/* ==========================================================================
   Checkpoint GTM - Brain as a Service landing page (/brain)
   Page-specific components. Reuses global tokens; only builds what global.css
   and components.css don't already provide.
   Green = the brain / authority; amber (--accent-warm) is an accent stroke only,
   never body text on light (it fails AA), darkened to #B5651D where it must read.
   ========================================================================== */

.brain-accent { color: var(--accent); }
.brain-arrow { transition: transform var(--transition-fast); }
.btn:hover .brain-arrow { transform: translateX(3px); }

/* ==========================================================================
   S1 Hero - neural-network canvas behind centered copy
   ========================================================================== */
.brain-hero {
  position: relative;
  overflow: hidden;
  padding-top: calc(var(--nav-height) + var(--space-4xl));
  padding-bottom: var(--space-4xl);
}
.brain-hero__canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}
/* Soft focal wash toward the center-right where the network clusters */
.brain-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle at 78% 42%, var(--accent-subtle) 0, transparent 46%);
  opacity: 0.45;
  pointer-events: none;
  z-index: 0;
}
[data-theme="dark"] .brain-hero::before { opacity: 0.22; }
.brain-hero .container { position: relative; z-index: 1; }

.brain-hero__copy { max-width: 40rem; }
.brain-hero__eyebrow { display: inline-block; margin-bottom: var(--space-md); }
.brain-hero__title {
  font-family: var(--font-display);
  font-weight: 200;
  font-size: clamp(2.1rem, 4.6vw, 3.5rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-lg);
}
.brain-hero__sub {
  font-size: 1.1875rem;
  line-height: 1.65;
  color: var(--text-secondary);
  max-width: 54ch;
  margin-bottom: var(--space-xl);
}
.brain-hero__ctas { display: flex; gap: var(--space-md); flex-wrap: wrap; align-items: center; }
.brain-hero__micro {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-top: var(--space-lg);
}
@media (max-width: 880px) {
  .brain-hero { padding-top: calc(var(--nav-height) + var(--space-2xl)); }
}

/* ==========================================================================
   S2 Credibility strip - three sourced context lines
   ========================================================================== */
.brain-cred__overline { display: block; text-align: center; margin-bottom: var(--space-lg); }
.brain-cred__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}
.brain-cred__item {
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--text-secondary);
  padding-left: var(--space-lg);
  border-left: 2px solid var(--accent);
  margin: 0;
}
@media (max-width: 760px) {
  .brain-cred__grid { grid-template-columns: 1fr; gap: var(--space-md); }
}

/* ==========================================================================
   S3 Problem - intro + three cards
   ========================================================================== */
.brain-problem__intro {
  font-size: 1.0625rem;
  line-height: 1.7;
  color: var(--text-secondary);
  max-width: 62ch;
  margin-top: var(--space-md);
}
.brain-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
  margin-top: var(--space-2xl);
}
.brain-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
}
.brain-card__title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.1875rem;
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
}
.brain-card__body { font-size: 0.9375rem; line-height: 1.6; color: var(--text-secondary); margin: 0; }
@media (max-width: 820px) {
  .brain-cards { grid-template-columns: 1fr; }
}

/* ==========================================================================
   S4 Definition - lead paragraph + pull quote
   ========================================================================== */
.brain-def__body {
  font-size: 1.1875rem;
  line-height: 1.7;
  color: var(--text-secondary);
  max-width: 62ch;
  margin: var(--space-md) auto 0;
  text-align: center;
}
.brain-def__quote {
  max-width: 44ch;
  margin: var(--space-2xl) auto 0;
  text-align: center;
}
.brain-def__quote blockquote {
  font-family: var(--font-display);
  font-weight: 200;
  font-size: clamp(1.35rem, 2.6vw, 1.9rem);
  line-height: 1.4;
  color: var(--text-primary);
  margin: 0 0 var(--space-md);
}
.brain-def__quote blockquote::before { content: '\201C'; color: var(--accent); }
.brain-def__quote blockquote::after { content: '\201D'; color: var(--accent); }
.brain-def__quote figcaption {
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  font-weight: 600;
}

