/* ============================================
   CASTELANO.COM.BR — Academic Tech Theme
   Blue accent · Sora + IBM Plex Mono
   ============================================ */

:root {
  --bg-primary: #0c0f14;
  --bg-secondary: #12161e;
  --bg-tertiary: #1a1f2a;
  --bg-card: #151a24;
  --bg-elevated: #1a2030;

  /* Acento azul acadêmico (alias --blue-neon para compatibilidade) */
  --accent: #3b9eff;
  --accent-dim: #2563eb;
  --accent-deep: #1e40af;
  --accent-soft: rgba(59, 158, 255, 0.12);
  --accent-border: rgba(59, 158, 255, 0.35);
  --accent-glow: rgba(59, 158, 255, 0.28);
  --blue-neon: var(--accent);
  --blue-royal: #3b82f6;
  --blue-deep: #1e40af;
  --blue-glow: var(--accent-glow);

  --text-primary: #e8eaed;
  --text-secondary: #9aa3b2;
  --text-tertiary: #6b7380;

  --border: rgba(255, 255, 255, 0.07);
  --border-hover: rgba(59, 158, 255, 0.45);

  --gradient-primary: linear-gradient(135deg, #38bdf8 0%, #2563eb 100%);
  --gradient-secondary: linear-gradient(135deg, #1d4ed8 0%, #1e3a8a 100%);
  --gradient-glow: radial-gradient(ellipse at 30% 0%, rgba(59, 158, 255, 0.14), transparent 55%);

  /* Accents distintos por disciplina */
  --disc-bd: #38bdf8;
  --disc-lpoo: #f59e0b;
  --disc-lpbd: #818cf8;
  --disc-alpoo: #a78bfa;

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.5);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  --font-sans: 'Sora', system-ui, sans-serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, monospace;

  --transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
  --nav-h: 4.5rem;
}

*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

* {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  scroll-padding-top: 8rem;
  color-scheme: dark;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
}

/* Atmosfera: grid sutil + glow */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(59, 158, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(59, 158, 255, 0.035) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
  z-index: 0;
  mask-image: radial-gradient(ellipse at 50% 20%, black 20%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at 50% 20%, black 20%, transparent 75%);
}

body::after {
  content: '';
  position: fixed;
  top: -40%;
  left: -30%;
  width: 160%;
  height: 120%;
  background: var(--gradient-glow);
  pointer-events: none;
  z-index: 0;
}

.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 2rem;
  position: relative;
  z-index: 1;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.15;
}

h1 { font-size: clamp(2.25rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.75rem, 4vw, 2.5rem); }
h3 { font-size: clamp(1.15rem, 2.5vw, 1.35rem); }

.gradient-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: inline-block;
}

.logo-accent,
.text-accent { color: var(--accent); }

.li-icon {
  color: var(--accent);
  width: 16px;
  margin-right: 0.35rem;
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

/* ===== Navigation ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 1rem 0;
  transition: var(--transition);
}

.navbar.scrolled {
  background: rgba(12, 15, 20, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  padding: 0.65rem 0;
}

.nav-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
  flex-shrink: 0;
}

.theme-toggle:hover {
  color: var(--accent);
  border-color: var(--border-hover);
}

.theme-toggle .icon-sun { display: none; }
.theme-toggle .icon-moon { display: inline-block; }

html[data-theme="light"] .theme-toggle .icon-sun { display: inline-block; }
html[data-theme="light"] .theme-toggle .icon-moon { display: none; }

.logo {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-primary);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: var(--transition);
}

.logo:hover { transform: translateY(-1px); }

.logo-dot {
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--accent-glow);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.65; transform: scale(1.15); }
}

.nav-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
  align-items: center;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  transition: var(--transition);
  position: relative;
}

.nav-links a:hover { color: var(--text-primary); }

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--accent);
  transition: width 0.3s ease;
}

.nav-links a:hover::after { width: 100%; }

.menu-toggle {
  display: none;
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
}

/* ===== Hero ===== */
.hero {
  padding: 6.5rem 0 3.5rem;
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.95fr;
  grid-template-areas: "content photo";
  gap: 3rem;
  align-items: center;
}

.hero-content { grid-area: content; }
.hero-photo-wrapper { grid-area: photo; }

@media (min-width: 969px) {
  .hero-grid {
    grid-template-columns: 0.95fr 1.15fr;
    grid-template-areas: "photo content";
  }
}

