/* ===== Design tokens (per xvnweb-build-plan.md §10.2) ===== */
:root {
  --bg-void:        #0A0E1A;
  --bg-deep:        #0F1524;
  --bg-raised:      #161E33;

  --glass-bg:       rgba(255, 255, 255, 0.045);
  --glass-bg-hover: rgba(255, 255, 255, 0.075);
  --glass-border:   rgba(255, 255, 255, 0.10);
  --glass-blur:     16px;
  --glass-shadow:   0 8px 32px rgba(4, 8, 20, 0.55);

  --accent:         #38E0D4;
  --accent-deep:    #6C5CE7;
  --accent-glow:    rgba(56, 224, 212, 0.28);

  --ok:    #34D399;
  --warn:  #FBBF24;
  --error: #F87171;

  --text-hi:  #F2F5FA;
  --text-mid: #A8B3C7;
  --text-low: #6B7793;

  --font-display: 'Space Grotesk', system-ui, sans-serif;
  --font-body:    'Inter', -apple-system, 'Segoe UI', sans-serif;
  --font-mono:    ui-monospace, 'SF Mono', Consolas, monospace;

  --t-xs: .8rem;  --t-sm: 1rem;    --t-base: 1.25rem;
  --t-lg: 1.563rem; --t-xl: 1.953rem; --t-2xl: 2.441rem;
  --t-3xl: 3.052rem; --t-4xl: 3.815rem;

  --s-1:.25rem; --s-2:.5rem; --s-3:.75rem; --s-4:1rem;
  --s-6:1.5rem; --s-8:2rem; --s-12:3rem; --s-16:4rem; --s-24:6rem;

  --r-sm: 6px; --r-md: 12px; --r-lg: 20px; --r-pill: 999px;

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --d-fast: 140ms; --d-base: 240ms; --d-slow: 420ms;
}

/* ===== Reset ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg-void);
  color: var(--text-mid);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }
ul { list-style: none; }
h1, h2, h3, h4 { font-family: var(--font-display); color: var(--text-hi); font-weight: 600; letter-spacing: -0.02em; line-height: 1.15; }
.container { max-width: 1240px; margin: 0 auto; padding: 0 var(--s-6); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
}

/* ===== Ambient background ===== */
.bg-mesh {
  position: fixed; inset: 0; z-index: -1; background: var(--bg-void);
  overflow: hidden;
}
.bg-mesh::before, .bg-mesh::after {
  content: ""; position: absolute; border-radius: 50%; filter: blur(90px); opacity: .35;
  animation: drift 26s var(--ease-out) infinite alternate;
}
.bg-mesh::before {
  width: 60vw; height: 60vw; top: -20vw; left: -10vw;
  background: radial-gradient(circle, var(--accent-deep), transparent 65%);
}
.bg-mesh::after {
  width: 55vw; height: 55vw; bottom: -25vw; right: -15vw;
  background: radial-gradient(circle, var(--accent), transparent 65%);
  animation-delay: -13s;
}
@keyframes drift {
  from { transform: translate(0, 0) scale(1); }
  to   { transform: translate(4vw, 3vw) scale(1.08); }
}

/* ===== Glass ===== */
.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur)) saturate(160%);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(160%);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
  background-image: linear-gradient(180deg, rgba(255,255,255,.06) 0%, transparent 32%);
  border-radius: var(--r-lg);
}
@supports not (backdrop-filter: blur(1px)) {
  .glass { background: rgba(22, 30, 51, 0.92); }
}
@media (max-width: 768px) {
  :root { --glass-blur: 10px; }
}

/* ===== Buttons ===== */
.btn {
  position: relative; display: inline-flex; align-items: center; justify-content: center; gap: var(--s-2);
  padding: 0.9rem 1.6rem; border-radius: var(--r-pill); font-weight: 600; font-size: var(--t-xs);
  transition: transform var(--d-fast) var(--ease-out), box-shadow var(--d-fast) var(--ease-out), background var(--d-fast);
  white-space: nowrap; overflow: hidden;
}
.btn:active { transform: scale(0.97); }
.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-deep));
  color: #04121a;
  box-shadow: 0 0 0 1px rgba(255,255,255,.08) inset, 0 8px 24px var(--accent-glow);
}
.btn-primary:hover { box-shadow: 0 0 0 1px rgba(255,255,255,.14) inset, 0 10px 30px var(--accent-glow); }
.btn-primary::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(140px circle at var(--mx, 50%) var(--my, 50%), rgba(255,255,255,.35), transparent 60%);
  opacity: 0; transition: opacity var(--d-fast);
}
.btn-primary:hover::after { opacity: 1; }
.btn-ghost {
  background: var(--glass-bg); border: 1px solid var(--glass-border); color: var(--text-hi);
}
.btn-ghost:hover { background: var(--glass-bg-hover); }
.btn-sm { padding: 0.6rem 1.1rem; font-size: 0.8rem; }
.btn-block { width: 100%; }
.btn[disabled] { opacity: .5; cursor: not-allowed; }

