/* ============================================
   WordSearch Solver — Main Stylesheet
   Educational · Warm · Playful · Sophisticated
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Fraunces:ital,opsz,wght@0,9..144,400;0,9..144,600;0,9..144,700;1,9..144,400&family=Plus+Jakarta+Sans:wght@400;500;600;700&family=JetBrains+Mono:wght@400;600&display=swap');

/* ===== TOKENS ===== */
:root {
  --cream: #fdf6ec;
  --warm-white: #fffaf4;
  --amber: #f4a261;
  --amber-dark: #e07b39;
  --teal: #2a9d8f;
  --teal-light: #52b8ac;
  --teal-dark: #1f7a6e;
  --navy: #264653;
  --coral: #e76f51;
  --gold: #e9c46a;
  --ink: #1a1a2e;
  --text: #2d3436;
  --text-muted: #636e72;
  --text-light: #b2bec3;
  --border: #e8d9c4;
  --shadow-sm: 0 2px 8px rgba(38,70,83,0.08);
  --shadow-md: 0 6px 24px rgba(38,70,83,0.12);
  --shadow-lg: 0 16px 48px rgba(38,70,83,0.16);
  --radius: 14px;
  --radius-lg: 24px;
  --font-display: 'Fraunces', serif;
  --font-body: 'Plus Jakarta Sans', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --max-w: 1200px;
  --header-h: 72px;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== RESET ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-body);
  background: var(--cream);
  color: var(--text);
  line-height: 1.65;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: var(--font-body); cursor: pointer; border: none; }
ul { list-style: none; }

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--cream); }
::-webkit-scrollbar-thumb { background: var(--amber); border-radius: 4px; }

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4 { font-family: var(--font-display); line-height: 1.2; color: var(--navy); }

/* ===== BACKGROUND TEXTURE ===== */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 20%, rgba(244,162,97,0.08) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(42,157,143,0.08) 0%, transparent 50%),
    url("data:image/svg+xml,%3Csvg width='60' height='60' xmlns='http://www.w3.org/2000/svg'%3E%3Ccircle cx='30' cy='30' r='1' fill='%23264653' opacity='.04'/%3E%3C/svg%3E");
  pointer-events: none;
  /* FIX: Ensure background is physically behind everything */
  z-index: -1; 
}

/* ===== HEADER ===== */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-h);
  /* FIX: Explicitly high z-index and hardware acceleration to stay on top */
  z-index: 1000 !important;
  transform: translateZ(0); 
  transition: background var(--transition), box-shadow var(--transition);
  background: rgba(253,246,236,0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  pointer-events: auto;
}
.site-header.scrolled {
  background: rgba(253,246,236,0.97);
  box-shadow: var(--shadow-sm);
  border-bottom-color: var(--border);
}
.header-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  gap: 32px;
  /* FIX: Inner content must capture clicks */
  position: relative;
  z-index: 1001;
  pointer-events: auto;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  text-decoration: none;
}
.logo-icon {
  width: 40px; height: 40px;
  background: var(--navy);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1px;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 13px;
  transition: transform var(--transition);
}
.logo-icon span:first-child { color: var(--amber); }
.logo-icon span:last-child { color: var(--teal-light); }
.logo:hover .logo-icon { transform: rotate(-5deg) scale(1.05); }
.logo-text { display: flex; flex-direction: column; line-height: 1; }
.logo-main { font-family: var(--font-display); font-weight: 700; font-size: 16px; color: var(--navy); }
.logo-sub { font-size: 11px; color: var(--amber-dark); font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; }

.main-nav { margin-left: auto; }
.main-nav ul { display: flex; gap: 6px; }
.main-nav a {
  padding: 6px 14px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-muted);
  border-radius: 8px;
  transition: color var(--transition), background var(--transition);
}
.main-nav a:hover, .main-nav a.active {
  color: var(--navy);
  background: rgba(244,162,97,0.12);
}

