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

:root {
  --bg-primary: #0a0a0a;
  --bg-secondary: #111111;
  --bg-card: #1a1a1a;
  --bg-elevated: #222222;
  --accent: #c8a44e;
  --accent-dim: rgba(200, 164, 78, 0.12);
  --accent-hover: #dbb95a;
  --text-primary: #f5f5f5;
  --text-secondary: #a0a0a0;
  --text-muted: #666666;
  --cyan: #00bcd4;
  --cyan-dim: rgba(0, 188, 212, 0.1);
  --border: #2a2a2a;
  --radius: 12px;
  --radius-sm: 8px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --container: 1120px;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 18px 0;
  transition: background var(--transition), padding var(--transition);
}

.header--scrolled {
  background: rgba(10, 10, 10, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  padding: 12px 0;
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.5px;
}

.logo__img {
  height: 45px;
  width: 45px;
  flex-shrink: 0;
  aspect-ratio: 1 / 1;
  margin-right: 12px;
  border-radius: 50%;
  object-fit: cover;
  image-rendering: -webkit-optimize-contrast;
}

.logo span {
  color: var(--accent);
  font-weight: 300;
}

.nav__list {
  display: flex;
  list-style: none;
  gap: 32px;
}

.nav__link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  letter-spacing: 0.3px;
  position: relative;
  padding-bottom: 4px;
  transition: color var(--transition);
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1.5px;
  background: var(--accent);
  transition: width var(--transition);
}

.nav__link:hover,
.nav__link.active {
  color: var(--text-primary);
}

.nav__link:hover::after,
.nav__link.active::after {
  width: 100%;
}

.nav__close {
  display: none;
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition);
}

.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* hero */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background-color: #000000;
  background-image: url('assets/images/background-hero.jpeg');
  background-position: right center;
  background-repeat: no-repeat;
  background-size: 55%;
}

@media (max-width: 768px) {
  .hero {
    background-position: center;
    background-size: cover;
  }
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 20% 80%, rgba(200, 164, 78, 0.06), transparent),
    radial-gradient(ellipse 60% 50% at 80% 20%, rgba(200, 164, 78, 0.04), transparent);
  pointer-events: none;
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 0%, rgba(10, 10, 10, 0.4) 70%, var(--bg-primary) 100%);
  z-index: 1;
}

.hero__content {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 64px;
  align-items: center;
  padding: 120px 24px 80px;
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
}

.hero__tagline {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 3px;
  color: var(--accent);
  margin-bottom: 20px;
  font-weight: 500;
}

.hero__title {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -1.5px;
  margin-bottom: 20px;
}

.hero__subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 480px;
  line-height: 1.7;
  margin-bottom: 36px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-size: 0.9rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
}

.btn--primary {
  background: var(--accent);
  color: #0a0a0a;
}

.btn--primary:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(200, 164, 78, 0.2);
}

.btn--full {
  width: 100%;
}

.btn--outline {
  background: transparent;
  color: var(--accent);
  border: 1.5px solid var(--accent);
}

.btn--outline:hover {
  background: var(--accent-dim);
  transform: translateY(-1px);
}

.btn--outline svg {
  width: 18px;
  height: 18px;
}

/* audio card — wrapped with button in hero-cta-group */
.hero-cta-group {
  max-width: 320px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero-cta-group .btn--primary,
.hero-cta-group .mini-player {
  width: 100% !important;
  box-sizing: border-box !important;
  height: 48px;
}

.hero-cta-group .btn--primary {
  justify-content: center;
}

.hero-cta-group .mini-player {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 6px 32px;
  margin: 8px 0 0 0;
  background: rgba(26, 26, 26, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: 8px;
  border: 1px dashed rgba(255, 255, 255, 0.25);
  cursor: pointer;
  transition: background 0.2s;
}

.hero-cta-group .mini-player:hover {
  background: rgba(26, 26, 26, 0.95);
}

.glss-label {
  display: block;
  font-size: 0.55rem;
  color: var(--accent);
  text-align: center;
  margin-bottom: 2px;
  letter-spacing: 0.5px;
  font-weight: 500;
  line-height: 1.2;
}

.glss-controls {
  display: flex;
  align-items: center;
  gap: 4px;
  width: 100%;
}

