:root {
  --bg: #070812;
  --bg-soft: #0d1020;
  --panel: rgba(255, 255, 255, 0.08);
  --panel-strong: rgba(255, 255, 255, 0.13);
  --line: rgba(255, 255, 255, 0.16);
  --text: #f5f7ff;
  --muted: #aeb6d6;
  --dim: #7781a5;
  --pink: #ff4fd8;
  --violet: #8b5cf6;
  --cyan: #39d5ff;
  --green: #63f7b4;
  --yellow: #ffe27a;
  --shadow: 0 25px 90px rgba(0, 0, 0, 0.45);
  --radius: 28px;
  --radius-sm: 18px;
  --max: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 18% 0%, rgba(255, 79, 216, 0.26), transparent 34rem),
    radial-gradient(circle at 88% 18%, rgba(57, 213, 255, 0.18), transparent 32rem),
    linear-gradient(135deg, #070812 0%, #0b1024 48%, #13081e 100%);
  overflow-x: hidden;
}

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

button,
input,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

.noise {
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.2;
  background-image: linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: linear-gradient(to bottom, black, transparent 84%);
  z-index: -2;
}

.orb {
  position: fixed;
  width: 28rem;
  height: 28rem;
  border-radius: 999px;
  filter: blur(48px);
  opacity: 0.24;
  pointer-events: none;
  z-index: -3;
}

.orb-a {
  top: 8rem;
  left: -12rem;
  background: var(--pink);
}

.orb-b {
  right: -10rem;
  bottom: 12rem;
  background: var(--cyan);
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem clamp(1rem, 3vw, 2.5rem);
  background: rgba(7, 8, 18, 0.72);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(20px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  font-weight: 900;
  letter-spacing: -0.03em;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 2.45rem;
  height: 2.45rem;
  border-radius: 0.95rem;
  background: linear-gradient(135deg, var(--pink), var(--cyan));
  color: #050713;
  box-shadow: 0 12px 35px rgba(255, 79, 216, 0.35);
}

.topnav {
  display: flex;
  align-items: center;
  gap: clamp(0.8rem, 2vw, 1.6rem);
  color: var(--muted);
  font-size: 0.95rem;
}

.topnav a {
  transition: color 180ms ease;
}

.topnav a:hover {
  color: var(--text);
}

.section-shell {
  width: min(var(--max), calc(100% - 2rem));
  margin: 0 auto;
  padding: 5rem 0;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.58fr);
  gap: clamp(1.5rem, 4vw, 4rem);
  align-items: center;
  min-height: calc(100vh - 5rem);
}

.eyebrow {
  margin: 0 0 0.9rem;
  color: var(--green);
  text-transform: uppercase;
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.15em;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 860px;
  font-size: clamp(3.3rem, 8vw, 7.6rem);
  line-height: 0.88;
  letter-spacing: -0.08em;
  margin-bottom: 1.4rem;
}

.hero-text {
  max-width: 720px;
  color: var(--muted);
  font-size: clamp(1.08rem, 1.7vw, 1.35rem);
  line-height: 1.7;
}

.hero-actions,
.card-topline,
.deploy-grid,
.stat-grid,
.lab-grid,
.capstone-grid,
.intro-grid {
  display: grid;
  gap: 1rem;
}

.hero-actions {
  grid-template-columns: repeat(2, max-content);
  margin: 2rem 0;
}

.primary-button,
.secondary-button,
.ghost-button,
.copy-button {
  border: 0;
  border-radius: 999px;
  padding: 0.9rem 1.2rem;
  font-weight: 850;
  transition: transform 180ms ease, border-color 180ms ease, background 180ms ease, box-shadow 180ms ease;
}

.primary-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3.1rem;
  color: #050713;
  background: linear-gradient(135deg, var(--green), var(--cyan));
  box-shadow: 0 14px 45px rgba(57, 213, 255, 0.25);
}

.secondary-button,
.ghost-button,
.copy-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3.1rem;
  color: var(--text);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.14);
}

.primary-button:hover,
.secondary-button:hover,
.ghost-button:hover,
.copy-button:hover {
  transform: translateY(-2px);
}

.primary-button.full {
  width: 100%;
}

.ghost-button {
  min-height: 2.5rem;
  padding: 0.65rem 0.95rem;
  color: var(--muted);
}

.copy-button {
  width: max-content;
  min-height: 2.4rem;
  padding: 0.65rem 0.9rem;
  font-size: 0.85rem;
}

.stat-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  max-width: 600px;
}

.stat-grid div {
  padding: 1rem;
  border-radius: 1.4rem;
  background: rgba(255, 255, 255, 0.065);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.stat-grid strong {
  display: block;
  font-size: 2rem;
  letter-spacing: -0.06em;
}

