/* === BASE === */
:root {
  --bg: #07090D;
  --surface: #0C1018;
  --surface2: #111622;
  --border: #1C2333;
  --fg: #E4EAF4;
  --fg2: #8892A4;
  --fg3: #4A5568;
  --accent: #F97316;
  --accent-dim: rgba(249, 115, 22, 0.10);
  --accent-glow: rgba(249, 115, 22, 0.20);
  --success: #22C55E;
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'DM Sans', sans-serif;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* === NAV === */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 0 40px;
  height: 60px;
  display: flex;
  align-items: center;
  border-bottom: 1px solid var(--border);
  background: rgba(7, 9, 13, 0.85);
  backdrop-filter: blur(12px);
}

.nav-inner {
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--fg);
}

.nav-tag {
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--fg2);
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 4px 10px;
  border-radius: 20px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

/* === HERO === */
.hero {
  min-height: calc(100vh - 60px);
  display: flex;
  align-items: center;
  padding: 80px 40px 100px;
  background: var(--bg);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -200px;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--accent-dim) 0%, transparent 70%);
  pointer-events: none;
}

.hero-inner {
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
  color: var(--accent);
  font-weight: 500;
  margin-bottom: 24px;
  letter-spacing: 0.01em;
}

.badge-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hero-headline {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 4.5vw, 3.6rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.035em;
  color: var(--fg);
  margin-bottom: 24px;
}

.hero-sub {
  font-size: 1.05rem;
  color: var(--fg2);
  line-height: 1.7;
  max-width: 460px;
  margin-bottom: 48px;
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 0;
}

.stat {
  padding-right: 32px;
}

.stat-value {
  display: block;
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: -0.03em;
  margin-bottom: 4px;
}

.stat-label {
  display: block;
  font-size: 0.72rem;
  color: var(--fg2);
  line-height: 1.4;
  max-width: 120px;
}

.stat-divider {
  width: 1px;
  height: 40px;
  background: var(--border);
  margin-right: 32px;
  flex-shrink: 0;
}

/* === EMAIL MOCKUP === */
.hero-right {
  display: flex;
  justify-content: center;
}

.email-mockup {
  width: 100%;
  max-width: 420px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 40px 80px rgba(0,0,0,0.5), 0 0 60px var(--accent-dim);
}

.mockup-header {
  background: var(--surface2);
  padding: 14px 18px;
  display: flex;
  align-items: center;
  gap: 12px;
  border-bottom: 1px solid var(--border);
}

.mockup-dots {
  display: flex;
  gap: 5px;
}

.mockup-dots span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--border);
}

.mockup-dots span:first-child { background: #FF5F57; }
.mockup-dots span:nth-child(2) { background: #FFBD2E; }
.mockup-dots span:last-child { background: #28C840; }

.mockup-label {
  font-size: 0.72rem;
  color: var(--fg2);
  font-weight: 500;
}

.mockup-body {
  padding: 24px;
}

.research-block, .email-block, .send-block {
  padding: 0;
}

.block-label {
  display: block;
  font-size: 0.65rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.block-line {
  height: 8px;
  background: var(--surface2);
  border-radius: 4px;
  margin-bottom: 8px;
}

.w-30 { width: 30%; }
.w-40 { width: 40%; }
.w-50 { width: 50%; }
.w-60 { width: 60%; }
.w-70 { width: 70%; }
.w-80 { width: 80%; }
.w-85 { width: 85%; }
.w-90 { width: 90%; }
.w-100 { width: 100%; }

.block-divider {
  height: 1px;
  background: var(--border);
  margin: 20px 0;
}

.send-steps {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 8px;
}

.step {
  font-size: 0.7rem;
  padding: 5px 10px;
  border-radius: 6px;
  font-weight: 500;
}

.step.sent {
  background: var(--surface2);
  color: var(--fg3);
}

.step.open {
  background: var(--accent-dim);
  color: var(--accent);
}

.step.reply {
  background: rgba(34, 197, 94, 0.1);
  color: var(--success);
}

.step-arrow {
  color: var(--fg3);
  font-size: 0.8rem;
}

/* === FEATURES === */
.features {
  padding: 100px 40px;
  background: var(--surface);
  border-top: 1px solid var(--border);
}

.features-inner {
  max-width: 1200px;
  margin: 0 auto;
}

.features-header {
  margin-bottom: 64px;
  text-align: center;
}

.section-tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.section-headline {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.2;
  color: var(--fg);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 32px;
  transition: border-color 0.2s, transform 0.2s;
}

.feature-card:hover {
  border-color: rgba(249, 115, 22, 0.3);
  transform: translateY(-2px);
}

.feature-card.featured {
  border-color: rgba(249, 115, 22, 0.25);
  background: linear-gradient(135deg, var(--bg) 0%, var(--accent-dim) 100%);
  position: relative;
}

