:root {
  --bg: #fafbfc; /* light background */
  --bg-secondary: #f5f7fa; /* secondary background */
  --panel: #ffffff; /* surface cards/menus */
  --text: #0f1419; /* primary text */
  --text-secondary: #56606d; /* secondary text */
  --text-tertiary: #8b92a0; /* tertiary text */
  --accent: #0055ff; /* primary accent (modern blue) */
  --accent-secondary: #00b4a6; /* secondary accent (teal) */
  --accent-tertiary: #7c3aed; /* tertiary accent (purple) */
  --success: #10b981; /* success green */
  --warning: #f59e0b; /* warning orange */
  --danger: #ef4444; /* danger red */
  --border: #e3e5e7; /* border color */
  --shadow-sm: 0 1px 2px rgba(15, 20, 25, 0.06);
  --shadow-md: 0 4px 12px rgba(15, 20, 25, 0.08);
  --shadow-lg: 0 12px 32px rgba(15, 20, 25, 0.12);
}

* {
  box-sizing: border-box;
}
html,
body {
  height: 100%;
}
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Oxygen",
    "Ubuntu", "Cantarell", "Fira Sans", "Droid Sans", "Helvetica Neue",
    sans-serif;
  background: linear-gradient(135deg, var(--bg) 0%, var(--bg-secondary) 100%);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.container {
  width: min(1100px, 92%);
  margin-inline: auto;
}

header.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(12px);
  background: rgba(250, 251, 252, 0.85);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}
.navbar {
  display: flex;
  gap: 24px;
  align-items: center;
  padding: 14px 0;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text);
  font-weight: 700;
  font-size: 16px;
  letter-spacing: -0.5px;
}
.brand span {
  background: linear-gradient(
    135deg,
    var(--accent) 0%,
    var(--accent-tertiary) 100%
  );
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.brand:hover span {
  opacity: 0.8;
}

.nav-links {
  margin-left: auto;
  display: flex;
  gap: 16px;
}
.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  padding: 8px 14px;
  border-radius: 8px;
  font-weight: 500;
  font-size: 14px;
  transition: all 0.2s ease;
  position: relative;
}
.nav-links a:hover {
  color: var(--text);
  background: var(--bg-secondary);
}
.nav-links a.active {
  color: var(--accent);
  background: rgba(0, 85, 255, 0.08);
}

.burger {
  display: none;
  margin-left: auto;
  background: none;
  border: 1px solid var(--border);
  color: var(--text);
  padding: 8px 12px;
  border-radius: 8px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
}
.burger:hover {
  background: var(--bg-secondary);
}

@media (max-width: 800px) {
  .nav-links {
    display: none;
    position: absolute;
    right: 4%;
    top: 56px;
    flex-direction: column;
    background: var(--panel);
    border: 1px solid var(--border);
    padding: 12px;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    min-width: 160px;
  }
  .nav-links.open {
    display: flex;
  }
  .burger {
    display: inline-flex;
  }
}

main {
  display: block;
}
.hero {
  padding: 96px 0 48px;
}
.hero h1 {
  font-size: clamp(32px, 5vw, 56px);
  line-height: 1.15;
  margin: 0 0 16px;
  font-weight: 800;
  letter-spacing: -1px;
  color: var(--text);
}
.hero p {
  margin: 0 0 28px;
  color: var(--text-secondary);
  font-size: clamp(16px, 2.2vw, 19px);
  max-width: 620px;
  line-height: 1.7;
}

.cta {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: linear-gradient(135deg, var(--accent) 0%, #0044cc 100%);
  color: #ffffff;
  padding: 12px 24px;
  border-radius: 10px;
  border: none;
  text-decoration: none;
  font-weight: 600;
  font-size: 15px;
  box-shadow: 0 4px 16px rgba(0, 85, 255, 0.3);
  cursor: pointer;
  transition: all 0.2s ease;
}
.button:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 85, 255, 0.4);
}
.button:active {
  transform: translateY(0);
}
.button.secondary {
  background: var(--bg-secondary);
  color: var(--text);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}
.button.secondary:hover {
  background: var(--panel);
  border-color: var(--accent);
  color: var(--accent);
}

.grid {
  display: grid;
  gap: 24px;
  grid-template-columns: repeat(12, 1fr);
}
.card {
  grid-column: span 6;
  background: var(--panel);
  border: 1px solid var(--border);
  padding: 28px;
  border-radius: 16px;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
}
.card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--accent);
  transform: translateY(-4px);
}
.card h3 {
  margin-top: 0;
  margin-bottom: 12px;
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
}
.card p {
  margin: 0;
  color: var(--text-secondary);
  line-height: 1.7;
}
@media (max-width: 900px) {
  .card {
    grid-column: span 12;
  }
}