.glss-controls .glss-btn {
  width: 14px;
  height: 14px;
  min-width: 14px;
  border-radius: 50%;
  border: 1.5px solid rgba(255, 255, 255, 0.6);
  background: transparent;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  outline: none;
  position: relative;
  flex-shrink: 0;
  transition: background 0.2s;
}

.glss-controls .glss-btn:hover {
  background: rgba(255, 255, 255, 0.1);
}

.glss-controls .glss-btn svg {
  width: 7px;
  height: 7px;
  display: block;
  position: absolute;
  top: 50%;
  left: 50%;
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.glss-controls .glss-btn .icon-play {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
}

.glss-controls .glss-btn .icon-pause {
  opacity: 0;
  transform: translate(-50%, -50%) scale(0.5);
}

.mini-player.playing .glss-btn .icon-play {
  opacity: 0;
  transform: translate(-50%, -50%) scale(0.5);
}

.mini-player.playing .glss-btn .icon-pause {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
}

.glss-controls .glss-btn svg polygon,
.glss-controls .glss-btn svg rect {
  fill: #fff;
}

.glss-controls .glss-progress {
  flex: 1;
  height: 3px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 2px;
  overflow: hidden;
  cursor: pointer;
}

.glss-controls .glss-progress-fill {
  height: 100%;
  width: 0%;
  background: var(--accent);
  border-radius: 2px;
}

.glss-controls .glss-time {
  color: #fff;
  font-size: 9px;
  font-family: var(--font);
  opacity: 0.7;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
  flex-shrink: 0;
}

.glss-controls .glss-speed {
  width: 20px;
  height: 20px;
  min-width: 20px;
  border-radius: 50%;
  border: none;
  background: transparent;
  color: #fff;
  font-size: 8px;
  font-family: var(--font);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  outline: none;
  opacity: 0.6;
  transition: opacity 0.2s;
  flex-shrink: 0;
}

.glss-controls .glss-speed:hover {
  opacity: 1;
}

/* glass audio card */
.glss-card {
  display: flex;
  background: rgba(26, 26, 26, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: 16px;
  padding: 16px;
  max-width: 250px;
  width: 100%;
  cursor: pointer;
  box-sizing: border-box;
}

.glss-border {
  border: 2px dashed rgba(255, 255, 255, 0.2);
  border-radius: 12px;
  padding: 16px 18px;
  width: 100%;
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.glss-top {
  color: #fff;
  font-size: 11px;
  text-align: center;
  font-family: var(--font);
  opacity: 0.85;
  margin: 0 0 12px 0;
  line-height: 1.5;
}

.glss-btn {
  width: 44px;
  height: 44px;
  min-width: 44px;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.6);
  background: transparent;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  outline: none;
  position: relative;
  transition: background 0.2s;
}

.glss-btn:hover {
  background: rgba(255, 255, 255, 0.1);
}

.glss-btn svg {
  width: 16px;
  height: 16px;
  display: block;
  position: absolute;
  top: 50%;
  left: 50%;
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.glss-btn .icon-play {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
}

.glss-btn .icon-pause {
  opacity: 0;
  transform: translate(-50%, -50%) scale(0.5);
}

.glss-card.playing .glss-btn .icon-play {
  opacity: 0;
  transform: translate(-50%, -50%) scale(0.5);
}

.glss-card.playing .glss-btn .icon-pause {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
}

.glss-btn svg polygon,
.glss-btn svg rect {
  fill: #fff;
}

.glss-row {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  margin-top: 10px;
}

.glss-waves {
  display: flex;
  align-items: flex-end;
  gap: 2px;
  height: 18px;
}

.glss-waves span {
  display: block;
  width: 3px;
  background: #fff;
  border-radius: 2px;
  opacity: 0.9;
  animation: pulsar 0.5s ease-in-out infinite alternate;
  animation-play-state: paused;
  transform-origin: bottom;
}

.glss-card.playing .glss-waves span {
  animation-play-state: running;
}

.glss-waves span:nth-child(1) { height: 6px; animation-delay: 0.00s; }
.glss-waves span:nth-child(2) { height: 12px; animation-delay: 0.15s; }
.glss-waves span:nth-child(3) { height: 18px; animation-delay: 0.30s; }
.glss-waves span:nth-child(4) { height: 10px; animation-delay: 0.10s; }
.glss-waves span:nth-child(5) { height: 14px; animation-delay: 0.20s; }

