:root {
  color-scheme: light dark;
  --bg: #f5f7fb;
  --panel: #ffffff;
  --text: #162033;
  --muted: #667085;
  --border: #d8dee9;
  --primary: #1769e0;
  --primary-dark: #1155b4;
  --danger: #c73636;
  --danger-dark: #9f2424;
  --shadow: 0 18px 45px rgba(22, 32, 51, 0.12);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: radial-gradient(circle at top left, #dbeafe, transparent 34rem), var(--bg);
  color: var(--text);
}

.auth-screen {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 1rem;
}

.auth-card {
  width: min(100%, 430px);
  padding: 1.5rem;
}

.auth-card h1 {
  font-size: clamp(2rem, 10vw, 3.25rem);
}

.auth-card button {
  width: 100%;
}

.auth-message {
  min-height: 1.5rem;
  margin: 0;
  color: var(--danger);
  font-weight: 700;
}

.hero {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 1rem;
  padding: clamp(2rem, 5vw, 4rem) clamp(1rem, 4vw, 3rem) 1rem;
  max-width: 1180px;
  margin: 0 auto;
}

.eyebrow {
  margin: 0 0 0.35rem;
  color: var(--primary);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.78rem;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  font-size: clamp(2.4rem, 8vw, 5rem);
  line-height: 0.95;
  margin-bottom: 0.75rem;
}

h2 {
  margin-bottom: 1rem;
}

.intro,
#route-count {
  color: var(--muted);
  margin-bottom: 0;
}

.skip-link {
  color: var(--primary);
  font-weight: 700;
  white-space: nowrap;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.layout {
  display: grid;
  grid-template-columns: minmax(280px, 390px) 1fr;
  gap: 1.5rem;
  max-width: 1180px;
  margin: 0 auto;
  padding: 1rem clamp(1rem, 4vw, 3rem) 3rem;
}

.panel,
.route-card,
.empty-state {
  background: color-mix(in srgb, var(--panel) 94%, transparent);
  border: 1px solid var(--border);
  border-radius: 1.25rem;
  box-shadow: var(--shadow);
}

.form-panel {
  padding: 1.25rem;
  align-self: start;
  position: sticky;
  top: 1rem;
}

form {
  display: grid;
  gap: 1rem;
}

label {
  display: grid;
  gap: 0.4rem;
  color: var(--text);
  font-weight: 700;
}

input,
textarea {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 0.8rem;
  padding: 0.8rem 0.9rem;
  background: var(--panel);
  color: var(--text);
  font: inherit;
  font-weight: 500;
}

textarea {
  resize: vertical;
}

input:focus,
textarea:focus,
button:focus-visible,
a:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--primary) 35%, transparent);
  outline-offset: 2px;
}

.form-actions,
.route-actions,
.section-heading {
  display: flex;
  gap: 0.65rem;
  flex-wrap: wrap;
  align-items: center;
}

.section-heading {
  justify-content: space-between;
  margin-bottom: 1rem;
}

button,
.open-link {
  border: 0;
  border-radius: 999px;
  padding: 0.72rem 1rem;
  background: var(--primary);
  color: #fff;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
  text-decoration: none;
  line-height: 1;
}

button:hover,
.open-link:hover {
  background: var(--primary-dark);
}

.secondary {
  background: transparent;
  color: var(--primary);
  border: 1px solid color-mix(in srgb, var(--primary) 35%, var(--border));
}

.secondary:hover {
  background: color-mix(in srgb, var(--primary) 10%, transparent);
}

.danger {
  color: var(--danger);
  border-color: color-mix(in srgb, var(--danger) 35%, var(--border));
}

.danger:hover {
  color: #fff;
  background: var(--danger-dark);
  border-color: var(--danger-dark);
}

.routes-list {
  display: grid;
  gap: 1rem;
}

.route-card {
  display: grid;
  grid-template-columns: 180px 1fr;
  overflow: hidden;
}

.route-image {
  min-height: 180px;
  background: linear-gradient(135deg, #b8d7ff, #d7f7df);
  background-position: center;
  background-size: cover;
}

.route-content {
  padding: 1.1rem;
}

.route-meta {
  color: var(--muted);
  font-weight: 700;
  font-size: 0.9rem;
  margin-bottom: 0.35rem;
}

.route-title {
  color: var(--text);
  text-decoration: none;
}

.route-title:hover {
  color: var(--primary);
  text-decoration: underline;
}

.route-description {
  color: var(--muted);
  white-space: pre-wrap;
}

.empty-state {
  padding: 2rem;
  text-align: center;
  color: var(--muted);
}

.empty-state h3 {
  color: var(--text);
}

.hidden {
  display: none !important;
}

@media (max-width: 820px) {
  .hero,
  .layout {
    display: block;
  }

  .skip-link {
    display: inline-block;
    margin-top: 1rem;
  }

  .form-panel {
    position: static;
    margin-bottom: 1.25rem;
  }

  .route-card {
    grid-template-columns: 1fr;
  }

  .route-image {
    min-height: 150px;
  }
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f172a;
    --panel: #111c31;
    --text: #e5eefc;
    --muted: #a5b4c8;
    --border: #2d3b55;
    --primary: #75a7ff;
    --primary-dark: #4f8df0;
    --danger: #ff8585;
    --danger-dark: #d95050;
    --shadow: 0 18px 45px rgba(0, 0, 0, 0.35);
  }

  body {
    background: radial-gradient(circle at top left, #15315c, transparent 34rem), var(--bg);
  }
}