/* ========== GLOBAL ========== */
:root {
  --primary: #007acc;
  --primary-light: #00b4d8;
  --bg: #f9fafc;
  --text: #1e1e1e;
  --gray: #555;
  --border: rgba(0,0,0,0.08);
  --radius: 12px;
  --shadow: 0 4px 14px rgba(0,0,0,0.08);
  --transition: all 0.25s ease;
  --font: "Inter", "Poppins", "Segoe UI", sans-serif;
}

html, body {
  margin: 0;
  padding: 0;
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  scroll-behavior: smooth;
}

img { max-width: 100%; border-radius: var(--radius); }
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Container */
.container {
  width: min(1100px, 90%);
  margin: 0 auto;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.6rem 1.3rem;
  border-radius: var(--radius);
  background: var(--primary);
  color: #fff;
  border: none;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  text-align: center;
}
.btn:hover {
  background: var(--primary-light);
  transform: translateY(-2px);
}
.btn.secondary {
  background: linear-gradient(90deg, var(--primary), var(--primary-light));
}
.btn.secondary:hover {
  transform: translateY(-3px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

/* ========== NAVBAR ========== */

.site-logo {
  height: 64px;       /* reduce from 36px or more */
  width: auto;
  margin-right: 8px;
  border-radius: 6px;
  object-fit: contain;
  vertical-align: middle;
  transition: transform 0.2s ease;
}

.site-logo:hover {
  transform: scale(1.05);
}

.site-header {
  background: #fff;
  box-shadow: 0 1px 4px rgba(0,0,0,0.08);
  position: sticky;
  top: 0;
  z-index: 10;
}
.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
}
.brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text);
}
.navlinks {
  display: flex;
  gap: 1.5rem;
}
.navlinks a {
  color: var(--gray);
  font-weight: 500;
  position: relative;
  transition: 0.3s;
}
.navlinks a.active,
.navlinks a:hover {
  color: var(--primary);
}
.mobile-toggle {
  display: none;
}

/* Responsive Navbar */
@media (max-width: 720px) {
  .navlinks {
    display: none;
    flex-direction: column;
    background: #fff;
    position: absolute;
    top: 70px; right: 20px;
    padding: 1rem 2rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
  }
  .navlinks.open {
    display: flex;
  }
  .mobile-toggle {
    display: block;
    background: none;
    border: none;
    font-size: 1.5rem;
  }
}

/* ========== HERO ========== */
.hero {
  background: linear-gradient(180deg, #e8f5ff 0%, #ffffff 100%);
  padding: 80px 0 50px;
  text-align: center;
}
.hero h1 {
  font-size: 2.4rem;
  margin-bottom: 1rem;
}
.hero p {
  color: var(--gray);
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto;
}

/* ========== GRID (Posts, Courses, Labs) ========== */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 2rem;
  margin: 2rem 0;
}

.card {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.4rem;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 6px 18px rgba(0,0,0,0.12);
}
.card h3 {
  margin: 0.5rem 0;
  font-size: 1.2rem;
}
.card p {
  color: var(--gray);
  line-height: 1.5;
  font-size: 0.95rem;
}

/* ========== LABS PAGE ========== */
.labs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  margin: 2rem 0 3rem;
}

.lab-card {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  position: relative;
  transition: var(--transition);
  cursor: pointer;
}
.lab-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 20px rgba(0,0,0,0.12);
}
.lab-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}
.lab-card .lab-info {
  padding: 1rem 1.3rem 1.5rem;
}
.lab-card h3 {
  margin: 0.4rem 0;
}
.lab-card p {
  color: var(--gray);
  font-size: 0.95rem;
}

/* ========== MODAL ========== */
.modal {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.65);
  align-items: center;
  justify-content: center;
  z-index: 100;
}
.modal.active {
  display: flex;
}
.modal-content {
  background: #fff;
  padding: 2rem;
  border-radius: var(--radius);
  max-width: 600px;
  width: 90%;
  box-shadow: 0 8px 30px rgba(0,0,0,0.25);
  animation: fadeUp 0.4s ease both;
}
.modal-content h3 {
  margin-top: 0;
}
.modal-content p {
  margin: 1rem 0;
  color: var(--gray);
}
.modal-close {
  position: absolute;
  top: 15px;
  right: 25px;
  font-size: 1.5rem;
  cursor: pointer;
  color: #666;
}
.modal-close:hover {
  color: var(--primary);
}

/* ========== FOOTER ========== */
.footer {
  background: #fff;
  border-top: 1px solid var(--border);
  padding: 1.5rem 0;
  text-align: center;
  color: var(--gray);
  font-size: 0.9rem;
}
.footer .links {
  margin-top: 0.5rem;
}
.footer .links a {
  color: var(--gray);
  margin: 0 8px;
  transition: 0.2s;
}
.footer .links a:hover {
  color: var(--primary);
}

.video-card {
  text-align: center;
  margin: 40px auto;
  width: 80%;
  max-width: 600px;
  transition: transform 0.3s ease;
}

.video-card img.video-thumb {
  width: 100%;
  border-radius: 12px;
  box-shadow: 0 4px 8px rgba(0,0,0,0.2);
  transition: 0.3s;
}

.video-card img.video-thumb:hover {
  transform: scale(1.02);
  box-shadow: 0 6px 12px rgba(0,0,0,0.3);
}

.video-card h3 {
  margin-top: 12px;
  font-size: 1.2rem;
  color: #222;
}

#langButton {
  margin-left: 1rem;
  background-color: #0b75e7;
  border: none;
  padding: 6px 12px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.9rem;
}

#langButton:hover {
  background-color: #4a8dc7;
}


/* ========== ANIMATIONS ========== */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(25px); }
  to { opacity: 1; transform: translateY(0); }
}