/* ===== NAV ===== */
.app-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 16px 48px;
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: 1080px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--fg);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-link {
  font-size: 0.9rem;
  color: var(--fg-dim);
  text-decoration: none;
  transition: color 0.2s;
}

.nav-link:hover,
.nav-link.active {
  color: var(--fg);
}

.nav-badge {
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent-bright);
  background: var(--accent-glow);
  border: 1px solid var(--accent);
  padding: 4px 10px;
  border-radius: 100px;
}

/* ===== BUTTONS ===== */
.btn-primary {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 12px 24px;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: opacity 0.2s, transform 0.1s;
  white-space: nowrap;
}

.btn-primary:hover {
  opacity: 0.88;
  transform: translateY(-1px);
}

.btn-primary.btn-sm {
  font-size: 0.82rem;
  padding: 8px 16px;
}

.btn-secondary {
  display: inline-block;
  background: transparent;
  color: var(--accent-bright);
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 12px 24px;
  border-radius: 8px;
  border: 1px solid var(--accent);
  cursor: pointer;
  text-decoration: none;
  transition: background 0.2s;
  white-space: nowrap;
}

.btn-secondary:hover {
  background: var(--accent-glow);
}

.btn-outline {
  display: inline-block;
  background: transparent;
  color: var(--fg);
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 12px 24px;
  border-radius: 8px;
  border: 1px solid var(--border);
  cursor: pointer;
  text-decoration: none;
  transition: border-color 0.2s, background 0.2s;
  white-space: nowrap;
  width: 100%;
  text-align: center;
}

.btn-outline:hover {
  border-color: var(--fg-dim);
  background: rgba(255,255,255,0.03);
}

.btn-ghost {
  display: inline-block;
  background: transparent;
  color: var(--fg-dim);
  font-size: 0.9rem;
  padding: 10px 20px;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: color 0.2s;
}

.btn-ghost:hover { color: var(--fg); }

/* ===== EMAIL CAPTURE ===== */
.hero-actions {
  margin-bottom: 56px;
}

.email-capture {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

.email-input {
  flex: 1;
  min-width: 240px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 0.95rem;
  padding: 12px 16px;
  border-radius: 8px;
  outline: none;
  transition: border-color 0.2s;
}

.email-input:focus {
  border-color: var(--accent);
}

.email-input::placeholder {
  color: var(--fg-muted);
}

.hero-microcopy {
  font-size: 0.8rem;
  color: var(--fg-muted);
  margin-top: 8px;
}

.subscribe-msg {
  font-size: 0.85rem;
  margin-top: 8px;
}

.subscribe-error {
  color: var(--danger);
}

.subscribe-success {
  color: var(--success);
  font-size: 0.95rem;
}

/* ===== TIER ENHANCEMENTS ===== */
.tier-price {
  margin: 12px 0 16px;
}

.tier-price-num {
  font-family: var(--font-display);
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--fg);
  line-height: 1;
}

.tier-price-per {
  font-size: 0.9rem;
  color: var(--fg-muted);
  margin-left: 4px;
}

.tier-badge {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent-bright);
  background: var(--accent-glow);
  border: 1px solid var(--accent);
  padding: 3px 10px;
  border-radius: 100px;
  margin-bottom: 12px;
}

.tier-features {
  list-style: none;
  margin: 16px 0 24px;
}

.tier-features li {
  font-size: 0.9rem;
  color: var(--fg-dim);
  padding: 6px 0;
  border-bottom: 1px solid var(--border);
  padding-left: 20px;
  position: relative;
}

.tier-features li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--success);
  font-size: 0.8rem;
}

.tier-card .btn-primary,
.tier-card .btn-secondary,
.tier-card .btn-outline {
  width: 100%;
  text-align: center;
  margin-top: 4px;
}

.tier-subscribe-form {
  flex-direction: column;
  gap: 8px;
}

.tier-subscribe-form .email-input {
  width: 100%;
  min-width: unset;
}

.tier-subscribe-form .btn-secondary {
  width: 100%;
  text-align: center;
}

.checkout-error {
  text-align: center;
  color: var(--danger);
  font-size: 0.9rem;
  margin-top: 20px;
}

/* ===== APP MAIN ===== */
.app-main {
  min-height: 100vh;
  padding-top: 72px;
}

/* ===== PAGE HEADER ===== */
.page-header {
  background: var(--bg-alt);
  border-bottom: 1px solid var(--border);
  padding: 80px 48px 60px;
}

