/* ═══════════════════════════════════════════════
   ONIUS Sales Page — Mobile-First
   Light theme · No menu nav · CTA-only
   ═══════════════════════════════════════════════ */

/* ── Reset & Base ─────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg: #ffffff;
  --bg-alt: #f9fafb;
  --bg-accent: #FFF8EC;
  --text: #1f2937;
  --text-muted: #6b7280;
  --primary: #C97E08;
  --primary-hover: #9A6206;
  --primary-light: #FFF8EC;
  --success: #059669;
  --warning: #f59e0b;
  --red: #dc2626;
  --border: #e5e7eb;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.06);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,.08), 0 2px 4px -2px rgba(0,0,0,.06);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,.08), 0 4px 6px -4px rgba(0,0,0,.06);
  --max-w: 800px;
}

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

body {
  font-family: 'Be Vietnam Pro', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 20px;
}

/* ── Typography ────────────────────────────── */
h1, h2, h3 {
  line-height: 1.3;
}

a {
  color: inherit;
  text-decoration: none;
}

/* ── Buttons ───────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: transform .15s, box-shadow .15s;
  border: 2px solid transparent;
  white-space: normal;
  max-width: 100%;
}
.btn:hover {
  transform: translateY(-1px);
}
.btn:active {
  transform: translateY(0);
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: var(--shadow-md);
}
.btn-primary:hover {
  background: var(--primary-hover);
  box-shadow: var(--shadow-lg);
}

.btn-outline {
  background: #fff;
  color: var(--primary);
  border-color: var(--primary);
}
.btn-outline:hover {
  background: var(--primary-light);
}

.btn--large {
  padding: 18px 36px;
  font-size: 1.125rem;
}

.cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

.cta-center {
  text-align: center;
  margin: 32px 0;
}

.cta-note {
  margin-top: 12px;
  font-size: .875rem;
  color: var(--text-muted);
  text-align: center;
}

/* ── HERO (Khối 1–3: Hook) ─────────────────── */
.hero {
  padding: 60px 0 40px;
  text-align: center;
  background: linear-gradient(180deg, #FFF8EC 0%, #fff 100%);
}

.pre-headline {
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .12em;
  color: var(--primary);
  margin-bottom: 16px;
  text-transform: uppercase;
}

.headline {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--text);
  max-width: 700px;
  margin: 0 auto 20px;
  line-height: 1.25;
}

.sub-headline {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto 32px;
  line-height: 1.6;
}

/* ── Sections ──────────────────────────────── */
.section {
  padding: 56px 0;
}

.section:nth-child(even) {
  background: var(--bg-alt);
}

.section-label {
  font-size: .8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--red);
  text-align: center;
  margin-bottom: 24px;
}

.section-title {
  font-size: 1.5rem;
  font-weight: 800;
  text-align: center;
  margin-bottom: 12px;
}

.section-sub {
  text-align: center;
  color: var(--text-muted);
  font-size: 1.05rem;
  margin-bottom: 32px;
  max-width: 550px;
  margin-left: auto;
  margin-right: auto;
}

/* ── Pain Grid ─────────────────────────────── */
.pain-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-bottom: 24px;
}

.pain-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  box-shadow: var(--shadow);
}

.pain-icon {
  font-size: 1.5rem;
  flex-shrink: 0;
}

.pain-conclusion {
  text-align: center;
  font-size: 1.05rem;
  padding: 20px;
  background: #fef2f2;
  border-radius: var(--radius);
  border-left: 3px solid var(--red);
}

/* ── Story (Epiphany Bridge) ───────────────── */
.story-beats {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-top: 28px;
}

.beat {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.beat-num {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  background: var(--primary);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.1rem;
}

.beat h3 {
  font-size: 1rem;
  margin-bottom: 4px;
  color: var(--primary);
}

.beat p {
  font-size: .95rem;
  color: var(--text-muted);
}

/* ── Big Domino ────────────────────────────── */
.domino-box {
  text-align: center;
  max-width: 600px;
  margin: 0 auto;
}

.domino-old {
  background: #fef2f2;
  padding: 16px 20px;
  border-radius: var(--radius-sm);
  color: var(--red);
  font-size: 1.05rem;
}

.domino-arrow {
  font-size: 1.5rem;
  color: var(--text-muted);
  margin: 8px 0;
}

