/* ===========================
   ARC OS Page Styles
   Extends site design tokens from styles.css
   =========================== */

/* Layout */
.page-arc-os main {
  padding-top: 64px;
}

.aos-narrow {
  max-width: var(--content-width);
  margin: 0 auto;
}

.text-center {
  text-align: center;
}

/* Label */
.aos-label {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 16px;
}

/* Sections */
.aos-section {
  padding: 96px 0;
}

.aos-section-alt {
  background: var(--color-card-bg);
}

.aos-section-guarantee {
  background: var(--color-dark);
  color: #fff;
}

.aos-section-guarantee .aos-label {
  color: var(--color-primary);
}

.aos-section-guarantee h2 {
  color: #fff;
  font-size: 2rem;
  line-height: 1.4;
}

.aos-section-guarantee p {
  color: rgba(255, 255, 255, 0.7);
}

/* Hero */
.aos-hero {
  padding: 140px 0 96px;
  text-align: center;
}

.aos-hero h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
  color: var(--color-dark);
  margin-bottom: 20px;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.aos-hero-qualifier {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-dark);
  border: 1.5px solid var(--color-border-subtle);
  border-radius: var(--radius-pill);
  padding: 8px 24px;
  margin-bottom: 20px;
  margin-top: 4px;
  letter-spacing: 0.01em;
}

.aos-hero-sub {
  font-size: 1.15rem;
  color: var(--color-text);
  line-height: 1.7;
  margin-bottom: 16px;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

.aos-hero-promise {
  font-size: 1.15rem;
  color: var(--color-dark);
  margin-bottom: 40px;
}

/* Proof Bar */
.aos-proof {
  padding: 56px 0;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.aos-proof-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  text-align: center;
}

.aos-proof-number {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--color-primary);
  letter-spacing: -0.02em;
  margin-bottom: 6px;
}

.aos-proof-label {
  font-size: 0.85rem;
  color: var(--color-text-light);
  line-height: 1.5;
}

/* Section Typography */
.aos-section h2 {
  margin-bottom: 20px;
}

.aos-sub {
  font-size: 1.1rem;
  color: var(--color-text-light);
  margin-bottom: 40px;
}

.aos-callout {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-top: 32px;
}

.aos-section-cta {
  font-size: 1.15rem;
  margin-top: 48px;
  margin-bottom: 24px;
  color: var(--color-dark);
}

/* Problem List */
.aos-problem-list {
  margin: 32px 0;
}

.aos-problem-list p {
  font-size: 1.15rem;
  font-weight: 500;
  padding: 14px 0;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-dark);
}

/* Grid Layouts */
.aos-three-col {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.aos-two-col {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 48px;
}

/* Cards */
.aos-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 32px;
}

.aos-card h3 {
  color: var(--color-dark);
  margin-bottom: 12px;
}

.aos-card p {
  color: var(--color-text);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* Fail List */
.aos-fail-list {
  margin-top: 8px;
}

.aos-fail-item {
  padding: 18px 0;
  border-bottom: 1px solid var(--color-border);
}

.aos-fail-q {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--color-dark);
  margin-bottom: 4px;
}

.aos-fail-a {
  color: var(--color-primary);
  font-size: 1rem;
  font-weight: 500;
}

/* Phase Cards */
.aos-phase-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 36px;
}

.aos-phase-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-primary);
  background: rgba(242, 51, 34, 0.08);
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  margin-bottom: 16px;
}

.aos-phase-card h3 {
  color: var(--color-dark);
  margin-bottom: 16px;
}

.aos-phase-card ul {
  list-style: none;
}

.aos-phase-card li {
  padding: 8px 0;
  padding-left: 20px;
  position: relative;
  color: var(--color-text);
  font-size: 0.95rem;
  line-height: 1.6;
}

.aos-phase-card li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 16px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-primary);
}

.aos-phase-card li strong {
  color: var(--color-dark);
}

/* Feature Grid */
.aos-feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 48px;
}

.aos-feature-card {
  background: var(--color-card-bg);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-card);
  padding: 28px 24px;
  text-align: center;
}

.aos-feature-icon {
  font-size: 2rem;
  margin-bottom: 16px;
}

.aos-feature-card h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 8px;
}

.aos-feature-card p {
  font-size: 0.85rem;
  color: var(--color-text);
  line-height: 1.5;
}