.brand-signal {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.hero-photo-wrapper {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-photo {
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: var(--gradient-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  border: 2px solid rgba(59, 158, 255, 0.4);
}

.hero-photo::before {
  content: '';
  position: absolute;
  inset: -3px;
  background: var(--gradient-primary);
  border-radius: 50%;
  z-index: -1;
  opacity: 0.55;
}

.orbit-ring {
  position: absolute;
  border: 1px solid rgba(59, 158, 255, 0.2);
  border-radius: 50%;
  animation: rotate 22s linear infinite;
  pointer-events: none;
}

.orbit-ring.ring-1 { width: 360px; height: 360px; }
.orbit-ring.ring-2 { width: 420px; height: 420px; animation-duration: 32s; animation-direction: reverse; }

.orbit-dot {
  position: absolute;
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 50%;
  top: 50%;
  left: -4px;
  transform: translateY(-50%);
}

@keyframes rotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.hero-content .tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0.9rem;
  background: var(--accent-soft);
  border: 1px solid var(--accent-border);
  border-radius: 999px;
  font-size: 0.8rem;
  color: var(--accent);
  margin-bottom: 1.25rem;
  font-weight: 500;
}

.tag-pulse {
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

.hero-content h1 {
  margin-bottom: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.15em;
}

.hero-title-line {
  display: block;
  font-size: 0.58em;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.25;
  color: var(--text-primary);
}

.hero-title-prefix {
  font-weight: 500;
  font-size: 0.78em;
  color: var(--text-tertiary);
  letter-spacing: 0.01em;
  margin-right: 0.2em;
}

.hero-title-name {
  font-size: 1em;
  line-height: 1.05;
}

.hero-content .subtitle {
  font-size: clamp(0.78rem, 2.4vw, 1.15rem);
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
  font-weight: 400;
  white-space: nowrap;
  letter-spacing: -0.01em;
}

.hero-description {
  color: var(--text-tertiary);
  font-size: 1.05rem;
  margin-bottom: 1.75rem;
  max-width: 34rem;
}

.hero-description strong { color: var(--text-primary); }

.hero-consult {
  margin-top: 1.25rem;
  font-size: 0.85rem;
  color: var(--text-tertiary);
}

.hero-consult a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: var(--transition);
}

.hero-consult a:hover { border-bottom-color: var(--accent); }

.tech-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.75rem;
}

.tech-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.4rem 0.85rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 0.8rem;
  color: var(--text-secondary);
  font-weight: 500;
  opacity: 0;
  transform: translateY(12px);
  animation: chip-appear 0.45s forwards;
}

.tech-chip i {
  color: var(--accent);
  font-size: 0.85rem;
  width: 0.95rem;
  text-align: center;
}

.tech-chip:hover {
  border-color: var(--border-hover);
  color: var(--accent);
}

.tech-chip:hover i {
  color: var(--accent);
}

@keyframes chip-appear {
  to { opacity: 1; transform: translateY(0); }
}

.btn-group {
  display: flex;
  gap: 0.85rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 1.5rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
  transition: var(--transition);
  cursor: pointer;
  border: none;
  font-family: var(--font-sans);
  min-height: 44px;
}

.btn-primary {
  background: var(--gradient-primary);
  color: #0b1220;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(59, 158, 255, 0.35);
}

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  border-color: var(--border-hover);
  color: var(--accent);
  transform: translateY(-2px);
}

/* ===== Sections ===== */
.section { padding: 5rem 0; }

.section-header {
  text-align: center;
  margin-bottom: 3rem;
}

.section-label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  display: block;
  margin-bottom: 0.75rem;
}

.section-title { margin-bottom: 0.75rem; }

.section-subtitle {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 560px;
  margin: 0 auto;
}

/* ===== Glass / elevated surfaces ===== */
.glass-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.glass-card:hover {
  border-color: var(--border-hover);
}

/* ===== Semester blocks + discipline cards ===== */
.semester-block {
  margin-bottom: 2.75rem;
}

.semester-block:last-child { margin-bottom: 0; }

.semester-heading {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
  letter-spacing: -0.01em;
}

.semester-num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid var(--accent-border);
  padding: 0.2rem 0.55rem;
  border-radius: 6px;
}

.disciplines-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

@media (min-width: 700px) {
  .disciplines-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.15rem;
  }
}