.domino-new {
  background: #ecfdf5;
  padding: 20px 24px;
  border-radius: var(--radius-sm);
  color: var(--success);
  font-size: 1.1rem;
  border: 2px solid var(--success);
}

.domino-tagline {
  text-align: center;
  color: var(--text-muted);
  margin-top: 16px;
  font-style: italic;
}

/* ── Mechanism (3 lớp) ─────────────────────── */
.mechanism {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 24px;
}

.mechanism-layer {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
}

.mechanism-arrow {
  text-align: center;
  font-size: 1.5rem;
  color: var(--primary);
  font-weight: 800;
}

.layer-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.layer-num {
  background: var(--primary-light);
  color: var(--primary);
  padding: 4px 12px;
  border-radius: 20px;
  font-size: .8rem;
  font-weight: 700;
}

.layer-header h3 {
  font-size: 1.1rem;
}

.steps-7 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  margin-top: 8px;
}

.step {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  background: var(--bg-alt);
  border-radius: var(--radius-sm);
  font-size: .95rem;
}

.step span {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  background: var(--primary);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: .85rem;
}

.diff-list {
  list-style: none;
  margin-top: 8px;
}

.diff-list li {
  padding: 8px 0;
  font-size: .95rem;
  border-bottom: 1px solid var(--border);
}
.diff-list li:last-child { border-bottom: none; }

/* ── Proof Grid ────────────────────────────── */
.proof-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 24px;
}

.proof-card {
  text-align: center;
  padding: 28px 16px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.proof-num {
  display: block;
  font-size: 2rem;
  font-weight: 900;
  color: var(--primary);
}

.proof-label {
  display: block;
  font-weight: 700;
  font-size: .9rem;
  margin: 6px 0;
}

.proof-card p {
  font-size: .85rem;
  color: var(--text-muted);
  margin-top: 6px;
}

/* ── Testimonials ──────────────────────────── */
.testimonial-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: 24px;
}

.testimonial-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
}

.testimonial-stars {
  font-size: 1.1rem;
  margin-bottom: 10px;
}

.testimonial-text {
  font-size: .95rem;
  font-style: italic;
  color: var(--text);
  margin-bottom: 12px;
}

.testimonial-author {
  font-size: .85rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border);
  padding-top: 10px;
}

/* ── Pricing / Offer ───────────────────────── */
.pricing-grid {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-top: 24px;
}

.pricing-card {
  background: #fff;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  text-align: center;
  position: relative;
  box-shadow: var(--shadow);
}

.pricing-card--featured {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(232,152,12,.12), var(--shadow-md);
}

.pricing-badge {
  font-size: .75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: .06em;
  margin-bottom: 12px;
}

.pricing-badge--hot {
  color: var(--primary);
}

.pricing-card h3 {
  font-size: 1.25rem;
  margin-bottom: 6px;
}

.pricing-desc {
  font-size: .9rem;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.pricing-price {
  font-size: 2rem;
  font-weight: 900;
  color: var(--primary);
  margin-bottom: 20px;
}

.pricing-features {
  list-style: none;
  text-align: left;
  margin-bottom: 20px;
}

.pricing-features li {
  padding: 6px 0;
  font-size: .9rem;
  border-bottom: 1px solid var(--bg-alt);
}
.pricing-features li:last-child { border-bottom: none; }

.pricing-value {
  font-size: .8rem;
  color: var(--text-muted);
  margin-bottom: 16px;
  padding: 8px;
  background: var(--bg-alt);
  border-radius: var(--radius-sm);
}

.offer-stack-summary {
  text-align: center;
  margin-top: 24px;
  padding: 16px;
  background: var(--primary-light);
  border-radius: var(--radius-sm);
  font-size: .95rem;
}

/* ── Bonus ─────────────────────────────────── */
.bonus-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: 24px;
}

.bonus-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
  text-align: center;
}

.bonus-icon {
  font-size: 2.2rem;
  margin-bottom: 10px;
}

.bonus-card h3 {
  font-size: 1.05rem;
  margin-bottom: 8px;
}

.bonus-card p {
  font-size: .9rem;
  color: var(--text-muted);
}

.bonus-total {
  text-align: center;
  margin-top: 24px;
  padding: 16px;
  background: var(--bg-accent);
  border-radius: var(--radius-sm);
  font-size: 1.05rem;
}