@media (max-width: 768px) {
  .aos-feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .aos-feature-grid {
    grid-template-columns: 1fr;
  }
}

/* System Cards */
.aos-system-list {
  margin-top: 40px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.aos-system-card {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  background: var(--color-card-bg);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-card);
  padding: 28px 32px;
}

.aos-system-num {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  background: #c4f042;
  color: var(--color-dark);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.1rem;
}

.aos-system-content {
  flex: 1;
}

.aos-system-content h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 6px;
}

.aos-system-content p {
  font-size: 0.9rem;
  color: var(--color-text);
  line-height: 1.6;
}

.aos-system-tag {
  flex-shrink: 0;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 5px 12px;
  border-radius: var(--radius-pill);
  border: 1.5px solid;
  align-self: center;
}

.aos-tag-positioning { color: #6b4ce0; border-color: #6b4ce0; }
.aos-tag-content { color: #2563eb; border-color: #2563eb; }
.aos-tag-revenue { color: #16a34a; border-color: #16a34a; }
.aos-tag-coaching { color: var(--color-primary); border-color: var(--color-primary); }
.aos-tag-growth { color: #ca8a04; border-color: #ca8a04; }
.aos-tag-system { color: #0891b2; border-color: #0891b2; }

.aos-system-plus {
  display: flex;
  align-items: center;
  gap: 16px;
  background: var(--color-card-bg);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-card);
  padding: 24px 32px;
}

.aos-plus-icon {
  flex-shrink: 0;
  color: #c4f042;
  font-size: 1.5rem;
  font-weight: 700;
}

.aos-system-plus p {
  font-size: 0.95rem;
  color: var(--color-dark);
  line-height: 1.6;
}

@media (max-width: 768px) {
  .aos-system-card {
    flex-wrap: wrap;
    padding: 20px 24px;
  }

  .aos-system-tag {
    align-self: flex-start;
    margin-top: 8px;
  }
}

/* For / Not For */
.aos-for-yes ul,
.aos-for-no ul {
  list-style: none;
  margin-top: 16px;
}

.aos-for-yes li,
.aos-for-no li {
  padding: 10px 0;
  padding-left: 28px;
  position: relative;
  color: var(--color-text);
  font-size: 0.95rem;
}

.aos-for-yes li::before {
  content: '\2713';
  position: absolute;
  left: 0;
  color: var(--color-green);
  font-weight: 700;
}

.aos-for-no li::before {
  content: '\2715';
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-weight: 700;
}

/* Team Grid */
.aos-team-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.aos-team-card {
  background: var(--color-card-bg);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-card);
  padding: 28px;
}

.aos-team-card h3 {
  color: var(--color-dark);
  margin-bottom: 4px;
}

.aos-team-role {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.aos-team-card p:last-child {
  font-size: 0.9rem;
  color: var(--color-text);
  line-height: 1.6;
}

/* FAQ */
.aos-faq-list {
  margin-top: 48px;
}

.aos-faq-item {
  border-bottom: 1px solid var(--color-border);
}

.aos-faq-item summary {
  padding: 24px 0;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-dark);
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.aos-faq-item summary::after {
  content: '+';
  font-size: 1.5rem;
  font-weight: 300;
  color: var(--color-text-muted);
  transition: transform 0.2s;
}

.aos-faq-item[open] summary::after {
  content: '\2212';
}

.aos-faq-item summary::-webkit-details-marker {
  display: none;
}

.aos-faq-item p {
  padding-bottom: 24px;
  color: var(--color-text);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* Final CTA */
.aos-section-final {
  padding: 120px 0;
}

.aos-scarcity {
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-top: 24px;
  margin-bottom: 32px;
}

.btn-lg {
  padding: 18px 40px;
  font-size: 1.05rem;
}

/* Responsive */
@media (max-width: 768px) {
  .aos-proof-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }

  .aos-three-col {
    grid-template-columns: 1fr;
  }

  .aos-two-col {
    grid-template-columns: 1fr;
  }

  .aos-team-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .aos-hero {
    padding: 120px 0 72px;
  }

  .aos-section {
    padding: 72px 0;
  }

  .aos-bonus-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }

  .aos-bonus-value {
    margin-left: 0;
  }
}

@media (max-width: 480px) {
  .aos-proof-grid {
    grid-template-columns: 1fr;
  }

  .aos-team-grid {
    grid-template-columns: 1fr;
  }
}