uppercase; letter-spacing: 0.06em; }
.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul a { color: #aab5ac; font-size: 0.85rem; }
.footer-col ul a:hover { color: var(--green-light); }
.footer-bottom {
  max-width: 1160px;
  margin: 32px auto 0;
  padding-top: 20px;
  border-top: 1px solid rgba(255,255,255,0.1);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  color: #6e7d71;
}

/* ---- ADSENSE SLOTS ---- */
.ad-slot {
  background: var(--white);
  border: 1px dashed var(--steel);
  border-radius: var(--radius);
  padding: 8px;
  text-align: center;
  margin: 24px 0;
  overflow: hidden;
}
.ad-slot-leaderboard { min-height: 90px; }
.ad-slot-rectangle { min-height: 250px; max-width: 336px; }
.ad-slot-banner { min-height: 60px; }

/* ---- PAGE SHELL ---- */
.page-wrap {
  max-width: 1160px;
  margin: 0 auto;
  padding: 40px 24px;
}

/* ---- HERO STRIPE ---- */
.hero-stripe {
  background: var(--green-dark);
  position: relative;
  overflow: hidden;
  padding: 56px 24px 64px;
}
.hero-stripe::after {
  content: '';
  position: absolute;
  right: -60px;
  top: -30px;
  width: 420px;
  height: 420px;
  background: var(--green);
  border-radius: 50%;
  opacity: 0.18;
}
.hero-stripe::before {
  content: '';
  position: absolute;
  right: 120px;
  bottom: -80px;
  width: 260px;
  height: 260px;
  background: var(--amber);
  border-radius: 50%;
  opacity: 0.10;
}
.hero-inner {
  max-width: 1160px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,0.1);
  color: var(--green-light);
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 5px 12px;
  border-radius: 20px;
  margin-bottom: 18px;
}
.hero-stripe h1 { color: var(--white); font-size: clamp(2rem, 5vw, 3.4rem); margin-bottom: 16px; }
.hero-stripe p { color: rgba(255,255,255,0.75); font-size: 1.1rem; max-width: 560px; }

/* ---- TOOL CARD ---- */
.tool-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow);
  border: 1px solid var(--steel);
}
.tool-card h2 {
  font-size: 1.3rem;
  margin-bottom: 6px;
  color: var(--green-dark);
}
.tool-card .tool-desc {
  font-size: 0.9rem;
  color: var(--mid);
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--steel);
}

/* ---- FORMS ---- */
.form-grid { display: grid; gap: 16px; }
.form-grid-2 { grid-template-columns: 1fr 1fr; }
.form-grid-3 { grid-template-columns: 1fr 1fr 1fr; }

label {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--mid);
  margin-bottom: 5px;
  font-family: 'Space Grotesk', sans-serif;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

input, select, textarea {
  width: 100%;
  padding: 11px 14px;
  border: 1.5px solid var(--steel);
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-family: 'Inter', sans-serif;
  color: var(--dark);
  background: var(--white);
  transition: border-color var(--transition), box-shadow var(--transition);
  appearance: none;
}
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--green);
  box-shadow: 0 0 0 3px rgba(90,120,95,0.15);
}
input.error { border-color: var(--red); }
textarea { resize: vertical; min-height: 80px; }

.input-prefix { position: relative; }
.input-prefix span {
  position: absolute;
  left: 13px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--mid);
  font-size: 0.9rem;
  font-weight: 600;
  pointer-events: none;
}
.input-prefix input { padding-left: 28px; }

/* ---- BUTTONS ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-weight: 600;
  font-family: 'Space Grotesk', sans-serif;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
}
.btn-primary { background: var(--green); color: var(--white); }
.btn-primary:hover { background: var(--green-dark); transform: translateY(-1px); box-shadow: var(--shadow); }
.btn-secondary { background: var(--white); color: var(--green-dark); border: 1.5px solid var(--steel); }
.btn-secondary:hover { background: var(--green-pale); border-color: var(--green); }
.btn-amber { background: var(--amber); color: var(--white); }
.btn-amber:hover { background: #b8720f; transform: translateY(-1px); }
.btn-danger { background: var(--red); color: var(--white); }
.btn-sm { padding: 8px 16px; font-size: 0.85rem; }
.btn-lg { padding: 15px 28px; font-size: 1.05rem; }
.btn-block { width: 100%; justify-content: center; }