/* ===== Nav ===== */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  padding: var(--s-6) 0;
  transition: padding var(--d-base) var(--ease-out), background var(--d-base), backdrop-filter var(--d-base), border-color var(--d-base);
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  padding: var(--s-3) 0;
  background: rgba(10, 14, 26, 0.72);
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  border-bottom-color: var(--glass-border);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; gap: var(--s-6); }
.brand { display: flex; align-items: center; gap: var(--s-2); font-family: var(--font-display); font-weight: 700; font-size: var(--t-base); color: var(--text-hi); }
.brand-mark { width: 30px; height: 30px; }
.nav-links { display: flex; align-items: center; gap: var(--s-8); }
.nav-links a { font-size: var(--t-xs); font-weight: 500; color: var(--text-mid); transition: color var(--d-fast); }
.nav-links a:hover { color: var(--text-hi); }
.nav-actions { display: flex; align-items: center; gap: var(--s-3); }
.nav-toggle { display: none; width: 40px; height: 40px; align-items: center; justify-content: center; border-radius: var(--r-md); }
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after {
  content: ""; display: block; width: 20px; height: 2px; background: var(--text-hi); position: relative; transition: transform var(--d-fast), opacity var(--d-fast);
}
.nav-toggle span::before { position: absolute; top: -6px; }
.nav-toggle span::after { position: absolute; top: 6px; }
.nav-toggle.open span { background: transparent; }
.nav-toggle.open span::before { transform: translateY(6px) rotate(45deg); }
.nav-toggle.open span::after { transform: translateY(-6px) rotate(-45deg); }

@media (max-width: 860px) {
  .nav-links { position: fixed; top: 0; right: 0; height: 100vh; width: min(320px, 85vw);
    background: rgba(10,14,26,.97); backdrop-filter: blur(20px); flex-direction: column; justify-content: center;
    align-items: flex-start; padding: var(--s-8); gap: var(--s-6); transform: translateX(100%);
    transition: transform var(--d-base) var(--ease-out); border-left: 1px solid var(--glass-border); }
  .nav-links.open { transform: translateX(0); }
  .nav-links a { font-size: var(--t-lg); }
  .nav-toggle { display: flex; z-index: 101; }
  .nav-actions .btn-ghost { display: none; }
}

/* ===== Hero ===== */
.hero { padding: clamp(7rem, 18vh, 11rem) 0 var(--s-24); position: relative; }
.hero-inner { max-width: 780px; }
.badge {
  display: inline-flex; align-items: center; gap: var(--s-2); padding: var(--s-2) var(--s-4);
  border-radius: var(--r-pill); font-size: var(--t-xs); font-weight: 500; color: var(--accent); margin-bottom: var(--s-6);
}
.badge-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent); animation: pulse 2s ease-in-out infinite; }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: .35; } }
.hero h1 { font-size: clamp(2.4rem, 5.5vw, var(--t-4xl)); margin-bottom: var(--s-6); }
.hero h1 .grad { background: linear-gradient(120deg, var(--accent), var(--accent-deep)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero p.lede { font-size: var(--t-base); color: var(--text-mid); max-width: 620px; margin-bottom: var(--s-8); }
.hero-cta { display: flex; gap: var(--s-4); flex-wrap: wrap; margin-bottom: var(--s-12); }

.hero-reveal { opacity: 0; transform: translateY(18px); animation: reveal var(--d-slow) var(--ease-out) forwards; }
.hero-reveal:nth-child(1) { animation-delay: .05s; }
.hero-reveal:nth-child(2) { animation-delay: .15s; }
.hero-reveal:nth-child(3) { animation-delay: .25s; }
.hero-reveal:nth-child(4) { animation-delay: .35s; }
@keyframes reveal { to { opacity: 1; transform: none; } }