.btn-solve-now {
  background: var(--navy);
  color: white;
  padding: 9px 20px;
  border-radius: 50px;
  font-size: 14px;
  font-weight: 600;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
  white-space: nowrap;
}
.btn-solve-now:hover {
  background: var(--teal-dark);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(38,70,83,0.25);
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  background: none;
  border-radius: 8px;
}
.hamburger span {
  display: block;
  width: 22px; height: 2px;
  background: var(--navy);
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}
.hamburger.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mobile-nav {
  display: none;
  position: fixed;
  top: var(--header-h);
  left: 0; right: 0;
  background: var(--warm-white);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-md);
  /* FIX: Ensure mobile nav is below the header line but above content */
  z-index: 900;
  transform: translateY(-100%);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  padding: 16px 24px 24px;
}
.mobile-nav.open { transform: translateY(0); }
.mobile-nav ul { display: flex; flex-direction: column; gap: 4px; }
.mobile-nav a { display: block; padding: 12px 16px; font-weight: 500; border-radius: 10px; color: var(--navy); font-size: 15px; }
.mobile-nav a:hover { background: rgba(244,162,97,0.12); }

/* ===== MAIN WRAPPER ===== */
main { 
  padding-top: var(--header-h);
  position: relative;
  /* FIX: Isolate main content so its internal z-indexes don't leak to header */
  z-index: 1;
  isolation: isolate; 
}

/* ===== SECTION SHARED ===== */
.section { padding: 80px 24px; position: relative; }
.section-inner { max-width: var(--max-w); margin: 0 auto; }
.section-label {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--amber-dark);
  background: rgba(244,162,97,0.15);
  padding: 5px 14px;
  border-radius: 50px;
  margin-bottom: 16px;
}
.section-title {
  font-size: clamp(28px, 4vw, 44px);
  margin-bottom: 16px;
}
.section-desc {
  font-size: 17px;
  color: var(--text-muted);
  max-width: 600px;
  line-height: 1.7;
}

/* ===== HERO ===== */
.hero {
  min-height: calc(100vh - var(--header-h));
  display: flex;
  align-items: center;
  padding: 60px 24px;
  position: relative;
  overflow: hidden;
  /* FIX: Keep hero below header even during animations */
  z-index: 1;
}
.hero::before {
  content: '';
  position: absolute;
  top: -100px; right: -100px;
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(244,162,97,0.15) 0%, transparent 70%);
  pointer-events: none;
  z-index: -1;
}
.hero::after {
  content: '';
  position: absolute;
  bottom: -100px; left: -100px;
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(42,157,143,0.12) 0%, transparent 70%);
  pointer-events: none;
  z-index: -1;
}
.hero-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(42,157,143,0.12);
  color: var(--teal-dark);
  padding: 7px 16px;
  border-radius: 50px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 24px;
  border: 1px solid rgba(42,157,143,0.2);
  animation: fadeInDown 0.6s ease both;
}
.hero-badge .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--teal); animation: pulse-dot 2s infinite; }
@keyframes pulse-dot { 0%,100%{opacity:1;transform:scale(1)}50%{opacity:.5;transform:scale(1.4)} }

.hero h1 {
  font-size: clamp(38px, 5.5vw, 68px);
  line-height: 1.08;
  margin-bottom: 20px;
  animation: fadeInUp 0.7s ease 0.1s both;
}
.hero h1 em { font-style: italic; color: var(--amber-dark); }
.hero h1 .highlight {
  display: inline-block;
  background: linear-gradient(135deg, var(--teal), var(--teal-dark));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-desc {
  font-size: 18px;
  color: var(--text-muted);
  margin-bottom: 36px;
  line-height: 1.7;
  animation: fadeInUp 0.7s ease 0.2s both;
}
.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  animation: fadeInUp 0.7s ease 0.3s both;
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--navy);
  color: white;
  padding: 14px 28px;
  border-radius: 50px;
  font-size: 15px;
  font-weight: 600;
  transition: transform var(--transition), box-shadow var(--transition);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 32px rgba(38,70,83,0.3); }
.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  color: var(--navy);
  padding: 14px 28px;
  border-radius: 50px;
  font-size: 15px;
  font-weight: 600;
  border: 2px solid var(--border);
  transition: border-color var(--transition), background var(--transition);
}
.btn-secondary:hover { border-color: var(--amber); background: rgba(244,162,97,0.06); }

