/* Corrigi - Teacher Cockpit Stylesheet */
:root {
  color-scheme: light;
  --bg: #f8fafc;
  --bg-subtle: #f1f5f9;
  --card-bg: #ffffff;
  --ink: #0f172a;
  --ink-muted: #475569;
  --ink-subtle: #64748b;
  --brand: #2563eb;
  --brand-dark: #1d4ed8;
  --brand-deep: #1e3a8a;
  --brand-light: #eff6ff;
  --brand-border: #bfdbfe;
  --border: #e2e8f0;
  --border-subtle: #cbd5e1;
  --success: #10b981;
  --success-dark: #047857;
  --success-light: #ecfdf5;
  --success-border: #a7f3d0;
  --error: #f43f5e;
  --error-dark: #be123c;
  --error-light: #fff1f2;
  --error-border: #fecdd3;
  --amber: #f59e0b;
  --amber-light: #fef3c7;
  --amber-border: #fde68a;
  --shadow-sm: 0 1px 2px 0 rgba(15, 23, 42, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.07), 0 2px 4px -2px rgba(15, 23, 42, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.08), 0 4px 6px -4px rgba(15, 23, 42, 0.04);
  --shadow-xl: 0 20px 25px -5px rgba(15, 23, 42, 0.09), 0 8px 10px -6px rgba(15, 23, 42, 0.04);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background-color: var(--bg);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; height: auto; }
.header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}
.nav-container {
  max-width: 1200px; margin: 0 auto; padding: 0 20px;
  height: 68px; display: flex; align-items: center; justify-content: space-between; gap: 16px;
}
.brand-link {
  display: inline-flex; align-items: center; gap: 10px;
  font-weight: 800; font-size: 1.25rem; letter-spacing: -0.02em; color: var(--ink);
}
.brand-icon {
  width: 34px; height: 34px; border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--brand), var(--brand-dark));
  color: #ffffff; display: grid; place-items: center;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
}
.brand-icon svg { width: 20px; height: 20px; }
.nav-menu { display: flex; align-items: center; gap: 24px; }
.nav-item { color: var(--ink-muted); font-weight: 600; font-size: 0.95rem; transition: color 0.15s ease; }
.nav-item:hover { color: var(--brand); }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 10px 20px; font-weight: 700; font-size: 0.95rem;
  border-radius: var(--radius-md); cursor: pointer; border: 1px solid transparent; line-height: 1.2;
  transition: all 0.2s ease;
}
.btn-primary { background: var(--brand); color: #ffffff; box-shadow: 0 4px 14px rgba(37, 99, 235, 0.28); }
.btn-primary:hover { background: var(--brand-dark); transform: translateY(-1px); }
.btn-secondary { background: #ffffff; color: var(--ink); border-color: var(--border); box-shadow: var(--shadow-sm); }
.btn-secondary:hover { background: var(--bg-subtle); }
.btn-large { padding: 14px 28px; font-size: 1.05rem; border-radius: var(--radius-lg); }

.hero-section {
  padding: 54px 20px 48px;
  background: radial-gradient(circle at 80% 20%, rgba(219, 234, 254, 0.5) 0%, rgba(248, 250, 252, 0) 65%);
}
.hero-grid {
  max-width: 1200px; margin: 0 auto;
  display: grid; grid-template-columns: 1.15fr 1fr; gap: 48px; align-items: center;
}
.badge-tag {
  display: inline-flex; align-items: center; gap: 8px; padding: 6px 14px;
  background: var(--brand-light); border: 1px solid var(--brand-border);
  border-radius: 9999px; color: var(--brand-dark); font-size: 0.85rem; font-weight: 700; margin-bottom: 18px;
}
.hero-title {
  font-size: clamp(2.1rem, 4vw, 3.4rem); font-weight: 850; line-height: 1.12;
  letter-spacing: -0.03em; color: var(--ink); margin: 0 0 18px;
}
.hero-lead { font-size: 1.12rem; line-height: 1.6; color: var(--ink-muted); margin: 0 0 28px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 28px; }
.hero-proof-row { display: flex; flex-wrap: wrap; gap: 20px; padding-top: 18px; border-top: 1px solid var(--border); }
.proof-item { display: flex; align-items: center; gap: 8px; font-size: 0.88rem; font-weight: 600; color: var(--ink-muted); }
.proof-check { color: var(--success); font-weight: 800; }