/* Trust strip */
.trust {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--s-4);
  padding: var(--s-6); border-radius: var(--r-lg);
}
.trust-item { display: flex; align-items: flex-start; gap: var(--s-3); padding: var(--s-2); }
.trust-item svg { width: 20px; height: 20px; stroke: var(--accent); fill: none; stroke-width: 1.6; flex-shrink: 0; margin-top: 2px; }
.trust-item span { font-size: var(--t-xs); color: var(--text-mid); line-height: 1.4; }
@media (max-width: 900px) { .trust { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 520px) { .trust { grid-template-columns: 1fr; } }

/* ===== Sections ===== */
.section { padding: var(--s-24) 0; }
.section-head { max-width: 640px; margin: 0 auto var(--s-12); text-align: center; }
.eyebrow { display: block; font-size: var(--t-xs); font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: var(--accent); margin-bottom: var(--s-3); }
.section-head h2 { font-size: clamp(1.8rem, 3.5vw, var(--t-3xl)); margin-bottom: var(--s-4); }
.section-head p { color: var(--text-mid); }

/* ===== Services ===== */
.services-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--s-6); }
.service-card { padding: var(--s-8); display: flex; flex-direction: column; gap: var(--s-4); transition: background var(--d-base), border-color var(--d-base), transform var(--d-base) var(--ease-out); }
.service-card:hover { background: var(--glass-bg-hover); border-color: rgba(255,255,255,.18); }
.service-icon { width: 48px; height: 48px; border-radius: var(--r-md); display: flex; align-items: center; justify-content: center; background: linear-gradient(135deg, rgba(56,224,212,.15), rgba(108,92,231,.15)); border: 1px solid var(--glass-border); }
.service-icon svg { width: 22px; height: 22px; stroke: var(--accent); fill: none; stroke-width: 1.6; }
.service-card h3 { font-size: var(--t-lg); }
.service-card .tagline { color: var(--text-mid); font-size: var(--t-sm); }
.service-price { font-family: var(--font-display); color: var(--text-hi); font-size: var(--t-sm); font-weight: 600; }
.service-features { display: flex; flex-direction: column; gap: var(--s-2); margin: var(--s-2) 0; }
.service-features li { display: flex; gap: var(--s-2); font-size: var(--t-xs); color: var(--text-mid); align-items: flex-start; }
.service-features li::before { content: "✓"; color: var(--ok); flex-shrink: 0; }
.service-card .btn { margin-top: auto; align-self: flex-start; }

@media (max-width: 980px) { .services-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .services-grid { grid-template-columns: 1fr; } }

/* ===== Pricing / configurator ===== */
.cycle-toggle {
  display: inline-flex; align-items: center; gap: var(--s-1); padding: var(--s-1);
  border-radius: var(--r-pill); margin: 0 auto var(--s-12); position: relative;
}
.cycle-toggle-wrap { display: flex; justify-content: center; }
.cycle-btn { padding: var(--s-2) var(--s-6); border-radius: var(--r-pill); font-size: var(--t-xs); font-weight: 600; color: var(--text-mid); position: relative; z-index: 1; transition: color var(--d-fast); }
.cycle-btn.active { color: #04121a; }
.cycle-thumb { position: absolute; top: 4px; bottom: 4px; left: 4px; width: calc(50% - 4px); border-radius: var(--r-pill); background: linear-gradient(135deg, var(--accent), var(--accent-deep)); transition: transform var(--d-base) var(--ease-spring); z-index: 0; }
.cycle-toggle[data-cycle="annual"] .cycle-thumb { transform: translateX(100%); }
.save-pill { display: inline-flex; align-items: center; margin-left: var(--s-3); font-size: var(--t-xs); color: var(--ok); font-weight: 600; }

