@import url("https://fonts.googleapis.com/css2?family=Kanit:wght@300;400;600;700&display=swap");

/* =========================
   Theme tokens
   ========================= */
:root {
  --bg0: #070a12;
  --bg1: #0b1630;
  --bg2: #0a2a3a;

  --text: #eaf2ff;
  --muted: #a9c1e8;

  --card: rgba(255, 255, 255, 0.1);
  --card2: rgba(255, 255, 255, 0.06);
  --border: rgba(255, 255, 255, 0.16);

  --accent: #5cc8ff;
  --accent2: #7c5cff;

  --shadow: 0 18px 45px rgba(0, 0, 0, 0.55);
  --shadow2: 0 10px 28px rgba(0, 0, 0, 0.35);
}

/* Light theme override */
body[data-theme="light"] {
  --bg0: #f7faff;
  --bg1: #eef4ff;
  --bg2: #e7f7ff;

  --text: #0b1220;
  --muted: #4b607a;

  --card: rgba(255, 255, 255, 0.86);
  --card2: rgba(255, 255, 255, 0.7);
  --border: rgba(10, 20, 40, 0.12);

  --accent: #007bff;
  --accent2: #6f42c1;

  --shadow: 0 18px 45px rgba(10, 20, 40, 0.14);
  --shadow2: 0 10px 28px rgba(10, 20, 40, 0.1);
}

/* =========================
   Base
   ========================= */
html,
body {
  height: 100%;
}

body {
  font-family: "Kanit", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--text);
  background: radial-gradient(
      1000px 700px at 15% 15%,
      rgba(124, 92, 255, 0.22),
      transparent 55%
    ),
    radial-gradient(
      900px 650px at 85% 25%,
      rgba(92, 200, 255, 0.2),
      transparent 55%
    ),
    radial-gradient(
      900px 700px at 50% 85%,
      rgba(0, 200, 150, 0.12),
      transparent 55%
    ),
    linear-gradient(135deg, var(--bg1), var(--bg0));
  background-attachment: fixed;
}

/* =========================
   Header (Hero)
   ========================= */
header {
  position: relative;
  padding: 44px 16px 32px !important;
  border-bottom-left-radius: 28px;
  border-bottom-right-radius: 28px;
  background: linear-gradient(
      135deg,
      rgba(92, 200, 255, 0.2),
      rgba(124, 92, 255, 0.18)
    ),
    linear-gradient(135deg, rgba(10, 20, 40, 0.92), rgba(5, 8, 18, 0.92));
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  overflow: hidden;
}

header::before {
  content: "";
  position: absolute;
  inset: -2px;
  background: radial-gradient(
      600px 200px at 20% 15%,
      rgba(92, 200, 255, 0.35),
      transparent 60%
    ),
    radial-gradient(
      500px 220px at 85% 10%,
      rgba(124, 92, 255, 0.35),
      transparent 62%
    );
  pointer-events: none;
  opacity: 0.9;
}

header h3 {
  position: relative;
  font-weight: 800;
  letter-spacing: 0.2px;
  margin-bottom: 10px;
  text-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
}

header p {
  position: relative;
  margin: 0;
  color: var(--muted);
  line-height: 1.5;
}

/* Theme toggle */
.toggle-wrap {
  position: relative;
  margin-top: 18px;
  display: flex;
  justify-content: center;
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-radius: 999px;
  background: linear-gradient(
    135deg,
    rgba(255, 255, 255, 0.14),
    rgba(255, 255, 255, 0.06)
  );
  border: 1px solid var(--border);
  color: var(--text);
  box-shadow: var(--shadow2);
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
  user-select: none;
}

.theme-toggle:hover {
  transform: translateY(-2px);
  box-shadow: 0 18px 45px rgba(0, 0, 0, 0.35);
  background: linear-gradient(
    135deg,
    rgba(92, 200, 255, 0.18),
    rgba(124, 92, 255, 0.14)
  );
}

.theme-toggle .icon {
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  background: rgba(0, 0, 0, 0.18);
  border: 1px solid var(--border);
}

body[data-theme="light"] .theme-toggle .icon {
  background: rgba(255, 255, 255, 0.7);
}

/* =========================
   Title
   ========================= */
main h4 {
  text-align: center;
  margin: 28px 0 18px;
  font-weight: 800;
  color: var(--text) !important;
}

main h4::after {
  content: "";
  display: block;
  width: 180px;
  height: 4px;
  margin: 10px auto 0;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  opacity: 0.9;
}

/* =========================
   Cards + reveal animation
   ========================= */
.card {
  background: linear-gradient(180deg, var(--card), var(--card2));
  border: 1px solid var(--border);
  border-radius: 18px;
  box-shadow: var(--shadow2);
  overflow: hidden;

  /* reveal base */
  transform: translateY(18px);
  opacity: 0;
  transition: transform 0.6s cubic-bezier(0.2, 0.75, 0.2, 1), opacity 0.6s ease,
    box-shadow 0.2s ease, border-color 0.2s ease;
}

.card.in-view {
  transform: translateY(0);
  opacity: 1;
}

.card:hover {
  box-shadow: var(--shadow);
  border-color: rgba(92, 200, 255, 0.32);
}

.card-body {
  color: var(--text);
}

/* Override Bootstrap text-primary to be theme-friendly */
.text-primary {
  color: var(--text) !important;
}

.card h5 {
  font-weight: 800;
  margin-bottom: 10px;
}

.card h5::before {
  content: "";
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 999px;
  margin-right: 10px;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  box-shadow: 0 0 18px rgba(92, 200, 255, 0.35);
  transform: translateY(-1px);
}

.card p {
  color: var(--muted);
  line-height: 1.6;
}

/* Buttons */
.btn-primary {
  border: none;
  border-radius: 999px;
  padding: 8px 16px;
  font-weight: 700;
  color: #07101c !important;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  transition: transform 0.18s ease, box-shadow 0.18s ease, filter 0.18s ease;
}

.btn-primary:hover {
  transform: translateY(-2px);
  filter: saturate(1.08);
  box-shadow: 0 18px 40px rgba(92, 200, 255, 0.18);
}

/* Footer */
footer {
  color: var(--muted);
  opacity: 0.95;
}

@media (max-width: 576px) {
  header {
    border-radius: 0;
  }
}