:root {
  --bg: #f4fbff;
  --card: #ffffff;
  --card-soft: #edf7ff;
  --primary: #1c9ad6;
  --primary-dark: #0f7db1;
  --text: #1c2838;
  --muted: #607180;
  --border: rgba(21, 79, 112, 0.12);
  --shadow: 0 20px 50px rgba(18, 72, 110, 0.12);
  --success: #1e9a66;
  --warning: #f7b955;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  background: linear-gradient(180deg, #f4fbff 0%, #eef7ff 100%);
  color: var(--text);
}

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

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

button,
input {
  font: inherit;
}

.page-shell {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 0 18px;
  gap: 18px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.35rem;
  letter-spacing: 0.02em;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), #63d5ff);
  color: white;
  font-size: 1rem;
}

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

.main-nav a {
  transition: color 0.2s ease;
}

.main-nav a:hover,
.main-nav a:focus-visible {
  color: var(--primary-dark);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: none;
  border-radius: 14px;
  padding: 0.9rem 1.3rem;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, opacity 0.2s ease;
}

.btn:hover,
.btn:focus-visible {
  transform: translateY(-1px);
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), #5ebef1);
  color: #fff;
  box-shadow: 0 12px 22px rgba(28, 154, 214, 0.25);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  box-shadow: 0 16px 28px rgba(28, 154, 214, 0.28);
}

.btn-secondary,
.btn-ghost {
  background: rgba(28, 154, 214, 0.1);
  color: var(--primary-dark);
}

.btn-full {
  width: 100%;
}

.hero {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  align-items: center;
  gap: 30px;
  padding: 38px 0 28px;
}

.eyebrow {
  margin: 0 0 10px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.76rem;
  color: var(--primary-dark);
  font-weight: 700;
}

.hero h1,
.section-heading h2,
.about-copy h2,
.contact-band h2 {
  margin: 0;
  line-height: 1.1;
  letter-spacing: -0.04em;
}

.hero h1 {
  font-size: clamp(2.5rem, 5vw, 4.2rem);
  max-width: 620px;
}

.lead {
  margin: 18px 0 0;
  max-width: 620px;
  color: var(--muted);
  font-size: 1.08rem;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 24px;
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(120px, 1fr));
  gap: 12px;
  list-style: none;
  padding: 0;
  margin: 30px 0 0;
}

.hero-metrics li {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 18px 16px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid var(--border);
}

.hero-metrics strong {
  font-size: 1.3rem;
}

.hero-metrics span {
  color: var(--muted);
  font-size: 0.8rem;
}

.hero-card {
  padding: 26px 22px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.95), rgba(237, 247, 255, 0.95));
  border: 1px solid var(--border);
  border-radius: 28px;
  box-shadow: var(--shadow);
}

.mini-head {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--muted);
  font-weight: 600;
}

.mini-dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 0 6px rgba(30, 154, 102, 0.12);
}

.mini-panel {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 12px;
  margin: 22px 0;
  padding: 16px 18px;
  border-radius: 16px;
  background: rgba(28, 154, 214, 0.08);
}

.mini-panel small {
  display: block;
  color: var(--muted);
  margin-bottom: 6px;
}

.mini-panel strong {
  font-size: 1.4rem;
}

.price {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--primary-dark);
}

.hero-card ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
  color: var(--muted);
}

.hero-card li {
  position: relative;
  padding-left: 22px;
}

.hero-card li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), #69d3ff);
}

.section {
  padding: 54px 0;
}

.section-heading {
  margin-bottom: 22px;
}

.section-heading h2,
.about-copy h2,
.contact-band h2 {
  font-size: clamp(2rem, 3vw, 2.7rem);
}

.cards-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

.info-card {
  padding: 30px 24px;
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid var(--border);
  box-shadow: 0 12px 30px rgba(17, 75, 109, 0.06);
}

.icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 54px;
  height: 54px;
  margin-bottom: 18px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(28, 154, 214, 0.12), rgba(104, 209, 255, 0.2));
  font-size: 1.8rem;
}

.info-card h3 {
  margin: 0 0 10px;
  font-size: 1.4rem;
}

.info-card p,
.about-copy p,
.feature-item p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

.info-layout {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 24px;
  align-items: center;
}

.about-copy {
  display: grid;
  gap: 14px;
}

.details-panel {
  padding: 26px 22px;
  background: linear-gradient(180deg, #eff9ff, #f8fbff);
  border: 1px solid var(--border);
  border-radius: 28px;
  display: grid;
  gap: 18px;
}

.details-panel div {
  display: grid;
  gap: 7px;
}

.details-panel small {
  color: var(--muted);
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.feature-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

.feature-item {
  padding: 30px 22px;
  border-radius: 22px;
  background: #fff;
  border: 1px solid var(--border);
}

