:root {
  --primary: #1E3A8A;
  --accent: #0891B2;
  --bg: #FFFFFF;
  --fg: #0F172A;
  --muted: #475569;
  --border: #E2E8F0;
  --soft: #F8FAFC;
  --radius: 8px;
}
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--bg); color: var(--fg); font-family: 'Inter', system-ui, sans-serif; line-height: 1.6; }
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3 { font-family: 'IBM Plex Serif', Georgia, serif; font-weight: 600; color: var(--fg); }
h1 { font-size: clamp(28px, 4vw, 44px); line-height: 1.15; letter-spacing: -0.01em; margin: 0 0 20px 0; }
h1 em { font-style: italic; color: var(--primary); font-weight: 600; }
h2 { font-size: 28px; margin: 0 0 16px 0; }
h3 { font-size: 18px; margin: 0 0 8px 0; }

.topbar { display: flex; justify-content: space-between; align-items: center; padding: 18px 32px; border-bottom: 1px solid var(--border); }
.brand { display: flex; align-items: center; gap: 10px; font-family: 'IBM Plex Serif', serif; font-weight: 600; font-size: 18px; color: var(--primary); }
.topbar nav a { margin-left: 24px; color: var(--muted); font-size: 14px; }

main { max-width: 760px; margin: 0 auto; padding: 48px 24px 80px 24px; }
main.wide { max-width: 1140px; }

.hero-grid { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr); gap: 56px; align-items: start; padding: 32px 0 56px 0; }
@media (max-width: 880px) { .hero-grid { grid-template-columns: 1fr; gap: 36px; } }
.hero-left { min-width: 0; }
.hero-left .lead strong { color: var(--primary); font-weight: 600; }

.preview-pane { min-width: 0; padding: 24px; background: var(--soft); border: 1px solid var(--border); border-radius: var(--radius); }
.preview-label { font-family: 'IBM Plex Serif', serif; font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); margin: 0 0 16px 0; font-weight: 600; }
.email-list { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 10px; }
.email-card { background: #fff; border: 1px solid var(--border); border-radius: 6px; padding: 14px 16px; cursor: pointer; transition: border-color .15s, transform .15s; }
.email-card:hover { border-color: var(--primary); transform: translateY(-1px); }
.email-meta { display: flex; justify-content: space-between; align-items: center; margin-bottom: 6px; }
.email-date { font-family: 'IBM Plex Serif', serif; font-size: 13px; color: var(--muted); }
.email-kw { font-family: ui-monospace, monospace; font-size: 11px; background: #EFF6FF; color: var(--primary); padding: 2px 8px; border-radius: 10px; border: 1px solid #DBEAFE; }
.email-subject { font-family: 'IBM Plex Serif', serif; font-weight: 600; font-size: 14px; color: var(--fg); margin: 0 0 4px 0; line-height: 1.35; }
.email-snippet { font-size: 13px; color: var(--muted); margin: 0; line-height: 1.45; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.preview-foot { font-size: 12px; color: var(--muted); margin: 14px 0 0 0; text-align: center; font-style: italic; }

/* Modal */
.modal { position: fixed; inset: 0; z-index: 50; display: flex; align-items: center; justify-content: center; padding: 24px; }
.modal[hidden] { display: none; }
.modal-backdrop { position: absolute; inset: 0; background: rgba(15, 23, 42, 0.55); backdrop-filter: blur(2px); }
.modal-inner { position: relative; max-width: 620px; width: 100%; max-height: 86vh; overflow-y: auto; background: #fff; border-radius: 8px; box-shadow: 0 30px 60px -10px rgba(15, 23, 42, 0.25); padding: 36px 32px 32px 32px; }
.modal-close { position: absolute; top: 12px; right: 14px; background: transparent; border: 0; font-size: 28px; line-height: 1; color: var(--muted); cursor: pointer; padding: 4px 10px; }
.modal-close:hover { color: var(--fg); }
.mail-header { padding-bottom: 16px; border-bottom: 1px solid var(--border); margin-bottom: 20px; }
.mail-from { font-size: 13px; color: var(--muted); margin: 0 0 6px 0; }
.mail-subject { font-family: 'IBM Plex Serif', serif; font-size: 20px; font-weight: 600; color: var(--fg); margin: 0; line-height: 1.35; }
.mail-match { padding: 0 0 18px 0; margin-bottom: 18px; border-bottom: 1px solid var(--border); }
.mail-match:last-child { border-bottom: 0; }
.mail-match .tag { display: inline-block; font-family: ui-monospace, monospace; font-size: 11px; background: #EFF6FF; color: var(--primary); padding: 3px 9px; border-radius: 10px; border: 1px solid #DBEAFE; letter-spacing: 0.04em; }
.mail-match h4 { font-family: 'IBM Plex Serif', serif; font-size: 16px; color: var(--fg); margin: 8px 0 8px 0; line-height: 1.4; }
.mail-match p { font-size: 14px; color: #1f2937; margin: 0 0 10px 0; line-height: 1.55; }
.mail-match a { font-size: 13px; color: var(--primary); border-bottom: 1px solid var(--primary); text-decoration: none; }

.hero { padding: 32px 0 56px 0; }
.lead { font-size: 18px; color: var(--muted); max-width: 600px; margin: 0 0 32px 0; }