@keyframes pulsar {
  0% { transform: scaleY(0.3); }
  100% { transform: scaleY(1); }
}

.glss-progress {
  flex: 1;
  height: 3px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 2px;
  overflow: hidden;
}

.glss-progress-fill {
  height: 100%;
  width: 0%;
  background: #fff;
  border-radius: 2px;
}

.glss-time {
  color: #fff;
  font-size: 11px;
  font-family: var(--font);
  opacity: 0.7;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.glss-bottom {
  color: rgba(255, 255, 255, 0.35);
  font-size: 9px;
  margin-top: 10px;
  text-align: center;
  font-family: var(--font);
  letter-spacing: 0.5px;
  text-transform: lowercase;
}

.audio-player {
  width: 100%;
}

.audio-player__placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding: 32px 16px;
  border: 2px dashed var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-size: 0.8rem;
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition);
}

.audio-player__placeholder:hover {
  border-color: var(--accent);
  background: var(--accent-dim);
}

.audio-player__controls {
  display: flex;
  align-items: center;
  gap: 12px;
}

.audio-player__btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: none;
  background: var(--accent);
  color: #0a0a0a;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  flex-shrink: 0;
  transition: background var(--transition), transform var(--transition);
}

.audio-player__btn:hover {
  background: var(--accent-hover);
  transform: scale(1.05);
}

.audio-player__progress {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 10px;
}

.audio-player__track {
  flex: 1;
  height: 4px;
  background: var(--bg-elevated);
  border-radius: 4px;
  overflow: hidden;
  cursor: pointer;
}

.audio-player__fill {
  height: 100%;
  background: var(--accent);
  border-radius: 4px;
  width: 0%;
  transition: width 0.1s linear;
}

.audio-player__time {
  font-size: 0.75rem;
  color: var(--text-muted);
  min-width: 36px;
  text-align: right;
  font-variant-numeric: tabular-nums;
}

/* scroll indicator */
.hero__scroll {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
  font-size: 0.7rem;
  letter-spacing: 2px;
  text-transform: uppercase;
}

.hero__scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(180deg, var(--text-muted), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
  0%, 100% { opacity: 1; transform: scaleY(1); }
  50% { opacity: 0.4; transform: scaleY(0.6); }
}

/* sections */
.section {
  padding: 100px 0;
}

.section:nth-child(even) {
  background: var(--bg-secondary);
}

.section__header {
  text-align: center;
  max-width: 600px;
  margin: 0 auto 64px;
}

.section__tag {
  display: inline-block;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 3px;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 12px;
}

.section__title {
  font-size: clamp(1.8rem, 3vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.5px;
  margin-bottom: 16px;
}

.section__desc {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.7;
}

/* sobre */
.sobre__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.sobre__img-wrapper {
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 4 / 5;
  background: var(--bg-elevated);
}

.sobre__img-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.sobre__img-wrapper:hover img {
  transform: scale(1.03);
}

.sobre__text {
  color: var(--text-secondary);
  margin-bottom: 18px;
  font-size: 0.95rem;
  line-height: 1.8;
}

.sobre__text strong {
  color: var(--text-primary);
  font-weight: 600;
}

.sobre__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 36px;
}

.stat {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 20px 16px;
  text-align: center;
}

.stat__number {
  display: block;
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1.2;
  margin-bottom: 4px;
}

.stat__label {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* aulas */
.aulas__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 48px;
}

.aula-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 28px;
  position: relative;
  transition: border-color var(--transition), transform var(--transition);
}

.aula-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
}

.aula-card--highlight {
  border-color: var(--accent);
  background: linear-gradient(180deg, var(--accent-dim), var(--bg-card) 60%);
}

.aula-card__badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent);
  color: #0a0a0a;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  padding: 6px 18px;
  border-radius: 20px;
}

.aula-card__icon {
  color: var(--accent);
  margin-bottom: 20px;
}

.aula-card__title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.aula-card__desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 20px;
}

.aula-card__list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.aula-card__list li {
  font-size: 0.8rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.aula-card__list li::before {
  content: '';
  width: 5px;
  height: 5px;
  background: var(--accent);
  border-radius: 50%;
  flex-shrink: 0;
}