.hero-trust {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 32px;
  font-size: 13px;
  color: var(--text-muted);
  animation: fadeInUp 0.7s ease 0.4s both;
}
.trust-items { display: flex; gap: 16px; flex-wrap: wrap; }
.trust-item { display: flex; align-items: center; gap: 5px; }

/* Hero Visual — animated grid */
.hero-visual { 
  animation: fadeInRight 0.8s ease 0.2s both; 
  position: relative;
  z-index: 2;
}
.demo-grid-wrap {
  background: white;
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border);
  position: relative;
}
.demo-grid-wrap::before {
  content: 'PREVIEW';
  position: absolute;
  top: 14px; right: 18px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--text-light);
}
.demo-grid {
  display: grid;
  grid-template-columns: repeat(10, 1fr);
  gap: 4px;
  margin-bottom: 18px;
}
.demo-cell {
  width: 32px; height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  border-radius: 6px;
  color: var(--text-muted);
  background: var(--cream);
  transition: all 0.3s;
}
.demo-cell.lit {
  color: white;
  animation: cellLit 3s ease-in-out infinite;
}
@keyframes cellLit { 0%,100%{transform:scale(1)}50%{transform:scale(1.1)} }
.demo-words {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.demo-word {
  padding: 4px 10px;
  border-radius: 50px;
  font-size: 11px;
  font-weight: 600;
  color: white;
  animation: fadeIn 0.5s ease both;
}

/* ===== SOLVER SECTION ===== */
#solver {
  background: var(--warm-white);
  padding: 80px 24px;
}
.solver-inner { max-width: 1100px; margin: 0 auto; }
.solver-header { text-align: center; margin-bottom: 48px; }
.solver-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 32px;
  align-items: start;
}
.solver-main { display: flex; flex-direction: column; gap: 20px; }

.input-group { display: flex; flex-direction: column; gap: 8px; }
.input-label {
  font-size: 13px;
  font-weight: 700;
  color: var(--navy);
  letter-spacing: 0.03em;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 8px;
}
.input-label-hint {
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 400;
  text-transform: none;
  letter-spacing: 0;
}
.grid-input-wrap { position: relative; }
textarea {
  width: 100%;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.7;
  padding: 16px 18px;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  background: white;
  color: var(--text);
  resize: vertical;
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}
textarea:focus {
  border-color: var(--teal);
  box-shadow: 0 0 0 4px rgba(42,157,143,0.12);
}
textarea::placeholder { color: var(--text-light); }
#grid-input { min-height: 240px; letter-spacing: 0.05em; }
#words-input { min-height: 140px; }
.grid-info-tag {
  position: absolute;
  top: 12px; right: 12px;
  font-size: 11px;
  font-weight: 600;
  color: var(--teal-dark);
  background: rgba(42,157,143,0.12);
  padding: 3px 10px;
  border-radius: 50px;
}

.solver-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.btn-solve {
  flex: 1;
  background: linear-gradient(135deg, var(--navy), var(--teal-dark));
  color: white;
  padding: 14px 32px;
  border-radius: 50px;
  font-size: 16px;
  font-weight: 700;
  transition: transform var(--transition), box-shadow var(--transition), opacity var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 52px;
  position: relative;
  overflow: hidden;
}
.btn-solve::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.1), transparent);
}
.btn-solve:hover:not(:disabled) { transform: translateY(-2px); box-shadow: 0 12px 32px rgba(38,70,83,0.35); }
.btn-solve:disabled { opacity: 0.7; transform: none; }
.btn-solve.loading .btn-text { opacity: 0; }
.btn-solve.loading::before {
  content: '';
  position: absolute;
  width: 22px; height: 22px;
  border: 3px solid rgba(255,255,255,0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.btn-clear {
  background: transparent;
  color: var(--text-muted);
  padding: 14px 22px;
  border-radius: 50px;
  font-size: 15px;
  font-weight: 600;
  border: 2px solid var(--border);
  transition: all var(--transition);
}
.btn-clear:hover { border-color: var(--coral); color: var(--coral); }
.btn-sample {
  background: rgba(244,162,97,0.12);
  color: var(--amber-dark);
  padding: 14px 22px;
  border-radius: 50px;
  font-size: 15px;
  font-weight: 600;
  transition: all var(--transition);
}
.btn-sample:hover { background: rgba(244,162,97,0.22); }