/* ==========================================================================
   S5 Brain types - five cards with inside / feeds rows
   ========================================================================== */
.brain-types__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
  margin-top: var(--space-2xl);
}
.brain-type {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
}
.brain-type:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); border-color: var(--accent-subtle); }
.brain-type__title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.25rem;
  color: var(--text-primary);
}
.brain-type__row { display: flex; flex-direction: column; gap: 0.3rem; }
.brain-type__label {
  align-self: flex-start;
  font-size: 0.625rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 700;
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-sm);
  background: var(--accent-subtle);
  color: var(--accent);
}
.brain-type__label--feeds { background: rgba(232, 152, 94, 0.16); color: #B5651D; }
[data-theme="dark"] .brain-type__label--feeds { color: var(--accent-warm); }
.brain-type__text { font-size: 0.9375rem; line-height: 1.55; color: var(--text-secondary); margin: 0; }
.brain-types__footer {
  text-align: center;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 1.1875rem;
  line-height: 1.5;
  color: var(--text-primary);
  max-width: 48ch;
  margin: var(--space-2xl) auto 0;
}
@media (max-width: 940px) {
  .brain-types__grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .brain-types__grid { grid-template-columns: 1fr; }
}

/* ==========================================================================
   S6 Anatomy - sources -> brain -> outputs, three columns + arrows
   ========================================================================== */
.brain-anatomy {
  display: grid;
  grid-template-columns: 1fr auto 1.15fr auto 1fr;
  gap: var(--space-md);
  align-items: stretch;
  margin-top: var(--space-2xl);
}
.brain-anatomy__col {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}
.brain-anatomy__col--core {
  background: #2D6A4F;
  border-color: #2D6A4F;
  justify-content: center;
}
.brain-anatomy__label {
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  font-weight: 700;
}
.brain-anatomy__label--core { color: rgba(255, 255, 255, 0.85); }
.brain-anatomy__list { display: flex; flex-direction: column; gap: 0.5rem; margin: 0; }
.brain-anatomy__list li {
  position: relative;
  padding-left: 1.1rem;
  font-size: 0.875rem;
  line-height: 1.45;
  color: var(--text-secondary);
}
.brain-anatomy__list li::before {
  content: '';
  position: absolute;
  left: 0; top: 0.5em;
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--accent);
}
.brain-anatomy__core-body { font-size: 0.9375rem; line-height: 1.6; color: #fff; margin: 0; }
.brain-anatomy__arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
}
.brain-anatomy__arrow svg { width: 40px; height: 16px; }
@media (max-width: 900px) {
  .brain-anatomy {
    grid-template-columns: 1fr;
    gap: var(--space-sm);
    max-width: 460px;
    margin-inline: auto;
  }
  .brain-anatomy__arrow { transform: rotate(90deg); padding: var(--space-xs) 0; }
}

/* ==========================================================================
   S7 Process - four numbered steps
   ========================================================================== */
.brain-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
  margin-top: var(--space-2xl);
}
.brain-step {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
}
.brain-step__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px; height: 44px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.9375rem;
  margin-bottom: var(--space-md);
}
.brain-step__title { font-family: var(--font-display); font-weight: 600; font-size: 1.0625rem; color: var(--text-primary); margin-bottom: var(--space-xs); }
.brain-step__body { font-size: 0.9375rem; line-height: 1.55; color: var(--text-secondary); margin: 0; }
@media (max-width: 940px) {
  .brain-steps { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .brain-steps { grid-template-columns: 1fr; }
}

