/* Email Tracker Marketing Site
   English-only static front-end + PHP contact form.
   Brand inspired by Gmail/Google colors without using official Google assets.
*/

:root {
  --blue: #4285f4;
  --red: #ea4335;
  --yellow: #fbbc05;
  --green: #34a853;
  --ink: #202124;
  --muted: #5f6368;
  --soft: #f8fafc;
  --line: #dadce0;
  --card: #ffffff;
  --shadow: 0 24px 60px rgba(32, 33, 36, 0.10);
  --radius: 24px;
  --max: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  color: var(--ink);
  background: linear-gradient(180deg, #ffffff 0%, #f6f9ff 46%, #ffffff 100%);
  line-height: 1.6;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(circle at 5% 25%, rgba(66, 133, 244, 0.12), transparent 28%),
    radial-gradient(circle at 96% 8%, rgba(52, 168, 83, 0.16), transparent 22%),
    radial-gradient(circle at 92% 92%, rgba(251, 188, 5, 0.18), transparent 24%),
    radial-gradient(circle at 50% 0%, rgba(234, 67, 53, 0.05), transparent 38%);
}

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

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

.container {
  width: min(var(--max), calc(100% - 40px));
  margin: 0 auto;
}

.top-strip {
  height: 8px;
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1fr;
}

.top-strip span:nth-child(1) { background: var(--blue); }
.top-strip span:nth-child(2) { background: var(--red); }
.top-strip span:nth-child(3) { background: var(--yellow); }
.top-strip span:nth-child(4) { background: var(--green); }

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  backdrop-filter: blur(18px);
  background: rgba(255, 255, 255, 0.86);
  border-bottom: 1px solid rgba(218, 220, 224, 0.72);
}

.nav {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  font-weight: 850;
  font-size: 1.25rem;
  letter-spacing: -0.03em;
}

.brand img {
  width: 46px;
  height: 46px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
  color: var(--muted);
  font-weight: 650;
  font-size: 0.96rem;
}

.nav-links a {
  transition: color .2s ease;
}

.nav-links a:hover {
  color: var(--blue);
}

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

.mobile-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 14px;
  cursor: pointer;
}

.mobile-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 4px auto;
  background: var(--ink);
  border-radius: 99px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 20px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 800;
  cursor: pointer;
  transition: transform .18s ease, box-shadow .18s ease, background .18s ease;
  white-space: nowrap;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--blue), #1a73e8);
  box-shadow: 0 12px 28px rgba(66, 133, 244, .26);
}

.btn-primary:hover {
  box-shadow: 0 18px 34px rgba(66, 133, 244, .34);
}

.btn-secondary {
  color: var(--ink);
  background: #fff;
  border-color: var(--line);
}

.btn-ghost {
  background: transparent;
  color: var(--muted);
  border-color: rgba(218,220,224,.85);
}

.hero {
  padding: 72px 0 56px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 450px) minmax(0, 1fr);
  gap: 64px;
  align-items: center;
  justify-content: space-between;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
  color: var(--blue);
  background: rgba(66,133,244,.10);
  border: 1px solid rgba(66,133,244,.18);
  padding: 7px 13px;
  border-radius: 999px;
  font-weight: 850;
  font-size: .84rem;
}

.eyebrow .dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 6px rgba(52,168,83,.14);
}

h1, h2, h3 {
  margin: 0;
  line-height: 1.08;
  letter-spacing: -0.055em;
}

h1 {
  font-size: clamp(1.9rem, 3.35vw, 3rem);
  line-height: 1.04;
  max-width: 410px;
}

h2 {
  font-size: clamp(2rem, 4vw, 3.2rem);
}

h3 {
  font-size: 1.2rem;
}

.lead {
  color: var(--muted);
  font-size: clamp(.92rem, .95vw, .98rem);
  line-height: 1.72;
  max-width: 410px;
  margin: 14px 0 22px;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 28px;
}

.install-actions {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  align-items: stretch;
  max-width: 352px;
}