/* Solver Sidebar */
.solver-sidebar { display: flex; flex-direction: column; gap: 16px; }
.sidebar-card {
  background: white;
  border-radius: var(--radius);
  padding: 20px;
  border: 1px solid var(--border);
}
.sidebar-card h4 {
  font-size: 13px;
  font-weight: 700;
  color: var(--navy);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 12px;
}
.format-example {
  background: var(--cream);
  border-radius: 10px;
  padding: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.8;
}
.directions-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}
.dir-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--text-muted);
}
.dir-arrow {
  width: 26px; height: 26px;
  background: rgba(42,157,143,0.1);
  color: var(--teal-dark);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  flex-shrink: 0;
}

/* ===== RESULTS ===== */
#results-section {
  max-width: 1100px;
  margin: 0 auto;
  padding: 32px 24px;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.4s ease, transform 0.4s ease;
  pointer-events: none;
}
#results-section.visible {
  opacity: 1;
  transform: none;
  pointer-events: auto;
}
.results-header {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}
.results-header h2 {
  font-size: 26px;
  margin: 0;
}
.results-stats { display: flex; gap: 8px; flex-wrap: wrap; }
.stat {
  padding: 4px 12px;
  border-radius: 50px;
  font-size: 13px;
  font-weight: 600;
  background: rgba(38,70,83,0.07);
  color: var(--navy);
}
.found-stat { background: rgba(42,157,143,0.12); color: var(--teal-dark); }
.not-found-stat { background: rgba(231,111,81,0.12); color: var(--coral); }
.btn-copy {
  margin-left: auto;
  background: white;
  border: 1.5px solid var(--border);
  padding: 7px 16px;
  border-radius: 50px;
  font-size: 13px;
  font-weight: 600;
  color: var(--navy);
  transition: all var(--transition);
}
.btn-copy:hover { border-color: var(--amber); background: rgba(244,162,97,0.08); }
.summary-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
  padding: 16px;
  background: white;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}
.word-tag {
  padding: 5px 14px;
  border-radius: 50px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.03em;
}
.found-tag {
  background: color-mix(in srgb, var(--wc, #2a9d8f) 15%, white);
  color: color-mix(in srgb, var(--wc, #2a9d8f) 80%, #000);
  border: 1.5px solid color-mix(in srgb, var(--wc, #2a9d8f) 30%, white);
}
.not-found-tag { background: rgba(231,111,81,0.1); color: var(--coral); border: 1.5px solid rgba(231,111,81,0.2); }

.results-body {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 28px;
  align-items: start;
}
.grid-section h3, .list-section h3 {
  font-size: 17px;
  margin-bottom: 16px;
}
.grid-scroll-wrapper {
  overflow-x: auto;
  padding-bottom: 8px;
}
.word-grid-display {
  display: inline-flex;
  flex-direction: column;
  gap: 3px;
  background: white;
  border-radius: var(--radius);
  padding: 16px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}
.grid-row { display: flex; gap: 3px; }
.grid-cell {
  width: 34px; height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  border-radius: 6px;
  color: var(--text-muted);
  background: var(--cream);
  transition: all 0.2s;
  user-select: none;
  cursor: default;
}
.grid-cell.highlighted {
  color: white;
  background: var(--wc, #2a9d8f);
  box-shadow: 0 2px 8px color-mix(in srgb, var(--wc, #2a9d8f) 40%, transparent);
}
.grid-cell.dim { opacity: 0.25; }
.grid-cell.focus {
  transform: scale(1.1);
  z-index: 1;
  box-shadow: 0 4px 12px color-mix(in srgb, var(--wc, #2a9d8f) 50%, transparent);
}
.grid-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}
.legend-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 50px;
  font-size: 12px;
  font-weight: 700;
  background: color-mix(in srgb, var(--wc, #2a9d8f) 12%, white);
  color: color-mix(in srgb, var(--wc, #2a9d8f) 90%, #000);
}
.legend-item::before { content: ''; width: 8px; height: 8px; border-radius: 50%; background: var(--wc, #2a9d8f); }

