/* ===========================
   STYLE KIT 1 — MONO + EMERALD
   =========================== */

body {
  font-family: 'Inter', Helvetica, Arial, sans-serif;
  background: #f9f9f9;
  margin: 0;
  padding: 0;
  color: #111;
  line-height: 1.6;
  font-size: 15px;
  overflow-y: scroll;
  min-height: 100vh;
  position: relative;
}

/* Header */
header {
  background: #fff;
  text-align: center;
  padding: 20px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.08);
}

header h1 {
  margin: 0;
  font-size: 1.6rem;   /* not too big */
  color: #16a34a;      /* emerald */
}

header h1 img {
  vertical-align: middle;
  margin-right: 8px;
}


.site-url {
  margin-top: 8px;
  font-size: 0.95rem;
  color: #555;
}

/* Main */
main {
  max-width: 800px;
  margin: 20px auto;
  padding: 0 18px;
}

/* Semester Section */
.semester {
  background: #fff;
  margin: 18px 0;
  border-radius: 8px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.08);
  overflow: hidden;
}

.semester-header {
  margin: 0;
  padding: 16px;
  color: #16a34a;
  cursor: pointer;
  font-weight: 600;
  font-size: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 2px solid #16a34a;
  transition: background 0.2s ease;
  user-select: none;
}

.semester-header:hover {
  background: #f0fdf4;  /* very light green */
}

.toggle-icon {
  font-size: 1.2em;
  font-weight: 700;
  color: #16a34a;
}

.semester-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
  
}

.semester.expanded .semester-content {
  max-height: 1000px;
  padding: 16px;
}

.empty-message {
  text-align: center;
  color: #666;
  font-style: italic;
  margin: 20px 0;
  font-size: 0.9rem;
}


/* Subject Cards */
.subject {
  margin: 12px 0;
  padding: 14px;
  background: #fafafa;
  border-radius: 6px;
  border-left: 4px solid #16a34a;
}

.subject h3 {
  margin: 0 0 8px 0;
  font-size: 1rem;
  color: #111;
}

.subject-header {
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 0;
  border-bottom: 1px solid #e0e0e0;
  margin-bottom: 8px;
}

.subject-header:hover {
  color: #16a34a;
}

.subject-toggle {
  font-size: 0.9em;
  font-weight: 700;
  color: #16a34a;
}

.subject-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.subject-section {
  margin: 12px 0;
}

.subject-section h4 {
  margin: 0 0 8px 0;
  font-size: 0.9rem;
  color: #000000;
  font-weight: 600;
}

.download-links {
  list-style-type: none;
  padding: 0;
  margin: 0;
}

.download-links li {
  margin: 8px 0;
}

/* Links */
a {
  text-decoration: none;
  color: #16a34a;
  font-weight: 600;
  font-size: 0.95rem;
}

a:hover {
  text-decoration: underline;
}

/* Footer */
footer {
  background: #111111d3;
  color: #fff;
  text-align: center;
  padding: 14px;
  margin-top: 30px;
  font-size: 0.9rem;
  position: absolute;
  bottom: 0;
  width: 100%;
  box-sizing: border-box;
}

footer p {
  margin: 0;
}

/* ===========================
   MEDIA QUERIES
   =========================== */
@media (max-width: 440px) {
  header h1 {
    font-size: 1.3rem;
  }

  .semester-header {
    font-size: 0.95rem;
    padding: 14px;
  }

  .subject h3 {
    font-size: 0.95rem;
  }

  body {
    font-size: 14px;
  }

  main {
    padding: 0 12px;
  }
}