.aulas__info {
  display: flex;
  justify-content: center;
  gap: 40px;
  flex-wrap: wrap;
  padding: 36px 0 0;
  border-top: 1px solid var(--border);
}

.aulas__info-item {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-secondary);
  font-size: 0.85rem;
}

.aulas__info-item svg {
  color: var(--accent);
  flex-shrink: 0;
}

.aulas__link {
  color: inherit;
  text-decoration: none;
  cursor: pointer;
}

/* galeria - bento grid */
.bento-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.bento-item {
  position: relative;
  border-radius: 20px;
  overflow: hidden !important;
  aspect-ratio: 1;
  background: var(--bg-elevated);
  cursor: pointer;
  transition: transform 0.4s ease;
  isolation: isolate;
  -webkit-mask-image: -webkit-radial-gradient(white, black);
}

.bento-item:hover {
  transform: scale(1.05);
}

.bento-item video,
.bento-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.bento-item--hero {
  grid-column: span 2;
  grid-row: span 2;
}

.bento-item:last-child {
  grid-column: 1 / -1;
  aspect-ratio: 3 / 1;
}

.bento-label {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 20px 24px;
  background: rgba(10, 10, 10, 0.45);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: 0.3px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

/* contato */
.contato__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

.contato__actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.contato__form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form__group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form__label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: 0.3px;
}

.form__input {
  width: 100%;
  padding: 14px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font);
  font-size: 0.9rem;
  transition: border-color var(--transition);
  outline: none;
}

.form__input:focus {
  border-color: var(--accent);
}

.form__input::placeholder {
  color: var(--text-muted);
}

.form__textarea {
  resize: vertical;
  min-height: 120px;
}

.contato__info {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.contato__card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 20px 24px;
}

.contato__card h3 {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 6px;
}

.contato__card p {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

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

.contato__link:hover {
  color: var(--accent);
}

/* depoimentos */
.depoimentos {
  background: var(--bg-secondary);
}

.depoimentos__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.depoimento-card {
  background: rgba(255, 255, 255, 0.04);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius);
  padding: 36px 28px;
  text-align: center;
  transition: border-color var(--transition), transform var(--transition);
}

.depoimento-card:hover {
  border-color: var(--cyan);
  transform: translateY(-4px);
}

.depoimento__text {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 20px;
  font-style: italic;
}

.depoimento__author {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--cyan);
}

/* footer */
.footer {
  background: #000000;
  padding: 40px 0 32px;
}

.footer__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

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

.footer__social-link {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  transition: color var(--transition);
}

.footer__social-link:hover {
  color: var(--cyan);
}

.footer__social-link svg {
  flex-shrink: 0;
}

.footer__copy {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.footer__credit {
  font-size: 0.7rem;
  color: #555555;
}

/* privacy modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.modal-overlay.open {
  opacity: 1;
  pointer-events: all;
}

.modal {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px 32px 32px;
  max-width: 440px;
  width: 90%;
  position: relative;
}

.modal__close {
  position: absolute;
  top: 12px;
  right: 16px;
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.6rem;
  cursor: pointer;
  line-height: 1;
  transition: color var(--transition);
}

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

.modal__title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 12px;
}

.modal__text {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* floating buttons */
.whatsapp-wrapper {
  position: fixed;
  right: 20px;
  bottom: 20px;
  display: flex;
  align-items: center;
  z-index: 900;
}

.whatsapp-bubble {
  position: relative;
  z-index: 999;
  background: rgba(26, 26, 26, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 8px;
  padding: 8px 14px;
  color: #fff;
  font-size: 12px;
  font-family: var(--font);
  white-space: nowrap;
  margin-right: 12px;
  transform: translateX(50px);
  opacity: 0;
  animation: whatsappBubble 12s ease-in-out infinite;
  pointer-events: none;
}

.whatsapp-bubble::after {
  content: '';
  position: absolute;
  right: -6px;
  top: 50%;
  transform: translateY(-50%);
  border-top: 6px solid transparent;
  border-bottom: 6px solid transparent;
  border-left: 6px solid rgba(26, 26, 26, 0.9);
}