.tier-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--s-6); align-items: stretch; }
.tier-card {
  padding: var(--s-8); display: flex; flex-direction: column; gap: var(--s-4); position: relative;
  transition: transform var(--d-base) var(--ease-spring), border-color var(--d-base), background var(--d-base);
}
.tier-card.featured { border-color: rgba(56,224,212,.35); background: var(--glass-bg-hover); }
.tier-card.selected { transform: translateY(-4px); border-color: var(--accent); box-shadow: var(--glass-shadow), 0 0 0 1px var(--accent-glow); }
.tier-badge { position: absolute; top: -14px; left: var(--s-8); background: linear-gradient(135deg, var(--accent), var(--accent-deep)); color: #04121a; font-size: var(--t-xs); font-weight: 700; padding: .3rem .9rem; border-radius: var(--r-pill); }
.tier-name { font-size: var(--t-xl); }
.tier-blurb { font-size: var(--t-xs); color: var(--text-low); margin-top: calc(-1 * var(--s-2)); }
.tier-price-row { display: flex; align-items: baseline; gap: var(--s-1); margin: var(--s-2) 0; }
.tier-price { font-family: var(--font-display); font-size: var(--t-2xl); color: var(--text-hi); font-variant-numeric: tabular-nums; }
.tier-price-cycle { font-size: var(--t-xs); color: var(--text-low); }
.tier-annual-note { font-size: var(--t-xs); color: var(--text-low); min-height: 1.2em; }
.tier-features { display: flex; flex-direction: column; gap: var(--s-2); flex: 1; }
.tier-features li { display: flex; gap: var(--s-2); font-size: var(--t-xs); color: var(--text-mid); align-items: flex-start; }
.tier-features li::before { content: "✓"; color: var(--ok); flex-shrink: 0; }

@media (max-width: 980px) { .tier-grid { grid-template-columns: 1fr; } .tier-badge { left: 50%; transform: translateX(-50%); } }

/* Add-ons panel */
.addons-panel { margin-top: var(--s-8); padding: var(--s-8); display: none; }
.addons-panel.open { display: block; animation: reveal var(--d-base) var(--ease-out); }
.addons-panel-head { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: var(--s-6); flex-wrap: wrap; gap: var(--s-2); }
.addons-panel-head h4 { font-size: var(--t-base); }
.addons-panel-head span { font-size: var(--t-xs); color: var(--text-low); }
.addons-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--s-3); margin-bottom: var(--s-6); }
.addon-row { display: flex; align-items: center; justify-content: space-between; gap: var(--s-3); padding: var(--s-3) var(--s-4); border-radius: var(--r-md); background: rgba(255,255,255,.03); border: 1px solid transparent; transition: border-color var(--d-fast), background var(--d-fast); cursor: pointer; }
.addon-row:hover { border-color: var(--glass-border); }
.addon-row.checked { border-color: var(--accent); background: rgba(56,224,212,.06); }
.addon-label { display: flex; align-items: center; gap: var(--s-3); font-size: var(--t-xs); color: var(--text-hi); }
.addon-check { width: 18px; height: 18px; border-radius: 5px; border: 1.5px solid var(--glass-border); flex-shrink: 0; display: flex; align-items: center; justify-content: center; transition: border-color var(--d-fast), background var(--d-fast); }
.addon-row.checked .addon-check { background: var(--accent); border-color: var(--accent); }
.addon-check svg { width: 11px; height: 11px; stroke: #04121a; stroke-width: 3; opacity: 0; transition: opacity var(--d-fast); }
.addon-row.checked .addon-check svg { opacity: 1; }
.addon-price { font-size: var(--t-xs); color: var(--text-mid); white-space: nowrap; }
.addon-qty { display: flex; align-items: center; gap: var(--s-2); margin-left: var(--s-2); }
.addon-qty button { width: 22px; height: 22px; border-radius: 6px; background: rgba(255,255,255,.06); font-size: 1rem; line-height: 1; }
.addon-qty span { font-size: var(--t-xs); min-width: 1.2em; text-align: center; }
@media (max-width: 700px) { .addons-list { grid-template-columns: 1fr; } }

.summary-bar {
  display: flex; align-items: center; justify-content: space-between; gap: var(--s-4); flex-wrap: wrap;
  padding: var(--s-4) var(--s-6); border-radius: var(--r-lg); background: rgba(255,255,255,.04);
}
.summary-text { font-size: var(--t-xs); color: var(--text-mid); }
.summary-text strong { color: var(--text-hi); font-variant-numeric: tabular-nums; }
.pricing-footnote { text-align: center; margin-top: var(--s-12); font-size: var(--t-xs); color: var(--text-low); }
.pricing-footnote a { color: var(--accent); font-weight: 600; }

/* Sticky mobile summary */
.sticky-summary {
  position: fixed; left: var(--s-4); right: var(--s-4); bottom: var(--s-4); z-index: 90;
  display: none; align-items: center; justify-content: space-between; gap: var(--s-3);
  padding: var(--s-4); border-radius: var(--r-lg);
  transform: translateY(140%); transition: transform var(--d-base) var(--ease-spring);
}
.sticky-summary.visible { display: flex; transform: translateY(0); }
.sticky-summary .summary-text { flex: 1; min-width: 0; }
.sticky-summary .summary-label { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
@media (min-width: 769px) { .sticky-summary { display: none !important; } }

