@import url('https://fonts.googleapis.com/css2?family=Source+Sans+3:ital,wght@0,300;0,400;0,500;0,600;0,700;0,800;1,400&family=IBM+Plex+Mono:wght@400;500;600&display=swap');

:root {
  color-scheme: dark;
  --bg: #0C1017;
  --surface: #141A24;
  --surface-hover: #19212E;
  --surface-elevated: #1F2838;
  --text: #F0F4F8;
  --muted: #95A3B3;
  --line: #242E3E;
  --line-light: #344258;

  /* Python visual identity palette */
  --py-yellow: #F7CE3E;
  --py-yellow-hover: #FFE066;
  --py-yellow-dark: #D4A710;
  --py-blue: #4B8BBE;
  --py-blue-dark: #306998;
  --py-cyan: #5BC0EB;
  --py-navy: #1E2235;

  --accent: var(--py-yellow);
  --accent-alt: var(--py-cyan);
  --sans: 'Source Sans 3', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --mono: 'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 40px;
}

body {
  margin: 0;
  background-color: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease, border-color 0.2s ease;
}

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

a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 6px;
}

::selection {
  background: var(--py-yellow);
  color: #0C1017;
}

.skip-link {
  position: absolute;
  top: -120px;
  left: 20px;
  background: var(--py-yellow);
  color: #0C1017;
  font-weight: 700;
  padding: 10px 18px;
  border-radius: 4px;
  z-index: 100;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 16px;
}

.container {
  width: min(100% - 64px, 1100px);
  margin-inline: auto;
}

/* ==================== HEADER ==================== */
.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-block: 24px;
  border-bottom: 1px solid var(--line);
}

.brand-wrapper {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand-logo-img {
  height: 48px;
  width: auto;
  object-fit: contain;
  transition: transform 0.25s ease;
}

.brand-wrapper:hover .brand-logo-img {
  transform: scale(1.04);
}

.brand-title {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -0.5px;
  line-height: 1.1;
  color: var(--text);
}

.brand-title .accent-py {
  color: var(--py-yellow);
}

.brand-title .accent-sub {
  color: var(--py-cyan);
  font-size: 15px;
  display: block;
  font-weight: 600;
  letter-spacing: 0px;
}

nav {
  display: flex;
  align-items: center;
  gap: 28px;
  font-size: 15px;
  font-weight: 600;
}

nav a {
  position: relative;
  transition: color 0.2s;
}

nav a.nav-social {
  color: var(--muted);
  font-weight: 500;
}

nav a.nav-social:hover {
  color: var(--accent-alt);
}

/* ==================== HERO ==================== */
.hero {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 60px;
  align-items: center;
  padding: 80px 0 90px;
}

.eyebrow {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 1.6px;
  color: var(--py-cyan);
  margin: 0 0 20px;
  text-transform: uppercase;
}

h1 {
  font-weight: 800;
  font-size: clamp(38px, 4.6vw, 60px);
  line-height: 1.12;
  letter-spacing: -2px;
  margin: 0 0 24px;
}

h1 em {
  font-style: normal;
  color: var(--py-yellow);
  background: linear-gradient(90deg, var(--py-yellow), #FFF3A1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-description {
  max-width: 540px;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.75;
  margin: 0 0 32px;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background-color: var(--py-yellow);
  color: #0C1017;
  font-weight: 700;
  font-size: 15px;
  padding: 12px 24px;
  border-radius: 6px;
  transition: transform 0.2s ease, background-color 0.2s ease, box-shadow 0.2s ease;
  box-shadow: 0 4px 14px rgba(247, 206, 62, 0.2);
}

.btn-primary:hover {
  background-color: var(--py-yellow-hover);
  color: #0C1017;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(247, 206, 62, 0.35);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text);
  font-weight: 600;
  font-size: 15px;
  padding: 12px 20px;
  border: 1px solid var(--line-light);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.02);
  transition: background 0.2s, border-color 0.2s, color 0.2s;
}

.btn-secondary:hover {
  color: var(--py-cyan);
  border-color: var(--py-cyan);
  background: rgba(91, 192, 235, 0.06);
}

/* Terminal Mockup */
.terminal-card {
  background: #0E141E;
  border: 1px solid var(--line-light);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.45);
  transition: border-color 0.3s;
}

