:root {
  --bg: #0b0f18;
  --panel: #101725;
  --panel-strong: #0f1421;
  --text: #e9edf5;
  --muted: #9aacbf;
  --accent: #65d6ff;
  --accent-strong: #8cffc9;
  --error: #ff8fa3;
  --border: #1d2736;
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.35);
  --radius: 18px;
  --font: "Space Grotesk", "Segoe UI", sans-serif;
}

html {
  scroll-behavior: smooth;
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

body {
  margin: 0;
  font-family: var(--font);
  background: radial-gradient(circle at 20% 20%, rgba(101, 214, 255, 0.1), transparent 30%),
    radial-gradient(circle at 80% 0%, rgba(140, 255, 201, 0.08), transparent 25%),
    var(--bg);
  color: var(--text);
  min-height: 100vh;
}

/* Top Navigation */
.site-nav {
  background: var(--panel-strong);
  border-bottom: 1px solid var(--border);
  padding: 14px 0;
  position: sticky;
  top: 0;
  z-index: 200;
}

.nav-container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 18px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-weight: 700;
  font-size: 18px;
  color: var(--text);
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: 18px;
}

.nav-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 15px;
  transition: color 0.2s;
}

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

/* Hamburger Menu */
.hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  width: 28px;
  height: 24px;
  flex-direction: column;
  justify-content: space-between;
  align-items: stretch;
}

.hamburger span {
  display: block;
  height: 3px;
  background: var(--text);
  border-radius: 2px;
  transition: all 0.3s ease;
}

.hamburger.is-active span:nth-child(1) {
  transform: translateY(10.5px) rotate(45deg);
}

.hamburger.is-active span:nth-child(2) {
  opacity: 0;
}

.hamburger.is-active span:nth-child(3) {
  transform: translateY(-10.5px) rotate(-45deg);
}

@media (max-width: 720px) {
  .hamburger {
    display: flex;
  }

  .nav-links {
    position: fixed;
    top: 57px;
    left: 0;
    right: 0;
    background: var(--panel-strong);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: 18px;
    gap: 14px;
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
  }

  .nav-links.is-open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-links a {
    font-size: 16px;
    padding: 8px 0;
  }
}

.hero {
  padding: 48px 18px 32px;
  position: relative;
  overflow: hidden;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 12% auto auto 60%;
  width: 360px;
  height: 360px;
  background: linear-gradient(135deg, rgba(101, 214, 255, 0.12), rgba(140, 255, 201, 0.08));
  filter: blur(70px);
  pointer-events: none;
}

.hero__content {
  max-width: 880px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.eyebrow {
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 12px;
  color: var(--muted);
  margin: 0 0 10px;
}

h1 {
  font-size: clamp(38px, 5vw, 52px);
  letter-spacing: -0.02em;
  margin: 0 0 18px;
}

h2 {
  font-size: 26px;
  margin: 0 0 6px;
}

.lede {
  color: var(--muted);
  font-size: 18px;
  max-width: 700px;
  margin: 0;
  line-height: 1.6;
}

.layout {
  max-width: 980px;
  margin: 0 auto;
  padding: 0 18px 72px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.tabs {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 10px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px;
  box-shadow: var(--shadow);
}

.tabs__button {
  background: #0b111b;
  border: 1px solid var(--border);
  color: var(--muted);
  border-radius: 12px;
  padding: 12px;
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
  transition: border-color 0.15s ease, color 0.15s ease, transform 0.12s ease;
}

.tabs__button.is-active {
  border-color: rgba(101, 214, 255, 0.6);
  color: var(--text);
  background: linear-gradient(135deg, rgba(101, 214, 255, 0.08), rgba(140, 255, 201, 0.06));
  transform: translateY(-1px);
}

.panel {
  background: linear-gradient(145deg, var(--panel), var(--panel-strong));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 22px 24px;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.panel__header {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: flex-start;
}

.badge {
  background: rgba(101, 214, 255, 0.12);
  color: var(--accent);
  border: 1px solid rgba(101, 214, 255, 0.4);
  border-radius: 999px;
  padding: 6px 12px;
  font-size: 12px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  white-space: nowrap;
}

.desc {
  color: var(--muted);
  margin: 0;
  line-height: 1.5;
}

.form {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  color: var(--muted);
  font-size: 14px;
}

.field input {
  width: 100%;
  background: #0b111b;
  border: 1px solid var(--border);
  border-radius: 12px;
  color: var(--text);
  padding: 12px 12px;
  font-size: 15px;
}

.field select {
  width: 100%;
  background: #0b111b;
  border: 1px solid var(--border);
  border-radius: 12px;
  color: var(--text);
  padding: 12px 12px;
  font-size: 15px;
  appearance: none;
}

.field input:focus,
.field select:focus {
  outline: 2px solid rgba(101, 214, 255, 0.4);
  border-color: rgba(101, 214, 255, 0.8);
}

.primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  color: #0b1019;
  border: none;
  border-radius: 12px;
  padding: 12px 14px;
  font-weight: 700;
  font-size: 15px;
  cursor: pointer;
  transition: transform 0.12s ease, box-shadow 0.12s ease;
  box-shadow: 0 12px 32px rgba(101, 214, 255, 0.25);
}

.primary:hover {
  transform: translateY(-1px);
}

.primary:active {
  transform: translateY(0);
}

.hint {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.error {
  margin: 0;
  min-height: 18px;
  color: var(--error);
  font-weight: 600;
  font-size: 13px;
}

.result {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 14px 16px;
  display: grid;
  gap: 10px;
}

.result__summary {
  color: var(--text);
  font-weight: 600;
}

.result__number {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 26px;
  font-weight: 700;
}

.result__number span {
  display: inline-block;
  padding: 8px 12px;
  border-radius: 12px;
  background: rgba(101, 214, 255, 0.12);
  border: 1px solid rgba(101, 214, 255, 0.4);
  color: var(--accent);
}

.result__text {
  color: var(--muted);
  line-height: 1.55;
}

.result__list {
  display: grid;
  gap: 6px;
  padding: 0;
  margin: 0;
  list-style: none;
}

.result__list strong {
  color: var(--text);
}

.result__cta {
  margin-top: 4px;
}

.result__link {
  color: var(--accent);
  font-weight: 700;
  text-decoration: none;
}

.result__link:hover {
  text-decoration: underline;
}

.grid-2 {
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
}

.grid-3 {
  display: grid;
  gap: 8px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.footer {
  padding: 28px 18px 40px;
  text-align: center;

  /* AdSense Placements */
  .ad-container {
    max-width: 960px;
    margin: 32px auto;
    padding: 0 18px;
    display: flex;
    justify-content: center;
  }

  .ad-header {
    margin-top: 24px;
    margin-bottom: 24px;
  }

  .ad-middle {
    margin-top: 48px;
    margin-bottom: 48px;
    padding: 24px 18px;
    background: linear-gradient(145deg, var(--panel), var(--panel-strong));
    border: 1px solid var(--border);
    border-radius: var(--radius);
  }

  .ad-sidebar {
    margin: 24px auto;
  }

  .ad-container ins {
    display: block;
    min-height: 90px;
  }
  color: var(--muted);
  font-size: 14px;
}

@media (max-width: 720px) {
  .panel__header {
    flex-direction: column;
  }

  .hero {
    padding-top: 62px;
  }
}