:root {
  --bg: #fbfbfd;
  --card-bg: #ffffff;
  --text-primary: #1a1d29;
  --text-secondary: #5b6070;
  --accent: #e5231b;
  --accent-soft: #fde8e7;
  --card-border: #eef0f3;
  --card-shadow: 0 2px 10px rgba(20, 20, 40, 0.04);
  --chevron: #b7bac3;
  --switch-bg: #ffffff;
  --switch-border: #e7e8ee;
  --footer-color: #9aa0ad;
  --deco-opacity: 1;
  --grid-dot: rgba(26, 29, 41, 0.09);
}

[data-theme="dark"] {
  --bg: #0f1117;
  --card-bg: #171a23;
  --text-primary: #f2f3f7;
  --text-secondary: #9198a8;
  --accent: #ff4a42;
  --accent-soft: #3a1e1f;
  --card-border: #262a36;
  --card-shadow: 0 2px 14px rgba(0, 0, 0, 0.35);
  --chevron: #565c6b;
  --switch-bg: #171a23;
  --switch-border: #2a2e3a;
  --footer-color: #676d7b;
  --deco-opacity: 0.35;
  --grid-dot: rgba(242, 243, 247, 0.09);
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
}

body {
  background: var(--bg);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--text-primary);
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
  transition: background 0.3s ease, color 0.3s ease;
}

.backdrop {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

.deco {
  position: absolute;
  opacity: var(--deco-opacity);
  transition: opacity 0.3s ease;
}

.deco-grid {
  inset: 0;
  background-image:
    radial-gradient(circle, var(--grid-dot) 1.4px, transparent 1.4px);
  background-size: 28px 28px;
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 0%, transparent 75%);
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 0%, transparent 75%);
}

.deco-left {
  top: -10%;
  left: -15%;
  width: 55%;
  height: 60%;
  background: radial-gradient(circle at 30% 30%, rgba(229, 35, 27, 0.08), transparent 60%);
}

.deco-right {
  top: 5%;
  right: -10%;
  width: 40%;
  height: 45%;
  background: radial-gradient(circle at 70% 30%, rgba(229, 35, 27, 0.06), transparent 60%);
}

.page {
  position: relative;
  z-index: 1;
  max-width: 860px;
  margin: 0 auto;
  padding: 28px 24px 40px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.topbar {
  display: flex;
  justify-content: flex-end;
}

.theme-switch {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--switch-bg);
  border: 1px solid var(--switch-border);
  border-radius: 999px;
  padding: 10px 18px;
  box-shadow: 0 2px 10px rgba(20, 20, 40, 0.05);
}

.theme-divider {
  width: 1px;
  height: 16px;
  background: var(--switch-border);
}

.theme-btn {
  background: none;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  padding: 2px;
  border-radius: 50%;
  transition: color 0.2s ease;
}

.theme-btn.active {
  color: var(--accent);
}

.theme-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.hero {
  text-align: center;
  padding: 24px 0 36px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 28px;
}

.logo-mark img {
  display: block;
  width: 56px;
  height: 56px;
}

.logo-text {
  font-family: 'Poppins', sans-serif;
  font-weight: 800;
  font-size: 2.6rem;
  letter-spacing: -0.5px;
}

.logo-ug {
  color: var(--accent);
}

.logo-mail {
  color: var(--text-primary);
}

.title {
  font-family: 'Poppins', sans-serif;
  font-weight: 700;
  font-size: 2.1rem;
  margin: 0 0 14px;
  color: var(--text-primary);
}

.subtitle {
  margin: 0;
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.6;
}

.cards {
  display: flex;
  flex-direction: column;
  gap: 16px;
  flex: 1;
}

.card {
  display: flex;
  align-items: center;
  gap: 18px;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-left: 4px solid var(--accent);
  border-radius: 16px;
  padding: 20px 22px;
  text-decoration: none;
  color: inherit;
  box-shadow: var(--card-shadow);
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.2s ease;
  cursor: pointer;
}

.card:hover,
.card:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(20, 20, 40, 0.09);
}

.card:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

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

.card-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  min-width: 46px;
  border-radius: 12px;
  background: var(--accent-soft);
  color: var(--accent);
}

.card-label {
  flex: 1;
  font-family: 'Poppins', sans-serif;
  font-weight: 600;
  font-size: 1.08rem;
  color: var(--text-primary);
}

.card-chevron {
  color: var(--chevron);
  font-size: 1.4rem;
  line-height: 1;
}

.footer {
  text-align: center;
  margin-top: 40px;
  color: var(--footer-color);
  font-size: 0.9rem;
}

.footer p {
  margin: 0;
}

@media (max-width: 640px) {
  .page {
    padding: 20px 16px 32px;
  }

  .logo-text {
    font-size: 2rem;
  }

  .logo-mark img {
    width: 44px;
    height: 44px;
  }

  .title {
    font-size: 1.6rem;
  }

  .subtitle {
    font-size: 0.95rem;
  }

  .card {
    padding: 16px 16px;
    gap: 14px;
    border-radius: 14px;
  }

  .card-icon {
    width: 40px;
    height: 40px;
    min-width: 40px;
  }

  .card-label {
    font-size: 0.98rem;
  }
}

@media (min-width: 641px) and (max-width: 900px) {
  .page {
    padding: 24px 32px 36px;
  }
}