/* spamvex — premium marketing site
 * design tokens, layout primitives, motion
 */

:root {
  /* palette — light primary, dark accents for contrast */
  --ink: #0A0A0A;           /* primary text */
  --ink-2: #1F1F1F;         /* button, dark backgrounds */
  --mute: #525252;          /* secondary text */
  --mute-2: #A3A3A3;        /* tertiary text */
  --line: #E7E5E4;          /* dividers */
  --tint: #FAFAF9;          /* subtle surface */
  --paper: #FFFFFF;         /* background */
  --accent: #E9E5DD;        /* warm off-white accent tint */

  /* sparingly used gradient for one premium moment in hero */
  --grad: linear-gradient(135deg, #111111 0%, #2A2A2A 50%, #111111 100%);

  /* type scale — tight display, generous body */
  --f-display: 'Fraunces', 'Playfair Display', Georgia, serif;
  --f-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --f-mono: 'JetBrains Mono', 'SF Mono', ui-monospace, Menlo, monospace;

  /* rhythm */
  --pad-x: clamp(1.25rem, 4vw, 2rem);
  --section-y: clamp(4rem, 10vw, 8rem);
  --radius: 6px;
  --maxw: 1200px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body {
  font-family: var(--f-sans);
  font-size: 17px;
  line-height: 1.55;
  color: var(--ink);
  background: var(--paper);
  font-feature-settings: 'ss01', 'cv11';
}

a { color: inherit; text-decoration: none; }
a:hover { opacity: 0.7; }

/* ------- layout ------- */
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 var(--pad-x); }
.section { padding: var(--section-y) 0; }
.eyebrow {
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--mute);
  margin-bottom: 1.25rem;
}

/* ------- nav ------- */
.nav {
  position: sticky; top: 0; z-index: 40;
  backdrop-filter: saturate(180%) blur(16px);
  -webkit-backdrop-filter: saturate(180%) blur(16px);
  background: rgba(255,255,255,0.72);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
  max-width: var(--maxw); margin: 0 auto; padding: 0 var(--pad-x);
}
.brand {
  font-family: var(--f-display);
  font-weight: 500;
  font-size: 22px;
  letter-spacing: -0.015em;
}
.brand em { font-style: italic; color: var(--mute); font-weight: 400; }
.nav-links { display: flex; align-items: center; gap: 2rem; }
.nav-links a { font-size: 15px; color: var(--mute); }
.nav-links a:hover { color: var(--ink); opacity: 1; }

/* ------- buttons ------- */
.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.7rem 1.25rem;
  font-size: 15px; font-weight: 500;
  border-radius: var(--radius);
  border: 1px solid transparent;
  transition: transform 120ms ease, background-color 200ms ease, border-color 200ms ease;
  cursor: pointer;
  white-space: nowrap;
}
.btn-primary {
  background: var(--ink); color: #fff;
}
.btn-primary:hover { background: #2a2a2a; opacity: 1; transform: translateY(-1px); }
.btn-ghost {
  background: transparent; color: var(--ink);
  border-color: var(--line);
}
.btn-ghost:hover { border-color: var(--ink); opacity: 1; }
.btn-link {
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--ink);
  font-weight: 500;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}
.btn-lg { padding: 0.95rem 1.75rem; font-size: 16px; }

/* ------- hero ------- */
.hero {
  padding: clamp(5rem, 12vw, 9rem) 0 clamp(4rem, 10vw, 7rem);
  text-align: center;
}
.hero h1 {
  font-family: var(--f-display);
  font-weight: 500;
  font-size: clamp(2.75rem, 6.5vw, 5.25rem);
  line-height: 1.02;
  letter-spacing: -0.035em;
  max-width: 14ch;
  margin: 0 auto 1.5rem;
}
.hero h1 em {
  font-style: italic;
  color: var(--mute);
}
.hero p.lede {
  font-size: clamp(1.05rem, 1.6vw, 1.25rem);
  color: var(--mute);
  max-width: 48ch;
  margin: 0 auto 2.5rem;
  line-height: 1.5;
}
.hero-actions { display: flex; gap: 0.75rem; justify-content: center; flex-wrap: wrap; }
.hero-meta {
  margin-top: 3rem;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--mute-2);
}

/* decorative horizontal rule with a bullet */
.rule {
  display: flex; align-items: center; gap: 1rem;
  max-width: 720px; margin: 0 auto;
  color: var(--mute-2);
}
.rule::before, .rule::after {
  content: ''; flex: 1 1 auto; height: 1px; background: var(--line);
}

