/* ============================================================
   TIAGO PEREIRA — style.css
   ============================================================ */

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

:root {
  --emerald-300: #6ee7b7;
  --emerald-400: #34d399;
  --emerald-500: #10b981;
  --emerald-600: #059669;
  --slate-50:  #f8fafc;
  --slate-100: #f1f5f9;
  --slate-200: #e2e8f0;
  --slate-300: #cbd5e1;
  --slate-400: #94a3b8;
  --slate-500: #64748b;
  --slate-600: #475569;
  --slate-700: #334155;
  --slate-800: #1e293b;
  --slate-900: #0f172a;
  --slate-950: #020617;
  --font: 'Inter', system-ui, -apple-system, sans-serif;
  --radius-sm: .5rem;
  --radius-md: 1rem;
  --radius-lg: 1.5rem;
  --radius-xl: 2rem;
  --transition: .25s ease;
  --shadow-glow: 0 0 40px rgba(52,211,153,.15);
}

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

body {
  font-family: var(--font);
  background: linear-gradient(160deg, #0d1a2d 0%, var(--slate-950) 60%);
  color: var(--slate-100);
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.6;
}

img { max-width: 100%; display: block; }
a  { text-decoration: none; color: inherit; }
ul { list-style: none; }

/* ---------- Watermark ---------- */
.watermark {
  position: fixed;
  inset: 0;
  background-image: url("../professor.png");
  background-repeat: no-repeat;
  background-position: right center;
  background-size: 65%;
  opacity: .07;
  pointer-events: none;
  z-index: 0;
  will-change: opacity;
}

/* ---------- Particles ---------- */
.particles {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.particle {
  position: absolute;
  border-radius: 50%;
  background: var(--emerald-400);
  opacity: 0;
  animation: float-particle linear infinite;
}

@keyframes float-particle {
  0%   { transform: translateY(100vh) scale(0); opacity: 0; }
  10%  { opacity: .4; }
  90%  { opacity: .1; }
  100% { transform: translateY(-10vh) scale(1); opacity: 0; }
}

/* ---------- Container ---------- */
.container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
  position: relative;
  z-index: 1;
}

/* ---------- Sections ---------- */
.section {
  padding: 5rem 0;
  position: relative;
  z-index: 1;
}

.section-alt {
  background: rgba(15,23,42,.5);
  backdrop-filter: blur(4px);
  border-top: 1px solid rgba(255,255,255,.04);
  border-bottom: 1px solid rgba(255,255,255,.04);
}

.section-header {
  text-align: center;
  margin-bottom: 3.5rem;
}

.section-tag {
  display: inline-block;
  font-size: .75rem;
  font-weight: 600;
  letter-spacing: .15em;
  text-transform: uppercase;
  color: var(--emerald-400);
  background: rgba(52,211,153,.08);
  border: 1px solid rgba(52,211,153,.2);
  padding: .3rem .9rem;
  border-radius: 9999px;
  margin-bottom: 1rem;
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 800;
  line-height: 1.2;
  color: var(--slate-50);
  margin-bottom: .75rem;
}

.section-subtitle {
  font-size: 1rem;
  color: var(--slate-400);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ---------- Buttons ---------- */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  background: var(--emerald-500);
  color: #fff;
  font-weight: 700;
  font-size: .9rem;
  padding: .85rem 1.75rem;
  border-radius: var(--radius-md);
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  border: none;
  cursor: pointer;
  white-space: nowrap;
}
.btn-primary:hover {
  background: var(--emerald-400);
  color: var(--slate-900);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(52,211,153,.3);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  background: transparent;
  color: var(--slate-200);
  font-weight: 600;
  font-size: .9rem;
  padding: .85rem 1.75rem;
  border-radius: var(--radius-md);
  border: 1px solid rgba(255,255,255,.12);
  transition: border-color var(--transition), color var(--transition), transform var(--transition);
  cursor: pointer;
  white-space: nowrap;
}
.btn-secondary:hover {
  border-color: var(--emerald-400);
  color: var(--emerald-300);
  transform: translateY(-2px);
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  background: transparent;
  color: var(--emerald-300);
  font-weight: 700;
  font-size: .9rem;
  padding: .85rem 1.75rem;
  border-radius: var(--radius-md);
  border: 1px solid rgba(52,211,153,.4);
  transition: all var(--transition);
  cursor: pointer;
  white-space: nowrap;
}
.btn-outline:hover {
  background: rgba(52,211,153,.08);
  border-color: var(--emerald-400);
  transform: translateY(-2px);
}

