/* Design tokens — Product Builders Sessions
   Fonte: handoff "Product Builders Sessions - Key Visual" (Claude Design) */
:root {
  --color-carbon: #0B0B0C;
  --color-carbon-panel: #0F0F11;
  --color-graphite: #1A1A1D;
  --color-line: #232326;
  --color-line-2: #2E2E32;
  --color-orange: #FF6B1A;
  --color-orange-hover: #FF8B45;
  --color-gray: #8A8A90;
  --color-gray-dim: #6B6B72;
  --color-gray-dimmer: #55555C;
  --color-offwhite: #F5F4F2;
  --color-text-secondary: #A5A5AC;

  --font-logo: 'Poppins', sans-serif;
  --font-body: 'Archivo', -apple-system, 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --nav-height: 64px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--color-carbon);
  color: var(--color-offwhite);
  font-family: var(--font-body);
}

a { color: var(--color-orange); text-decoration: none; }
a:hover { color: var(--color-orange-hover); }

section[id] {
  scroll-margin-top: var(--nav-height);
}

/* ═══ NAV ═══ */

.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 0 clamp(24px, 5vw, 72px);
  background: var(--color-carbon);
  border-bottom: 1px solid var(--color-line);
}

.nav__logo {
  display: flex;
  align-items: baseline;
  gap: 6px;
  font-family: var(--font-logo);
  font-size: 16px;
  font-weight: 700;
  color: var(--color-offwhite);
  white-space: nowrap;
}

.nav__logo span {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.14em;
  color: var(--color-orange);
}

.nav__toggle {
  display: none;
  width: 32px;
  height: 32px;
  padding: 0;
  background: none;
  border: none;
  cursor: pointer;
  position: relative;
}

.nav__toggle span,
.nav__toggle span::before,
.nav__toggle span::after {
  content: '';
  position: absolute;
  left: 4px;
  right: 4px;
  height: 1px;
  background: var(--color-offwhite);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav__toggle span { top: 50%; }
.nav__toggle span::before { top: -8px; }
.nav__toggle span::after { top: 8px; }

.nav__links {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 32px;
  margin: 0;
  padding: 0;
}

.nav__links a {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--color-gray);
}

.nav__links a:hover {
  color: var(--color-offwhite);
}

.nav__links .nav__cta {
  padding: 9px 18px;
  background: var(--color-orange);
  color: var(--color-carbon);
  font-weight: 600;
}

.nav__links .nav__cta:hover {
  background: var(--color-orange-hover);
  color: var(--color-carbon);
}

@media (max-width: 860px) {
  .nav__toggle { display: block; }

  .nav__links {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    z-index: 20;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    background: var(--color-carbon);
    border-bottom: 1px solid var(--color-line);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.25s ease;
  }

  .nav__links.is-open {
    max-height: calc(100vh - var(--nav-height));
    overflow-y: auto;
  }

  .nav__links li {
    width: 100%;
  }

  .nav__links a {
    display: block;
    padding: 16px clamp(24px, 5vw, 72px);
    width: 100%;
    border-bottom: 1px solid var(--color-line);
  }

  .nav__links .nav__cta {
    margin: 16px clamp(24px, 5vw, 72px);
    width: calc(100% - 2 * clamp(24px, 5vw, 72px));
    text-align: center;
  }

  .nav.is-open .nav__toggle span {
    background: transparent;
  }

  .nav.is-open .nav__toggle span::before {
    top: 0;
    transform: rotate(45deg);
  }

  .nav.is-open .nav__toggle span::after {
    top: 0;
    transform: rotate(-45deg);
  }
}

/* ═══ HERO / KEY VISUAL ═══ */

.hero {
  min-height: calc(100vh - var(--nav-height));
  padding: clamp(20px, 2.5vw, 32px) clamp(24px, 5vw, 72px);
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--color-line);
}

.hero__bg-panel {
  position: absolute;
  top: 0;
  right: 0;
  width: 38%;
  height: 100%;
  background: var(--color-carbon-panel);
}

