:root {
  --bg: #0f1117;
  --bg-surface: #181b23;
  --bg-elevated: #1f2330;
  --border: #2a2e3a;
  --text: #e8eaf0;
  --text-muted: #7a8099;
  --accent: #c8ff47;
  --accent-dim: #a8e630;
  --green: #4ade80;
  --tag-bg: #1a2236;
  --tag-text: #6b8aff;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'DM Sans', sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ── Topbar ── */
.topbar {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px 48px;
  border-bottom: 1px solid var(--border);
}

.wordmark {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.3px;
  color: var(--accent);
}

.tagline {
  font-size: 13px;
  color: var(--text-muted);
  letter-spacing: 0.02em;
}

/* ── Hero ── */
.hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
  padding: 80px 48px 100px;
  min-height: 600px;
}

.hero-left { display: flex; flex-direction: column; gap: 28px; }

.eyebrow {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  font-family: 'Space Grotesk', sans-serif;
}

.hero-headline {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(36px, 4.5vw, 58px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.04em;
  color: #ffffff;
}

.hero-sub {
  font-size: 17px;
  color: var(--text-muted);
  max-width: 420px;
  line-height: 1.7;
}

/* ── Canvas mockup ── */
.canvas-frame {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 24px 80px rgba(0,0,0,0.5), 0 0 0 1px rgba(200,255,71,0.06);
}

.canvas-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-elevated);
}

.list-label {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
}

.list-count {
  font-size: 12px;
  color: var(--text-muted);
  background: var(--border);
  padding: 2px 8px;
  border-radius: 10px;
}

.canvas-body { padding: 16px 20px; display: flex; flex-direction: column; gap: 2px; }

.task-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 7px 0;
  border-radius: 6px;
}

.task-item:hover { background: var(--bg-elevated); }

.check {
  width: 16px;
  height: 16px;
  border: 1.5px solid var(--border);
  border-radius: 4px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.check.done {
  background: var(--accent);
  border-color: var(--accent);
  color: #0f1117;
  font-size: 10px;
}

.task-text {
  font-size: 13.5px;
  color: var(--text);
  flex: 1;
}

.task-text.struck {
  text-decoration: line-through;
  color: var(--text-muted);
}

.due {
  font-size: 11px;
  color: var(--accent-dim);
  font-family: 'Space Grotesk', sans-serif;
  flex-shrink: 0;
}

.tag {
  font-size: 10px;
  padding: 2px 7px;
  border-radius: 4px;
  background: var(--tag-bg);
  color: var(--tag-text);
  font-family: 'Space Grotesk', sans-serif;
  flex-shrink: 0;
}

.subtask { padding-left: 24px; }
.subtask .task-text { font-size: 12.5px; color: var(--text-muted); }

.quick-add {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 4px;
  margin-top: 8px;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 13px;
}

.plus { font-size: 18px; font-weight: 300; color: var(--text-muted); }

/* ── Philosophy ── */
.philosophy {
  background: var(--bg-surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 64px 48px;
}

.philosophy-inner {
  max-width: 760px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 40px;
  align-items: start;
}

.philosophy-mark {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  padding-top: 6px;
}

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

.philosophy-body p {
  font-size: 16px;
  color: var(--text-muted);
  line-height: 1.8;
}

/* ── Features ── */
.features { padding: 80px 48px; }

.features-inner { max-width: 1100px; margin: 0 auto; }

.features-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
}

.feature-card {
  background: var(--bg-surface);
  padding: 36px 32px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: background 0.2s;
}

.feature-card:hover { background: var(--bg-elevated); }

.feature-icon {
  color: var(--accent);
  width: 24px;
}

.feature-card h3 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
}

.feature-card p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ── How ── */
.how { padding: 72px 48px; border-top: 1px solid var(--border); }

.how-inner { max-width: 760px; margin: 0 auto; }

.how-header { margin-bottom: 48px; }

.section-label {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.how-steps {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.step {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 32px;
  align-items: start;
  padding: 32px 0;
  border-bottom: 1px solid var(--border);
}

.step:last-child { border-bottom: none; }

.step-num {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 40px;
  font-weight: 700;
  color: var(--border);
  letter-spacing: -0.05em;
  line-height: 1;
}

.step-text strong {
  display: block;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 17px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
}

.step-text p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ── Closing ── */
.closing {
  padding: 80px 48px 100px;
  border-top: 1px solid var(--border);
}

.closing-inner { max-width: 760px; margin: 0 auto; }

.closing-statement {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(22px, 3vw, 32px);
  font-weight: 600;
  color: var(--text);
  line-height: 1.4;
  letter-spacing: -0.02em;
}

/* ── Footer ── */
.footer {
  border-top: 1px solid var(--border);
  padding: 32px 48px;
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.wordmark-sm {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 15px;
  font-weight: 700;
  color: var(--text-muted);
}

.footer-note {
  font-size: 13px;
  color: var(--text-muted);
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .topbar { padding: 16px 24px; }
  .hero { grid-template-columns: 1fr; gap: 40px; padding: 48px 24px 64px; }
  .philosophy { padding: 48px 24px; }
  .philosophy-inner { grid-template-columns: 1fr; gap: 16px; }
  .features { padding: 48px 24px; }
  .features-grid { grid-template-columns: 1fr; }
  .how { padding: 48px 24px; }
  .step { grid-template-columns: 52px 1fr; gap: 20px; padding: 24px 0; }
  .step-num { font-size: 28px; }
  .closing { padding: 48px 24px 64px; }
  .footer { padding: 24px; }
  .footer-inner { flex-direction: column; gap: 8px; align-items: flex-start; }
}

@media (max-width: 480px) {
  .topbar { padding: 14px 20px; }
  .tagline { display: none; }
  .hero { padding: 40px 20px 56px; }
  .hero-headline { font-size: 32px; }
  .philosophy { padding: 40px 20px; }
  .features { padding: 40px 20px; }
  .feature-card { padding: 28px 20px; }
  .how { padding: 40px 20px; }
  .closing { padding: 40px 20px 56px; }
}