.kicker {
  background: linear-gradient(
    135deg,
    var(--accent) 0%,
    var(--accent-secondary) 100%
  );
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-transform: uppercase;
  font-size: 13px;
  letter-spacing: 0.12em;
  font-weight: 700;
  margin-bottom: 16px;
}
.section {
  padding: 36px 0;
}

footer.site-footer {
  margin-top: 64px;
  padding: 36px 0 48px;
  color: var(--text-tertiary);
  border-top: 1px solid var(--border);
  background: var(--bg-secondary);
}
footer .links {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}
footer a {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s ease;
}
footer a:hover {
  color: var(--accent);
}

.prose h1 {
  font-size: 36px;
  font-weight: 800;
  margin: 0 0 16px;
  color: var(--text);
}
.prose h2 {
  margin-top: 1.8em;
  margin-bottom: 0.8em;
  font-size: 24px;
  font-weight: 700;
  color: var(--text);
}
.prose h3 {
  margin-top: 1.4em;
  margin-bottom: 0.6em;
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
}
.prose a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
  transition: opacity 0.2s ease;
}
.prose a:hover {
  opacity: 0.8;
  text-decoration: underline;
}
.prose code {
  background: var(--bg-secondary);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: "Monaco", "Courier New", monospace;
  font-size: 13px;
  color: var(--accent);
}
.prose ol,
.prose ul {
  padding-left: 1.5em;
  line-height: 1.8;
}
.prose li {
  margin-bottom: 0.5em;
}

.notice {
  background: linear-gradient(
    135deg,
    rgba(16, 185, 129, 0.08) 0%,
    rgba(0, 180, 166, 0.04) 100%
  );
  border: 1px solid rgba(16, 185, 129, 0.2);
  border-radius: 12px;
  padding: 16px;
  color: var(--text-secondary);
  font-weight: 500;
}
.notice.success {
  background: linear-gradient(
    135deg,
    rgba(16, 185, 129, 0.1) 0%,
    rgba(0, 180, 166, 0.05) 100%
  );
  border-color: rgba(16, 185, 129, 0.3);
  color: var(--success);
}
.notice.error {
  background: linear-gradient(
    135deg,
    rgba(239, 68, 68, 0.08) 0%,
    rgba(248, 113, 113, 0.04) 100%
  );
  border-color: rgba(239, 68, 68, 0.2);
  color: var(--danger);
}
.badge {
  font-size: 11px;
  padding: 4px 10px;
  border-radius: 999px;
  background: linear-gradient(
    135deg,
    rgba(0, 85, 255, 0.1) 0%,
    rgba(124, 58, 237, 0.05) 100%
  );
  border: 1px solid rgba(0, 85, 255, 0.2);
  color: var(--text-secondary);
  font-weight: 600;
}

.table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
}
.table th,
.table td {
  border: 1px solid var(--border);
  padding: 12px;
  text-align: left;
}
.table th {
  background: var(--bg-secondary);
  font-weight: 700;
  color: var(--text);
}
.table tr:hover {
  background: var(--bg-secondary);
}

/* Accessibility: focus styles and skip link */
.button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.skip-link {
  position: absolute;
  left: 8px;
  top: -40px;
  background: var(--panel);
  color: var(--text);
  padding: 10px 14px;
  border-radius: 8px;
  border: 1px solid var(--border);
  transition: top 0.2s ease;
  z-index: 1000;
  font-weight: 600;
  font-size: 13px;
}
.skip-link:focus {
  top: 8px;
  box-shadow: var(--shadow-md);
}

/* Contact Form Improvements */
.contact-form {
  max-width: 600px;
  margin: 0 auto;
  background: var(--panel);
  border: 1px solid var(--border);
  padding: 36px;
  border-radius: 16px;
  box-shadow: var(--shadow-sm);
}

.form-group {
  margin-bottom: 24px;
}

.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--text);
  font-size: 14px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  font-family: inherit;
  font-size: 15px;
  transition: all 0.2s ease;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-tertiary);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0, 85, 255, 0.1);
}

.form-group input.error,
.form-group textarea.error {
  border-color: var(--danger);
  background: rgba(239, 68, 68, 0.02);
}

.form-group input.error:focus,
.form-group textarea.error:focus {
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.error-message {
  display: block;
  color: var(--danger);
  font-size: 13px;
  margin-top: 6px;
  font-weight: 500;
}

.turnstile-group {
  margin: 28px 0;
  display: flex;
  justify-content: center;
}

.form-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 28px;
  flex-wrap: wrap;
}

#submit-btn {
  min-width: 140px;
  transition: all 0.2s ease;
}

#submit-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.form-status {
  font-size: 14px;
  font-weight: 600;
}

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

.form-status.error {
  color: var(--danger);
}

.form-status.loading {
  color: var(--accent);
}