.stat-grid span {
  color: var(--muted);
  font-size: 0.88rem;
}

.glass-card {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.12), rgba(255, 255, 255, 0.045));
  box-shadow: var(--shadow);
  backdrop-filter: blur(22px);
}

.glass-card::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.18), transparent 34%, rgba(57, 213, 255, 0.08));
}

.hero-card {
  padding: 1.4rem;
}

.card-topline {
  grid-template-columns: repeat(2, max-content);
  justify-content: space-between;
  align-items: center;
  color: var(--muted);
}

.pill {
  display: inline-flex;
  align-items: center;
  width: max-content;
  border-radius: 999px;
  padding: 0.38rem 0.72rem;
  color: var(--green);
  border: 1px solid rgba(99, 247, 180, 0.28);
  background: rgba(99, 247, 180, 0.09);
  font-weight: 850;
  font-size: 0.78rem;
}

.progress-ring {
  position: relative;
  display: grid;
  place-items: center;
  width: min(100%, 290px);
  aspect-ratio: 1;
  margin: 1.6rem auto 1.2rem;
}

.progress-ring svg {
  position: absolute;
  inset: 0;
  transform: rotate(-90deg);
}

.progress-ring circle {
  fill: none;
  stroke-width: 11;
  stroke: rgba(255, 255, 255, 0.11);
}

.progress-ring .ring-value {
  stroke: url(#fake);
  stroke: var(--cyan);
  stroke-linecap: round;
  stroke-dasharray: 314;
  stroke-dashoffset: 314;
  transition: stroke-dashoffset 450ms ease;
}

.progress-ring div {
  text-align: center;
}

.progress-ring strong {
  display: block;
  font-size: 3rem;
  letter-spacing: -0.08em;
}

.progress-ring span,
.micro-label,
.muted {
  color: var(--muted);
}

.mission-preview {
  padding: 1.2rem;
  border-radius: 1.4rem;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.mission-preview h2 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.mission-preview p:last-child {
  color: var(--muted);
  margin: 0;
  line-height: 1.6;
}

.intro-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  padding-top: 0;
}

.feature-card,
.capstone-card,
.deploy-card,
.lab-card {
  padding: 1.35rem;
}

.feature-icon,
.step-number {
  display: grid;
  place-items: center;
  width: 3rem;
  height: 3rem;
  border-radius: 1.1rem;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.13);
  color: var(--cyan);
  font-weight: 950;
  margin-bottom: 1rem;
}

.feature-card h2,
.deploy-card h3,
.capstone-card h3,
.lab-card h3 {
  letter-spacing: -0.04em;
  margin-bottom: 0.7rem;
}

.feature-card p,
.deploy-card p,
.capstone-card p,
.lab-card p,
.module-card p,
.module-card li {
  color: var(--muted);
  line-height: 1.65;
}

.section-heading {
  display: grid;
  gap: 0.6rem;
  max-width: 770px;
  margin-bottom: 2rem;
}

.section-heading h2 {
  margin: 0;
  font-size: clamp(2.1rem, 4vw, 4rem);
  line-height: 0.95;
  letter-spacing: -0.07em;
}

.section-heading p:last-child {
  margin: 0;
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.7;
}

.section-heading.compact {
  max-width: 720px;
}

.course-layout {
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  gap: 1.2rem;
  align-items: start;
}

.sidebar {
  position: sticky;
  top: 6rem;
  padding: 1.1rem;
}

.sidebar h3 {
  letter-spacing: -0.03em;
}

.mission-nav {
  display: grid;
  gap: 0.55rem;
  list-style: none;
  padding: 0;
  margin: 0 0 1rem;
}

.mission-nav a {
  display: grid;
  grid-template-columns: 2.2rem minmax(0, 1fr) max-content;
  align-items: center;
  gap: 0.65rem;
  padding: 0.75rem;
  border-radius: 1rem;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.mission-nav a.complete {
  color: var(--text);
  border-color: rgba(99, 247, 180, 0.28);
  background: rgba(99, 247, 180, 0.08);
}

.nav-num {
  display: grid;
  place-items: center;
  width: 2.1rem;
  height: 2.1rem;
  border-radius: 0.75rem;
  background: rgba(255, 255, 255, 0.08);
  color: var(--cyan);
  font-weight: 900;
}

.nav-time {
  color: var(--dim);
  font-size: 0.8rem;
}

.sidebar-note {
  padding: 1rem;
  border-radius: 1.2rem;
  background: rgba(255, 255, 255, 0.055);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.sidebar-note p {
  margin: 0.7rem 0 0;
  color: var(--muted);
  line-height: 1.6;
}