.discipline-card {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding: 1.25rem 1.35rem;
  min-height: 44px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  text-decoration: none;
  color: inherit;
  transition: border-color 0.25s ease, background 0.25s ease;
  position: relative;
  overflow: hidden;
}

.discipline-card::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--disc-accent, var(--accent));
  opacity: 0.85;
}

.discipline-card.accent-bd { --disc-accent: var(--disc-bd); }
.discipline-card.accent-lpoo { --disc-accent: var(--disc-lpoo); }
.discipline-card.accent-lpbd { --disc-accent: var(--disc-lpbd); }
.discipline-card.accent-alpoo { --disc-accent: var(--disc-alpoo); }

.discipline-card.accent-bd .discipline-icon-sm {
  color: var(--disc-bd);
  background: rgba(56, 189, 248, 0.12);
  border-color: rgba(56, 189, 248, 0.3);
}
.discipline-card.accent-lpoo .discipline-icon-sm {
  color: var(--disc-lpoo);
  background: rgba(245, 158, 11, 0.12);
  border-color: rgba(245, 158, 11, 0.3);
}
.discipline-card.accent-lpbd .discipline-icon-sm {
  color: var(--disc-lpbd);
  background: rgba(129, 140, 248, 0.12);
  border-color: rgba(129, 140, 248, 0.3);
}
.discipline-card.accent-alpoo .discipline-icon-sm {
  color: var(--disc-alpoo);
  background: rgba(167, 139, 250, 0.12);
  border-color: rgba(167, 139, 250, 0.3);
}

.discipline-card:hover {
  border-color: rgba(59, 158, 255, 0.35);
  background: #1c2330;
}

.discipline-card.accent-bd:hover { border-color: rgba(56, 189, 248, 0.45); }
.discipline-card.accent-lpoo:hover { border-color: rgba(245, 158, 11, 0.45); }
.discipline-card.accent-lpbd:hover { border-color: rgba(129, 140, 248, 0.45); }
.discipline-card.accent-alpoo:hover { border-color: rgba(167, 139, 250, 0.45); }

.discipline-card:hover .discipline-arrow {
  color: var(--disc-accent);
  transform: translateX(3px);
}

.discipline-card-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
}

.discipline-code {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--disc-accent, var(--accent));
  letter-spacing: 0.04em;
  font-weight: 500;
}

.discipline-lessons {
  font-size: 0.78rem;
  color: var(--text-tertiary);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  white-space: nowrap;
}

.discipline-card-body {
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-rows: auto auto;
  column-gap: 0.85rem;
  row-gap: 0.35rem;
  align-items: start;
}

.discipline-icon-sm {
  grid-row: 1 / span 2;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
  color: var(--disc-accent, var(--accent));
  background: var(--accent-soft);
  border: 1px solid var(--accent-border);
}

.discipline-card-body h3 {
  font-size: 1.15rem;
  margin: 0;
  align-self: end;
}

.discipline-card-body p {
  grid-column: 2;
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin: 0;
  line-height: 1.45;
}

.discipline-card-foot {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
  padding-top: 0.85rem;
  border-top: 1px solid var(--border);
  margin-top: auto;
}

.discipline-arrow {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-tertiary);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  white-space: nowrap;
  transition: var(--transition);
}

.tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.tech-tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.tech-tag i {
  color: var(--accent);
  font-size: 0.8rem;
  width: 0.9rem;
  text-align: center;
}

/* ===== Profile ===== */
.profile-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-bottom: 3rem;
}

.profile-tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--border);
  overflow-x: auto;
}

.tab-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  padding: 0.75rem 1.25rem;
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  position: relative;
  transition: var(--transition);
  white-space: nowrap;
  font-family: var(--font-sans);
}

.tab-btn:hover { color: var(--text-primary); }

.tab-btn.active { color: var(--accent); }

.tab-btn.active::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-primary);
}

.tab-content { display: none; animation: fadeIn 0.4s ease; }
.tab-content.active { display: block; }

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.profile-item-v2 {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1.25rem;
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--border);
  align-items: start;
}

.profile-item-v2:last-child { border-bottom: none; }

.profile-icon-box {
  width: 48px;
  height: 48px;
  min-width: 48px;
  border-radius: var(--radius-md);
  background: var(--accent-soft);
  border: 1px solid var(--accent-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-size: 1.15rem;
  transition: var(--transition);
}