/* ------- features ------- */
.features {
  border-top: 1px solid var(--line);
  background: var(--tint);
}
.f-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.f-item {
  background: var(--paper);
  padding: 2.5rem 2rem;
}
.f-item h3 {
  font-family: var(--f-display);
  font-weight: 500;
  font-size: 1.5rem;
  letter-spacing: -0.015em;
  line-height: 1.15;
  margin-bottom: 0.75rem;
}
.f-item p {
  color: var(--mute);
  font-size: 15.5px;
}
.f-num {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--mute-2);
  margin-bottom: 1.25rem;
}

/* ------- section headings ------- */
.section h2 {
  font-family: var(--f-display);
  font-weight: 500;
  font-size: clamp(2rem, 4vw, 3.25rem);
  line-height: 1.05;
  letter-spacing: -0.025em;
  max-width: 18ch;
  margin-bottom: 1rem;
}
.section p.section-lede {
  color: var(--mute);
  font-size: 1.125rem;
  max-width: 52ch;
  margin-bottom: 3rem;
}

/* ------- pricing ------- */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
  margin-top: 2.5rem;
}
.plan {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 2rem;
  background: var(--paper);
  display: flex; flex-direction: column;
  transition: transform 200ms ease, box-shadow 200ms ease;
}
.plan.featured {
  background: var(--ink);
  color: #fff;
  border-color: var(--ink);
}
.plan.featured .plan-price small,
.plan.featured .plan-list li,
.plan.featured .plan-tag { color: rgba(255,255,255,0.72); }
.plan:hover { transform: translateY(-2px); box-shadow: 0 12px 40px -20px rgba(0,0,0,0.15); }
.plan-tag {
  font-family: var(--f-mono);
  font-size: 11px; letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--mute);
  margin-bottom: 1rem;
}
.plan h3 {
  font-family: var(--f-display);
  font-weight: 500;
  font-size: 1.75rem;
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
}
.plan-price {
  font-family: var(--f-display);
  font-size: 2.75rem;
  font-weight: 500;
  letter-spacing: -0.03em;
  margin-bottom: 0.25rem;
}
.plan-price small {
  font-family: var(--f-sans);
  font-size: 15px;
  color: var(--mute);
  font-weight: 400;
  margin-left: 0.25rem;
}
.plan-sub { font-size: 14px; color: var(--mute); margin-bottom: 1.75rem; }
.plan.featured .plan-sub { color: rgba(255,255,255,0.65); }
.plan-list {
  list-style: none; margin-bottom: 2rem;
  font-size: 15px; color: var(--mute);
}
.plan-list li {
  padding: 0.45rem 0;
  padding-left: 1.25rem;
  position: relative;
}
.plan-list li::before {
  content: '→';
  position: absolute; left: 0;
  font-family: var(--f-mono);
  color: var(--ink);
}
.plan.featured .plan-list li::before { color: #fff; }
.plan .btn { width: 100%; justify-content: center; margin-top: auto; }
.plan.featured .btn-primary { background: #fff; color: var(--ink); }
.plan.featured .btn-primary:hover { background: #f0f0f0; }

/* ------- faq ------- */
.faq {
  border-top: 1px solid var(--line);
  background: var(--tint);
}
.faq-list {
  max-width: 780px; margin: 0 auto;
}
details.qa {
  border-top: 1px solid var(--line);
  padding: 1.5rem 0;
}
details.qa:last-child { border-bottom: 1px solid var(--line); }
details.qa summary {
  cursor: pointer;
  list-style: none;
  display: flex; justify-content: space-between; align-items: center;
  font-family: var(--f-display);
  font-weight: 500;
  font-size: 1.2rem;
  letter-spacing: -0.01em;
}
details.qa summary::-webkit-details-marker { display: none; }
details.qa summary::after {
  content: '+';
  font-family: var(--f-mono);
  color: var(--mute);
  transition: transform 200ms;
}
details.qa[open] summary::after { content: '–'; }
details.qa p {
  color: var(--mute);
  padding-top: 1rem;
  font-size: 16px;
  max-width: 60ch;
}

/* ------- cta band ------- */
.cta-band {
  background: var(--ink);
  color: #fff;
  text-align: center;
}
.cta-band h2 { color: #fff; margin: 0 auto 1rem; }
.cta-band p { color: rgba(255,255,255,0.7); max-width: 42ch; margin: 0 auto 2rem; }

