:root {
  --page-bg: #0f1115;
  --text: #e6e8ef;
  --muted: #a5adcc;
  --accent: #6ea8fe;
  --track-bg: #151923;
  --control-bg: rgba(0, 0, 0, 0.35);
  --control-bg-hover: rgba(0, 0, 0, 0.5);
  --dot: #7f8db3;
  --dot-active: #ffffff;
  --radius: 12px;
  --shadow: 0 8px 30px rgba(0,0,0,0.25);
  --slide-h: min(70vh, 520px);
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, "Helvetica Neue", Arial, "Noto Sans", "Apple Color Emoji", "Segoe UI Emoji";
  background: radial-gradient(1200px 600px at 10% -10%, #1a2030 0%, #0f1115 40%, #0f1115 100%);
  color: var(--text);
}

.page-header {
  text-align: center;
  padding: 28px 16px 12px;
}

.page-header h1 {
  margin: 0 0 6px;
  font-size: clamp(20px, 2.6vw, 28px);
  font-weight: 700;
}

.page-header__subtitle {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.page-header__nav {
  margin-top: 8px;
  font-size: 13px;
  opacity: 0.85;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 4px 6px;
}

.page-header__nav-label {
  color: var(--muted);
}

.page-header__nav-sep {
  color: var(--muted);
}

.page-header__link {
  color: var(--accent);
  text-decoration: none;
  transition: opacity 0.15s ease;
}

.page-header__link:hover {
  opacity: 0.8;
  text-decoration: underline;
}

.page-header__back {
  margin: 8px 0 0;
  font-size: 13px;
}

.container { max-width: 960px; margin: 20px auto 80px; padding: 0 16px; }

.carousel {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--track-bg);
  box-shadow: var(--shadow);
}

.carousel__track {
  display: flex;
  will-change: transform;
  transition: transform 420ms cubic-bezier(.22, .61, .36, 1);
}

.carousel__slide {
  flex: 0 0 100%;
  min-height: var(--slide-h);
  display: grid;
  place-items: center;
  padding: 24px;
}

/* Nice, distinct slide backgrounds */
.carousel__slide:nth-child(1) { background: linear-gradient(135deg, #1f5eff, #a86af9); }
.carousel__slide:nth-child(2) { background: linear-gradient(135deg, #00c2a8, #6dd5fa); }
.carousel__slide:nth-child(3) { background: linear-gradient(135deg, #ff6a88, #ff99ac); }
.carousel__slide:nth-child(4) { background: linear-gradient(135deg, #ffd26f, #f7971e); }
.carousel__slide:nth-child(5) { background: linear-gradient(135deg, #5ee7df, #b490ca); }

.slide__content {
  text-align: center;
  color: #0b0f16;
  background: rgba(255, 255, 255, 0.85);
  border-radius: 16px;
  padding: clamp(16px, 3vw, 28px) clamp(16px, 4vw, 36px);
  box-shadow: 0 6px 20px rgba(0,0,0,0.15);
}
.slide__content h2 { margin: 0 0 8px; font-size: clamp(22px, 3.2vw, 34px); }
.slide__content p { margin: 0; font-size: clamp(14px, 2.2vw, 18px); color: #111827; }

.carousel__control {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  padding: 10px 14px;
  background: var(--control-bg);
  color: #fff;
  border: 0;
  border-radius: 10px;
  cursor: pointer;
  line-height: 1;
  backdrop-filter: blur(4px);
  transition: background 160ms ease, transform 160ms ease;
}
.carousel__control:hover { background: var(--control-bg-hover); }
.carousel__control:active { transform: translateY(-50%) scale(0.97); }
.carousel__control--prev { left: 10px; }
.carousel__control--next { right: 10px; }

.carousel__dots {
  position: absolute;
  left: 0; right: 0; bottom: 10px;
  display: flex;
  justify-content: center;
  gap: 8px;
}

.carousel__dot {
  width: 8px; height: 8px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: var(--dot);
  opacity: 0.8;
  cursor: pointer;
}
.carousel__dot[aria-current="true"] { background: var(--dot-active); opacity: 1; }

@media (hover: hover) and (pointer: fine) {
  .carousel:hover .carousel__control { background: var(--control-bg-hover); }
}

/* ─────────────────────────────────────────────────────────
   Mobile-first responsive enhancements
   ───────────────────────────────────────────────────────── */

@media (max-width: 768px) {
  .page-header {
    padding: 20px 16px 10px;
  }

  .page-header h1 {
    font-size: 22px;
  }

  .page-header__subtitle {
    font-size: 13px;
    line-height: 1.5;
  }

  /* Stack the links vertically on mobile */
  .page-header__nav {
    flex-direction: column;
    gap: 6px;
  }

  .page-header__nav-sep {
    display: none;
  }

  .page-header__link {
    padding: 4px 8px;
  }

  .container {
    margin: 16px auto 40px;
    padding: 0 12px;
  }
}

@media (max-width: 640px) {
  :root {
    --slide-h: min(55vh, 380px);
  }

  .container {
    margin-bottom: 32px;
  }

  /* Larger touch-friendly controls */
  .carousel__control {
    padding: 14px 16px;
    font-size: 18px;
    border-radius: 12px;
    min-width: 44px;
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .carousel__control--prev {
    left: 6px;
  }

  .carousel__control--next {
    right: 6px;
  }

  /* Larger tap targets for dots */
  .carousel__dots {
    bottom: 12px;
    gap: 12px;
  }

  .carousel__dot {
    width: 10px;
    height: 10px;
    /* Invisible larger tap area */
    position: relative;
  }

  .carousel__dot::before {
    content: '';
    position: absolute;
    top: -10px;
    left: -10px;
    right: -10px;
    bottom: -10px;
  }

  .slide__content {
    padding: 16px 20px;
    border-radius: 12px;
    max-width: 85%;
  }

  .slide__content h2 {
    font-size: 20px;
    margin-bottom: 6px;
  }

  .slide__content p {
    font-size: 14px;
  }
}

/* Extra small screens (iPhone SE, etc.) */
@media (max-width: 375px) {
  :root {
    --slide-h: min(50vh, 320px);
  }

  .page-header h1 {
    font-size: 18px;
  }

  .page-header p {
    font-size: 12px;
  }

  .carousel__control {
    padding: 12px 14px;
    font-size: 16px;
  }

  .slide__content {
    padding: 14px 16px;
    max-width: 90%;
  }

  .slide__content h2 {
    font-size: 18px;
  }

  .slide__content p {
    font-size: 13px;
  }
}

/* Improve touch feedback */
@media (hover: none) and (pointer: coarse) {
  .carousel__control:active {
    transform: translateY(-50%) scale(0.92);
    background: var(--control-bg-hover);
  }

  .carousel__dot:active {
    transform: scale(1.3);
  }
}