.profile-item-v2:hover .profile-icon-box {
  background: var(--gradient-primary);
  color: #0b1220;
  border-color: transparent;
}

.profile-body h4 { margin-bottom: 0.4rem; }
.profile-body .institution { color: var(--accent); font-size: 0.9rem; margin-bottom: 0.25rem; }
.profile-body .period {
  color: var(--text-tertiary);
  font-size: 0.85rem;
  font-family: var(--font-mono);
  margin-bottom: 0.5rem;
}
.profile-body > p { color: var(--text-secondary); margin-bottom: 0.75rem; }
.profile-body ul {
  padding-left: 0;
  list-style: none;
  color: var(--text-secondary);
  font-size: 0.9rem;
}
.profile-body ul li { margin-bottom: 0.4rem; }

/* ===== Timeline ===== */
.timeline {
  position: relative;
  padding: 2rem 0 1rem;
  max-width: 900px;
  margin: 0 auto;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, transparent, rgba(59, 158, 255, 0.35) 10%, rgba(59, 158, 255, 0.35) 90%, transparent);
  transform: translateX(-50%);
}

.timeline-item {
  position: relative;
  width: 50%;
  padding: 0 2.5rem 3rem;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.timeline-item.active {
  opacity: 1;
  transform: translateY(0);
}

.timeline-item.left { left: 0; text-align: right; }
.timeline-item.right { left: 50%; text-align: left; }

.timeline-item::before {
  content: '';
  position: absolute;
  top: 1.5rem;
  width: 14px;
  height: 14px;
  background: var(--bg-primary);
  border: 2px solid var(--accent);
  border-radius: 50%;
  z-index: 2;
  transition: var(--transition);
}

.timeline-item.left::before { right: -7px; }
.timeline-item.right::before { left: -7px; }

.timeline-item:hover::before {
  background: var(--accent);
  transform: scale(1.25);
}

.timeline-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  transition: var(--transition);
  position: relative;
}

.timeline-item.left .timeline-card { margin-left: auto; }

.timeline-card::after {
  content: '';
  position: absolute;
  top: 1.75rem;
  width: 0;
  height: 0;
  border: 8px solid transparent;
}

.timeline-item.left .timeline-card::after {
  right: -16px;
  border-left-color: var(--border);
}

.timeline-item.right .timeline-card::after {
  left: -16px;
  border-right-color: var(--border);
}

.timeline-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-3px);
}

.timeline-year {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 0.25rem 0.75rem;
  background: var(--accent-soft);
  border: 1px solid var(--accent-border);
  border-radius: 999px;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

.timeline-card h4 {
  font-size: 1rem;
  margin-bottom: 0.35rem;
}

.timeline-card .institution {
  color: var(--accent);
  font-size: 0.85rem;
  margin-bottom: 0.5rem;
}

.timeline-card p {
  color: var(--text-secondary);
  font-size: 0.88rem;
  line-height: 1.5;
}

.timeline-icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: var(--accent-soft);
  border: 1px solid var(--accent-border);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

.timeline-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.85rem;
  color: var(--accent);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 500;
  transition: var(--transition);
}

.timeline-link:hover { gap: 0.65rem; }

.timeline-link .link-ext { font-size: 0.7rem; opacity: 0.7; }

@media (max-width: 768px) {
  .timeline::before {
    left: 20px;
    transform: none;
  }

  .timeline-item {
    width: 100%;
    padding: 0 0 2rem 3.5rem;
    text-align: left !important;
  }

  .timeline-item.left,
  .timeline-item.right { left: 0; }

  .timeline-item::before {
    left: 13px;
    right: auto;
  }

  .timeline-item.left .timeline-card,
  .timeline-item.right .timeline-card { margin-left: 0; }

  .timeline-card::after { display: none; }
}

/* ===== Lessons ===== */
.lessons-section {
  padding: 2.25rem 0 3.5rem;
  min-height: auto;
}

.lessons-section + .lessons-section {
  padding-top: 3.5rem;
  border-top: 1px solid var(--border);
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
  transition: var(--transition);
  min-height: 44px;
}

.back-link:hover { color: var(--accent); transform: translateX(-3px); }

.lesson-hero {
  text-align: center;
  margin-bottom: 2.5rem;
}

.lesson-hero .badge {
  display: inline-block;
  padding: 0.35rem 0.9rem;
  background: var(--accent-soft);
  border: 1px solid var(--accent-border);
  border-radius: 999px;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  margin-bottom: 1.25rem;
}