.btn-icon {
  width: 1.1rem;
  height: 1.1rem;
  fill: currentColor;
  flex-shrink: 0;
}

/* ---------- Navbar ---------- */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  transition: background var(--transition), box-shadow var(--transition), backdrop-filter var(--transition);
}

.navbar.scrolled {
  background: rgba(9,14,26,.92);
  backdrop-filter: blur(16px);
  box-shadow: 0 1px 0 rgba(255,255,255,.06);
}

.navbar-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 68px;
  display: flex;
  align-items: center;
  gap: 2rem;
}

.navbar-logo { flex-shrink: 0; }

.navbar-links {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  margin-left: auto;
}

.nav-link {
  font-size: .875rem;
  font-weight: 500;
  color: var(--slate-300);
  transition: color var(--transition);
  position: relative;
  padding-bottom: 2px;
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px; left: 0;
  width: 0; height: 2px;
  background: var(--emerald-400);
  border-radius: 1px;
  transition: width var(--transition);
}
.nav-link:hover { color: var(--emerald-300); }
.nav-link:hover::after { width: 100%; }

.btn-nav-cta {
  display: inline-flex;
  align-items: center;
  background: var(--emerald-500);
  color: #fff;
  font-size: .8rem;
  font-weight: 700;
  padding: .55rem 1.2rem;
  border-radius: .75rem;
  transition: background var(--transition), transform var(--transition);
  white-space: nowrap;
}
.btn-nav-cta:hover {
  background: var(--emerald-400);
  color: var(--slate-900);
  transform: translateY(-1px);
}

/* Hamburger */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: .4rem;
  margin-left: 1rem;
}
.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--slate-200);
  border-radius: 2px;
  transition: all .3s ease;
}
.menu-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle.open span:nth-child(2) { opacity: 0; }
.menu-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile Menu */
.mobile-menu {
  display: none;
  position: absolute;
  top: 68px; left: 0; right: 0;
  background: rgba(9,14,26,.97);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255,255,255,.06);
  padding: 1.5rem;
  transform: translateY(-8px);
  opacity: 0;
  transition: opacity .25s ease, transform .25s ease;
  pointer-events: none;
}
.mobile-menu.open {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
.mobile-menu ul { display: flex; flex-direction: column; gap: .5rem; }
.mobile-nav-link {
  display: block;
  padding: .75rem 1rem;
  font-size: .95rem;
  font-weight: 500;
  color: var(--slate-300);
  border-radius: var(--radius-sm);
  transition: background var(--transition), color var(--transition);
}
.mobile-nav-link:hover { background: rgba(255,255,255,.05); color: var(--emerald-300); }
.mobile-nav-cta {
  display: block;
  margin-top: .5rem;
  padding: .85rem 1rem;
  text-align: center;
  font-weight: 700;
  font-size: .95rem;
  background: var(--emerald-500);
  color: #fff;
  border-radius: var(--radius-md);
  transition: background var(--transition);
}
.mobile-nav-cta:hover { background: var(--emerald-400); color: var(--slate-900); }

/* ---------- Hero ---------- */
.hero-section {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 8rem 1.5rem 4rem;
  position: relative;
  z-index: 1;
  text-align: center;
}

.hero-content {
  max-width: 780px;
  width: 100%;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  font-size: .78rem;
  font-weight: 600;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--emerald-300);
  background: rgba(52,211,153,.08);
  border: 1px solid rgba(52,211,153,.2);
  padding: .4rem 1rem;
  border-radius: 9999px;
  margin-bottom: 1.5rem;
}

.badge-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--emerald-400);
  animation: pulse-dot 2s ease infinite;
}
@keyframes pulse-dot {
  0%,100% { box-shadow: 0 0 0 0 rgba(52,211,153,.5); }
  50%      { box-shadow: 0 0 0 6px rgba(52,211,153,0); }
}

.hero-title {
  font-size: clamp(2.5rem, 7vw, 4.5rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -.02em;
  color: var(--slate-50);
  margin-bottom: 1.25rem;
}

.gradient-text {
  background: linear-gradient(135deg, var(--emerald-300) 0%, #38bdf8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: clamp(.95rem, 2vw, 1.15rem);
  color: var(--slate-400);
  max-width: 600px;
  margin: 0 auto 2.5rem;
  line-height: 1.75;
}
.hero-subtitle strong { color: var(--slate-200); }

.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: .85rem;
  justify-content: center;
  margin-bottom: 3.5rem;
}