.word-result-group {
  background: white;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  overflow: hidden;
  margin-bottom: 10px;
}
.word-result-label {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--navy);
  background: color-mix(in srgb, var(--wc, #2a9d8f) 8%, white);
  border-bottom: 1px solid color-mix(in srgb, var(--wc, #2a9d8f) 15%, white);
}
.word-result-label .dot { width: 10px; height: 10px; border-radius: 50%; background: var(--wc, #2a9d8f); flex-shrink: 0; }
.multi-badge {
  margin-left: auto;
  background: var(--wc, #2a9d8f);
  color: white;
  padding: 2px 8px;
  border-radius: 50px;
  font-size: 11px;
}
.match-detail {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 16px;
  cursor: pointer;
  transition: background var(--transition);
  border-bottom: 1px solid var(--cream);
}
.match-detail:last-child { border-bottom: none; }
.match-detail:hover { background: var(--cream); }
.match-pos { font-size: 13px; font-weight: 600; color: var(--navy); }
.match-dir { font-size: 12px; color: var(--text-muted); background: var(--cream); padding: 3px 10px; border-radius: 50px; }
.not-found-list {
  background: rgba(231,111,81,0.05);
  border: 1px solid rgba(231,111,81,0.15);
  border-radius: var(--radius);
  padding: 16px;
  margin-top: 12px;
}
.not-found-list h4 { font-size: 13px; color: var(--coral); margin-bottom: 10px; }
.error-box {
  display: flex;
  align-items: center;
  gap: 14px;
  background: rgba(231,111,81,0.08);
  border: 1.5px solid rgba(231,111,81,0.2);
  border-radius: var(--radius);
  padding: 18px 20px;
  color: var(--coral);
}
.error-box p { font-weight: 600; }

.pulse-once { animation: pulseInput 0.5s ease; }
@keyframes pulseInput { 0%,100%{border-color:var(--border)}50%{border-color:var(--teal);box-shadow:0 0 0 4px rgba(42,157,143,0.15)} }

/* ===== STATS SECTION ===== */
.stats-section {
  background: var(--navy);
  padding: 60px 24px;
  color: white;
  text-align: center;
}
.stats-grid {
  max-width: var(--max-w);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}
.stat-card { padding: 20px; }
.stat-card .counter-num {
  font-family: var(--font-display);
  font-size: 52px;
  font-weight: 700;
  color: var(--amber);
  line-height: 1;
  display: block;
}
.stat-card .stat-label {
  font-size: 14px;
  color: rgba(255,255,255,0.65);
  margin-top: 6px;
  font-weight: 500;
}

/* ===== HOW IT WORKS ===== */
#how-it-works { padding: 80px 24px; background: var(--cream); }
.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-top: 56px;
}
.step-card {
  background: white;
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  border: 1px solid var(--border);
  position: relative;
  transition: transform var(--transition), box-shadow var(--transition);
}
.step-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.step-number {
  position: absolute;
  top: 24px; right: 24px;
  font-family: var(--font-display);
  font-size: 72px;
  font-weight: 700;
  color: rgba(38,70,83,0.06);
  line-height: 1;
}
.step-icon {
  width: 56px; height: 56px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 26px;
  margin-bottom: 20px;
}
.step-icon.amber { background: rgba(244,162,97,0.15); }
.step-icon.teal { background: rgba(42,157,143,0.15); }
.step-icon.coral { background: rgba(231,111,81,0.15); }
.step-card h3 { font-size: 20px; margin-bottom: 12px; }
.step-card p { font-size: 15px; color: var(--text-muted); line-height: 1.65; }

/* ===== DIRECTIONS ===== */
#directions { padding: 80px 24px; background: var(--warm-white); }
.directions-cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 48px;
}
.dir-card {
  background: white;
  border-radius: var(--radius);
  padding: 24px 20px;
  text-align: center;
  border: 1.5px solid var(--border);
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
  cursor: default;
}
.dir-card:hover { transform: translateY(-4px); border-color: var(--teal-light); box-shadow: var(--shadow-md); }
.dir-card .dir-emoji { font-size: 36px; display: block; margin-bottom: 12px; }
.dir-card h4 { font-size: 15px; font-family: var(--font-display); margin-bottom: 6px; }
.dir-card p { font-size: 13px; color: var(--text-muted); }