.hero__bg-divider {
  position: absolute;
  top: 0;
  right: 38%;
  width: 1px;
  height: 100%;
  background: var(--color-line);
}

.hero__bg-circle {
  position: absolute;
  top: 200px;
  right: -140px;
  width: 420px;
  height: 420px;
  border: 1px solid var(--color-line-2);
  border-radius: 50%;
}

.hero__bg-bar {
  position: absolute;
  top: 96px;
  right: clamp(24px, 5vw, 72px);
  width: 14px;
  height: 96px;
  background: var(--color-orange);
}

.hero__top {
  position: relative;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 24px;
}

.hero__logo {
  width: 100%;
  max-width: 200px;
}

.hero__meta {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 8px;
}

.hero__eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--color-gray);
}

.hero__eyebrow--dim {
  color: var(--color-gray-dimmer);
}

.hero__body {
  position: relative;
  max-width: min(1080px, 64%);
  margin-top: clamp(24px, 20vh - 90px, 150px);
  padding: 0 0 24px;
}

.hero__rule {
  width: 64px;
  height: 3px;
  background: var(--color-line);
  margin-bottom: 16px;
}

.hero__title {
  margin: 0;
  font-size: clamp(32px, 4.6vw, 68px);
  line-height: 1.04;
  font-weight: 700;
  letter-spacing: -0.03em;
  text-wrap: balance;
}

.hero__subtitle {
  margin: 16px 0 0;
  max-width: 640px;
  font-size: 18px;
  line-height: 1.45;
  font-weight: 400;
  color: var(--color-text-secondary);
}

.hero__cta {
  display: inline-block;
  margin-top: 24px;
  padding: 14px 28px;
  background: var(--color-orange);
  color: var(--color-carbon);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero__cta:hover {
  background: var(--color-orange-hover);
  color: var(--color-carbon);
}

.hero__footer {
  position: relative;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
  margin-top: auto;
  padding-top: 20px;
  border-top: 1px solid var(--color-line);
}

.hero__footer-info {
  display: flex;
  flex-wrap: wrap;
  gap: 20px 48px;
}

.hero__info-label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--color-gray-dim);
  margin-bottom: 8px;
}

.hero__info-value {
  font-size: 16px;
  font-weight: 600;
}

.hero__credit {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--color-gray-dimmer);
}

@media (max-width: 768px) {
  .hero__body {
    max-width: 100%;
  }
}

/* ═══ SEÇÕES GENÉRICAS ═══ */

.section {
  padding: clamp(56px, 7vw, 96px) clamp(24px, 5vw, 72px);
  border-bottom: 1px solid var(--color-line);
}

.section__eyebrow {
  margin: 0 0 32px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.2em;
  color: var(--color-gray);
}

.section__intro {
  max-width: 720px;
  font-size: 19px;
  line-height: 1.6;
  color: var(--color-text-secondary);
}

.section__intro p + p {
  margin-top: 20px;
}

.section__note {
  max-width: 640px;
  margin: -16px 0 32px;
  font-size: 14px;
  line-height: 1.5;
  color: var(--color-gray);
}

.section__note strong {
  color: var(--color-orange);
  font-weight: 600;
}

/* ═══ PROGRAMAÇÃO ═══ */

.schedule {
  list-style: none;
  margin: 0;
  padding: 0;
}

.schedule__item {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 24px;
  padding: 24px 0;
  border-top: 1px solid var(--color-line);
}

.schedule__item:last-child {
  border-bottom: 1px solid var(--color-line);
}

.schedule__time {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-gray);
  white-space: nowrap;
}

.schedule__tag {
  display: block;
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-orange);
  white-space: normal;
}

.schedule__title {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 600;
}

.schedule__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.5;
  color: var(--color-text-secondary);
}

.schedule__speakers {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--color-orange);
}

.schedule__error {
  color: var(--color-gray);
  font-size: 14px;
}

@media (max-width: 600px) {
  .schedule__item {
    grid-template-columns: 1fr;
    gap: 8px;
  }
}

