:root {
  --font-family: 'Inter', system-ui, -apple-system, sans-serif;
  --bg-color: #e2e9e3;
  --card-bg: #e6efe7;
  --card-border: #c5d4c6;
  --text-primary: #1a2319;
  --text-secondary: #3d4f3c;
  --accent: #22c55e;
  --accent-secondary: #15803d;
  --hover-bg: #d6e0d7;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.07);
  --h2-border: rgba(34, 197, 94, 0.4);
  --team-hover: rgba(34, 197, 94, 0.12);
  --btn-text: #0f172a;
}

[data-theme="dark"] {
  --bg-color: #0d110f;
  --card-bg: #161b18;
  --card-border: #222a24;
  --text-primary: #f0f2ef;
  --text-secondary: #8a9089;
  --accent: #22c55e;
  --accent-secondary: #4ade80;
  --hover-bg: #1c241e;
  --shadow: 0 4px 12px rgba(0, 0, 0, 0.5);
  --h2-border: rgba(34, 197, 94, 0.45);
  --team-hover: rgba(34, 197, 94, 0.1);
  --btn-text: #151a17;
}

body {
  font-family: var(--font-family);
  background: var(--bg-color);
  color: var(--text-primary);
  margin: 0;
  padding: 0;
  display: flex;
  justify-content: center;
  min-height: 100vh;
}

.main-wrapper {
  width: 100%;
  max-width: 700px;
  padding: 40px 20px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

header {
  text-align: center;
  margin-bottom: 20px;
}

.logo {
  font-size: 3rem;
  font-weight: 800;
  color: var(--accent);
  margin-bottom: 8px;
}

.tagline {
  color: var(--text-secondary);
  font-size: 1.1rem;
  margin: 0;
}

h2 {
  font-size: 1.25rem;
  margin-top: 0;
  margin-bottom: 16px;
  border-bottom: 2px solid var(--h2-border);
  padding-bottom: 8px;
  color: var(--text-primary);
}

.card {
  background: var(--card-bg);
  padding: 24px;
  border-radius: 12px;
  border: 1px solid var(--card-border);
  box-shadow: var(--shadow);
  line-height: 1.6;
}

.card p {
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.card p:last-child {
  margin-bottom: 0;
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 20px;
  margin-top: 10px;
}

.team-member {
  background: var(--hover-bg);
  padding: 20px 10px;
  border-radius: 12px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  transition: transform 0.2s ease, background 0.2s, border-color 0.2s;
  border: 1px solid var(--card-border);
  text-decoration: none;
  color: inherit;
  cursor: pointer;
}

.team-member:hover {
  transform: translateY(-5px);
  border-color: var(--accent);
  background: var(--team-hover);
}

.team-member img {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  object-fit: cover;
  margin-bottom: 12px;
  border: 2px solid var(--accent);
  background-color: var(--hover-bg);
}

.member-info h3 {
  font-size: 0.95rem;
  margin: 0 0 4px 0;
  color: var(--text-primary);
  font-weight: 600;
}

.member-info p {
  margin: 0 !important;
  color: var(--text-secondary);
}

.student-id {
  font-size: 0.85rem;
  font-family: monospace;
  margin-bottom: 4px !important;
}

.student-dept {
  font-size: 0.75rem;
  opacity: 0.8;
  line-height: 1.3;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
}

.report-card {
  background: var(--card-bg);
  padding: 20px;
  border-radius: 12px;
  border: 1px solid var(--card-border);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--shadow);
}

.report-card h3 {
  margin: 0 0 16px 0;
  font-size: 1rem;
  color: var(--text-primary);
}

.btn {
  display: inline-block;
  padding: 10px;
  background: var(--accent);
  color: var(--btn-text);
  text-align: center;
  text-decoration: none;
  border-radius: 8px;
  font-weight: 600;
  transition: opacity 0.2s, background 0.2s;
  box-shadow: var(--shadow);
}

.btn:hover {
  opacity: 0.95;
  background: var(--accent-secondary);
  color: var(--btn-text);
}

.btn.disabled {
  background: var(--hover-bg);
  color: var(--text-secondary);
  pointer-events: none;
  cursor: default;
}

.links-section {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 10px;
}

.link-item {
  display: block;
  padding: 16px;
  background: var(--card-bg);
  color: var(--text-primary);
  text-decoration: none;
  border-radius: 12px;
  font-weight: 600;
  text-align: center;
  transition: background 0.2s, border-color 0.2s, color 0.2s;
  border: 1px solid var(--card-border);
}

.link-item:hover {
  background: var(--hover-bg);
  border-color: var(--accent);
  color: var(--accent-secondary);
}

footer {
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.8rem;
  margin-top: 20px;
}

.theme-toggle-wrap {
  position: fixed;
  top: 16px;
  right: 16px;
  z-index: 10;
}

.theme-toggle {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 999px;
  font-family: var(--font-family);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-primary);
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s, color 0.2s;
  box-shadow: var(--shadow);
}

.theme-toggle:hover {
  border-color: var(--accent);
  background: var(--hover-bg);
}

.theme-toggle svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.theme-toggle .icon-sun {
  display: none;
}

.theme-toggle .icon-moon {
  display: block;
}

[data-theme="dark"] .theme-toggle .icon-sun {
  display: block;
}

[data-theme="dark"] .theme-toggle .icon-moon {
  display: none;
}