.terminal-card:hover {
  border-color: rgba(75, 139, 190, 0.6);
}

.terminal-header {
  background: #141D2B;
  padding: 12px 18px;
  display: flex;
  align-items: center;
  gap: 8px;
  border-bottom: 1px solid var(--line);
}

.dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  display: inline-block;
}

.dot-red { background: #FF5F56; }
.dot-yellow { background: #FFBD2E; }
.dot-green { background: #27C93F; }

.terminal-title {
  margin-left: auto;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0.5px;
}

.terminal-body {
  padding: 24px;
  font-family: var(--mono);
  font-size: 13.5px;
  line-height: 1.8;
  color: #DDE5ED;
}

.kw { color: #FF7B72; font-weight: 600; }
.func { color: #79C0FF; }
.str { color: #A5D6FF; }
.comment { color: #7D8B99; font-style: italic; }
.out { color: var(--py-yellow); font-weight: 500; }
.prompt { color: var(--py-cyan); user-select: none; }

/* ==================== SECTIONS COMMON ==================== */
.section {
  padding: 80px 0;
  border-top: 1px solid var(--line);
}

.section-heading {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 32px;
  margin-bottom: 48px;
}

.section-heading .eyebrow {
  margin-bottom: 12px;
}

h2 {
  font-size: clamp(28px, 3.2vw, 40px);
  line-height: 1.18;
  letter-spacing: -1px;
  font-weight: 700;
  margin: 0;
}

.section-heading > p {
  color: var(--muted);
  font-size: 16px;
  line-height: 1.7;
  max-width: 440px;
  margin: 0;
}

/* ==================== CONTEÚDOS GRATUITOS ==================== */
.content-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.content-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 28px;
  display: flex;
  flex-direction: column;
  transition: transform 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
  position: relative;
}

.content-card:hover {
  transform: translateY(-3px);
  border-color: var(--py-cyan);
  background-color: var(--surface-hover);
}

.card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.badge-tag {
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  padding: 4px 10px;
  border-radius: 4px;
  background: rgba(91, 192, 235, 0.12);
  color: var(--py-cyan);
  font-weight: 600;
}

.badge-level {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
}

.content-card h3 {
  font-size: 21px;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.4px;
  margin: 0 0 12px;
  color: var(--text);
}

.content-card p {
  color: var(--muted);
  font-size: 15px;
  line-height: 1.7;
  margin: 0 0 24px;
  flex-grow: 1;
}

.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 16px;
  font-size: 13.5px;
}

.read-time {
  font-family: var(--mono);
  color: #7A8999;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--py-yellow);
  font-weight: 600;
}

.card-link span {
  transition: transform 0.2s ease;
}

.content-card:hover .card-link span {
  transform: translateX(3px);
}

/* ==================== TREINAMENTOS PAGOS ==================== */
.courses-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 28px;
}

.course-card {
  background: #111722;
  border: 1px solid var(--line-light);
  border-radius: 10px;
  padding: 34px 30px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: transform 0.2s, border-color 0.2s;
}

.course-card.featured {
  border-color: rgba(247, 206, 62, 0.5);
  background: linear-gradient(180deg, #161F2E 0%, #111722 100%);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
}

.course-card:hover {
  transform: translateY(-4px);
  border-color: var(--py-yellow);
}

.course-badge {
  align-self: flex-start;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 20px;
}

.course-badge.open {
  background: rgba(39, 201, 63, 0.15);
  color: #55E86F;
  border: 1px solid rgba(39, 201, 63, 0.3);
}

.course-badge.coming-soon {
  background: rgba(247, 206, 62, 0.12);
  color: var(--py-yellow);
  border: 1px solid rgba(247, 206, 62, 0.25);
}

.course-card h3 {
  font-size: 24px;
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.5px;
  margin: 0 0 8px;
}

.course-headline {
  color: var(--py-cyan);
  font-size: 14px;
  font-weight: 600;
  margin: 0 0 16px;
}

.course-desc {
  color: var(--muted);
  font-size: 15px;
  line-height: 1.7;
  margin: 0 0 24px;
}