.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  flex-wrap: wrap;
  border: 1px solid rgba(255,255,255,.07);
  background: rgba(255,255,255,.03);
  border-radius: var(--radius-lg);
  padding: 1.25rem 2rem;
  backdrop-filter: blur(8px);
  max-width: 480px;
  margin: 0 auto;
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0 1.75rem;
}

.stat-number {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--emerald-300);
  line-height: 1;
  margin-bottom: .2rem;
}

.stat-label {
  font-size: .72rem;
  color: var(--slate-500);
  text-transform: uppercase;
  letter-spacing: .08em;
  font-weight: 500;
}

.stat-divider {
  width: 1px;
  height: 36px;
  background: rgba(255,255,255,.08);
  flex-shrink: 0;
}

.hero-scroll {
  position: absolute;
  bottom: 2.5rem;
  left: 50%;
  transform: translateX(-50%);
}
.scroll-indicator {
  width: 24px;
  height: 40px;
  border: 2px solid rgba(255,255,255,.15);
  border-radius: 12px;
  position: relative;
}
.scroll-indicator::after {
  content: '';
  position: absolute;
  top: 5px; left: 50%;
  transform: translateX(-50%);
  width: 4px; height: 8px;
  background: var(--emerald-400);
  border-radius: 2px;
  animation: scroll-bob 1.6s ease infinite;
}
@keyframes scroll-bob {
  0%,100% { top: 5px; opacity: 1; }
  80%      { top: 18px; opacity: 0; }
}

/* ---------- Services ---------- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1.5rem;
}

.service-card {
  background: rgba(15,23,42,.7);
  border: 1px solid rgba(255,255,255,.07);
  border-radius: var(--radius-lg);
  padding: 2rem 1.5rem;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  position: relative;
  overflow: hidden;
}
.service-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(52,211,153,.04) 0%, transparent 60%);
  opacity: 0;
  transition: opacity var(--transition);
  pointer-events: none;
}
.service-card:hover {
  border-color: rgba(52,211,153,.3);
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0,0,0,.3), var(--shadow-glow);
}
.service-card:hover::before { opacity: 1; }

.service-icon-wrap {
  width: 48px; height: 48px;
  border-radius: var(--radius-md);
  background: rgba(52,211,153,.1);
  border: 1px solid rgba(52,211,153,.2);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
}
.service-icon {
  width: 24px; height: 24px;
  fill: var(--emerald-400);
}
.service-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--slate-100);
  margin-bottom: .6rem;
}
.service-desc {
  font-size: .875rem;
  color: var(--slate-400);
  line-height: 1.65;
  margin-bottom: 1.25rem;
}
.service-link {
  font-size: .8rem;
  font-weight: 600;
  color: var(--emerald-400);
  transition: color var(--transition), gap var(--transition);
  display: inline-flex;
  align-items: center;
  gap: .3rem;
}
.service-link:hover { color: var(--emerald-300); gap: .5rem; }

/* ---------- Courses ---------- */
.courses-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  align-items: start;
}

.course-card {
  background: rgba(15,23,42,.8);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: var(--radius-xl);
  padding: 2rem;
  position: relative;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}
.course-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(0,0,0,.35);
}
.course-card.featured {
  border-color: rgba(52,211,153,.3);
  background: rgba(52,211,153,.04);
}
.course-card.featured:hover {
  border-color: var(--emerald-400);
  box-shadow: 0 16px 40px rgba(0,0,0,.35), var(--shadow-glow);
}

.course-badge-wrap {
  margin-bottom: .75rem;
}
.course-badge {
  display: inline-block;
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  background: linear-gradient(135deg, var(--emerald-500), #38bdf8);
  color: #fff;
  padding: .25rem .8rem;
  border-radius: 9999px;
}

.course-platform {
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--slate-500);
  margin-bottom: .5rem;
}

.course-title {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--slate-50);
  margin-bottom: .75rem;
}

.course-desc {
  font-size: .875rem;
  color: var(--slate-400);
  line-height: 1.7;
  margin-bottom: 1.25rem;
}

.course-topics {
  display: flex;
  flex-direction: column;
  gap: .45rem;
  margin-bottom: 1.75rem;
}
.course-topics li {
  font-size: .825rem;
  color: var(--slate-300);
}

.btn-course-primary {
  display: block;
  text-align: center;
  font-weight: 700;
  font-size: .9rem;
  padding: .9rem;
  border-radius: var(--radius-md);
  background: var(--emerald-500);
  color: #fff;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
}
.btn-course-primary:hover {
  background: var(--emerald-400);
  color: var(--slate-900);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(52,211,153,.3);
}

