:root {
  --bg0: #070a12;
  --bg1: #0b1022;
  --ink: #eaf0ff;
  --muted: rgba(234, 240, 255, 0.72);
  --muted2: rgba(234, 240, 255, 0.55);
  --line: rgba(234, 240, 255, 0.14);
  --card: rgba(14, 18, 35, 0.68);
  --card2: rgba(20, 26, 48, 0.62);
  --accent: #8b5cf6;
  --accent2: #22c55e;
  --accent3: #38bdf8;
  --danger: #ef4444;
  --shadow: 0 18px 60px rgba(0, 0, 0, 0.45);
  --radius: 18px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: radial-gradient(1000px 800px at 10% 10%, rgba(139, 92, 246, 0.22), transparent 55%),
              radial-gradient(900px 700px at 90% 20%, rgba(56, 189, 248, 0.18), transparent 58%),
              linear-gradient(180deg, var(--bg0), var(--bg1));
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.7;
}

.bg {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -1;
}

.bg__grid {
  position: absolute;
  inset: -30vh -10vw;
  background-image: linear-gradient(to right, rgba(234, 240, 255, 0.05) 1px, transparent 1px),
                    linear-gradient(to bottom, rgba(234, 240, 255, 0.05) 1px, transparent 1px);
  background-size: 48px 48px;
  transform: rotate(-8deg);
  opacity: 0.35;
  mask-image: radial-gradient(circle at 50% 30%, black 10%, transparent 65%);
}

.bg__orb {
  position: absolute;
  width: 56vmin;
  height: 56vmin;
  border-radius: 999px;
  filter: blur(40px);
  opacity: 0.55;
}

.bg__orb--a {
  left: -10vmin;
  top: -8vmin;
  background: radial-gradient(circle at 30% 30%, rgba(139, 92, 246, 0.95), transparent 60%);
}

.bg__orb--b {
  right: -14vmin;
  top: 10vmin;
  background: radial-gradient(circle at 40% 35%, rgba(56, 189, 248, 0.85), transparent 62%);
}

/* Header */
.topbar {
  position: fixed;
  left: 0;
  right: 0;
  top: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
  z-index: 100;
  background: linear-gradient(180deg, rgba(7, 10, 18, 0.95), rgba(7, 10, 18, 0.75));
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}

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

.mark {
  width: 14px;
  height: 14px;
  border-radius: 4px;
  background: linear-gradient(135deg, var(--accent), var(--accent3));
  box-shadow: 0 0 0 6px rgba(139, 92, 246, 0.12);
}

.topbar__title {
  font-weight: 700;
  letter-spacing: -0.02em;
  font-size: 1rem;
}

.topbar__subtitle {
  font-size: 12px;
  color: var(--muted2);
}

/* Container */
.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 100px 24px 60px;
}

/* Hero */
.hero {
  text-align: center;
  padding: 60px 0 80px;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: rgba(139, 92, 246, 0.15);
  border: 1px solid rgba(139, 92, 246, 0.3);
  border-radius: 999px;
  font-size: 13px;
  color: var(--accent);
  margin-bottom: 24px;
  font-weight: 600;
}

.hero__badge::before {
  content: "🎤";
}

.hero__title {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.04em;
  margin-bottom: 20px;
}

.hero__title-accent {
  background: linear-gradient(90deg, var(--accent), var(--accent3));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero__lead {
  font-size: 1.25rem;
  color: var(--muted);
  max-width: 600px;
  margin: 0 auto 32px;
}

.hero__cta-row {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 24px;
  border-radius: 999px;
  border: 1px solid rgba(234, 240, 255, 0.16);
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.85), rgba(56, 189, 248, 0.70));
  color: var(--ink);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
  transition: all 0.2s;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 40px rgba(0, 0, 0, 0.35);
}

.btn--ghost {
  background: rgba(234, 240, 255, 0.06);
  box-shadow: none;
}

.btn--ghost:hover {
  background: rgba(234, 240, 255, 0.12);
  transform: none;
}

/* Sections */
.section {
  margin-bottom: 80px;
}

.section__header {
  margin-bottom: 32px;
}

.section__number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--accent), var(--accent3));
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 16px;
  box-shadow: 0 8px 24px rgba(139, 92, 246, 0.3);
}

.section__title {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.section__subtitle {
  color: var(--muted);
  font-size: 1rem;
}

/* Cards */
.card {
  background: linear-gradient(180deg, var(--card2), var(--card));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 20px;
  box-shadow: var(--shadow);
}

.card--highlight {
  border-color: rgba(139, 92, 246, 0.4);
  background: linear-gradient(180deg, rgba(139, 92, 246, 0.12), var(--card));
}

.card__icon {
  font-size: 2rem;
  margin-bottom: 12px;
}

.card__title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.card__text {
  color: var(--muted);
  font-size: 0.95rem;
}

/* Quote */
.quote {
  background: linear-gradient(180deg, rgba(139, 92, 246, 0.08), transparent);
  border-left: 4px solid var(--accent);
  padding: 24px 28px;
  margin: 32px 0;
  border-radius: 0 var(--radius) var(--radius) 0;
  font-size: 1.15rem;
  font-style: italic;
  color: var(--ink);
}

