@import url('https://fonts.googleapis.com/css2?family=Inter&display=swap');

:root {
  --blue-dark: #0d3b66;
  --blue-light: #3da5d9;
  --background-light: #f5f7fa;
  --text-light: #111;
  --background-dark: #121212;
  --text-dark: #e0e0e0;
  --container-bg-light: #fff;
  --container-bg-dark: #1e1e1e;
  --button-bg: #3da5d9;
  --button-hover-bg: #0d3b66;
  --button-text-color: #fff;
  --note-color: orange;
}

body {
  font-family: 'Inter', sans-serif;
  margin: 0;
  background-color: var(--background-light);
  color: var(--text-light);
  transition: background-color 0.3s, color 0.3s;
}

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

/* Header & nav */
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  background-color: var(--blue-dark);
  color: white;
  flex-wrap: wrap; /* for better responsiveness */
}

.logo {
  font-weight: 700;
  font-size: 1.5rem;
  user-select: none;
}

nav {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
}

nav a {
  color: white;
  text-decoration: none;
  margin-left: 1.5rem;
  font-weight: 600;
  position: relative;
  padding: 0.3rem 0.6rem;
  border-radius: 5px;
  transition: background-color 0.3s, color 0.3s;
  white-space: nowrap;
}

nav a.active,
nav a:hover {
  background-color: var(--blue-light);
  color: white;
}

nav button#mode-toggle {
  margin-left: 1.5rem;
  background: none;
  border: none;
  cursor: pointer;
  user-select: none;
  padding: 0.3rem;
  border-radius: 5px;
  transition: background-color 0.3s;
  color: white;
  display: flex;
  align-items: center;
}

nav button#mode-toggle:hover {
  background-color: var(--blue-light);
}

.mode-icon {
  width: 22px;
  height: 22px;
  fill: currentColor;
  stroke: none;
}

/* Container & content boxes */
.container {
  max-width: 900px;
  margin: 2rem auto;
  padding: 1.5rem 2rem;
  background: var(--container-bg-light);
  color: var(--text-light);
  border-radius: 10px;
  box-shadow: 0 0 15px rgb(0 0 0 / 0.1);
  transition: background-color 0.3s, color 0.3s;
}

body.dark .container {
  background: var(--container-bg-dark);
  color: var(--text-dark);
}

/* Details inside home */
.details p {
  font-size: 1.1rem;
  margin: 0.5rem 0;
}

/* Contact section */
.contact-info {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
}

.contact-info .person {
  flex: 1 1 250px;
  background: var(--blue-light);
  padding: 1rem 1.5rem;
  border-radius: 8px;
  color: white;
  box-shadow: 0 2px 8px rgba(61,165,217,0.4);
}

.contact-info .person h2 {
  margin-top: 0;
  border-bottom: 2px solid rgba(255 255 255 / 0.3);
  padding-bottom: 0.3rem;
}

.contact-info .person a {
  color: white;
  text-decoration: underline;
}

/* Buttons */
.drive-button,
.feedback-button {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  padding: 0.7rem 1.3rem;
  border-radius: 8px;
  text-decoration: none;
  box-shadow: 0 4px 10px rgb(61 165 217 / 0.4);
  transition: background-color 0.3s, box-shadow 0.3s;
  margin-top: 1rem;
  color: var(--button-text-color);
}

.drive-button {
  background-color: var(--button-bg);
}

.drive-button svg {
  width: 20px;
  height: 20px;
  stroke: currentColor;
  stroke-width: 2;
}

.drive-button:hover {
  background-color: var(--button-hover-bg);
  box-shadow: 0 6px 14px rgb(13 59 102 / 0.7);
}

.feedback-button {
  background-color: #ff9900;
  font-weight: 600;
  font-size: 1rem;
}

.feedback-button:hover {
  background-color: #cc7a00;
}

/* Table styling for syllabus */
table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 1rem;
}

thead {
  background-color: var(--blue-dark);
  color: white;
}

th, td {
  padding: 0.8rem 1rem;
  border: 1px solid #ccc;
  text-align: left;
}

body.dark thead {
  background-color: #0b2c4a;
  color: var(--text-dark);
}

body.dark th,
body.dark td {
  border-color: #444;
}

/* Announcements */
.announcement {
  border: 1px solid #ccc;
  border-radius: 10px;
  padding: 1rem 1.5rem;
  margin: 1.5rem 0;
  background-color: #f9f9f9;
  transition: background-color 0.3s, border-color 0.3s;
}

body.dark .announcement {
  background-color: #1f1f1f;
  border-color: #444;
}

.announcement h2 {
  margin-top: 0;
  font-size: 1.3rem;
}

.announcement p {
  margin: 0.5rem 0;
}

/* FAQ */
.faq-item {
  border-left: 4px solid var(--blue-light);
  margin-bottom: 2rem;
  padding-left: 1.5rem;
}

.faq-item h3.question {
  font-weight: bold;
  font-size: 1.2rem;
  margin: 0;
  color: var(--blue-dark);
  transition: color 0.3s;
}

body.dark .faq-item h3.question {
  color: var(--text-dark);
}

.faq-item p.answer {
  font-size: 1rem;
  margin-top: 0.5rem;
  line-height: 1.5;
  color: var(--text-light);
  transition: color 0.3s;
}

body.dark .faq-item p.answer {
  color: var(--text-dark);
}

.faq-item p.answer a {
  color: var(--blue-light);
  text-decoration: underline;
}

.faq-item p.answer a:hover {
  color: var(--blue-dark);
}

/* Note with icon */
.note {
  font-size: 1rem;
  color: var(--note-color);
  font-weight: 600;
  margin-top: 1rem;
  display: flex;
  align-items: center;
}

.icon-note {
  width: 20px;
  height: 20px;
  stroke: var(--note-color);
  fill: var(--note-color);
  margin-right: 0.5rem;
}

/* Footer */
footer {
  text-align: center;
  padding: 1rem 2rem;
  color: #777;
  font-size: 0.9rem;
  margin-top: 3rem;
  user-select: none;
}

/* Responsive */
@media (max-width: 600px) {
  .contact-info {
    flex-direction: column;
  }
  nav a {
    margin-left: 1rem;
    font-size: 0.9rem;
  }
}