/* ── Guarantee ─────────────────────────────── */
.guarantee-box {
  background: #fff;
  border: 2px solid var(--success);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  box-shadow: 0 0 0 4px rgba(5,150,105,.08);
}

.guarantee-icon {
  font-size: 3rem;
  margin-bottom: 12px;
}

.guarantee-box > h2 {
  margin-bottom: 24px;
}

.guarantee-items {
  display: flex;
  flex-direction: column;
  gap: 16px;
  text-align: left;
}

.guarantee-item {
  padding: 16px;
  background: var(--bg-alt);
  border-radius: var(--radius-sm);
}

.guarantee-item h3 {
  font-size: 1rem;
  color: var(--success);
  margin-bottom: 4px;
}

.guarantee-item p {
  font-size: .9rem;
  color: var(--text-muted);
}

/* ── Urgency ───────────────────────────────── */
.urgency-box {
  background: #fffbeb;
  border: 2px solid var(--warning);
  border-radius: var(--radius);
  padding: 28px 24px;
  text-align: center;
}

.urgency-box h2 {
  color: #b45309;
  margin-bottom: 12px;
}

.urgency-box p {
  font-size: 1rem;
  margin-bottom: 8px;
}

.urgency-note {
  font-size: .85rem !important;
  color: var(--text-muted);
  font-style: italic;
}

/* ── FAQ ───────────────────────────────────── */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 24px;
}

.faq-item {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.faq-item summary {
  padding: 16px 20px;
  font-weight: 600;
  cursor: pointer;
  font-size: .95rem;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.faq-item summary::after {
  content: '+';
  font-size: 1.2rem;
  color: var(--primary);
  font-weight: 700;
  transition: transform .2s;
}
.faq-item[open] summary::after {
  content: '−';
}

.faq-item p {
  padding: 0 20px 16px;
  font-size: .9rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ── PS Section ────────────────────────────── */
.ps-section {
  margin-top: 40px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.ps-card {
  background: #fffbeb;
  border: 1px solid var(--warning);
  border-radius: var(--radius-sm);
  padding: 20px;
}

.ps-label {
  font-weight: 900;
  color: #b45309;
  font-size: 1.1rem;
  margin-bottom: 6px;
}

.ps-card p {
  font-size: .92rem;
}

/* ── CTA Final ─────────────────────────────── */
.cta-final {
  background: var(--primary);
  color: #fff;
  text-align: center;
  padding: 48px 0;
}

.cta-final-headline {
  font-size: 1.35rem;
  font-weight: 800;
  margin-bottom: 24px;
  color: #fff;
}

.cta-final .btn-outline {
  background: transparent;
  color: #fff;
  border-color: #fff;
}
.cta-final .btn-outline:hover {
  background: rgba(255,255,255,.1);
}

.cta-final .cta-note {
  color: rgba(255,255,255,.8);
}

/* ── Footer ────────────────────────────────── */
.site-footer {
  background: var(--text);
  color: #9ca3af;
  text-align: center;
  padding: 24px 0;
  font-size: .8rem;
}
.site-footer p + p {
  margin-top: 4px;
}

/* ── Mobile Landscape ──────────────────────── */
@media (min-width: 480px) {
  .proof-grid {
    grid-template-columns: 1fr 1fr;
  }
  .steps-7 {
    grid-template-columns: 1fr 1fr;
  }
}

/* ── Tablet ────────────────────────────────── */
@media (min-width: 768px) {
  .headline {
    font-size: 2.25rem;
  }
  .section-title {
    font-size: 1.75rem;
  }
  .pain-grid {
    grid-template-columns: 1fr 1fr;
  }
  .testimonial-grid {
    grid-template-columns: 1fr 1fr;
  }
  .bonus-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .pricing-grid {
    flex-direction: row;
    align-items: stretch;
  }
  .pricing-card {
    flex: 1;
  }
  .guarantee-items {
    flex-direction: row;
  }
  .guarantee-item {
    flex: 1;
  }
}

/* ── Desktop ───────────────────────────────── */
@media (min-width: 1024px) {
  .headline {
    font-size: 2.75rem;
  }
}