/* ═══ PARTICIPANTES ═══ */

.speakers-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  border-top: 1px solid var(--color-line);
  border-left: 1px solid var(--color-line);
}

.speaker-card {
  background: var(--color-carbon-panel);
  border-right: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
  padding: clamp(20px, 3vw, 28px);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.speaker-card__photo {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  background: var(--color-graphite);
}

.speaker-card__name {
  margin: 0;
  font-size: 18px;
  font-weight: 600;
}

.speaker-card__role {
  margin: -8px 0 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--color-orange);
  text-transform: uppercase;
}

.speaker-card__bio {
  margin: 0;
  font-size: 14px;
  line-height: 1.5;
  color: var(--color-text-secondary);
  flex: 1;
}

.speaker-card__link {
  align-self: flex-start;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--color-gray);
}

.speaker-card__link:hover {
  color: var(--color-orange);
}

.speaker-card__error {
  padding: 24px;
  color: var(--color-gray);
}

/* ═══ LOCAL ═══ */

.venue {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}

.venue__name {
  margin: 0 0 12px;
  font-size: 28px;
  font-weight: 700;
}

.venue__address {
  margin: 0 0 24px;
  font-size: 16px;
  line-height: 1.5;
  color: var(--color-text-secondary);
}

.venue__map-link {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--color-orange);
}

.venue__map {
  width: 100%;
  aspect-ratio: 4 / 3;
  border: 1px solid var(--color-line);
  filter: grayscale(1) invert(0.92) contrast(0.9);
}

@media (max-width: 760px) {
  .venue {
    grid-template-columns: 1fr;
  }

  .venue__map {
    order: -1;
  }
}

/* ═══ CTA FINAL ═══ */

.cta-final {
  text-align: center;
}

.cta-final__title {
  margin: 0 0 12px;
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.cta-final__desc {
  margin: 0 0 28px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--color-gray);
}

/* ═══ FORMULÁRIO DE CONTATO ═══ */

.contact-form {
  max-width: 560px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

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

.contact-form__row label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--color-gray);
  text-transform: uppercase;
}

.contact-form__row input,
.contact-form__row textarea {
  background: var(--color-carbon-panel);
  border: 1px solid var(--color-line);
  color: var(--color-offwhite);
  font-family: var(--font-body);
  font-size: 15px;
  padding: 12px 14px;
  resize: vertical;
}

.contact-form__row input:focus,
.contact-form__row textarea:focus {
  outline: none;
  border-color: var(--color-orange);
}

.contact-form__error {
  min-height: 16px;
  font-size: 12px;
  color: #FF8B45;
}

.contact-form__status {
  margin: 4px 0 0;
  font-size: 14px;
  color: var(--color-text-secondary);
}

.contact-form button.hero__cta {
  align-self: flex-start;
  border: none;
  cursor: pointer;
}

.contact-form button.hero__cta:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.contact-form__checkbox-row {
  flex-direction: row;
  align-items: flex-start;
  gap: 10px;
}

.contact-form__checkbox-row input[type="checkbox"] {
  margin-top: 3px;
  width: 16px;
  height: 16px;
  accent-color: var(--color-orange);
  flex-shrink: 0;
}

.contact-form__checkbox-row label {
  font-family: var(--font-body);
  font-size: 14px;
  letter-spacing: normal;
  text-transform: none;
  color: var(--color-text-secondary);
}

.contact-form__hint {
  margin: -2px 0 0;
  font-size: 12px;
  color: var(--color-gray-dim);
}

.event-summary {
  display: flex;
  flex-wrap: wrap;
  gap: 20px 40px;
  margin-top: 8px;
}

.event-summary__item {
  font-size: 14px;
  color: var(--color-text-secondary);
}

.event-summary__item strong {
  color: var(--color-offwhite);
}

/* ═══ RODAPÉ ═══ */

.footer {
  padding: 32px clamp(24px, 5vw, 72px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer__brand {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--color-gray-dimmer);
}

.footer__links {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}

.footer__links a {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--color-gray);
}

.footer__links a:hover {
  color: var(--color-orange);
}