.subscribe { background: var(--soft); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px; max-width: 520px; }
.subscribe label { display: block; margin-bottom: 16px; }
.subscribe label span { display: block; font-size: 13px; color: var(--muted); margin-bottom: 6px; font-weight: 500; }
.hint-inline { font-weight: 400; color: var(--muted); font-size: 12px; }
.subscribe input { width: 100%; padding: 11px 14px; border: 1px solid var(--border); border-radius: 6px; font-size: 15px; font-family: inherit; background: #fff; color: var(--fg); }
.subscribe input:focus { outline: 2px solid var(--accent); outline-offset: -1px; border-color: var(--accent); }
.subscribe button { width: 100%; padding: 12px 18px; background: var(--primary); color: #fff; border: 0; border-radius: 6px; font-size: 15px; font-weight: 600; cursor: pointer; font-family: inherit; }
.subscribe button:hover { background: #1a3275; }
.subscribe button:disabled { opacity: .5; cursor: wait; }
.hint { font-size: 12px; color: var(--muted); margin: 12px 0 0 0; }
.msg { margin: 12px 0 0 0; padding: 10px 12px; border-radius: 6px; font-size: 14px; }
.msg.ok { background: #ecfdf5; border: 1px solid #6ee7b7; color: #065f46; }
.msg.err { background: #fef2f2; border: 1px solid #fca5a5; color: #991b1b; }

.block { margin: 64px 0 0 0; }
.steps { padding-left: 22px; }
.steps li { margin-bottom: 12px; color: var(--muted); }
.steps li strong { color: var(--fg); }

.tiers { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; }
.tier { background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; }
.tier.featured { border-color: var(--primary); border-width: 2px; }
.price { font-family: 'IBM Plex Serif', serif; font-size: 28px; font-weight: 600; color: var(--primary); margin: 4px 0 16px 0; }
.price span { font-size: 14px; color: var(--muted); font-weight: 400; font-family: 'Inter', sans-serif; }
.tier ul { padding-left: 18px; margin: 0; color: var(--muted); }
.tier ul li { margin-bottom: 6px; font-size: 14px; }
.soon { font-size: 12px; color: var(--muted); margin: 12px 0 0 0; font-style: italic; }

.faq details { border-bottom: 1px solid var(--border); padding: 12px 0; }
.faq summary { cursor: pointer; font-weight: 500; color: var(--fg); }
.faq details p { color: var(--muted); margin: 8px 0 0 0; }

footer { border-top: 1px solid var(--border); padding: 24px; text-align: center; color: var(--muted); font-size: 13px; }

/* alerts page */
.alerts-list { list-style: none; padding: 0; margin: 0; }
.alerts-list li { display: flex; justify-content: space-between; align-items: center; padding: 14px 16px; background: var(--soft); border: 1px solid var(--border); border-radius: 6px; margin-bottom: 8px; }
.alerts-list code { font-family: ui-monospace, monospace; font-size: 14px; color: var(--fg); }
.alerts-list button { background: transparent; color: #b91c1c; border: 1px solid #fca5a5; border-radius: 4px; padding: 4px 10px; cursor: pointer; font-size: 13px; }
.alerts-list button:hover { background: #fef2f2; }

.add-kw { display: flex; gap: 8px; margin-top: 12px; }
.add-kw input { flex: 1; padding: 11px 14px; border: 1px solid var(--border); border-radius: 6px; font-size: 14px; font-family: inherit; background: #fff; color: var(--fg); }
.add-kw input:focus { outline: 2px solid var(--accent); outline-offset: -1px; border-color: var(--accent); }
.add-kw button { padding: 11px 18px; background: var(--primary); color: #fff; border: 0; border-radius: 6px; font-size: 14px; font-weight: 600; cursor: pointer; font-family: inherit; }
.add-kw button:hover { background: #1a3275; }
.hint-empty { color: var(--muted); font-size: 14px; margin-top: 8px; }

.digest-section { margin-top: 56px; }
.digest-head { margin-bottom: 20px; }
.digest-sub { color: var(--muted); font-size: 14px; margin: 4px 0 0 0; }
.digest-list { display: flex; flex-direction: column; gap: 14px; }
.digest-card { padding: 20px 22px; background: var(--soft); border: 1px solid var(--border); border-radius: 6px; }
.digest-meta { display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px; }
.digest-date { font-family: 'IBM Plex Serif', serif; font-size: 13px; color: var(--muted); }
.digest-kw { font-family: ui-monospace, monospace; font-size: 11px; background: #EFF6FF; color: var(--primary); padding: 3px 9px; border-radius: 10px; border: 1px solid #DBEAFE; letter-spacing: 0.04em; }
.digest-title { font-family: 'IBM Plex Serif', serif; font-size: 16px; font-weight: 600; color: var(--fg); margin: 0 0 8px 0; line-height: 1.4; }
.digest-summary { font-size: 14px; color: #1f2937; margin: 0 0 12px 0; line-height: 1.55; }
.digest-link { font-size: 13px; color: var(--primary); border-bottom: 1px solid var(--primary); text-decoration: none; }
.digest-link:hover { color: #1a3275; border-color: #1a3275; }