.cockpit-preview {
  background: #ffffff; border-radius: var(--radius-xl); border: 1px solid var(--border);
  box-shadow: var(--shadow-xl); padding: 22px; position: relative;
}
.cockpit-topbar {
  display: flex; align-items: center; justify-content: space-between; padding-bottom: 12px;
  margin-bottom: 14px; border-bottom: 1px solid var(--border);
}
.cockpit-status {
  display: flex; align-items: center; gap: 8px; font-size: 0.82rem; font-weight: 700;
  color: var(--success-dark); background: var(--success-light); border: 1px solid var(--success-border);
  padding: 4px 10px; border-radius: 9999px;
}
.pulse-dot {
  width: 8px; height: 8px; border-radius: 50%; background: var(--success);
  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.25);
}
.cockpit-time { font-size: 0.82rem; font-weight: 600; color: var(--ink-subtle); }
.cockpit-student-card {
  background: var(--bg-subtle); border-radius: var(--radius-md); padding: 12px 14px;
  margin-bottom: 16px; display: flex; justify-content: space-between; align-items: center;
  border: 1px solid var(--border);
}
.student-info h4 { margin: 0; font-size: 0.95rem; font-weight: 800; color: var(--ink); }
.student-info p { margin: 2px 0 0; font-size: 0.8rem; color: var(--ink-muted); }
.score-badge {
  text-align: right; background: #ffffff; padding: 6px 14px;
  border-radius: var(--radius-md); border: 1px solid var(--success-border); box-shadow: var(--shadow-sm);
}
.score-number { font-size: 1.35rem; font-weight: 900; color: var(--success-dark); line-height: 1; }
.score-label { font-size: 0.68rem; font-weight: 700; text-transform: uppercase; color: var(--ink-subtle); }

.bubble-sheet-sim {
  background: #ffffff; border: 1px dashed var(--border-subtle); border-radius: var(--radius-md);
  padding: 12px 14px;
}
.sim-header {
  display: flex; justify-content: space-between; font-size: 0.72rem; font-weight: 700;
  color: var(--ink-subtle); text-transform: uppercase; margin-bottom: 10px;
}
.bubble-rows { display: flex; flex-direction: column; gap: 8px; }
.bubble-row {
  display: flex; align-items: center; justify-content: space-between; font-size: 0.82rem;
  font-weight: 700; padding: 4px 6px; border-radius: var(--radius-sm);
}
.bubble-row:hover { background: var(--bg); }
.q-num { width: 26px; color: var(--ink-muted); font-weight: 800; }
.q-options { display: flex; gap: 10px; }
.bubble {
  width: 22px; height: 22px; border-radius: 50%; border: 1.5px solid var(--border-subtle);
  display: grid; place-items: center; font-size: 0.7rem; font-weight: 700; color: var(--ink-muted);
}
.bubble.filled-correct { background: #334155; color: #ffffff; border-color: #334155; box-shadow: 0 0 0 2px var(--success); }
.bubble.filled-wrong { background: #334155; color: #ffffff; border-color: #334155; box-shadow: 0 0 0 2px var(--error); }
.bubble.correct-key { border-color: var(--success); color: var(--success-dark); background: var(--success-light); }
.q-feedback { font-size: 0.75rem; font-weight: 700; }
.q-feedback.feedback-correct { color: var(--success-dark); }
.q-feedback.feedback-wrong { color: var(--error-dark); }

.cockpit-insight {
  margin-top: 14px; background: var(--amber-light); border: 1px solid var(--amber-border);
  border-radius: var(--radius-md); padding: 10px 14px; display: flex; gap: 10px;
  align-items: center; font-size: 0.82rem; color: #92400e; font-weight: 600;
}

.section { padding: 68px 20px; }
.section-alt { background: var(--bg-subtle); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.container { max-width: 1200px; margin: 0 auto; }
.section-header { text-align: center; max-width: 720px; margin: 0 auto 48px; }
.section-kicker { font-size: 0.85rem; font-weight: 800; text-transform: uppercase; letter-spacing: 0.08em; color: var(--brand); margin-bottom: 10px; }
.section-title { font-size: clamp(1.8rem, 3vw, 2.5rem); font-weight: 850; line-height: 1.2; letter-spacing: -0.02em; color: var(--ink); margin: 0 0 14px; }
.section-desc { font-size: 1.05rem; color: var(--ink-muted); line-height: 1.6; margin: 0; }

.steps-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.step-card {
  background: #ffffff; border: 1px solid var(--border); border-radius: var(--radius-lg);
  padding: 30px 24px; box-shadow: var(--shadow-sm); display: flex; flex-direction: column;
  transition: all 0.2s ease;
}
.step-card:hover { border-color: var(--brand-border); box-shadow: var(--shadow-lg); transform: translateY(-3px); }
.step-number {
  width: 42px; height: 42px; border-radius: var(--radius-md); background: var(--brand-light);
  color: var(--brand); display: grid; place-items: center; font-weight: 800; font-size: 1.1rem;
  margin-bottom: 18px; border: 1px solid var(--brand-border);
}
.step-title { font-size: 1.2rem; font-weight: 800; color: var(--ink); margin: 0 0 10px; line-height: 1.3; }
.step-text { font-size: 0.94rem; color: var(--ink-muted); line-height: 1.6; margin: 0; }

