:root {
  --bg: #030712;
  --card-bg: rgba(15, 23, 42, 0.8);
  --text: #f8fafc;
  --accent: #6366f1;
  --star-color: rgba(255, 255, 255, 0.4);
}

[data-theme="light"] {
  --bg: #f8fafc;
  --card-bg: rgba(255, 255, 255, 0.9);
  --text: #0f172a;
  --accent: #4f46e5;
  --star-color: rgba(79, 70, 229, 0.2);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  margin-block: 1rem;
}

body {
  background-color: var(--bg);
  color: var(--text);
  font-family: 'Plus Jakarta Sans', sans-serif;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  transition: 0.3s ease;
  padding: 20px;
}

/* GALAXY STARS BACKGROUND */
.stars {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  background-image:
    radial-gradient(1px 1px at 20px 30px, var(--star-color), transparent),
    radial-gradient(1px 1px at 150px 150px, var(--star-color), transparent),
    radial-gradient(2px 2px at 300px 400px, var(--star-color), transparent);
  background-size: 400px 400px;
}

/* THEME TOGGLE */
.theme-btn {
  position: absolute;
  top: 30px;
  background: var(--card-bg);
  border: 1px solid var(--accent);
  color: var(--text);
  padding: 8px 16px;
  border-radius: 50px;
  cursor: pointer;
  font-weight: 600;
}

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

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

[data-theme="light"] .icon-sun {
  display: none;
}

[data-theme="light"] .icon-moon {
  display: inline;
}

/* THE PROFESSIONAL CARD */
.content-card {
  background: var(--card-bg);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 3rem;
  border-radius: 24px;
  max-width: 700px;
  width: 100%;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

.highlight {
  color: var(--accent);
}

h1 {
  font-size: 2.5rem;
  line-height: 1.1;
  margin: 10px 0;
}

.badge {
  color: var(--accent);
  font-weight: 800;
  font-size: 12px;
  letter-spacing: 2px;
}

.subtitle {
  color: #94a3b8;
  margin-bottom: 2rem;
}

/* PERKS GRID */
.perks-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 15px;
  margin-bottom: 2rem;
}

.perk-card {
  background: rgba(255, 255, 255, 0.03);
  padding: 15px;
  border-radius: 12px;
  border-left: 4px solid var(--accent);
}

/* REQUIREMENTS */
.requirements {
  text-align: left;
  margin-bottom: 2rem;
}

ul {
  list-style: none;
  padding: 0;
}

li {
  margin-bottom: 8px;
  font-size: 0.95rem;
}

/* ACTION AREA */
.stipend-note {
  font-size: 12px;
  color: #64748b;
  margin-bottom: 10px;
}

.apply-btn {
  display: block;
  background: var(--accent);
  color: white;
  text-align: center;
  padding: 18px;
  border-radius: 12px;
  text-decoration: none;
  font-weight: 700;
  transition: transform 0.2s, box-shadow 0.2s;
}

.apply-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 20px rgba(99, 102, 241, 0.4);
}

/* MOBILE FIX */
@media (max-width: 600px) {
  .perks-grid {
    grid-template-columns: 1fr;
  }

  .content-card {
    padding: 1.5rem;
  }
}