.quote__mark {
  font-size: 3rem;
  color: rgba(139, 92, 246, 0.4);
  line-height: 1;
  margin-right: 8px;
}

.quote__source {
  display: block;
  margin-top: 12px;
  font-size: 0.85rem;
  font-style: normal;
  color: var(--muted2);
}

/* Steps */
.steps {
  counter-reset: step;
}

.step {
  position: relative;
  padding-left: 72px;
  margin-bottom: 40px;
}

.step::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent3));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.25rem;
  box-shadow: 0 8px 24px rgba(139, 92, 246, 0.3);
}

.step__title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.step__content {
  color: var(--muted);
}

.step__content strong {
  color: var(--ink);
}

/* Do's and Don'ts */
.dos-donts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  margin: 32px 0;
}

.do-card, .dont-card {
  background: linear-gradient(180deg, var(--card2), var(--card));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
}

.do-card {
  border-color: rgba(34, 197, 94, 0.4);
}

.dont-card {
  border-color: rgba(239, 68, 68, 0.4);
}

.do-card__header, .dont-card__header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
  font-weight: 700;
  font-size: 1.1rem;
}

.do-card__header {
  color: var(--accent2);
}

.dont-card__header {
  color: var(--danger);
}

.do-card ul, .dont-card ul {
  list-style: none;
  padding: 0;
}

.do-card li, .dont-card li {
  position: relative;
  padding-left: 24px;
  margin-bottom: 10px;
  color: var(--muted);
  font-size: 0.95rem;
}

.do-card li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--accent2);
  font-weight: 700;
}

.dont-card li::before {
  content: "✕";
  position: absolute;
  left: 0;
  color: var(--danger);
  font-weight: 700;
}

/* Tip box */
.tip {
  background: linear-gradient(135deg, rgba(56, 189, 248, 0.12), rgba(139, 92, 246, 0.08));
  border: 1px solid rgba(56, 189, 248, 0.3);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin: 24px 0;
  display: flex;
  gap: 12px;
}

.tip__icon {
  font-size: 1.5rem;
  flex-shrink: 0;
}

.tip__content {
  color: var(--muted);
  font-size: 0.95rem;
}

.tip__content strong {
  color: var(--ink);
}

/* Download Section */
.download-section {
  background: linear-gradient(180deg, var(--card2), var(--card));
  border: 2px solid rgba(139, 92, 246, 0.4);
  border-radius: var(--radius);
  padding: 40px;
  text-align: center;
  margin: 60px 0;
}

.download-section__title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.download-section__desc {
  color: var(--muted);
  margin-bottom: 24px;
}

/* Credit */
.credit {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 32px;
  margin-top: 60px;
  display: flex;
  gap: 20px;
  align-items: flex-start;
}

.credit__avatar {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent3));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 800;
  flex-shrink: 0;
}

.credit__name {
  font-weight: 700;
  font-size: 1.1rem;
  margin-bottom: 4px;
}

.credit__bio {
  color: var(--muted);
  font-size: 0.9rem;
  margin-bottom: 12px;
}

.credit__links {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.credit__link {
  color: var(--accent);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 4px;
}

.credit__link:hover {
  text-decoration: underline;
}

/* Footer */
.footer {
  border-top: 1px solid var(--line);
  padding: 24px;
  text-align: center;
  color: var(--muted2);
  font-size: 0.85rem;
  margin-top: 80px;
}

.footer a {
  color: var(--accent);
  text-decoration: none;
}

.footer a:hover {
  text-decoration: underline;
}

/* Key Insight */
.key-insight {
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.15), rgba(56, 189, 248, 0.1));
  border: 1px solid rgba(139, 92, 246, 0.3);
  border-radius: var(--radius);
  padding: 24px 28px;
  margin: 24px 0;
}

.key-insight__label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  font-weight: 700;
  margin-bottom: 8px;
}

.key-insight__text {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--ink);
}

/* Code/Prompt block */
.prompt-block {
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 20px;
  margin: 20px 0;
  font-family: 'SF Mono', Monaco, Consolas, monospace;
  font-size: 0.85rem;
  color: var(--muted);
  overflow-x: auto;
  position: relative;
}

.prompt-block__copy {
  position: absolute;
  top: 12px;
  right: 12px;
  background: rgba(139, 92, 246, 0.3);
  border: none;
  border-radius: 6px;
  padding: 6px 12px;
  color: var(--ink);
  font-size: 0.75rem;
  cursor: pointer;
  transition: background 0.2s;
}

.prompt-block__copy:hover {
  background: rgba(139, 92, 246, 0.5);
}

/* Percentage highlight */
.percent {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--accent), var(--accent3));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-weight: 800;
  font-size: 1.2em;
}

/* Mobile */
@media (max-width: 640px) {
  .container {
    padding: 90px 16px 40px;
  }
  
  .hero {
    padding: 40px 0 60px;
  }
  
  .step {
    padding-left: 56px;
  }
  
  .step::before {
    width: 40px;
    height: 40px;
    font-size: 1rem;
  }
  
  .credit {
    flex-direction: column;
    text-align: center;
    align-items: center;
  }
  
  .dos-donts {
    grid-template-columns: 1fr;
  }
  
  .download-section {
    padding: 28px 20px;
  }
}