.install-actions .browser-btn {
  min-height: 38px;
  padding: 0 16px 0 14px;
  font-size: .9rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  border-width: 1px;
  backdrop-filter: blur(10px);
  box-shadow: 0 12px 24px rgba(32, 33, 36, 0.10);
  gap: 10px;
  width: 100%;
  min-width: 0;
  justify-content: flex-start;
}

.install-actions .browser-btn:hover {
  box-shadow: 0 16px 30px rgba(32, 33, 36, 0.14);
}

.browser-icon {
  width: 26px;
  height: 26px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 26px;
  position: relative;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 6px 14px rgba(32, 33, 36, 0.10);
}

.browser-icon img {
  width: 16px;
  height: 16px;
  display: block;
  object-fit: contain;
}

.browser-icon svg {
  width: 16px;
  height: 16px;
  display: block;
}

.browser-icon::before {
  content: "";
  position: absolute;
  left: -8px;
  top: 3px;
  bottom: 3px;
  width: 4px;
  border-radius: 999px;
}

.browser-btn-chrome {
  color: #174ea6;
  border-color: rgba(66, 133, 244, 0.28);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(233, 243, 255, 0.96)),
    linear-gradient(135deg, rgba(66, 133, 244, 0.30), rgba(52, 168, 83, 0.16));
}

.browser-btn-chrome .browser-icon::before {
  background: linear-gradient(180deg, #4285f4, #34a853);
}

.browser-btn-brave {
  color: #bf431f;
  border-color: rgba(251, 84, 43, 0.28);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(255, 241, 236, 0.96)),
    linear-gradient(135deg, rgba(251, 84, 43, 0.26), rgba(255, 120, 63, 0.14));
}

.browser-btn-brave .browser-icon::before {
  background: linear-gradient(180deg, #fb542b, #ff8a3d);
}

.browser-btn-edge {
  color: #0b6f95;
  border-color: rgba(15, 157, 206, 0.28);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(232, 247, 251, 0.96)),
    linear-gradient(135deg, rgba(15, 157, 206, 0.28), rgba(52, 168, 83, 0.14));
}

.browser-btn-edge .browser-icon::before {
  background: linear-gradient(180deg, #0ea5e9, #22c55e);
}

.browser-btn-firefox {
  color: #b63ef0;
  border-color: rgba(180, 73, 255, 0.34);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.99), rgba(255, 241, 252, 0.97)),
    linear-gradient(135deg, rgba(255, 123, 0, 0.28), rgba(181, 73, 255, 0.22));
}

.browser-btn-firefox .browser-icon::before {
  background: linear-gradient(180deg, #ff6a00, #b449ff);
}

.hero-points {
  display: grid;
  gap: 10px;
  max-width: 420px;
}

.point {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  color: #3c4043;
  font-weight: 650;
  font-size: .95rem;
}

.check {
  flex: 0 0 auto;
  width: 22px;
  height: 22px;
  border-radius: 999px;
  background: rgba(52,168,83,.13);
  color: var(--green);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
}

.hero-card {
  position: relative;
  max-width: 700px;
  width: 100%;
  justify-self: end;
}

.hero-grid > div:first-child {
  max-width: 420px;
}

@media (min-width: 1200px) {
  .hero-grid {
    grid-template-columns: minmax(0, 430px) minmax(0, 720px);
    gap: 72px;
  }

  h1 {
    font-size: 2.95rem;
    max-width: 410px;
  }

  .lead,
  .hero-points,
  .hero-grid > div:first-child {
    max-width: 410px;
  }
}

.hero-card::before,
.hero-card::after {
  content: "";
  position: absolute;
  z-index: -1;
  width: 230px;
  height: 230px;
  border-radius: 999px;
  filter: blur(10px);
}

.hero-card::before {
  background: rgba(66, 133, 244, .16);
  left: -40px;
  bottom: -30px;
}

.hero-card::after {
  background: rgba(251, 188, 5, .16);
  right: -35px;
  top: -40px;
}

.hero-image {
  border-radius: 30px;
  box-shadow: var(--shadow);
  border: 1px solid rgba(218,220,224,.74);
  background: #fff;
}

.trust-row {
  padding: 22px 0 58px;
}

.trust-card {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 18px 48px rgba(32,33,36,.06);
}