.page-header-inner {
  max-width: 1080px;
  margin: 0 auto;
}

.page-tag {
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent-bright);
  margin-bottom: 16px;
}

.page-header h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3.2rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 16px;
}

.page-sub {
  font-size: 1.05rem;
  color: var(--fg-dim);
  max-width: 600px;
  line-height: 1.7;
}

/* ===== BRIEFS LIST ===== */
.briefs-list {
  max-width: 780px;
  margin: 0 auto;
  padding: 48px 48px 80px;
}

.brief-card {
  display: block;
  text-decoration: none;
  padding: 32px 0;
  border-bottom: 1px solid var(--border);
  transition: opacity 0.2s;
}

.brief-card:last-child {
  border-bottom: none;
}

.brief-card:hover {
  opacity: 0.85;
}

.brief-card-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.brief-tier-tag {
  font-family: var(--font-display);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 3px 8px;
  border-radius: 4px;
}

.brief-tier-free {
  color: var(--success);
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.25);
}

.brief-tier-core,
.brief-tier-enterprise {
  color: var(--accent-bright);
  background: var(--accent-glow);
  border: 1px solid rgba(99, 102, 241, 0.3);
}

.brief-date {
  font-size: 0.8rem;
  color: var(--fg-muted);
}

.brief-card-title {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--fg);
  margin-bottom: 10px;
  letter-spacing: -0.01em;
  line-height: 1.3;
}

.brief-card-summary {
  font-size: 0.95rem;
  color: var(--fg-dim);
  line-height: 1.65;
  margin-bottom: 14px;
}

.brief-read-link {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent-bright);
}

.empty-state {
  text-align: center;
  padding: 80px 0;
  color: var(--fg-muted);
}

/* ===== BRIEF DETAIL ===== */
.brief-detail {
  max-width: 700px;
  margin: 0 auto;
  padding: 48px 48px 100px;
}

.brief-detail-header {
  margin-bottom: 48px;
}

.back-link {
  display: inline-block;
  font-size: 0.85rem;
  color: var(--fg-muted);
  text-decoration: none;
  margin-bottom: 28px;
  transition: color 0.2s;
}

.back-link:hover { color: var(--fg); }

.brief-meta-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.brief-title {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin-bottom: 20px;
}

.brief-summary {
  font-size: 1.05rem;
  color: var(--fg-dim);
  line-height: 1.7;
  border-left: 3px solid var(--accent);
  padding-left: 20px;
}

.brief-body {
  font-size: 1rem;
  color: var(--fg-dim);
  line-height: 1.8;
}

.brief-body h2 {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--fg);
  margin: 36px 0 16px;
}

.brief-body p {
  margin-bottom: 20px;
}

.brief-body strong {
  color: var(--fg);
}

/* ===== PAYWALL ===== */
.paywall {
  margin-top: 48px;
  border-top: 1px solid var(--border);
  padding-top: 48px;
}

.paywall-inner {
  text-align: center;
  padding: 48px 40px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.paywall-icon {
  font-size: 2rem;
  margin-bottom: 20px;
}

.paywall-inner h3 {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 12px;
}

.paywall-inner p {
  font-size: 0.95rem;
  color: var(--fg-dim);
  margin-bottom: 28px;
  max-width: 420px;
  margin-left: auto;
  margin-right: auto;
}

.paywall-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* ===== SUCCESS PAGE ===== */
.success-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 80vh;
}

.success-inner {
  text-align: center;
  max-width: 480px;
  padding: 48px;
}

.success-icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: rgba(16, 185, 129, 0.15);
  border: 2px solid var(--success);
  color: var(--success);
  font-size: 1.8rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 28px;
}

.success-inner h1 {
  font-family: var(--font-display);
  font-size: 2.8rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 16px;
}

.success-sub {
  font-size: 1rem;
  color: var(--fg-dim);
  line-height: 1.7;
  margin-bottom: 32px;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .app-nav {
    padding: 16px 24px;
  }

  .page-header {
    padding: 64px 24px 48px;
  }

  .briefs-list,
  .brief-detail {
    padding: 32px 24px 60px;
  }

  .email-capture {
    flex-direction: column;
  }

  .email-input {
    min-width: unset;
    width: 100%;
  }

  .paywall-inner {
    padding: 32px 24px;
  }

  .paywall-actions {
    flex-direction: column;
  }
}