/* ===== FEATURES ===== */
#features { padding: 80px 24px; background: var(--cream); }
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}
.feature-card {
  background: white;
  border-radius: var(--radius);
  padding: 28px 24px;
  border: 1px solid var(--border);
  transition: transform var(--transition), box-shadow var(--transition);
}
.feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.feature-icon {
  font-size: 32px;
  margin-bottom: 16px;
  display: block;
}
.feature-card h3 { font-size: 18px; margin-bottom: 8px; }
.feature-card p { font-size: 14px; color: var(--text-muted); line-height: 1.65; }

/* ===== USE CASES ===== */
#use-cases { padding: 80px 24px; background: var(--warm-white); }
.use-cases-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
  margin-top: 48px;
}
.use-case-card {
  background: white;
  border-radius: var(--radius-lg);
  padding: 32px;
  border: 1px solid var(--border);
  display: flex;
  gap: 20px;
  align-items: flex-start;
  transition: transform var(--transition), box-shadow var(--transition);
}
.use-case-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.use-case-icon {
  font-size: 40px;
  flex-shrink: 0;
  width: 64px; height: 64px;
  border-radius: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(244,162,97,0.12);
}
.use-case-card h3 { font-size: 19px; margin-bottom: 8px; }
.use-case-card p { font-size: 14px; color: var(--text-muted); line-height: 1.65; }

/* ===== TIPS ===== */
#tips { padding: 80px 24px; background: var(--cream); }
.tips-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-top: 48px;
}
.tip-card {
  background: white;
  border-radius: var(--radius);
  padding: 24px;
  border: 1px solid var(--border);
  display: flex;
  gap: 16px;
  align-items: flex-start;
}
.tip-num {
  width: 34px; height: 34px;
  border-radius: 10px;
  background: var(--navy);
  color: white;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.tip-card h4 { font-size: 15px; margin-bottom: 6px; }
.tip-card p { font-size: 14px; color: var(--text-muted); line-height: 1.6; }

/* ===== ABOUT ===== */
#about { padding: 80px 24px; background: var(--warm-white); }
.about-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.about-content p {
  font-size: 16px;
  color: var(--text-muted);
  line-height: 1.75;
  margin-bottom: 16px;
}
.about-visual {
  background: white;
  border-radius: var(--radius-lg);
  padding: 32px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-md);
}
.keyword-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.kw-tag {
  padding: 7px 16px;
  border-radius: 50px;
  font-size: 13px;
  font-weight: 600;
  border: 1.5px solid;
}

/* ===== FAQ ===== */
#faq { padding: 80px 24px; background: var(--cream); }
.faq-list { max-width: 760px; margin: 48px auto 0; }
.faq-item {
  background: white;
  border-radius: var(--radius);
  border: 1.5px solid var(--border);
  margin-bottom: 12px;
  overflow: hidden;
  transition: border-color var(--transition);
}
.faq-item.open { border-color: var(--teal-light); }
.faq-question {
  width: 100%;
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  background: none;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 600;
  color: var(--navy);
  cursor: pointer;
  text-align: left;
}
.faq-icon {
  width: 28px; height: 28px;
  border-radius: 50%;
  background: rgba(42,157,143,0.1);
  color: var(--teal-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
  transition: transform 0.3s;
}
.faq-item.open .faq-icon { transform: rotate(45deg); background: var(--teal); color: white; }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.4,0,0.2,1), padding 0.3s;
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.7;
  padding: 0 24px;
}
.faq-item.open .faq-answer { max-height: 400px; padding: 0 24px 20px; }

