/* ==========================================================================
   GTag Server — base styles
   ========================================================================== */

:root {
  --color-bg: #0b1220;
  --color-bg-alt: #101a2e;
  --color-surface: #141f38;
  --color-surface-alt: #182541;
  --color-border: #24314f;
  --color-text: #e7ecf7;
  --color-text-muted: #9aa7c2;
  --color-text-faint: #6b7996;
  --color-accent: #4f8cff;
  --color-accent-strong: #3a6fe0;
  --color-accent-soft: rgba(79, 140, 255, 0.12);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.25);
  --max-width: 1160px;
  --font-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-base);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

section {
  padding: 88px 0;
}

h1, h2, h3, h4 {
  line-height: 1.25;
  margin: 0 0 16px;
  font-weight: 650;
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(2.1rem, 4.5vw, 3.4rem); }
h2 { font-size: clamp(1.6rem, 3vw, 2.3rem); }
h3 { font-size: 1.15rem; }

p {
  margin: 0 0 16px;
  color: var(--color-text-muted);
}

.eyebrow {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 14px;
}

.section-head {
  max-width: 640px;
  margin: 0 auto 48px;
  text-align: center;
}

.section-head p {
  margin: 0;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 26px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, background-color 0.15s ease, border-color 0.15s ease;
  white-space: nowrap;
}

.btn:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.btn-primary {
  background-color: var(--color-accent);
  color: #ffffff;
}

.btn-primary:hover {
  background-color: var(--color-accent-strong);
  transform: translateY(-1px);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-text);
  border-color: var(--color-border);
}

.btn-secondary:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.btn-block {
  width: 100%;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background-color: rgba(11, 18, 32, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--color-text);
}

.logo-mark {
  width: 30px;
  height: 30px;
  flex-shrink: 0;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.main-nav a {
  padding: 8px 14px;
  font-size: 0.95rem;
  color: var(--color-text-muted);
  border-radius: var(--radius-sm);
  transition: color 0.15s ease, background-color 0.15s ease;
}

.main-nav a:hover,
.main-nav a:focus-visible {
  color: var(--color-text);
  background-color: var(--color-surface);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 8px 10px;
  cursor: pointer;
}

.nav-toggle span,
.nav-toggle::before,
.nav-toggle::after {
  content: "";
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--color-text);
  margin: 4px 0;
}

/* Hero */
.hero {
  padding: 110px 0 90px;
  text-align: center;
  background:
    radial-gradient(circle at 50% 0%, rgba(79, 140, 255, 0.14), transparent 60%);
}

.hero-inner {
  max-width: 780px;
  margin: 0 auto;
}

.hero p.lead {
  font-size: 1.15rem;
  color: var(--color-text-muted);
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 14px;
  margin-top: 32px;
  flex-wrap: wrap;
}

.hero-diagram {
  margin-top: 64px;
}

.flow-diagram {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  flex-wrap: wrap;
}

.flow-node {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 18px 24px;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text);
  min-width: 160px;
}

.flow-arrow {
  color: var(--color-text-faint);
  font-size: 1.3rem;
}

/* Cards / grids */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
}

.card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 28px;
  height: 100%;
}

.card-icon {
  width: 42px;
  height: 42px;
  margin-bottom: 18px;
  color: var(--color-accent);
}

.card p {
  margin: 0;
  font-size: 0.95rem;
}

.section-alt {
  background-color: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

/* How it works */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  counter-reset: step;
}

.step {
  position: relative;
  padding: 28px 24px 24px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background-color: var(--color-accent-soft);
  color: var(--color-accent);
  font-weight: 700;
  margin-bottom: 16px;
}

.step h3 {
  margin-bottom: 8px;
}

.step p {
  margin: 0;
  font-size: 0.95rem;
}

/* Benefits list */
.benefit-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.benefit {
  display: flex;
  gap: 14px;
}

.benefit-mark {
  flex-shrink: 0;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background-color: var(--color-accent-soft);
  color: var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  margin-top: 2px;
}

.benefit h3 {
  font-size: 1rem;
  margin-bottom: 6px;
}

.benefit p {
  font-size: 0.92rem;
  margin: 0;
}

/* Security section */
.security-layout {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 56px;
  align-items: center;
}

.security-list {
  display: grid;
  gap: 14px;
  margin-top: 8px;
}

.security-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.95rem;
  color: var(--color-text);
}

.security-list li::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-accent);
  flex-shrink: 0;
}

.security-visual {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background-color: var(--color-surface);
  padding: 32px;
}

/* CTA */
.cta {
  text-align: center;
  background: linear-gradient(180deg, var(--color-surface), var(--color-surface-alt));
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.cta-inner {
  max-width: 620px;
  margin: 0 auto;
}