.feature-item span {
  display: inline-block;
  margin-bottom: 10px;
  color: var(--primary-dark);
  font-weight: 700;
  font-size: 0.86rem;
}

.feature-item h3 {
  margin: 0 0 12px;
  font-size: 1.25rem;
}

.contact-band {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 30px 28px;
  border-radius: 26px;
  background: linear-gradient(135deg, rgba(28, 154, 214, 0.12), rgba(85, 209, 255, 0.12));
  border: 1px solid var(--border);
}

.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 22px 0 48px;
  color: var(--muted);
  font-size: 0.94rem;
}

.page-shell.is-hidden {
  display: none;
}

.account-view {
  display: none;
  width: min(1000px, calc(100% - 24px));
  margin: 24px auto 48px;
  padding: 20px 20px 32px;
  border: 1px solid var(--border);
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.92);
  box-shadow: var(--shadow);
}

.account-view.is-visible {
  display: block;
}

.account-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 16px;
}

.account-main {
  display: grid;
  gap: 22px;
}

.account-panel {
  padding: 26px 20px;
  border-radius: 22px;
  background: linear-gradient(135deg, rgba(28, 154, 214, 0.08), rgba(85, 209, 255, 0.12));
  border: 1px solid var(--border);
}

.account-panel h1 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3rem);
}

.account-subtitle {
  margin: 12px 0 0;
  color: var(--muted);
  line-height: 1.6;
}

.account-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.account-card {
  display: grid;
  gap: 8px;
  padding: 22px 20px;
  border-radius: 18px;
  background: #f7fbff;
  border: 1px solid var(--border);
}

.account-card small {
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.09em;
  font-size: 0.72rem;
}

.account-card strong {
  font-size: 1.1rem;
}

.auth-overlay {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 16px;
  background: rgba(12, 33, 48, 0.48);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
}

.auth-overlay.is-open {
  opacity: 1;
  pointer-events: auto;
}

.auth-modal {
  position: relative;
  width: min(440px, 100%);
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 26px;
  box-shadow: 0 28px 60px rgba(18, 39, 59, 0.2);
  padding: 28px 24px 22px;
}

.close-btn {
  position: absolute;
  top: 16px;
  right: 18px;
  width: 32px;
  height: 32px;
  border: none;
  border-radius: 10px;
  background: rgba(28, 154, 214, 0.08);
  color: var(--primary-dark);
  font-size: 1.7rem;
  line-height: 1;
  cursor: pointer;
}

#authTitle {
  margin: 0 0 18px;
  font-size: 1.8rem;
}

.auth-tabs {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  padding: 6px;
  background: var(--bg);
  border-radius: 14px;
  margin-bottom: 18px;
}

.tab {
  border: none;
  background: transparent;
  border-radius: 10px;
  padding: 0.8rem 0.8rem;
  font-weight: 700;
  color: var(--muted);
  cursor: pointer;
}

.tab.is-active {
  background: #fff;
  box-shadow: 0 8px 16px rgba(28, 154, 214, 0.1);
  color: var(--primary-dark);
}

.auth-form {
  display: none;
  gap: 15px;
}

.auth-form.is-visible {
  display: grid;
}

.auth-form label {
  display: grid;
  gap: 8px;
  color: var(--text);
  font-weight: 600;
}

.auth-form input {
  width: 100%;
  padding: 0.9rem 0.95rem;
  border-radius: 12px;
  border: 1px solid rgba(17, 75, 109, 0.14);
  background: #f9fcff;
  color: var(--text);
}

.auth-form input:focus {
  outline: 2px solid rgba(28, 154, 214, 0.22);
  border-color: rgba(28, 154, 214, 0.4);
}

.code-group {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
}

.code-btn {
  min-width: 140px;
}

.form-footer {
  display: flex;
  justify-content: flex-end;
}

.forgot-password-link {
  color: var(--primary-dark);
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
}

.form-message {
  min-height: 22px;
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.form-message.success {
  color: var(--success);
}

.form-message.error {
  color: #d64a4a;
}

@media (max-width: 860px) {
  .topbar,
  .hero,
  .info-layout,
  .contact-band {
    grid-template-columns: 1fr;
    flex-direction: column;
    align-items: flex-start;
  }

  .topbar {
    display: flex;
  }

  .main-nav {
    width: 100%;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
  }

  .cards-grid,
  .feature-list {
    grid-template-columns: 1fr;
  }

  .hero {
    display: grid;
  }

  .contact-band {
    display: flex;
  }
}

@media (max-width: 560px) {
  .page-shell {
    width: min(100% - 20px, 1180px);
  }

  .hero h1 {
    font-size: 2.5rem;
  }

  .hero-metrics {
    grid-template-columns: 1fr;
  }

  .code-group {
    grid-template-columns: 1fr;
  }

  .footer {
    flex-direction: column;
    align-items: flex-start;
  }
}