/* ===== Bundles ===== */
.bundles-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--s-6); }
.bundle-card { padding: var(--s-6); display: flex; flex-direction: column; gap: var(--s-3); }
.bundle-card h3 { font-size: var(--t-base); }
.bundle-contents { font-size: var(--t-xs); color: var(--text-mid); min-height: 3.2em; }
.bundle-price-row { display: flex; align-items: baseline; gap: var(--s-2); margin-top: var(--s-2); }
.bundle-list-price { font-size: var(--t-xs); color: var(--text-low); text-decoration: line-through; }
.bundle-price { font-family: var(--font-display); color: var(--text-hi); font-size: var(--t-lg); }
.bundle-save { display: inline-block; font-size: var(--t-xs); color: var(--ok); font-weight: 600; }
@media (max-width: 980px) { .bundles-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .bundles-grid { grid-template-columns: 1fr; } }

/* ===== FAQ ===== */
.faq-list { max-width: 760px; margin: 0 auto; display: flex; flex-direction: column; gap: var(--s-3); }
.faq-item { padding: 0 var(--s-6); }
.faq-item summary { list-style: none; padding: var(--s-6) 0; font-family: var(--font-display); color: var(--text-hi); font-size: var(--t-sm); cursor: pointer; display: flex; align-items: center; justify-content: space-between; gap: var(--s-4); }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; font-size: 1.4rem; color: var(--accent); transition: transform var(--d-fast); flex-shrink: 0; }
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item p { padding-bottom: var(--s-6); color: var(--text-mid); font-size: var(--t-sm); max-width: 640px; }

/* ===== Contact / lead ===== */
.contact-panel { max-width: 720px; margin: 0 auto; padding: var(--s-12) var(--s-8); text-align: center; }
.contact-panel h2 { font-size: clamp(1.8rem, 3.5vw, var(--t-3xl)); margin-bottom: var(--s-4); }
.contact-panel > p { margin-bottom: var(--s-8); }
.lead-form { display: grid; grid-template-columns: 1fr 1fr; gap: var(--s-4); text-align: left; }
.lead-form .field-full { grid-column: 1 / -1; }
.field label { display: block; font-size: var(--t-xs); color: var(--text-mid); margin-bottom: var(--s-2); }
.field input, .field textarea {
  width: 100%; padding: .85rem 1rem; border-radius: var(--r-md); background: rgba(255,255,255,.04);
  border: 1px solid var(--glass-border); color: var(--text-hi); font: inherit; font-size: var(--t-xs);
  transition: border-color var(--d-fast), background var(--d-fast);
}
.field input::placeholder, .field textarea::placeholder { color: var(--text-low); }
.field input:focus, .field textarea:focus { outline: none; border-color: var(--accent); background: rgba(255,255,255,.06); }
.field.invalid input { border-color: var(--error); animation: shake .3s; }
.field.valid input { border-color: var(--ok); }
@keyframes shake { 25% { transform: translateX(-4px); } 75% { transform: translateX(4px); } }
.field textarea { resize: vertical; min-height: 90px; }
.lead-form .btn { margin-top: var(--s-2); }
.form-status { grid-column: 1 / -1; font-size: var(--t-xs); min-height: 1.4em; }
.form-status.ok { color: var(--ok); }
.form-status.err { color: var(--error); }
@media (max-width: 640px) { .lead-form { grid-template-columns: 1fr; } .contact-panel { padding: var(--s-8) var(--s-4); } }

/* ===== Footer ===== */
footer { padding: var(--s-12) 0 var(--s-8); border-top: 1px solid var(--glass-border); }
.footer-inner { display: flex; justify-content: space-between; align-items: center; gap: var(--s-4); flex-wrap: wrap; }
.footer-brand { display: flex; align-items: center; gap: var(--s-2); font-family: var(--font-display); font-weight: 700; color: var(--text-hi); }
.footer-brand svg { width: 22px; height: 22px; }
.footer-links { display: flex; gap: var(--s-6); flex-wrap: wrap; }
.footer-links a { font-size: var(--t-xs); color: var(--text-mid); transition: color var(--d-fast); }
.footer-links a:hover { color: var(--text-hi); }
.footer-meta { font-size: var(--t-xs); color: var(--text-low); }