/* ============================================
   Brain Page — CodyMaster Smart Memory System
   Uses kit.css design tokens & patterns
   ============================================ */

/* --- Brain-specific accent --- */
:root {
  --brain-400: #c084fc;
  --brain-500: #a855f7;
  --brain-600: #9333ea;
  --brain-glow: rgba(168, 85, 247, 0.25);
}

/* --- Brain Hero --- */
.brain-hero {
  position: relative;
  min-height: 700px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 100px var(--section-padding-x) 60px;
  overflow: hidden;
  text-align: center;
}

.brain-hero__orbs {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

.brain-hero__orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  animation: orbFloat 8s ease-in-out infinite;
}

.brain-hero__orb--purple {
  top: 15%;
  left: 30%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(168, 85, 247, 0.3) 0%, rgba(124, 58, 237, 0.15) 50%, transparent 100%);
}

.brain-hero__orb--blue {
  top: 40%;
  right: 20%;
  width: 350px;
  height: 350px;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.2) 0%, transparent 100%);
  animation-delay: -4s;
}

.brain-hero__content {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
  max-width: 850px;
}

.brain-hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(168, 85, 247, 0.3);
  background: rgba(168, 85, 247, 0.08);
  animation: fadeInUp 0.6s ease-out;
}

.brain-hero__badge-icon {
  width: 18px;
  height: 18px;
  color: var(--brain-400);
}

.brain-hero__badge-text {
  font-size: 13px;
  font-weight: 500;
  color: var(--brain-400);
}

.brain-hero__title {
  font-family: var(--font-display);
  font-size: clamp(36px, 5vw, 60px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -1px;
  animation: fadeInUp 0.6s ease-out 0.1s both;
}

.brain-hero__highlight {
  background: linear-gradient(135deg, var(--brain-400), var(--accent-cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.brain-hero__strike {
  text-decoration: line-through;
  text-decoration-color: var(--accent-red);
  text-decoration-thickness: 3px;
  color: var(--text-muted);
  -webkit-text-fill-color: var(--text-muted);
  opacity: 0.6;
}

.brain-hero__subtitle {
  font-size: clamp(16px, 1.5vw, 19px);
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 700px;
  animation: fadeInUp 0.6s ease-out 0.2s both;
}

.brain-hero__subtitle strong {
  color: var(--text-primary);
}

/* --- Brain Visualization --- */
.brain-viz {
  position: relative;
  width: 220px;
  height: 220px;
  margin: 20px auto 0;
  animation: fadeInUp 0.6s ease-out 0.3s both;
}

.brain-viz__core {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(168, 85, 247, 0.15) 0%, transparent 70%);
  border: 2px solid rgba(168, 85, 247, 0.3);
  box-shadow: 0 0 60px rgba(168, 85, 247, 0.15);
}

.brain-viz__icon {
  width: 64px;
  height: 64px;
  color: var(--brain-400);
  animation: neuronPulse 3s ease-in-out infinite;
}

@keyframes neuronPulse {
  0%, 100% { transform: scale(1); opacity: 0.8; }
  50% { transform: scale(1.08); opacity: 1; }
}

.brain-viz__label {
  position: absolute;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.brain-viz__label--top    { top: -30px; left: 50%; transform: translateX(-50%); color: var(--accent-green); }
.brain-viz__label--right  { right: -70px; top: 50%; transform: translateY(-50%); color: var(--accent-blue); }
.brain-viz__label--bottom { bottom: -30px; left: 50%; transform: translateX(-50%); color: var(--brain-400); }
.brain-viz__label--left   { left: -55px; top: 50%; transform: translateY(-50%); color: var(--accent-cyan); }

.brain-viz__dot {
  position: absolute;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  animation: synapsePulse 2.5s ease-in-out infinite;
}

.brain-viz__dot--top    { top: -4px; left: 50%; transform: translateX(-50%); background: var(--accent-green); }
.brain-viz__dot--right  { right: -4px; top: 50%; transform: translateY(-50%); background: var(--accent-blue); animation-delay: 0.6s; }
.brain-viz__dot--bottom { bottom: -4px; left: 50%; transform: translateX(-50%); background: var(--brain-400); animation-delay: 1.2s; }
.brain-viz__dot--left   { left: -4px; top: 50%; transform: translateY(-50%); background: var(--accent-cyan); animation-delay: 1.8s; }