.calculator-card {
  background: #ffffff; border: 1px solid var(--brand-border); border-radius: var(--radius-xl);
  padding: 36px; box-shadow: var(--shadow-lg); max-width: 960px; margin: 0 auto;
}
.calc-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 36px; align-items: center; }
.calc-inputs { display: flex; flex-direction: column; gap: 22px; }
.calc-group label { display: block; font-size: 0.92rem; font-weight: 700; color: var(--ink); margin-bottom: 8px; }
.calc-range-wrapper { display: flex; align-items: center; gap: 14px; }
.calc-range { flex: 1; accent-color: var(--brand); height: 8px; cursor: pointer; }
.calc-range-val {
  min-width: 65px; text-align: center; padding: 6px 10px; background: var(--bg-subtle);
  border: 1px solid var(--border); border-radius: var(--radius-sm); font-weight: 800; font-size: 0.95rem; color: var(--ink);
}
.calc-result-box {
  background: linear-gradient(145deg, #1e293b, #0f172a); color: #ffffff;
  border-radius: var(--radius-lg); padding: 32px 24px; text-align: center; box-shadow: var(--shadow-lg);
}
.calc-result-kicker { font-size: 0.82rem; text-transform: uppercase; letter-spacing: 0.08em; color: #93c5fd; font-weight: 700; margin-bottom: 6px; }
.calc-result-number { font-size: clamp(2.4rem, 4.5vw, 3.5rem); font-weight: 900; line-height: 1; color: #60a5fa; margin-bottom: 8px; }
.calc-result-desc { font-size: 0.9rem; color: #cbd5e1; line-height: 1.5; margin: 0; }

.comparison-wrapper {
  background: #ffffff; border-radius: var(--radius-lg); border: 1px solid var(--border);
  box-shadow: var(--shadow-sm); overflow: hidden; max-width: 980px; margin: 0 auto;
}
.table-responsive { width: 100%; overflow-x: auto; }
.comparison-table { width: 100%; border-collapse: collapse; text-align: left; }
.comparison-table th, .comparison-table td { padding: 14px 18px; border-bottom: 1px solid var(--border); font-size: 0.92rem; }
.comparison-table th { background: var(--bg-subtle); font-weight: 800; color: var(--ink); }
.comparison-table th.col-highlight { background: var(--brand-light); color: var(--brand-dark); border-top: 3px solid var(--brand); }
.comparison-table td.col-highlight { background: rgba(239, 246, 255, 0.45); font-weight: 700; color: var(--ink); }

.ad-relevance-context {
  background: #ffffff; border: 1px solid var(--border); border-radius: var(--radius-lg);
  padding: 30px; margin: 44px auto 0; max-width: 1080px; box-shadow: var(--shadow-sm);
}
.ad-relevance-context h3 { font-size: 1.2rem; font-weight: 800; color: var(--ink); margin: 0 0 10px; }
.ad-relevance-context p { color: var(--ink-muted); font-size: 0.94rem; line-height: 1.6; margin: 0 0 14px; }
.keyword-chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.keyword-chip {
  display: inline-flex; align-items: center; padding: 4px 11px;
  background: var(--bg-subtle); border: 1px solid var(--border); border-radius: 9999px;
  font-size: 0.82rem; font-weight: 600; color: var(--ink-muted);
}

.faq-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; max-width: 1040px; margin: 0 auto; }
.faq-card { background: #ffffff; border: 1px solid var(--border); border-radius: var(--radius-md); padding: 22px; box-shadow: var(--shadow-sm); }
.faq-q { font-size: 1rem; font-weight: 800; color: var(--ink); margin: 0 0 8px; }
.faq-a { font-size: 0.9rem; color: var(--ink-muted); line-height: 1.6; margin: 0; }

.final-cta {
  background: linear-gradient(135deg, var(--brand-deep), var(--brand-dark)); color: #ffffff;
  padding: 64px 20px; text-align: center; border-radius: var(--radius-xl);
  max-width: 1140px; margin: 40px auto; box-shadow: var(--shadow-xl);
}
.final-cta h2 { font-size: clamp(1.8rem, 3.2vw, 2.6rem); font-weight: 850; margin: 0 0 14px; line-height: 1.2; }
.final-cta p { font-size: 1.1rem; color: #e0e7ff; max-width: 600px; margin: 0 auto 28px; line-height: 1.6; }
.final-cta .btn { background: #ffffff; color: var(--brand-dark); font-weight: 800; }
.final-cta .btn:hover { background: var(--brand-light); }

.footer { border-top: 1px solid var(--border); background: #ffffff; padding: 32px 20px; font-size: 0.88rem; color: var(--ink-subtle); }
.footer-container { max-width: 1200px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 16px; }

@media (max-width: 960px) {
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .steps-grid { grid-template-columns: 1fr; }
  .calc-grid { grid-template-columns: 1fr; }
  .faq-grid { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .nav-menu { display: none; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; }
}