/* ---- RESULT BOX ---- */
.result-box {
  background: var(--green-pale);
  border: 2px solid var(--green-light);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-top: 24px;
}
.result-box .result-label {
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--green);
  font-family: 'Space Grotesk', sans-serif;
  margin-bottom: 4px;
}
.result-box .result-value {
  font-size: 2.4rem;
  font-weight: 700;
  font-family: 'Space Grotesk', sans-serif;
  color: var(--green-dark);
}

/* =========================================================
   FIXED MOBILE NAVIGATION ENGINE (CRITICAL OVERRIDES)
   ========================================================= */
/* =========================================================
   UNIVERSAL MOBILE NAVIGATION DROPDOWN ENGINE
   ========================================================= */

/* Ensure hidden interaction blocks stay hidden on desktop monitors */
.menu-checkbox,
.hamburger-btn {
  display: none !important;
}

@media (max-width: 768px) {
  .topnav-inner {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: space-between;
  }

  /* 1. COMPLETELY VAPORIZE THE BOX/SEARCH FIELD IN ALL MOBILE BROWSERS */
  input.menu-checkbox {
    display: block !important; 
    position: absolute !important;
    top: 10px !important;
    right: 24px !important;
    width: 44px !important;   /* Perfect touch dimension square */
    height: 44px !important;
    opacity: 0 !important;    /* 100% invisible but completely clickable */
    z-index: 120 !important;  /* Sits directly on top of the icon */
    cursor: pointer !important;
    margin: 0 !important;
    padding: 0 !important;
    appearance: none !important;
    -webkit-appearance: none !important; /* Forces iOS Safari to drop the search layout */
    border: none !important;
    background: none !important;
    box-shadow: none !important;
  }

  /* 2. THE VISUAL ICON LAYER BEHIND THE INVISIBLE CLICK TRACK */
  label.hamburger-btn {
    display: block !important;
    font-size: 1.8rem !important;
    color: var(--dark) !important;
    padding: 4px 10px !important;
    margin: 0 !important;
    text-transform: none !important;
    letter-spacing: normal !important;
    border-radius: var(--radius) !important;
    border: none !important;
    background: none !important;
    position: relative !important;
    z-index: 115 !important;
    pointer-events: none !important; /* Allows touches to pass through straight to our invisible box layer */
  }

  /* 3. DROPDOWN STACK MENU DRAWERS */
  .nav-links {
    display: none !important; /* Kept completely hidden until triggered */
    flex-direction: column !important;
    position: absolute !important;
    top: 64px !important; 
    left: 0 !important;
    right: 0 !important;
    width: 100% !important;
    background: var(--white) !important;
    border-bottom: 2px solid var(--steel) !important;
    padding: 16px 24px !important;
    box-shadow: var(--shadow-lg) !important;
    gap: 6px !important;
    z-index: 110 !important;
  }

  /* Expand target padding boxes for clumsy fingers on touch screen displays */
  .nav-links li,
  .nav-links a {
    width: 100% !important;
    display: flex !important;
  }
  .nav-links a {
    padding: 12px 16px !important;
  }

  /* 4. THE DRIVE STATE (Bulletproof fallback combinator) */
  input.menu-checkbox:checked ~ .nav-links,
  #menu-toggle:checked ~ .nav-links {
    display: flex !important;
  }
  
  /* Visual highlight when clicked */
  input.menu-checkbox:checked + label.hamburger-btn {
    background: var(--green-pale) !important;
    color: var(--green-dark) !important;
  }
}