@keyframes whatsappBubble {
  0% { transform: translateX(50px); opacity: 0; }
  10% { transform: translateX(0); opacity: 1; }
  25% { transform: translateX(0); opacity: 1; }
  35% { transform: translateX(50px); opacity: 0; }
  100% { transform: translateX(50px); opacity: 0; }
}

.whatsapp-float {
  position: relative;
  z-index: 1000;
  width: 55px;
  height: 55px;
  border-radius: 50%;
  background: #25D366;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: 0 4px 16px rgba(37, 211, 102, 0.3);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.whatsapp-float:hover {
  transform: scale(1.08);
  box-shadow: 0 6px 24px rgba(37, 211, 102, 0.45);
}

.back-to-top {
  position: fixed;
  right: 25px;
  bottom: 85px;
  width: 45px;
  height: 45px;
  border-radius: 50%;
  background: var(--accent);
  color: #0a0a0a;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 900;
  opacity: 0;
  pointer-events: none;
  transform: translateY(12px);
  transition: opacity 0.3s ease, transform 0.3s ease, background var(--transition);
  box-shadow: 0 4px 16px rgba(200, 164, 78, 0.25);
}

.back-to-top.visible {
  opacity: 1;
  pointer-events: all;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
}

/* responsive */

@media (max-width: 1024px) {
  .hero__content {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .sobre__grid {
    gap: 40px;
  }

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

@media (max-width: 768px) {
  .header {
    padding: 14px 0;
  }

  .header--scrolled {
    padding: 10px 0;
  }

  .nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: var(--bg-secondary);
    border-left: 1px solid var(--border);
    padding: 80px 32px 32px;
    transition: right var(--transition);
    z-index: 999;
  }

  .nav.open {
    right: 0;
  }

  .nav__close {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 36px;
    height: 36px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color var(--transition), background var(--transition);
  }

  .nav__close:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.08);
  }

  .nav__list {
    flex-direction: column;
    gap: 24px;
  }

  .nav__link {
    font-size: 1rem;
  }

  .logo__img {
    height: 40px;
    width: 40px;
    margin-right: 8px;
  }

  .hamburger {
    display: flex;
  }

  .hero__content {
    padding: 100px 24px 60px;
  }

  .hero__title {
    font-size: clamp(2rem, 8vw, 3rem);
  }

  .section {
    padding: 72px 0;
  }

  .section__header {
    margin-bottom: 48px;
  }

  .sobre__grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .sobre__stats {
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
  }

  .stat {
    padding: 16px 12px;
  }

  .stat__number {
    font-size: 1.3rem;
  }

  .aulas__grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .aulas__info {
    flex-direction: column;
    gap: 16px;
    align-items: center;
  }

  .bento-grid {
    display: flex;
    flex-wrap: nowrap;
    gap: 16px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scroll-snap-type: x mandatory;
  }

  .bento-item {
    flex: 0 0 85vw;
    flex-shrink: 0 !important;
    width: 85vw;
    aspect-ratio: 16 / 9;
    overflow: hidden !important;
    isolation: isolate;
    transform: translateZ(0);
    will-change: transform;
    -webkit-mask-image: -webkit-radial-gradient(white, black);
    clip-path: inset(0 round 20px);
    perspective: 1000px;
    backface-visibility: hidden;
    transform-style: preserve-3d;
    outline: 1px solid transparent;
    outline-offset: -1px;
    scroll-snap-align: start;
  }

  .bento-item:first-child {
    overflow: hidden !important;
  }

  .bento-item:hover {
    transform: none !important;
  }

  .bento-item video,
  .bento-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
  }

  .bento-item--hero {
    background-color: #000;
  }

  .bento-item:nth-child(2) video {
    object-position: center 40%;
  }

  .bento-item:nth-child(3) video {
    object-position: center 40%;
  }

  .bento-item:last-child {
    aspect-ratio: 16 / 9;
  }

  .gallery-dots {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 20px;
  }

  .gallery-dots .dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.25);
    transition: background 0.3s, transform 0.3s;
    cursor: default;
  }

  .gallery-dots .dot.active {
    background: #fff;
    transform: scale(1.3);
  }

  .depoimentos__grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .contato__grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .hero__scroll {
    display: none;
  }
}

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

  .hero__title {
    font-size: clamp(1.6rem, 10vw, 2.2rem);
  }
}