.lesson-hero h1 { margin-bottom: 0.85rem; }

.lesson-hero p {
  color: var(--text-secondary);
  max-width: 700px;
  margin: 0 auto;
  font-size: 1.05rem;
}

/* Datas importantes — painel logo após o título da disciplina */
.dates-panel {
  max-width: 900px;
  margin: 0 auto 2.25rem;
  padding: 1.25rem 1.35rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  border-left: 3px solid var(--accent);
}

.dates-panel-head {
  margin-bottom: 1rem;
}

.dates-panel-title {
  font-size: 1rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0 0 0.25rem;
  color: var(--text-primary);
}

.dates-panel-title i {
  color: var(--accent);
}

.dates-panel-hint {
  margin: 0;
  font-size: 0.8rem;
  color: var(--text-tertiary);
}

.dates-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.35rem;
}

.dates-list li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.65rem 0.75rem;
  border-radius: var(--radius-sm);
  background: var(--bg-primary);
  border: 1px solid var(--border);
  min-height: 44px;
}

.date-event {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-primary);
}

.date-value {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 500;
  white-space: nowrap;
  color: var(--accent);
}

.date-tba {
  color: var(--text-tertiary);
  background: rgba(255, 255, 255, 0.04);
  border: 1px dashed var(--border);
  border-radius: 999px;
  padding: 0.2rem 0.65rem;
}

html[data-theme="light"] .dates-list li {
  background: var(--bg-secondary);
}

html[data-theme="light"] .date-tba {
  background: rgba(15, 23, 42, 0.04);
}

.lessons-container {
  max-width: 900px;
  margin: 0 auto;
}

.lesson-item {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: start;
  gap: 0.85rem 1.15rem;
  padding: 1.1rem 1.25rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin-bottom: 0.65rem;
  transition: var(--transition);
  color: inherit;
  position: relative;
  overflow: hidden;
}

.lesson-item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--gradient-primary);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.lesson-item:hover {
  border-color: var(--border-hover);
  transform: translateX(3px);
}

.lesson-item:hover::before { opacity: 1; }

.lesson-icon {
  width: 42px;
  height: 42px;
  min-width: 42px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-soft);
  border: 1px solid var(--accent-border);
  color: var(--accent);
  font-size: 1rem;
  transition: var(--transition);
  margin-top: 0.1rem;
}

.lesson-item:hover .lesson-icon {
  background: var(--gradient-primary);
  color: #0b1220;
  border-color: transparent;
}

.lesson-info {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.lesson-heading-row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.4rem 0.75rem;
}

.lesson-number {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent);
  font-weight: 600;
}

.lesson-title {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-primary);
  margin: 0;
  line-height: 1.3;
}

.lesson-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem 0.85rem;
}

.lesson-duration {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-tertiary);
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  white-space: nowrap;
}

.lesson-downloads {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-tertiary);
  display: none;
  align-items: center;
  gap: 0.3rem;
  opacity: 0.85;
  flex-basis: 100%;
}

html.stats-visible .lesson-downloads {
  display: inline-flex;
}

.lesson-downloads i {
  font-size: 0.65rem;
}

.lesson-topics {
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.4;
  margin: 0;
}

.lesson-actions {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 0.4rem;
  min-width: 5.75rem;
}

.lesson-download,
.lesson-ref {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
  text-decoration: none;
  transition: var(--transition);
  min-height: 36px;
  white-space: nowrap;
}

.lesson-download {
  background: var(--accent-soft);
  border: 1px solid var(--accent-border);
  color: var(--accent);
}

.lesson-ref {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-secondary);
}

.lesson-ref:hover {
  border-color: var(--border-hover);
  color: var(--accent);
}

.lesson-item:hover .lesson-download {
  background: rgba(59, 158, 255, 0.2);
}

@media (max-width: 640px) {
  .lesson-item {
    grid-template-columns: auto 1fr;
  }

  .lesson-actions {
    grid-column: 1 / -1;
    flex-direction: row;
    min-width: 0;
  }

  .lesson-download,
  .lesson-ref { flex: 1; }
}

/* ===== Sticky discipline jump nav (semester pages) ===== */
.semester-jump {
  position: sticky;
  top: var(--nav-h);
  z-index: 900;
  background: rgba(12, 15, 20, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 0.65rem 0;
  margin-top: 4.25rem;
}