.feature-card.featured::before {
  content: 'Core';
  position: absolute;
  top: 20px;
  right: 20px;
  font-size: 0.65rem;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-dim);
  padding: 3px 8px;
  border-radius: 4px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: var(--accent-dim);
  border: 1px solid rgba(249, 115, 22, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  margin-bottom: 24px;
}

.feature-title {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--fg);
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}

.feature-desc {
  font-size: 0.88rem;
  color: var(--fg2);
  line-height: 1.7;
  margin-bottom: 24px;
}

.feature-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.feature-tags span {
  font-size: 0.68rem;
  color: var(--fg2);
  background: var(--surface2);
  border: 1px solid var(--border);
  padding: 4px 8px;
  border-radius: 4px;
}

/* === CLOSING === */
.closing {
  padding: 120px 40px;
  background: var(--bg);
  border-top: 1px solid var(--border);
  text-align: center;
}

.closing-inner {
  max-width: 800px;
  margin: 0 auto;
}

.closing-headline {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.2;
  color: var(--fg);
  margin-bottom: 28px;
}

.closing-sub {
  font-size: 1rem;
  color: var(--fg2);
  line-height: 1.7;
  margin-bottom: 48px;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

.closing-tagline {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: -0.02em;
}

/* === DEMO === */
.demo {
  padding: 100px 40px;
  background: var(--bg);
  border-top: 1px solid var(--border);
}

.demo-inner {
  max-width: 800px;
  margin: 0 auto;
}

.demo-header {
  text-align: center;
  margin-bottom: 56px;
}

.demo-sub {
  font-size: 1rem;
  color: var(--fg2);
  line-height: 1.7;
  margin-top: 16px;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

.demo-widget {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 40px;
  box-shadow: 0 40px 80px rgba(0,0,0,0.4);
}

.demo-input-group {
  margin-bottom: 20px;
}

.demo-label {
  display: block;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--fg2);
  margin-bottom: 8px;
  letter-spacing: 0.01em;
}

.demo-label-optional {
  color: var(--fg3);
  font-weight: 400;
}

.demo-input {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 0.95rem;
  padding: 14px 16px;
  outline: none;
  transition: border-color 0.2s;
}

.demo-input::placeholder { color: var(--fg3); }

.demo-input:focus {
  border-color: rgba(249, 115, 22, 0.5);
  box-shadow: 0 0 0 3px rgba(249, 115, 22, 0.08);
}

.demo-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--accent);
  color: #fff;
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  padding: 14px 28px;
  border-radius: 10px;
  border: none;
  cursor: pointer;
  transition: opacity 0.15s, transform 0.15s;
  text-decoration: none;
  margin-top: 8px;
}

.demo-btn:hover { opacity: 0.9; transform: translateY(-1px); }
.demo-btn:active { transform: translateY(0); }
.demo-btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

.demo-rate-info {
  margin-top: 12px;
  font-size: 0.75rem;
  color: var(--fg3);
}

.demo-loading { padding: 12px 0; }

.demo-loading-inner {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.loading-step {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.88rem;
  color: var(--fg2);
}

.step-indicator {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--fg3);
  flex-shrink: 0;
  transition: all 0.3s;
}

.step-indicator.active {
  border-color: var(--accent);
  color: var(--accent);
  animation: spin-glow 1.2s linear infinite;
}

.step-indicator.done {
  border-color: var(--success);
  color: var(--success);
  background: rgba(34, 197, 94, 0.08);
  animation: none;
}

@keyframes spin-glow {
  0%   { box-shadow: 0 0 0 0 rgba(249, 115, 22, 0.4); }
  50%  { box-shadow: 0 0 0 6px rgba(249, 115, 22, 0); }
  100% { box-shadow: 0 0 0 0 rgba(249, 115, 22, 0); }
}

.email-client {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
  margin-bottom: 20px;
}

.email-client-header {
  background: var(--surface2);
  padding: 14px 18px;
  display: flex;
  align-items: center;
  gap: 12px;
  border-bottom: 1px solid var(--border);
}

.email-client-label {
  font-size: 0.72rem;
  color: var(--fg2);
  font-weight: 500;
  flex: 1;
}

.demo-reset-btn {
  font-size: 0.72rem;
  color: var(--fg3);
  background: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 10px;
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s;
  font-family: var(--font-body);
}

.demo-reset-btn:hover { color: var(--fg); border-color: var(--fg3); }

.email-client-meta {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.email-meta-row { display: flex; gap: 16px; align-items: baseline; }

.email-meta-key {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--fg3);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  width: 52px;
  flex-shrink: 0;
}

.email-meta-val { font-size: 0.88rem; color: var(--fg2); }
.email-subject { color: var(--fg); font-weight: 500; }

.email-client-body {
  padding: 24px;
  font-size: 0.92rem;
  color: var(--fg2);
  line-height: 1.8;
  white-space: pre-wrap;
  word-break: break-word;
}