/* Footer */
.site-footer {
  padding: 56px 0 32px;
}

.footer-top {
  display: flex;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--color-border);
}

.footer-brand {
  max-width: 320px;
}

.footer-brand p {
  font-size: 0.92rem;
  margin-top: 12px;
}

.footer-links {
  display: flex;
  gap: 12px;
}

.footer-links a {
  color: var(--color-text-muted);
  font-size: 0.92rem;
  padding: 6px 0;
}

.footer-links a:hover {
  color: var(--color-text);
}

.footer-bottom {
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--color-text-faint);
}

.footer-disclaimer {
  padding-top: 20px;
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--color-text-faint);
  max-width: 820px;
}

/* Inner pages (privacy / contact) */
.page-header {
  padding: 72px 0 40px;
  border-bottom: 1px solid var(--color-border);
}

.page-header .updated {
  color: var(--color-text-faint);
  font-size: 0.9rem;
}

.legal-content h2 {
  margin-top: 40px;
  font-size: 1.3rem;
}

.legal-content h2:first-child {
  margin-top: 0;
}

.legal-content ul {
  list-style: disc;
  padding-left: 22px;
  margin-bottom: 16px;
}

.legal-content li {
  color: var(--color-text-muted);
  margin-bottom: 6px;
}

.legal-content p {
  font-size: 0.98rem;
}

/* Contact page */
.contact-layout {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 56px;
}

.contact-info .info-block {
  margin-bottom: 28px;
}

.contact-info h3 {
  font-size: 0.95rem;
  color: var(--color-text-faint);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 8px;
}

.contact-info a.email-link {
  color: var(--color-accent);
  font-size: 1.05rem;
  font-weight: 600;
}

.obfuscated-email {
  color: var(--color-accent);
  font-weight: 600;
  cursor: pointer;
}

.form-note .obfuscated-email,
.legal-content .obfuscated-email {
  font-weight: 600;
}

.form-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 32px;
}

.form-row {
  margin-bottom: 20px;
}

.form-row label {
  display: block;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-bottom: 8px;
}

.form-row input,
.form-row textarea {
  width: 100%;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: inherit;
  font-size: 0.95rem;
}

.form-row input:focus-visible,
.form-row textarea:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 1px;
}

.form-note {
  font-size: 0.85rem;
  color: var(--color-text-faint);
  margin-top: 14px;
}

.form-status {
  display: none;
  margin-top: 16px;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  border: 1px solid transparent;
}

.form-status.is-visible {
  display: block;
}

.form-status.is-sending {
  background-color: var(--color-accent-soft);
  border-color: var(--color-border);
  color: var(--color-text-muted);
}

.form-status.is-success {
  background-color: rgba(52, 199, 89, 0.12);
  border-color: rgba(52, 199, 89, 0.35);
  color: #6fd18a;
}

.form-status.is-error {
  background-color: rgba(255, 90, 90, 0.1);
  border-color: rgba(255, 90, 90, 0.35);
  color: #ff8f8f;
}

.field-error {
  display: none;
  font-size: 0.82rem;
  color: #ff8f8f;
  margin-top: 6px;
}

.form-row.has-error input,
.form-row.has-error textarea {
  border-color: #ff8f8f;
}

.form-row.has-error .field-error {
  display: block;
}

.form-row-checkbox {
  margin-bottom: 20px;
}

.checkbox-label {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  margin-top: 2px;
  accent-color: var(--color-accent);
}

.checkbox-label span {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  line-height: 1.5;
}

.checkbox-label a {
  color: var(--color-accent);
}

.form-row-checkbox.has-error .checkbox-label span {
  color: #ff8f8f;
}

/* Utility */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
}

/* Responsive */
@media (max-width: 1024px) {
  .security-layout,
  .contact-layout {
    grid-template-columns: 1fr;
  }

  .steps {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  section {
    padding: 64px 0;
  }

  .nav-toggle {
    display: block;
  }

  .main-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    background-color: var(--color-bg-alt);
    border-bottom: 1px solid var(--color-border);
    padding: 12px;
    display: none;
  }

  .main-nav.is-open {
    display: flex;
  }

  .main-nav a {
    padding: 12px 14px;
  }

  .header-actions .btn span.btn-label-full {
    display: none;
  }

  .steps {
    grid-template-columns: 1fr;
  }

  .flow-diagram {
    flex-direction: column;
  }

  .flow-arrow {
    transform: rotate(90deg);
  }

  .footer-bottom {
    flex-direction: column;
  }
}

@media (max-width: 390px) {
  h1 {
    font-size: 2rem;
  }

  .hero {
    padding: 88px 0 64px;
  }

  .card,
  .step,
  .form-card {
    padding: 20px;
  }
}