.semester-jump-inner {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.semester-jump-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-right: 0.35rem;
  white-space: nowrap;
}

.semester-jump a {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 0.35rem 0.85rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.8rem;
  font-weight: 500;
  white-space: nowrap;
  transition: var(--transition);
}

.semester-jump a:hover,
.semester-jump a:focus-visible {
  color: var(--accent);
  border-color: var(--accent-border);
  background: var(--accent-soft);
}

/* ===== Market section (semester pages) ===== */
.market-card {
  margin-top: 3.5rem;
  padding: 2.5rem;
}

.market-card h3 { margin-bottom: 1rem; }

.market-card > p {
  color: var(--text-secondary);
  max-width: none;
  width: 100%;
  margin-bottom: 2rem;
  text-align: justify;
  hyphens: auto;
  -webkit-hyphens: auto;
}

.market-item p {
  color: var(--text-tertiary);
  font-size: 0.85rem;
  line-height: 1.55;
  text-align: justify;
  hyphens: auto;
  -webkit-hyphens: auto;
}

.market-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.25rem;
  margin-bottom: 2rem;
}

.market-item {
  background: rgba(12, 15, 20, 0.5);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  transition: var(--transition);
}

.market-item:hover {
  border-color: var(--border-hover);
  transform: translateY(-3px);
}

.market-item i {
  color: var(--accent);
  font-size: 1.35rem;
  margin-bottom: 0.85rem;
  display: inline-block;
}

.market-item h4 { font-size: 0.95rem; margin-bottom: 0.4rem; }

@media (max-width: 640px) {
  .market-card > p,
  .market-item p {
    text-align: left;
    hyphens: manual;
  }
}

.market-label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-tertiary);
  margin-bottom: 0.75rem;
  display: block;
}

/* Profissões + salários (links externos) */
.market-careers {
  margin: 0 0 2rem;
  padding: 1.35rem 1.5rem;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
}

.market-subheading {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 0.85rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-primary);
}

.market-subheading i { color: var(--accent); }

.career-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0 0 1rem;
  padding: 0;
}

.career-list li {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.35rem 0.8rem;
}

.salary-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--accent);
  font-size: 0.88rem;
  font-weight: 600;
  text-decoration: none;
  min-height: 40px;
  transition: var(--transition);
}

.salary-link:hover { gap: 0.65rem; }

.salary-note {
  margin-top: 0.55rem;
  font-size: 0.75rem;
  color: var(--text-tertiary);
  text-align: left !important;
  max-width: none !important;
}

/* ===== Footer ===== */
.footer {
  padding: 3rem 0 2rem;
  border-top: 1px solid var(--border);
  text-align: center;
  color: var(--text-tertiary);
  font-size: 0.9rem;
  position: relative;
  z-index: 1;
}

.page-views {
  margin-top: 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-tertiary);
  opacity: 0.7;
  display: none;
  align-items: center;
  gap: 0.4rem;
}

html.stats-visible .page-views {
  display: inline-flex;
}

.page-views i {
  font-size: 0.7rem;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: var(--transition);
}

.footer-links a:hover { color: var(--accent); }

.social-links {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.social-link {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 50%;
  color: var(--text-secondary);
  text-decoration: none;
  transition: var(--transition);
}

.social-link:hover {
  border-color: var(--border-hover);
  color: var(--accent);
  transform: translateY(-2px);
}

/* ===== Scroll Reveal ===== */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

/* ===== Hero photo ===== */
.hero-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top;
  border-radius: 50%;
  display: block;
  user-select: none;
  -webkit-user-drag: none;
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.hero-photo:hover img {
  transform: scale(1.04);
}

.photo-watermark {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: rgba(255, 255, 255, 0.22);
  transform: rotate(-28deg);
  letter-spacing: 0.04em;
  z-index: 3;
  user-select: none;
}

/* ===== Light content protection (CSS) ===== */
img[data-protect],
.hero-photo img {
  -webkit-user-drag: none;
  -webkit-touch-callout: none;
  user-select: none;
}

@media print {
  body * { display: none !important; }
  body::before {
    content: 'Impressão não autorizada. Material protegido — © Prof. Me. Célio Ricardo Castelano · castelano.com.br';
    display: block !important;
    padding: 3rem 2rem;
    text-align: center;
    font: 14pt/1.6 Georgia, serif;
    color: #000;
  }
}