.trust-item {
  background: rgba(255,255,255,.88);
  padding: 24px;
}

.trust-item strong {
  display: block;
  font-size: 1.75rem;
  line-height: 1;
  letter-spacing: -0.045em;
}

.trust-item span {
  display: block;
  margin-top: 8px;
  color: var(--muted);
  font-weight: 650;
}

.section {
  padding: 78px 0;
}

.section-heading {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 24px;
  margin-bottom: 34px;
}

.section-heading p {
  color: var(--muted);
  max-width: 560px;
  margin: 0;
  font-size: 1.05rem;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.feature-card,
.use-card,
.policy-card,
.contact-card,
.faq-item {
  background: rgba(255,255,255,.86);
  border: 1px solid rgba(218,220,224,.82);
  border-radius: var(--radius);
  box-shadow: 0 16px 46px rgba(32,33,36,.06);
}

.feature-card {
  padding: 28px;
}

.icon {
  width: 48px;
  height: 48px;
  border-radius: 16px;
  display: grid;
  place-items: center;
  margin-bottom: 20px;
  font-size: 1.3rem;
  font-weight: 900;
}

.icon.blue { background: rgba(66,133,244,.12); color: var(--blue); }
.icon.green { background: rgba(52,168,83,.13); color: var(--green); }
.icon.red { background: rgba(234,67,53,.12); color: var(--red); }
.icon.yellow { background: rgba(251,188,5,.18); color: #b77900; }

.feature-card p,
.use-card p,
.faq-item p {
  color: var(--muted);
  margin: 12px 0 0;
}

.product-preview {
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 34px;
  align-items: center;
  background:
    linear-gradient(135deg, rgba(66,133,244,.10), transparent),
    linear-gradient(315deg, rgba(52,168,83,.08), transparent),
    rgba(255,255,255,.82);
  border: 1px solid rgba(218,220,224,.82);
  border-radius: 34px;
  padding: 26px;
  box-shadow: var(--shadow);
}

.preview-copy {
  padding: 22px;
}

.preview-copy p {
  color: var(--muted);
  font-size: 1.05rem;
}

.preview-list {
  display: grid;
  gap: 12px;
  margin: 24px 0;
}

.preview-list li {
  list-style: none;
  display: flex;
  gap: 10px;
  color: #3c4043;
  font-weight: 650;
}

.preview-list li::before {
  content: "✓";
  color: var(--green);
  font-weight: 950;
}

.preview-image {
  border-radius: 28px;
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: 0 18px 44px rgba(32,33,36,.08);
}

.use-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.use-card {
  padding: 24px;
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 7px 12px;
  border-radius: 999px;
  font-weight: 850;
  font-size: .82rem;
  margin-bottom: 14px;
}

.badge.blue { background: rgba(66,133,244,.11); color: var(--blue); }
.badge.green { background: rgba(52,168,83,.13); color: var(--green); }
.badge.red { background: rgba(234,67,53,.12); color: var(--red); }
.badge.yellow { background: rgba(251,188,5,.18); color: #946200; }

.faq-list {
  display: grid;
  gap: 14px;
}

.faq-item {
  padding: 0;
  overflow: hidden;
}

.faq-question {
  width: 100%;
  border: 0;
  background: transparent;
  padding: 22px 24px;
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: center;
  color: var(--ink);
  font-weight: 850;
  font-size: 1rem;
  text-align: left;
  cursor: pointer;
}

.faq-answer {
  display: none;
  padding: 0 24px 22px;
}

.faq-item.open .faq-answer {
  display: block;
}

.contact-wrap {
  display: grid;
  grid-template-columns: .9fr 1.1fr;
  gap: 24px;
  align-items: start;
}

.contact-card {
  padding: 30px;
}

.contact-card p {
  color: var(--muted);
}

.contact-list {
  display: grid;
  gap: 14px;
  margin-top: 24px;
}

.contact-line {
  display: flex;
  gap: 12px;
  color: #3c4043;
  font-weight: 650;
}