.modules {
  display: grid;
  gap: 1rem;
}

.module-card {
  padding: 1rem;
}

.module-header {
  display: grid;
  grid-template-columns: minmax(0, 1fr) max-content;
  gap: 1rem;
  align-items: start;
  padding: 1rem;
}

.module-kicker {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.9rem;
}

.module-title {
  margin-bottom: 0.6rem;
  font-size: clamp(1.45rem, 3vw, 2.1rem);
  letter-spacing: -0.05em;
}

.module-time {
  color: var(--dim);
  font-weight: 800;
}

.complete-module {
  align-self: center;
}

.module-body {
  display: none;
  gap: 1rem;
  padding: 0 1rem 1rem;
}

.module-card.open .module-body {
  display: grid;
}

.lesson-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.lesson-box {
  padding: 1rem;
  border-radius: 1.2rem;
  background: rgba(255, 255, 255, 0.055);
  border: 1px solid rgba(255, 255, 255, 0.09);
}

.lesson-box h4 {
  margin: 0 0 0.55rem;
  color: var(--text);
}

.lesson-box ul,
.clean-list,
.source-list {
  display: grid;
  gap: 0.6rem;
  margin: 0;
  padding-left: 1.1rem;
}

.prompt-strip {
  display: grid;
  gap: 0.8rem;
  padding: 1rem;
  border-radius: 1.2rem;
  background: rgba(7, 8, 18, 0.52);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.prompt-strip pre,
.prompt-output {
  margin: 0;
  white-space: pre-wrap;
  word-wrap: break-word;
  color: #e9efff;
  background: rgba(0, 0, 0, 0.24);
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: 1rem;
  padding: 1rem;
  line-height: 1.55;
  min-height: 7rem;
}

.lab-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.lab-card {
  display: grid;
  gap: 0.9rem;
}

label {
  color: var(--text);
  font-weight: 800;
}

input,
textarea {
  width: 100%;
  color: var(--text);
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.13);
  border-radius: 1rem;
  padding: 0.95rem;
  outline: none;
}

textarea {
  resize: vertical;
}

input:focus,
textarea:focus {
  border-color: rgba(57, 213, 255, 0.55);
  box-shadow: 0 0 0 4px rgba(57, 213, 255, 0.08);
}

.capstone-grid {
  grid-template-columns: 1fr 1fr 1.25fr;
}

.clean-list {
  padding-left: 1rem;
}

.checklist {
  display: grid;
  gap: 0.8rem;
}

.checklist label {
  display: grid;
  grid-template-columns: 1.2rem 1fr;
  gap: 0.7rem;
  align-items: start;
  color: var(--muted);
  font-weight: 650;
  line-height: 1.5;
}

.checklist input {
  width: 1.05rem;
  height: 1.05rem;
  accent-color: var(--green);
  margin-top: 0.2rem;
}

.accent-card {
  border-color: rgba(57, 213, 255, 0.28);
}

.always-show {
  min-height: 18rem;
}

.deploy-section {
  padding-top: 3rem;
}

.deploy-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.sources {
  padding: 1.4rem;
  margin-bottom: 5rem;
}

.sources h2 {
  letter-spacing: -0.05em;
}

.sources p {
  color: var(--muted);
  line-height: 1.7;
}

.source-list a {
  color: var(--cyan);
}

.toast {
  position: fixed;
  right: 1.2rem;
  bottom: 1.2rem;
  z-index: 90;
  transform: translateY(1rem);
  opacity: 0;
  pointer-events: none;
  padding: 0.85rem 1rem;
  border-radius: 999px;
  background: rgba(8, 11, 24, 0.92);
  border: 1px solid rgba(255, 255, 255, 0.14);
  box-shadow: var(--shadow);
  transition: opacity 180ms ease, transform 180ms ease;
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1040px) {
  .topnav {
    display: none;
  }

  .hero,
  .course-layout,
  .intro-grid,
  .lab-grid,
  .capstone-grid,
  .deploy-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 3rem;
    min-height: auto;
  }

  .sidebar {
    position: relative;
    top: 0;
  }

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

@media (max-width: 680px) {
  .section-shell {
    width: min(100% - 1rem, var(--max));
    padding: 3.5rem 0;
  }

  .topbar {
    padding: 0.8rem;
  }

  .ghost-button {
    display: none;
  }

  h1 {
    font-size: clamp(3rem, 18vw, 4.5rem);
  }

  .hero-actions,
  .stat-grid {
    grid-template-columns: 1fr;
  }

  .module-header {
    grid-template-columns: 1fr;
  }

  .complete-module {
    width: 100%;
  }
}