/* ==========================================================================
   S8 Tech stack - monospace-flavored item list
   ========================================================================== */
.brain-tech__list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
  margin-top: var(--space-2xl);
  max-width: 900px;
  margin-inline: auto;
}
.brain-tech__item {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-lg) var(--space-lg) var(--space-lg) 2.75rem;
  font-size: 0.9375rem;
  line-height: 1.55;
  color: var(--text-secondary);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}
.brain-tech__item::before {
  content: '>';
  position: absolute;
  left: var(--space-lg);
  top: var(--space-lg);
  color: var(--accent);
  font-weight: 700;
}
@media (max-width: 760px) {
  .brain-tech__list { grid-template-columns: 1fr; }
}

/* ==========================================================================
   S9 Security + S10 Why Checkpoint - three proof points each
   ========================================================================== */
.brain-sec-grid,
.brain-why-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
  margin-top: var(--space-2xl);
}
.brain-sec__point h3,
.brain-why__point h3 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.125rem;
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
}
.brain-sec__point p,
.brain-why__point p { font-size: 0.9375rem; line-height: 1.6; color: var(--text-secondary); margin: 0; }
.brain-sec__point { padding-left: var(--space-lg); border-left: 2px solid var(--accent); }
@media (max-width: 820px) {
  .brain-sec-grid,
  .brain-why-grid { grid-template-columns: 1fr; gap: var(--space-lg); }
}

/* ==========================================================================
   S11 FAQ - answer-first details accordion (mirrors geo)
   ========================================================================== */
.brain-faq__list { max-width: 760px; margin-inline: auto; display: flex; flex-direction: column; gap: var(--space-sm); }
.brain-faq__item {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--bg-card);
  overflow: hidden;
  transition: border-color var(--transition-fast);
}
.brain-faq__item[open] { border-color: var(--accent); }
.brain-faq__item summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  padding: var(--space-lg);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.0625rem;
  color: var(--text-primary);
}
.brain-faq__item summary::-webkit-details-marker { display: none; }
.brain-faq__plus { font-size: 1.4rem; color: var(--accent); line-height: 1; transition: transform var(--transition-fast); flex-shrink: 0; }
.brain-faq__item[open] .brain-faq__plus { transform: rotate(45deg); }
.brain-faq__answer { padding: 0 var(--space-lg) var(--space-lg); color: var(--text-secondary); font-size: 0.9375rem; line-height: 1.65; }

/* ==========================================================================
   S12 Final CTA - forest-green panel
   ========================================================================== */
.brain-final { background: #2D6A4F; color: #fff; }
.brain-final__inner { max-width: 640px; margin-inline: auto; text-align: center; }
.brain-final h2 { color: #fff; }
.brain-final__body { color: rgba(255, 255, 255, 0.88); font-size: 1.0625rem; line-height: 1.6; margin: var(--space-md) 0 var(--space-xl); }

/* ==========================================================================
   AI mode - flatten grids and hide the decorative canvas / green panels
   ========================================================================== */
[data-theme="ai"] .brain-cred__grid,
[data-theme="ai"] .brain-cards,
[data-theme="ai"] .brain-types__grid,
[data-theme="ai"] .brain-anatomy,
[data-theme="ai"] .brain-steps,
[data-theme="ai"] .brain-tech__list,
[data-theme="ai"] .brain-sec-grid,
[data-theme="ai"] .brain-why-grid { grid-template-columns: 1fr !important; }
[data-theme="ai"] .brain-hero__canvas { display: none !important; }
[data-theme="ai"] .brain-anatomy__arrow { display: none !important; }
[data-theme="ai"] .brain-anatomy__col--core { background: var(--bg-secondary) !important; border-color: var(--border) !important; }
[data-theme="ai"] .brain-anatomy__label--core,
[data-theme="ai"] .brain-anatomy__core-body { color: var(--text-primary) !important; }
[data-theme="ai"] .brain-final { background: var(--bg-primary) !important; color: var(--text-primary) !important; }
[data-theme="ai"] .brain-final h2,
[data-theme="ai"] .brain-final__body { color: var(--text-primary) !important; }

/* Reduced motion - hero canvas draws a single static frame in JS; nothing to
   disable in CSS beyond the shared .reveal states handled globally. */