.form {
  display: grid;
  gap: 14px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

label {
  display: grid;
  gap: 8px;
  color: #3c4043;
  font-weight: 750;
  font-size: .94rem;
}

input,
textarea,
select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #fff;
  color: var(--ink);
  font: inherit;
  padding: 13px 14px;
  outline: none;
  transition: border-color .2s ease, box-shadow .2s ease;
}

textarea {
  min-height: 150px;
  resize: vertical;
}

input:focus,
textarea:focus,
select:focus {
  border-color: rgba(66,133,244,.72);
  box-shadow: 0 0 0 4px rgba(66,133,244,.12);
}

.honeypot {
  position: absolute;
  left: -9999px;
  visibility: hidden;
}

.form-note {
  color: var(--muted);
  font-size: .9rem;
  margin: 0;
}

.form-status {
  min-height: 24px;
  color: var(--muted);
  font-weight: 750;
}

.form-status.success { color: var(--green); }
.form-status.error { color: var(--red); }

.cta {
  padding: 72px 0 92px;
}

.cta-card {
  position: relative;
  overflow: hidden;
  border-radius: 36px;
  padding: 54px;
  color: #fff;
  background:
    radial-gradient(circle at 8% 20%, rgba(255,255,255,.28), transparent 24%),
    linear-gradient(135deg, #1a73e8, #4285f4 50%, #34a853);
  box-shadow: 0 24px 60px rgba(66,133,244,.22);
}

.cta-card::after {
  content: "";
  position: absolute;
  right: -120px;
  bottom: -140px;
  width: 360px;
  height: 360px;
  border-radius: 50%;
  background: rgba(251,188,5,.40);
}

.cta-card p {
  position: relative;
  z-index: 1;
  max-width: 740px;
  font-size: 1.12rem;
  color: rgba(255,255,255,.88);
}

.cta-card .btn {
  position: relative;
  z-index: 1;
  background: #fff;
  color: var(--blue);
  margin-top: 10px;
}

.site-footer {
  padding: 34px 0;
  border-top: 1px solid rgba(218,220,224,.8);
  background: rgba(255,255,255,.75);
}

.footer-grid {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  flex-wrap: wrap;
  color: var(--muted);
}

.footer-links {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  font-weight: 700;
}

.legal-hero {
  padding: 72px 0 26px;
}

.legal-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 28px;
  align-items: start;
  padding-bottom: 84px;
}

.legal-toc {
  position: sticky;
  top: 104px;
  background: rgba(255,255,255,.86);
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 20px;
  box-shadow: 0 14px 40px rgba(32,33,36,.05);
}

.legal-toc a {
  display: block;
  padding: 10px 8px;
  color: var(--muted);
  font-weight: 700;
}

.legal-toc a:hover {
  color: var(--blue);
}

.legal-content {
  display: grid;
  gap: 18px;
}

.policy-card {
  padding: 28px;
}

.policy-card h2 {
  font-size: 1.7rem;
  margin-bottom: 12px;
}

.policy-card p,
.policy-card li {
  color: var(--muted);
}

.policy-card ul {
  margin-bottom: 0;
}

@media (max-width: 980px) {
  .hero-grid,
  .product-preview,
  .contact-wrap,
  .legal-layout {
    grid-template-columns: 1fr;
  }

  .trust-card,
  .features-grid,
  .use-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .legal-toc {
    position: static;
  }
}

@media (max-width: 760px) {
  .container {
    width: min(var(--max), calc(100% - 28px));
  }

  .mobile-toggle {
    display: inline-block;
  }

  .nav-links {
    position: absolute;
    top: 84px;
    left: 14px;
    right: 14px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 18px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 22px;
    box-shadow: var(--shadow);
  }

  .nav-links.show {
    display: flex;
  }

  .nav-actions .btn-secondary {
    display: none;
  }

  .hero {
    padding-top: 54px;
  }

  .install-actions {
    max-width: 100%;
  }

  .section-heading {
    display: grid;
  }

  .trust-card,
  .features-grid,
  .use-grid,
  .form-row {
    grid-template-columns: 1fr;
  }

  .cta-card {
    padding: 34px;
  }
}