.btn-course-secondary {
  display: block;
  text-align: center;
  font-weight: 700;
  font-size: .9rem;
  padding: .9rem;
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--emerald-300);
  border: 1px solid rgba(52,211,153,.3);
  transition: all var(--transition);
}
.btn-course-secondary:hover {
  background: rgba(52,211,153,.08);
  border-color: var(--emerald-400);
  transform: translateY(-2px);
}

/* ---------- Obras ---------- */
.obra-card-wrap {
  max-width: 900px;
  margin: 0 auto;
}

.obra-card {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 3rem;
  background: rgba(15,23,42,.8);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: var(--radius-xl);
  padding: 2.5rem;
  transition: border-color var(--transition), box-shadow var(--transition);
  align-items: start;
}
.obra-card:hover {
  border-color: rgba(52,211,153,.25);
  box-shadow: 0 16px 48px rgba(0,0,0,.4), var(--shadow-glow);
}

.obra-cover-col {
  flex-shrink: 0;
}

.obra-cover-wrap {
  position: relative;
  width: 200px;
}

.obra-cover-img {
  width: 200px;
  border-radius: var(--radius-md);
  box-shadow: 0 20px 50px rgba(0,0,0,.6);
  transition: transform var(--transition);
}
.obra-card:hover .obra-cover-img {
  transform: translateY(-4px) rotate(-1deg);
}

.obra-cover-glow {
  position: absolute;
  bottom: -20px;
  left: 50%;
  transform: translateX(-50%);
  width: 120px;
  height: 30px;
  background: rgba(52,211,153,.25);
  filter: blur(16px);
  border-radius: 50%;
  pointer-events: none;
}

.obra-info-col {
  display: flex;
  flex-direction: column;
  gap: .85rem;
}

.obra-tag {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--emerald-400);
  background: rgba(52,211,153,.08);
  border: 1px solid rgba(52,211,153,.18);
  padding: .3rem .85rem;
  border-radius: 9999px;
  width: fit-content;
}

.obra-title {
  font-size: clamp(1.2rem, 3vw, 1.6rem);
  font-weight: 800;
  color: var(--slate-50);
  line-height: 1.25;
}

.obra-author {
  font-size: .875rem;
  color: var(--slate-400);
}
.obra-author strong { color: var(--slate-200); }

.obra-quote {
  border-left: 3px solid var(--emerald-500);
  padding-left: 1rem;
  font-size: .9rem;
  font-style: italic;
  color: var(--slate-300);
  line-height: 1.7;
  background: rgba(52,211,153,.04);
  padding: .75rem 1rem;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.obra-desc {
  font-size: .875rem;
  color: var(--slate-400);
  line-height: 1.75;
}
.obra-desc strong { color: var(--slate-200); }

.obra-temas {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
}
.obra-tema {
  font-size: .72rem;
  font-weight: 600;
  color: var(--slate-300);
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.08);
  padding: .25rem .7rem;
  border-radius: 9999px;
}

.btn-obra {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  background: var(--emerald-500);
  color: #fff;
  font-weight: 700;
  font-size: .9rem;
  padding: .9rem 1.75rem;
  border-radius: var(--radius-md);
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  width: fit-content;
  margin-top: .5rem;
}
.btn-obra:hover {
  background: var(--emerald-400);
  color: var(--slate-900);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(52,211,153,.3);
}

/* ---------- CTA Band ---------- */
.cta-band {
  background: linear-gradient(135deg, rgba(16,185,129,.15) 0%, rgba(56,189,248,.08) 100%);
  border-top: 1px solid rgba(52,211,153,.15);
  border-bottom: 1px solid rgba(52,211,153,.15);
  padding: 4rem 1.5rem;
  position: relative;
  z-index: 1;
  overflow: hidden;
}
.cta-band::before {
  content: '';
  position: absolute;
  top: -80px; right: -80px;
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(52,211,153,.08) 0%, transparent 65%);
  pointer-events: none;
}

.cta-band-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2.5rem;
  flex-wrap: wrap;
}

.cta-band-title {
  font-size: clamp(1.3rem, 3vw, 1.75rem);
  font-weight: 800;
  color: var(--slate-50);
  margin-bottom: .4rem;
}
.cta-band-subtitle {
  font-size: .9rem;
  color: var(--slate-400);
}

.cta-band-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  flex-shrink: 0;
}

/* ---------- Contact ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.25rem;
  max-width: 900px;
  margin: 0 auto;
}