/* ===== CTA SECTION ===== */
.cta-section {
  background: linear-gradient(135deg, var(--navy) 0%, var(--teal-dark) 100%);
  padding: 80px 24px;
  text-align: center;
  color: white;
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  top: -60%; left: -20%;
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(244,162,97,0.15) 0%, transparent 70%);
  pointer-events: none;
}
.cta-section h2 { color: white; font-size: clamp(30px, 4vw, 48px); margin-bottom: 16px; }
.cta-section p { color: rgba(255,255,255,0.75); font-size: 17px; margin-bottom: 36px; max-width: 520px; margin-left: auto; margin-right: auto; }
.cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--amber);
  color: var(--navy);
  padding: 16px 36px;
  border-radius: 50px;
  font-size: 16px;
  font-weight: 700;
  transition: transform var(--transition), box-shadow var(--transition);
}
.cta-btn:hover { transform: translateY(-3px); box-shadow: 0 16px 40px rgba(244,162,97,0.4); }

/* ===== FOOTER ===== */
.site-footer {
  background: var(--navy);
  color: rgba(255,255,255,0.7);
  padding-top: 64px;
  position: relative;
  overflow: hidden;
  /* FIX: Ensure footer stays below content and fixed elements */
  z-index: 10;
}
.footer-glow {
  position: absolute;
  top: -100px; right: -100px;
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(42,157,143,0.08) 0%, transparent 70%);
  pointer-events: none;
}
.footer-inner { max-width: var(--max-w); margin: 0 auto; padding: 0 24px; }
.footer-top {
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 64px;
  padding-bottom: 48px;
}
.footer-logo .logo-main { color: white; }
.footer-logo .logo-icon { background: rgba(255,255,255,0.1); }
.footer-tagline { font-size: 14px; margin-top: 14px; line-height: 1.7; max-width: 280px; }
.footer-badges { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 18px; }
.badge {
  padding: 5px 12px;
  border-radius: 50px;
  font-size: 12px;
  font-weight: 600;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.12);
  color: rgba(255,255,255,0.75);
}
.footer-links-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.footer-col h4 {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: rgba(255,255,255,0.45);
  margin-bottom: 16px;
  font-family: var(--font-body);
}
.footer-col ul { display: flex; flex-direction: column; gap: 10px; }
.footer-col a { font-size: 14px; color: rgba(255,255,255,0.65); transition: color var(--transition); }
.footer-col a:hover { color: var(--amber); }
.footer-divider { border: none; border-top: 1px solid rgba(255,255,255,0.07); }
.footer-bottom {
  padding: 24px 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.copyright { font-size: 13px; color: rgba(255,255,255,0.45); }
.footer-disclaimer { font-size: 12px; color: rgba(255,255,255,0.3); }

/* ===== ANIMATIONS ===== */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-16px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeInRight {
  from { opacity: 0; transform: translateX(32px); }
  to { opacity: 1; transform: translateX(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}
.animate-on-scroll {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.animate-on-scroll.in-view { opacity: 1; transform: none; }
.animate-on-scroll:nth-child(2) { transition-delay: 0.1s; }
.animate-on-scroll:nth-child(3) { transition-delay: 0.2s; }
.animate-on-scroll:nth-child(4) { transition-delay: 0.3s; }

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; gap: 48px; }  
  .solver-layout { grid-template-columns: 1fr; }
  .solver-sidebar { display: grid; grid-template-columns: 1fr 1fr; }
  .results-body { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .about-inner { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; gap: 40px; }
  .directions-cards { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  :root { --header-h: 64px; }
  .main-nav { display: none; }
  .hamburger { display: flex; }
  .mobile-nav { display: block; }
  .btn-solve-now { display: none; }
  .steps-grid, .features-grid, .use-cases-grid, .tips-grid { grid-template-columns: 1fr; }
  .footer-links-grid { grid-template-columns: repeat(2, 1fr); }
  .solver-sidebar { grid-template-columns: 1fr; }
  .directions-cards { grid-template-columns: 1fr 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
}
@media (max-width: 480px) {
  .hero-actions { flex-direction: column; }
  .btn-primary, .btn-secondary { width: 100%; justify-content: center; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .directions-cards { grid-template-columns: 1fr 1fr; }
  .footer-links-grid { grid-template-columns: 1fr; }
  .demo-cell { width: 26px; height: 26px; font-size: 11px; }
  .demo-grid { gap: 3px; }
}