/* ============================================================
 * IT LEARN — Homepage styles
 *   • Hero stats
 *   • Course cards (3 khóa học)
 *   • Why-IT-LEARN strip
 *   • Gallery grid + lightbox
 * ============================================================ */

/* ============ HERO STATS ============ */
.home-hero {
  padding: 80px 24px 60px;
  text-align: center;
  position: relative;
}
.home-hero h1 {
  margin: 22px auto 0;
  max-width: 18ch;
}
.home-hero .lead {
  margin-top: 18px;
  font-size: 18px;
}
.home-hero .hero-cta {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin-top: 32px;
}
.hero-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  max-width: 760px;
  margin: 50px auto 0;
}
.hero-stats > div {
  background: rgba(255,255,255,.04);
  border: 1px solid var(--line);
  border-radius: var(--r);
  padding: 22px 18px;
  text-align: center;
  backdrop-filter: blur(8px);
}
.hero-stats b {
  display: block;
  font-family: var(--display);
  font-size: clamp(28px, 4.2vw, 44px);
  font-weight: 600;
  letter-spacing: -.02em;
  background: linear-gradient(120deg, #fca5a5 0%, #f87171 50%, #60a5fa 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.05;
}
.hero-stats span {
  display: block;
  margin-top: 6px;
  color: var(--text-dim);
  font-size: 13px;
  letter-spacing: .02em;
}
@media (min-width: 760px) {
  .hero-stats { grid-template-columns: repeat(4, 1fr); }
}

/* ============ COURSE CARDS ============ */
.courses-section {
  padding: 80px 24px;
}
.courses-section .head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 50px;
}
.courses-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
  max-width: 1180px;
  margin: 0 auto;
  align-items: stretch;
}
@media (min-width: 760px) { .courses-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1280px) { .courses-grid { grid-template-columns: repeat(4, 1fr); } }

.course-card {
  position: relative;
  background: linear-gradient(180deg, rgba(255,255,255,.04), rgba(255,255,255,.02));
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 28px 26px 26px;
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
  transition: transform .35s ease, border-color .25s ease, box-shadow .35s ease;
}
.course-card::before {
  content: "";
  position: absolute;
  inset: -1px -1px auto -1px;
  height: 4px;
  background: var(--card-accent, var(--grad));
  opacity: .9;
}
.course-card::after {
  content: "";
  position: absolute;
  top: -80px; right: -80px;
  width: 220px; height: 220px;
  background: var(--card-accent, var(--grad));
  filter: blur(60px);
  opacity: .15;
  pointer-events: none;
  transition: opacity .35s ease;
}
.course-card:hover {
  transform: translateY(-6px);
  border-color: var(--line-strong);
  box-shadow: 0 30px 70px -30px rgba(0,0,0,.6);
}
.course-card:hover::after { opacity: .3; }

.course-card .badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: .15em;
  text-transform: uppercase;
  color: var(--card-text, var(--red-bright));
  padding: 6px 12px;
  border: 1px solid currentColor;
  border-radius: 999px;
  align-self: flex-start;
  background: rgba(0,0,0,.2);
}
.course-card h3 {
  margin: 18px 0 8px;
  font-size: 26px;
  font-family: var(--display);
}
.course-card .desc {
  color: var(--text-dim);
  font-size: 14.5px;
  line-height: 1.6;
  margin-bottom: 18px;
  min-height: 66px;
}
.course-card ul {
  list-style: none;
  padding: 0;
  margin: 0 0 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.course-card ul li {
  position: relative;
  padding-left: 22px;
  font-size: 13.5px;
  color: var(--text);
}
.course-card ul li::before {
  content: "";
  position: absolute;
  left: 0; top: 6px;
  width: 14px; height: 14px;
  background: var(--card-accent, var(--grad));
  border-radius: 50%;
  opacity: .85;
  mask: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='none' stroke='black' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'><polyline points='3 8 7 12 13 4'/></svg>") center/contain no-repeat;
  -webkit-mask: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='none' stroke='black' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'><polyline points='3 8 7 12 13 4'/></svg>") center/contain no-repeat;
}
.course-card .meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  margin: 0 0 22px;
  padding: 14px 0;
  border-top: 1px dashed var(--line);
  border-bottom: 1px dashed var(--line);
  color: var(--text-dim);
  font-size: 12.5px;
  font-family: var(--mono);
}
.course-card .meta span { display: inline-flex; gap: 6px; align-items: center; }
.course-card .meta b {
  color: var(--text);
  font-family: var(--display);
  font-weight: 600;
  font-size: 14px;
}
.course-card .price {
  font-family: var(--display);
  font-size: 24px;
  font-weight: 600;
  color: var(--card-text, var(--red-bright));
  margin: auto 0 18px;  /* đẩy xuống đáy card → 4 giá thẳng hàng */
}
.course-card .cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 18px;
  border-radius: 999px;
  background: var(--card-accent, var(--grad));
  color: #fff;
  font-weight: 600;
  font-size: 14.5px;
  margin-top: auto;
  box-shadow: 0 14px 36px -14px var(--card-shadow, rgba(220,38,38,.5));
  transition: transform .25s ease;
}
.course-card .cta:hover { transform: translateY(-2px); }