.contact-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: .6rem;
  padding: 1.75rem 1.25rem;
  background: rgba(15,23,42,.7);
  border: 1px solid rgba(255,255,255,.07);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}
.contact-card:hover {
  border-color: rgba(52,211,153,.3);
  transform: translateY(-3px);
  box-shadow: 0 10px 28px rgba(0,0,0,.3);
}

.contact-icon-wrap {
  width: 48px; height: 48px;
  border-radius: 50%;
  background: rgba(52,211,153,.1);
  border: 1px solid rgba(52,211,153,.2);
  display: flex;
  align-items: center;
  justify-content: center;
}
.contact-icon {
  width: 22px; height: 22px;
  fill: var(--emerald-400);
}
.contact-label {
  font-size: .72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .12em;
  color: var(--slate-500);
}
.contact-value {
  font-size: .825rem;
  font-weight: 600;
  color: var(--emerald-300);
  word-break: break-word;
}

/* ---------- Footer ---------- */
.site-footer {
  background: rgba(6,10,18,.7);
  border-top: 1px solid rgba(255,255,255,.05);
  padding: 3.5rem 1.5rem 2rem;
  position: relative;
  z-index: 1;
}

.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
  align-items: start;
}

.footer-logo {
  height: 36px;
  object-fit: contain;
  margin-bottom: .85rem;
}

.footer-tagline {
  font-size: .78rem;
  font-weight: 600;
  letter-spacing: .15em;
  text-transform: uppercase;
  color: var(--emerald-400);
  margin-bottom: .5rem;
}
.footer-region {
  font-size: .8rem;
  color: var(--slate-500);
  line-height: 1.5;
}

.footer-nav-title {
  font-size: .72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .12em;
  color: var(--slate-500);
  margin-bottom: .85rem;
}

.footer-nav ul { display: flex; flex-direction: column; gap: .55rem; }
.footer-link {
  font-size: .85rem;
  color: var(--slate-400);
  transition: color var(--transition);
}
.footer-link:hover { color: var(--emerald-300); }

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: .75rem;
  padding-top: 1.75rem;
  border-top: 1px solid rgba(255,255,255,.05);
}
.footer-copy { font-size: .78rem; color: var(--slate-600); }
.footer-credit { font-size: .78rem; color: var(--slate-600); }
.footer-credit-link {
  color: var(--emerald-400);
  font-weight: 600;
  transition: color var(--transition);
}
.footer-credit-link:hover { color: var(--emerald-300); }

/* ---------- WhatsApp Float ---------- */
.whatsapp-float {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 200;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: #22c55e;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 20px rgba(34,197,94,.4);
  transition: transform var(--transition), box-shadow var(--transition);
}
.whatsapp-float svg {
  width: 28px; height: 28px;
  fill: #fff;
}
.whatsapp-float:hover {
  transform: scale(1.1) translateY(-2px);
  box-shadow: 0 8px 28px rgba(34,197,94,.5);
}

.whatsapp-tooltip {
  position: absolute;
  right: calc(100% + .75rem);
  top: 50%;
  transform: translateY(-50%);
  background: rgba(9,14,26,.95);
  border: 1px solid rgba(255,255,255,.08);
  color: var(--slate-100);
  font-size: .78rem;
  font-weight: 600;
  padding: .35rem .75rem;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition);
}
.whatsapp-float:hover .whatsapp-tooltip { opacity: 1; }

/* ---------- Animations on Scroll ---------- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .55s ease, transform .55s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
  .navbar-links,
  .btn-nav-cta { display: none; }
  .menu-toggle { display: flex; }
  .mobile-menu { display: block; }

  .hero-section { padding: 7rem 1.25rem 3.5rem; }
  .hero-stats { padding: 1rem 1.25rem; }
  .stat-item { padding: 0 1rem; }

  .section { padding: 3.5rem 0; }

  .obra-card {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 1.75rem;
  }
  .obra-cover-col { display: flex; justify-content: center; }
  .obra-cover-wrap { width: 160px; }
  .obra-cover-img { width: 160px; }
  .obra-tag,
  .btn-obra { margin: 0 auto; }
  .obra-temas { justify-content: center; }
  .obra-quote { text-align: left; }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .cta-band-inner {
    flex-direction: column;
    text-align: center;
  }
  .cta-band-actions { justify-content: center; }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .hero-stats {
    flex-direction: column;
    gap: 1rem;
  }
  .stat-divider { width: 80%; height: 1px; }
  .courses-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr 1fr; }
}