.email-confidence {
  padding: 12px 24px 16px;
  font-size: 0.72rem;
  color: var(--fg3);
  border-top: 1px solid var(--border);
}

.why-block {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
  margin-bottom: 20px;
}

.why-summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  cursor: pointer;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--fg);
  list-style: none;
  user-select: none;
  transition: color 0.2s;
}

.why-summary::-webkit-details-marker { display: none; }
.why-summary:hover { color: var(--accent); }

.why-chevron { transition: transform 0.2s; color: var(--fg3); flex-shrink: 0; }
details[open] .why-chevron { transform: rotate(180deg); }

.why-content {
  padding: 4px 20px 20px;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.why-section-title {
  display: block;
  font-size: 0.68rem;
  font-weight: 600;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 10px;
  margin-top: 16px;
}

.why-signals, .why-pains {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.why-signals li, .why-pains li {
  font-size: 0.84rem;
  color: var(--fg2);
  display: flex;
  gap: 8px;
  align-items: flex-start;
  line-height: 1.5;
}

.why-signals li::before { content: '→'; color: var(--accent); font-size: 0.8rem; flex-shrink: 0; margin-top: 2px; }
.why-pains li::before   { content: '•'; color: var(--fg3); flex-shrink: 0; margin-top: 2px; }

.why-reasoning {
  font-size: 0.82rem;
  color: var(--fg3);
  font-style: italic;
  line-height: 1.6;
  padding-top: 8px;
  border-top: 1px solid var(--border);
  margin-top: 8px;
}

.demo-cta-block {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 20px;
  background: var(--accent-dim);
  border: 1px solid rgba(249, 115, 22, 0.2);
  border-radius: 12px;
}

.demo-cta-text { font-size: 0.88rem; color: var(--fg2); }

.demo-cta-link {
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--accent);
  text-decoration: none;
  white-space: nowrap;
}

.demo-cta-link:hover { text-decoration: underline; }

.demo-rate-limited { text-align: center; padding: 40px 20px; }
.rate-limit-icon { color: var(--fg3); margin-bottom: 20px; }

.rate-limit-title {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--fg);
  margin-bottom: 12px;
}

.rate-limit-sub {
  font-size: 0.9rem;
  color: var(--fg2);
  margin-bottom: 28px;
  max-width: 380px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.6;
}

.demo-error { text-align: center; padding: 32px 20px; }
.demo-error-msg { font-size: 0.9rem; color: var(--fg2); margin-bottom: 20px; }

.waitlist-section {
  margin-top: 64px;
  text-align: center;
  padding: 40px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--surface);
}

.waitlist-title {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--fg);
  margin-bottom: 10px;
  letter-spacing: -0.02em;
}

.waitlist-sub {
  font-size: 0.9rem;
  color: var(--fg2);
  margin-bottom: 28px;
  line-height: 1.6;
}

.waitlist-form {
  display: flex;
  gap: 12px;
  max-width: 440px;
  margin: 0 auto;
}

.waitlist-input {
  flex: 1;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 0.92rem;
  padding: 13px 16px;
  outline: none;
  transition: border-color 0.2s;
}

.waitlist-input::placeholder { color: var(--fg3); }
.waitlist-input:focus { border-color: rgba(249, 115, 22, 0.5); }

.waitlist-submit {
  background: var(--accent);
  color: #fff;
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 600;
  padding: 13px 24px;
  border-radius: 10px;
  border: none;
  cursor: pointer;
  transition: opacity 0.15s;
  white-space: nowrap;
}

.waitlist-submit:hover { opacity: 0.9; }

.waitlist-success {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.9rem;
  color: var(--success);
  margin-top: 16px;
}

@media (max-width: 600px) {
  .demo { padding: 60px 24px; }
  .demo-widget { padding: 24px; }
  .demo-cta-block { flex-direction: column; align-items: flex-start; }
  .waitlist-form { flex-direction: column; }
  .waitlist-section { padding: 28px 20px; }
}

/* === FOOTER === */
.footer {
  border-top: 1px solid var(--border);
  padding: 28px 40px;
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-brand {
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--fg);
}

.footer-copy {
  font-size: 0.75rem;
  color: var(--fg3);
}

/* === RESPONSIVE === */
@media (max-width: 900px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 60px;
  }

  .hero-right {
    order: -1;
  }

  .feature-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .hero-stats {
    flex-wrap: wrap;
    gap: 20px;
  }

  .stat-divider {
    display: none;
  }

  .stat {
    padding-right: 0;
  }
}

@media (max-width: 600px) {
  .hero {
    padding: 60px 24px 80px;
  }

  .features {
    padding: 60px 24px;
  }

  .closing {
    padding: 80px 24px;
  }

  .nav {
    padding: 0 24px;
  }

  .footer {
    padding: 24px;
  }
}