.course-features {
  list-style: none;
  padding: 0;
  margin: 0 0 32px;
  flex-grow: 1;
}

.course-features li {
  font-size: 14px;
  color: #C0C8D2;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.course-features li::before {
  content: "✓";
  color: var(--py-yellow);
  font-weight: 700;
}

.course-pricing {
  border-top: 1px solid var(--line);
  padding-top: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.course-duration {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--muted);
}

.course-price {
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
}

.btn-course {
  width: 100%;
  text-align: center;
  padding: 12px;
  border-radius: 6px;
  font-weight: 700;
  font-size: 14.5px;
  transition: all 0.2s;
  border: 1px solid var(--line-light);
  color: var(--text);
  background: var(--surface-elevated);
}

.btn-course:hover {
  background: var(--py-yellow);
  color: #0C1017;
  border-color: var(--py-yellow);
}

/* ==================== YOUTUBE CARD ==================== */
.channel {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow: hidden;
  transition: border-color 0.2s, transform 0.2s;
  background: #111722;
}

.channel:hover {
  color: var(--text);
  border-color: var(--py-yellow);
  transform: translateY(-2px);
}

.channel-art {
  min-height: 270px;
  background-color: #121A28;
  background-image: 
    linear-gradient(rgba(247, 206, 62, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(247, 206, 62, 0.05) 1px, transparent 1px);
  background-size: 24px 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 20px;
  font-family: var(--mono);
  color: var(--py-yellow);
  padding: 30px;
}

.code-line {
  font-size: 13.5px;
  opacity: 0.85;
}

.play {
  display: grid;
  place-items: center;
  width: 72px;
  height: 72px;
  border: 1px solid rgba(247, 206, 62, 0.4);
  border-radius: 50%;
  font-size: 24px;
  padding-left: 5px;
  transition: all 0.2s ease;
  background: rgba(247, 206, 62, 0.08);
}

.channel:hover .play {
  background: var(--py-yellow);
  color: #0C1017;
  transform: scale(1.08);
}

.art-caption {
  font-size: 12px;
  letter-spacing: 2px;
  color: var(--py-cyan);
}

.channel-copy {
  padding: 44px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.channel-copy .eyebrow {
  margin-bottom: 12px;
}

.channel-copy h3 {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.6px;
  margin: 0 0 14px;
}

.channel-copy p {
  color: var(--muted);
  font-size: 16px;
  line-height: 1.7;
  margin: 0 0 24px;
}

.channel-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  color: var(--py-yellow);
  font-size: 15px;
}

/* ==================== FOOTER ==================== */
.footer {
  border-top: 1px solid var(--line);
  padding-block: 48px 56px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.footer-logo {
  height: 38px;
  width: auto;
}

.footer p {
  font-size: 13.5px;
  color: var(--muted);
  margin: 12px 0 0;
}

.footer nav {
  gap: 24px;
  font-size: 13.5px;
  font-weight: 500;
  color: var(--muted);
}

.footer nav a:hover {
  color: var(--py-yellow);
}

/* ==================== RESPONSIVO ==================== */
@media (max-width: 960px) {
  .hero {
    grid-template-columns: 1fr;
    gap: 48px;
    padding-block: 60px 70px;
  }
  
  .terminal-card {
    max-width: 540px;
  }

  .channel {
    grid-template-columns: 1fr;
  }

  .channel-art {
    min-height: 220px;
  }

  .channel-copy {
    padding: 32px;
  }
}

@media (max-width: 680px) {
  .container {
    width: calc(100% - 36px);
  }

  .header {
    padding-block: 20px;
  }

  nav {
    gap: 18px;
    font-size: 14px;
  }

  .nav-social {
    display: none;
  }

  h1 {
    font-size: 36px;
    letter-spacing: -1.2px;
  }

  .hero-description {
    font-size: 16px;
  }

  .section-heading {
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
    margin-bottom: 32px;
  }

  .section {
    padding: 56px 0;
  }

  .content-grid, .courses-grid {
    grid-template-columns: 1fr;
  }

  .footer {
    flex-direction: column;
    align-items: flex-start;
    gap: 28px;
  }

  .footer nav {
    flex-wrap: wrap;
    gap: 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  * {
    transition: none !important;
  }
}