@keyframes synapsePulse {
  0%, 100% { transform: translateX(-50%) scale(1); opacity: 0.6; }
  50% { transform: translateX(-50%) scale(1.5); opacity: 1; }
}

.brain-viz__dot--right  { animation-name: synapsePulseY; }
.brain-viz__dot--left   { animation-name: synapsePulseY; }

@keyframes synapsePulseY {
  0%, 100% { transform: translateY(-50%) scale(1); opacity: 0.6; }
  50% { transform: translateY(-50%) scale(1.5); opacity: 1; }
}

/* --- Problem Section --- */
.brain-problem__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.brain-problem__card {
  padding: 28px;
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  gap: 16px;
  transition: all var(--transition-normal);
}

.brain-problem__card:hover {
  transform: translateY(-4px);
  border-color: rgba(239, 68, 68, 0.3);
  box-shadow: 0 8px 32px rgba(239, 68, 68, 0.08);
}

.brain-problem__card-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: rgba(239, 68, 68, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-red);
}

.brain-problem__card-icon svg {
  width: 22px;
  height: 22px;
}

.brain-problem__card-title {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
}

.brain-problem__card-desc {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* --- Memory Tiers --- */
.brain-tiers__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.brain-tier {
  padding: 32px;
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  text-align: center;
  transition: all var(--transition-normal);
}

.brain-tier:hover {
  transform: translateY(-4px);
  border-color: var(--border-hover);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.brain-tier__icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
}

.brain-tier__icon svg {
  width: 28px;
  height: 28px;
  stroke: white;
}

.brain-tier__icon--sensory {
  background: linear-gradient(135deg, var(--brain-500), var(--accent-blue));
}

.brain-tier__icon--working {
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
}

.brain-tier__icon--longterm {
  background: linear-gradient(135deg, var(--accent-green), var(--accent-cyan));
}

.brain-tier__title {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
}

.brain-tier__meta {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--brain-400);
}

.brain-tier__desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.brain-tier__analogy {
  font-size: 13px;
  color: var(--text-muted);
  font-style: italic;
}

/* --- Smart Decay (Ebbinghaus) --- */
.brain-decay {
  background: linear-gradient(180deg, var(--bg-page) 0%, var(--bg-card) 50%, var(--bg-page) 100%);
}

.brain-decay__content {
  max-width: 800px;
  margin: 0 auto;
}

.brain-decay__timeline {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-top: 40px;
}

.brain-decay__item {
  display: flex;
  align-items: center;
  gap: 20px;
}

.brain-decay__label {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-secondary);
  min-width: 100px;
  text-align: right;
}

.brain-decay__bar-wrap {
  flex: 1;
  height: 32px;
  background: rgba(255, 255, 255, 0.04);
  border-radius: var(--radius-sm);
  overflow: hidden;
  position: relative;
}

.brain-decay__bar {
  height: 100%;
  border-radius: var(--radius-sm);
  transition: width 1.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  display: flex;
  align-items: center;
  padding: 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--bg-page);
  white-space: nowrap;
}

.brain-decay__bar--1 { width: 100%; background: linear-gradient(90deg, var(--accent-red), #f87171); }
.brain-decay__bar--2 { width: 70%;  background: linear-gradient(90deg, var(--cta-orange), #fbbf24); }
.brain-decay__bar--3 { width: 40%;  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-green)); }
.brain-decay__bar--4 { width: 20%;  background: linear-gradient(90deg, var(--accent-green), var(--accent-lime)); }

.brain-decay__note {
  font-size: 13px;
  color: var(--text-muted);
  min-width: 120px;
}

/* --- Self-Healing --- */
.brain-heal__flow {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 40px;
}

.brain-heal__step {
  padding: 28px 20px;
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  text-align: center;
  position: relative;
  transition: all var(--transition-normal);
}

.brain-heal__step:hover {
  transform: translateY(-4px);
  border-color: var(--border-hover);
}

.brain-heal__step-number {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  color: white;
}

.brain-heal__step-number--1 { background: var(--accent-red); }
.brain-heal__step-number--2 { background: var(--cta-orange); }
.brain-heal__step-number--3 { background: var(--accent-cyan); }
.brain-heal__step-number--4 { background: var(--accent-green); }