/* ------- footer ------- */
footer.site {
  border-top: 1px solid var(--line);
  padding: 3rem 0 4rem;
  font-size: 14px;
  color: var(--mute);
}
.foot-grid {
  display: grid; gap: 2rem;
  grid-template-columns: 1.5fr repeat(3, 1fr);
}
.foot-grid h4 {
  font-size: 12px; text-transform: uppercase; letter-spacing: 0.15em;
  color: var(--ink); margin-bottom: 1rem;
  font-family: var(--f-mono); font-weight: 500;
}
.foot-grid ul { list-style: none; display: flex; flex-direction: column; gap: 0.5rem; }
.foot-grid a:hover { color: var(--ink); opacity: 1; }
.foot-legal {
  margin-top: 3rem; padding-top: 2rem;
  border-top: 1px solid var(--line);
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 1rem;
  font-size: 13px; color: var(--mute-2);
}

/* ------- forms (signup) ------- */
.form {
  max-width: 440px; margin: 0 auto;
  display: flex; flex-direction: column; gap: 1.25rem;
}
.field { display: flex; flex-direction: column; gap: 0.4rem; }
.field label {
  font-size: 13px; font-weight: 500; color: var(--ink);
  letter-spacing: -0.005em;
}
.field input, .field select {
  font-family: var(--f-sans); font-size: 16px;
  padding: 0.85rem 1rem;
  border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--paper); color: var(--ink);
  transition: border-color 200ms;
}
.field input:focus, .field select:focus {
  outline: none; border-color: var(--ink);
}
.field .hint { font-size: 13px; color: var(--mute); }
.field .hint.err { color: #B91C1C; }
.field .hint.ok  { color: #065F46; }
.input-group {
  display: flex; align-items: stretch;
  border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 200ms;
}
.input-group:focus-within { border-color: var(--ink); }
.input-group input {
  flex: 1 1 auto; border: 0; padding: 0.85rem 1rem;
  font-size: 16px;
}
.input-group input:focus { outline: none; }
.input-group .suffix {
  padding: 0.85rem 1rem;
  background: var(--tint); color: var(--mute);
  font-family: var(--f-mono); font-size: 14px;
  border-left: 1px solid var(--line);
}

/* plan cards as radio */
.plan-picker {
  display: grid; gap: 0.75rem; grid-template-columns: 1fr 1fr;
}
.plan-picker label {
  display: block; padding: 1rem 1.1rem;
  border: 1px solid var(--line); border-radius: var(--radius);
  cursor: pointer; transition: border-color 200ms, background-color 200ms;
}
.plan-picker input { display: none; }
.plan-picker input:checked + label {
  border-color: var(--ink); background: var(--tint);
}
.plan-picker label strong { display: block; font-size: 15px; margin-bottom: 0.2rem; }
.plan-picker label span { font-size: 13px; color: var(--mute); }

/* mini-page layouts (privacy/terms/signup) */
.page-body {
  max-width: 780px; margin: 0 auto;
  padding: 5rem 0 7rem;
}
.page-body h1 {
  font-family: var(--f-display);
  font-weight: 500;
  font-size: clamp(2rem, 4vw, 3rem);
  letter-spacing: -0.025em;
  margin-bottom: 1rem;
}
.page-body h2 {
  font-family: var(--f-display);
  font-weight: 500;
  font-size: 1.5rem;
  margin-top: 2.5rem; margin-bottom: 0.75rem;
  letter-spacing: -0.015em;
}
.page-body p, .page-body li {
  color: var(--mute); font-size: 16px; line-height: 1.65;
  margin-bottom: 1rem;
}
.page-body ul { padding-left: 1.25rem; margin-bottom: 1rem; }

/* responsive */
@media (max-width: 720px) {
  .nav-links a:not(.btn) { display: none; }
  .foot-grid { grid-template-columns: 1fr 1fr; }
  .plan-picker { grid-template-columns: 1fr; }
}

/* animation niceties */
.fade-in {
  opacity: 0; transform: translateY(8px);
  animation: fi 900ms cubic-bezier(.2,.7,.2,1) forwards;
}
.fade-in.d1 { animation-delay: 100ms; }
.fade-in.d2 { animation-delay: 200ms; }
.fade-in.d3 { animation-delay: 300ms; }
@keyframes fi { to { opacity: 1; transform: none; } }