/* Per-card accents */
.course-card.card-manual {
  --card-accent: linear-gradient(135deg, #ef4444 0%, #dc2626 60%, #991b1b 100%);
  --card-text: var(--red-bright);
  --card-shadow: rgba(220,38,38,.5);
}
.course-card.card-istqb {
  --card-accent: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 60%, #1e3a8a 100%);
  --card-text: var(--navy-bright);
  --card-shadow: rgba(30,58,138,.5);
}
.course-card.card-api {
  --card-accent: linear-gradient(135deg, #ff8a4d 0%, #ff6c37 60%, #d35420 100%);
  --card-text: #ff9966;
  --card-shadow: rgba(255,108,55,.5);
}
.course-card.card-ai {
  --card-accent: linear-gradient(135deg, #a855f7 0%, #8b5cf6 60%, #6d28d9 100%);
  --card-text: #c4b5fd;
  --card-shadow: rgba(139,92,246,.5);
}

/* ============ WHY GRID ============ */
.why-section {
  padding: 60px 24px;
  background: linear-gradient(180deg, rgba(8,13,31,0) 0%, rgba(30,58,138,.08) 50%, rgba(8,13,31,0) 100%);
}
.why-section .head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 48px;
}
.why-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  max-width: 1180px;
  margin: 0 auto;
}
@media (min-width: 720px) { .why-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1020px) { .why-grid { grid-template-columns: repeat(4, 1fr); } }
.why-card {
  background: rgba(255,255,255,.04);
  border: 1px solid var(--line);
  border-radius: var(--r);
  padding: 24px 22px;
  transition: border-color .25s, transform .25s, background .25s;
}
.why-card:hover {
  border-color: rgba(248,113,113,.35);
  background: rgba(248,113,113,.06);
  transform: translateY(-3px);
}
.why-card .icon {
  width: 44px; height: 44px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: rgba(248,113,113,.1);
  color: var(--red-bright);
  margin-bottom: 14px;
}
.why-card h4 {
  font-family: var(--display);
  font-size: 18px;
  font-weight: 600;
  margin: 0 0 6px;
  color: var(--text);
}
.why-card p {
  color: var(--text-dim);
  font-size: 14px;
  margin: 0;
}

/* Gallery + lightbox: xem assets/css/gallery.css (dùng chung) */

/* ============ MENTOR INTRO ============ */
.mentors-section {
  padding: 60px 24px;
}
.mentors-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
  max-width: 980px;
  margin: 40px auto 0;
}
@media (min-width: 760px) { .mentors-grid { grid-template-columns: repeat(2, 1fr); } }

.mentor-card {
  background: rgba(255,255,255,.04);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 28px 26px;
  display: flex;
  gap: 18px;
  align-items: flex-start;
}
.mentor-avatar {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  flex-shrink: 0;
  background: var(--grad);
  display: grid;
  place-items: center;
  color: #fff;
  font-family: var(--display);
  font-size: 26px;
  font-weight: 600;
  box-shadow: var(--shadow-red);
  overflow: hidden;
}
.mentor-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  display: block;
}
.mentor-card.istqb .mentor-avatar { background: var(--grad-navy); box-shadow: var(--shadow-navy); }
.mentor-card h4 {
  font-family: var(--display);
  font-size: 20px;
  margin: 0 0 4px;
}
.mentor-card .role {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 10px;
}
.mentor-card p {
  color: var(--text-dim);
  font-size: 14px;
  margin: 0;
}

/* ============ FOOTER ADJUST ============ */
.home-footer {
  padding: 60px 24px 40px;
  border-top: 1px solid var(--line);
  text-align: center;
}
.home-footer p { color: var(--text-mute); font-size: 13px; margin: 12px 0; }