.brain-heal__step-icon {
  width: 28px;
  height: 28px;
}

.brain-heal__step-icon--1 { color: var(--accent-red); }
.brain-heal__step-icon--2 { color: var(--cta-orange); }
.brain-heal__step-icon--3 { color: var(--accent-cyan); }
.brain-heal__step-icon--4 { color: var(--accent-green); }

.brain-heal__step-title {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
}

.brain-heal__step-desc {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* Arrow between steps */
.brain-heal__step:not(:last-child)::after {
  content: '→';
  position: absolute;
  right: -18px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 20px;
  color: var(--text-muted);
}

/* --- Comparison Table --- */
.brain-compare__table {
  width: 100%;
  max-width: 900px;
  margin: 40px auto 0;
  border-collapse: separate;
  border-spacing: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-subtle);
}

.brain-compare__table th,
.brain-compare__table td {
  padding: 16px 24px;
  text-align: left;
  border-bottom: 1px solid var(--border-subtle);
}

.brain-compare__table th {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  background: var(--bg-card);
}

.brain-compare__table th:nth-child(2) {
  color: var(--text-muted);
}

.brain-compare__table th:nth-child(3) {
  color: var(--brain-400);
}

.brain-compare__table td {
  font-size: 15px;
  color: var(--text-secondary);
  background: var(--bg-page);
}

.brain-compare__table td:first-child {
  font-weight: 600;
  color: var(--text-primary);
  font-size: 14px;
}

.brain-compare__table td:nth-child(3) {
  color: var(--accent-green);
  font-weight: 500;
}

.brain-compare__table tr:last-child td {
  border-bottom: none;
}

/* --- Scope Filtering --- */
.brain-scope__terminal {
  max-width: 700px;
  margin: 40px auto 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-subtle);
  background: var(--bg-code);
}

.brain-scope__terminal-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  background: rgba(0, 0, 0, 0.3);
}

.brain-scope__dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.brain-scope__dot--red    { background: #ef4444; }
.brain-scope__dot--yellow { background: #eab308; }
.brain-scope__dot--green  { background: #22c55e; }

.brain-scope__terminal-title {
  flex: 1;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-muted);
}

.brain-scope__code {
  padding: 20px;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.8;
  color: var(--text-secondary);
}

.brain-scope__code .highlight { color: var(--accent-lime); }
.brain-scope__code .dimmed    { color: var(--text-muted); opacity: 0.5; }
.brain-scope__code .accent    { color: var(--brain-400); }
.brain-scope__code .result    { color: var(--accent-green); }

/* --- Brain CTA --- */
.brain-cta {
  padding: var(--section-padding-y) var(--section-padding-x);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
  background: radial-gradient(ellipse at center, rgba(168, 85, 247, 0.1) 0%, transparent 70%);
}

.brain-cta__title {
  font-family: var(--font-display);
  font-size: clamp(28px, 3vw, 40px);
  font-weight: 700;
  line-height: 1.2;
}

.brain-cta__subtitle {
  font-size: 18px;
  color: var(--text-secondary);
  max-width: 600px;
}

.btn--brain {
  background: linear-gradient(135deg, var(--brain-500), var(--brain-600));
  color: white;
  box-shadow: 0 4px 24px var(--brain-glow);
}

.btn--brain:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 40px rgba(168, 85, 247, 0.4);
}

/* --- Nav Active State for Brain --- */
.nav__link--brain {
  color: var(--brain-400) !important;
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav__link--brain:hover {
  color: var(--brain-400) !important;
  opacity: 0.8;
}

.nav__link--brain svg {
  width: 16px;
  height: 16px;
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  .brain-problem__grid,
  .brain-tiers__grid {
    grid-template-columns: 1fr;
  }

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

  .brain-heal__step::after {
    display: none;
  }

  .brain-hero {
    padding: 80px 24px 40px;
    min-height: auto;
  }

  .brain-viz {
    width: 180px;
    height: 180px;
  }

  .brain-viz__icon {
    width: 48px;
    height: 48px;
  }

  .brain-viz__label--right { right: -60px; }
  .brain-viz__label--left  { left: -45px; }
}

@media (max-width: 640px) {
  .brain-heal__flow {
    grid-template-columns: 1fr;
  }

  .brain-compare__table {
    font-size: 13px;
  }

  .brain-compare__table th,
  .brain-compare__table td {
    padding: 12px 14px;
  }

  .brain-decay__item {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .brain-decay__label {
    text-align: left;
    min-width: auto;
  }

  .brain-decay__note {
    min-width: auto;
  }
}