/* ============================================================
   TESTIMONIALS SECTION
   - 3 cột card cuộn dọc vô hạn (animation bằng @keyframes)
   - Mask gradient ở mép trên/dưới để card xuất hiện/ẩn mượt
   - Style đồng bộ với about/experience: warm bg, brand blue accent
   - Pause-on-hover + respect prefers-reduced-motion
============================================================ */

.testimonials-section {
  background-color: #fffcf8;
  background-image:
    radial-gradient(circle at 18% 22%, rgba(0, 123, 255, 0.07), transparent 45%),
    radial-gradient(circle at 82% 78%, rgba(245, 158, 11, 0.06), transparent 45%);
  padding-block: clamp(3rem, 6vw, 5.5rem);
}

.testimonials-section__orb {
  position: absolute;
  width: clamp(220px, 30vw, 420px);
  height: clamp(220px, 30vw, 420px);
  border-radius: 9999px;
  filter: blur(70px);
  pointer-events: none;
  z-index: 0;
}
.testimonials-section__orb--left {
  top: -8%;
  left: -10%;
  background: radial-gradient(circle, rgba(0, 123, 255, 0.18), transparent 70%);
}
.testimonials-section__orb--right {
  bottom: -12%;
  right: -8%;
  background: radial-gradient(circle, rgba(245, 158, 11, 0.16), transparent 70%);
}

.testimonials-section__index {
  position: absolute;
  top: 1.2rem;
  right: 1.4rem;
  font-family: 'JetBrains Mono', monospace;
  font-weight: 700;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  color: #007bff;
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid #e7e5e4;
  padding: 0.3rem 0.65rem;
  border-radius: 999px;
  z-index: 5;
}

/* ===== Heading ===== */
.testimonials-heading {
  text-align: center;
  max-width: 720px;
  margin-inline: auto;
  margin-bottom: clamp(2rem, 5vw, 3.5rem);
}

.testimonials-heading__title {
  font-family: 'Hanken Grotesk', 'Inter', sans-serif;
  font-weight: 800;
  font-size: clamp(2rem, 5.5vw, 3.4rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: #292524;
  margin-bottom: 0.85rem;
}
.testimonials-heading__title span {
  color: #007bff;
}

/* ===== Grid 3 cột cuộn dọc ===== */
.testimonials-grid {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  max-height: clamp(560px, 70vh, 760px);
  overflow: hidden;
  /* Mask top + bottom: card lướt vào/ra mượt mà */
  -webkit-mask-image: linear-gradient(to bottom, transparent 0%, #000 12%, #000 88%, transparent 100%);
  mask-image: linear-gradient(to bottom, transparent 0%, #000 12%, #000 88%, transparent 100%);
}

.testimonials-column {
  flex: 1 1 0;
  max-width: 360px;
  min-width: 0;
  overflow: hidden;
}
.testimonials-column--hidden-md { display: none; }
.testimonials-column--hidden-lg { display: none; }

@media (min-width: 768px) {
  .testimonials-column--hidden-md { display: block; }
}
@media (min-width: 1024px) {
  .testimonials-column--hidden-lg { display: block; }
}

/* Track: chiếm 200% chiều cao (2 bản sao chồng lên nhau), animation cuộn từ 0 → -50% */
.testimonials-track {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  width: 100%;
  /* JS sẽ set data-testimonials-ready="true" sau khi duplicate nhóm card */
}

/* Các card nằm trong group, vì vậy group mới là cấp cần tạo khoảng cách. */
.testimonials-track__group {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.testimonials-track[data-testimonials-ready="true"] {
  animation: testimonials-scroll linear infinite;
  will-change: transform;
}

/* Mỗi card không bị co để giữ khoảng cách đều giữa 2 bản duplicate */
.testimonials-track > * {
  flex-shrink: 0;
}

@keyframes testimonials-scroll {
  from { transform: translate3d(0, 0, 0); }
  to   { transform: translate3d(0, var(--testimonials-translate, -50%), 0); }
}

/* Pause-on-hover */
.testimonials-track:hover,
.testimonials-track:focus-within {
  animation-play-state: paused;
}

/* ===== Card ===== */
.testimonial-card {
  background: #ffffff;
  border: 1px solid #e7e5e4;
  border-radius: 1.25rem;
  padding: 1.6rem 1.5rem;
  box-shadow: 0 12px 28px -16px rgba(0, 123, 255, 0.18),
              0 2px 6px rgba(41, 37, 36, 0.04);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
}

.testimonial-card:hover {
  transform: translateY(-3px);
  border-color: rgba(0, 123, 255, 0.4);
  box-shadow: 0 18px 38px -16px rgba(0, 123, 255, 0.32),
              0 4px 10px rgba(41, 37, 36, 0.06);
}

.testimonial-card__text {
  font-size: 0.95rem;
  line-height: 1.6;
  color: #44403c;
  font-weight: 500;
  letter-spacing: -0.005em;
  text-align: justify;
  text-justify: inter-word;
  hyphens: auto;
  /* Mở đầu bằng dấu nháy đôi để tạo điểm nhấn thị giác */
  position: relative;
}
.testimonial-card__text::before {
  content: '"';
  position: absolute;
  top: -1.4rem;
  left: -0.2rem;
  font-family: 'Hanken Grotesk', sans-serif;
  font-size: 3.6rem;
  font-weight: 800;
  color: rgba(0, 123, 255, 0.18);
  line-height: 1;
  pointer-events: none;
}

.testimonial-card__author {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  border-top: 1px solid #f5f0eb;
  padding-top: 0.95rem;
}
.testimonial-card__avatar {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 9999px;
  object-fit: cover;
  border: 2px solid #fff;
  box-shadow: 0 0 0 1px #e7e5e4;
  flex-shrink: 0;
}
.testimonial-card__author > div {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
  min-width: 0;
}
.testimonial-card__author strong {
  font-size: 0.86rem;
  font-weight: 700;
  color: #292524;
  letter-spacing: -0.005em;
}
.testimonial-card__author small {
  font-size: 0.75rem;
  color: #78716c;
  margin-top: 0.1rem;
}

/* ===== Footer marquee text ===== */
.testimonials-marquee {
  margin-top: clamp(2rem, 4vw, 3rem);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  color: #78716c;
  flex-wrap: wrap;
}
.testimonials-marquee i {
  display: inline-block;
  width: 0.4rem;
  height: 0.4rem;
  background: #007bff;
  border-radius: 9999px;
}

/* ===== Responsive ===== */
@media (max-width: 639px) {
  .testimonials-grid {
    gap: 1rem;
    max-height: 520px;
  }
  .testimonial-card {
    padding: 1.3rem 1.2rem;
  }
  .testimonial-card__text {
    font-size: 0.9rem;
  }
}