/* ===== Scrollbar ===== */
::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb {
  background: linear-gradient(var(--accent-dim), var(--accent-deep));
  border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover { background: var(--accent); }

/* ===== Responsive ===== */
@media (max-width: 968px) {
  .hero-grid {
    grid-template-columns: 1fr;
    grid-template-areas: "content" "photo";
    text-align: center;
    gap: 2.5rem;
  }

  .hero-content h1 {
    align-items: center;
  }

  .hero-photo { width: 240px; height: 240px; }
  .orbit-ring.ring-1 { width: 300px; height: 300px; }
  .orbit-ring.ring-2 { display: none; }
  .hero-description { margin-left: auto; margin-right: auto; }
  .tech-stack,
  .btn-group { justify-content: center; }
  .brand-signal { text-align: center; }
  .profile-grid { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .container { padding: 0 1.25rem; }

  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(12, 15, 20, 0.97);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    flex-direction: column;
    padding: 1.5rem 2rem;
    gap: 1.25rem;
    border-bottom: 1px solid var(--border);
    max-height: 0;
    overflow: hidden;
  }

  .nav-links.active {
    display: flex;
    max-height: 420px;
  }

  .menu-toggle { display: block; }

  .hero { padding: 5.25rem 0 2.5rem; }
  .section { padding: 3.5rem 0; }

  .hero-photo { width: 200px; height: 200px; }
  .orbit-ring.ring-1 { width: 250px; height: 250px; }

  .lesson-hero h1 { font-size: 1.85rem; }

  .tab-btn { padding: 0.65rem 0.9rem; font-size: 0.85rem; }
  .profile-item-v2 { grid-template-columns: 1fr; gap: 0.75rem; }
  .profile-icon-box { width: 40px; height: 40px; font-size: 1rem; }

  .market-card { padding: 1.5rem; }
  .market-grid { grid-template-columns: 1fr; }

  .discipline-card-foot {
    flex-direction: column;
    align-items: flex-start;
  }
}

@supports (padding-bottom: env(safe-area-inset-bottom)) {
  .footer { padding-bottom: calc(2rem + env(safe-area-inset-bottom)); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}

/* ===== Light theme (escuro continua padrão) ===== */
html[data-theme="light"] {
  color-scheme: light;
  --bg-primary: #f4f6fa;
  --bg-secondary: #eef1f6;
  --bg-tertiary: #e4e9f1;
  --bg-card: #ffffff;
  --bg-elevated: #ffffff;

  --accent: #2563eb;
  --accent-dim: #1d4ed8;
  --accent-deep: #1e3a8a;
  --accent-soft: rgba(37, 99, 235, 0.1);
  --accent-border: rgba(37, 99, 235, 0.28);
  --accent-glow: rgba(37, 99, 235, 0.18);

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-tertiary: #64748b;

  --border: rgba(15, 23, 42, 0.1);
  --border-hover: rgba(37, 99, 235, 0.4);

  --gradient-primary: linear-gradient(135deg, #38bdf8 0%, #2563eb 100%);
  --gradient-secondary: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
  --gradient-glow: radial-gradient(ellipse at 30% 0%, rgba(37, 99, 235, 0.1), transparent 55%);

  --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 8px 24px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 16px 48px rgba(15, 23, 42, 0.1);
}

html[data-theme="light"] body::before {
  background-image:
    linear-gradient(rgba(37, 99, 235, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(37, 99, 235, 0.045) 1px, transparent 1px);
  opacity: 0.7;
}

html[data-theme="light"] .navbar.scrolled {
  background: rgba(244, 246, 250, 0.9);
}

html[data-theme="light"] .btn-primary {
  color: #ffffff;
}

html[data-theme="light"] .lesson-item:hover .lesson-icon,
html[data-theme="light"] .profile-item-v2:hover .profile-icon-box {
  color: #ffffff;
}

html[data-theme="light"] .market-item,
html[data-theme="light"] .market-careers {
  background: rgba(255, 255, 255, 0.85);
}

html[data-theme="light"] .photo-watermark {
  color: rgba(15, 23, 42, 0.28);
}

@media (min-width: 641px) {
  .nav-links { margin-left: auto; }
}

@media (max-width: 640px) {
  .nav-actions { margin-left: auto; }

  html[data-theme="light"] .nav-links {
    background: rgba(244, 246, 250, 0.98);
  }
}