:root {
  --bg: #0f172a;
  --bg-alt: #020617;
  --card-bg: #111827;
  --accent: #38bdf8;
  --accent-soft: rgba(56, 189, 248, 0.15);
  --text: #e5e7eb;
  --text-muted: #9ca3af;
  --border: #1f2937;
  --radius-lg: 1.25rem;
  --radius-md: 0.85rem;
  --shadow-soft: 0 18px 45px rgba(0, 0, 0, 0.55);
  --shadow-card: 0 14px 40px rgba(15, 23, 42, 0.75);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: radial-gradient(circle at top, #1e293b 0, #020617 45%, #000 100%);
  color: var(--text);
  min-height: 100vh;
}

/* HEADER */

.app-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: linear-gradient(to bottom, rgba(15, 23, 42, 0.98), rgba(15, 23, 42, 0.85), transparent);
  padding: 1.5rem clamp(1.25rem, 4vw, 2.5rem) 1rem;
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(148, 163, 184, 0.2);
}

.app-header h1 {
  margin: 0;
  font-size: clamp(1.5rem, 2.4vw, 2.1rem);
  letter-spacing: 0.03em;
}

.app-header p {
  margin: 0.35rem 0 1rem;
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* NAV */

.category-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.category-pill {
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.35rem 0.9rem;
  font-size: 0.82rem;
  cursor: pointer;
  background: rgba(15, 23, 42, 0.7);
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition: background 0.18s ease, border-color 0.18s ease, color 0.18s ease,
    transform 0.12s ease, box-shadow 0.18s ease;
}

.category-pill span.dot {
  width: 0.4rem;
  height: 0.4rem;
  border-radius: 999px;
  background: var(--accent);
  opacity: 0.6;
}

.category-pill:hover {
  background: rgba(15, 23, 42, 0.95);
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: 0 0 0 1px rgba(56, 189, 248, 0.3);
  transform: translateY(-1px);
}

.category-pill.active {
  background: var(--accent-soft);
  border-color: var(--accent);
  color: var(--accent);
}

/* MAIN / SECTIONS */

main {
  padding: 1rem clamp(1.25rem, 4vw, 2.5rem) 3rem;
}

.category-section {
  margin-top: 2.5rem;
  padding: 1.6rem 1.4rem 1.9rem;
  background: radial-gradient(circle at top left, rgba(56, 189, 248, 0.08), transparent 60%),
    linear-gradient(to bottom, rgba(15, 23, 42, 0.95), rgba(15, 23, 42, 0.93));
  border-radius: var(--radius-lg);
  border: 1px solid rgba(30, 64, 175, 0.9);
  box-shadow: var(--shadow-soft);
  position: relative;
  overflow: hidden;
}

.category-section::before {
  content: "";
  position: absolute;
  inset: -40%;
  background:
    radial-gradient(circle at 0 0, rgba(56, 189, 248, 0.12), transparent 55%),
    radial-gradient(circle at 100% 0, rgba(129, 140, 248, 0.12), transparent 52%),
    radial-gradient(circle at 50% 120%, rgba(15, 118, 110, 0.1), transparent 60%);
  opacity: 0.8;
  mix-blend-mode: screen;
  pointer-events: none;
  z-index: 0;
}

.category-section > * {
  position: relative;
  z-index: 1;
}

.category-title {
  margin: 0 0 1.3rem;
  font-size: 1.1rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: #cbd5f5;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.category-title::before {
  content: "";
  width: 2.7rem;
  height: 1px;
  background: linear-gradient(to right, rgba(56, 189, 248, 0.7), transparent);
}

/* GRID */

.media-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1rem;
}

/* CARDS */

.media-card {
  background: linear-gradient(145deg, rgba(15, 23, 42, 0.95), rgba(15, 23, 42, 0.98));
  border-radius: var(--radius-md);
  padding: 0.75rem;
  border: 1px solid rgba(30, 64, 175, 0.7);
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  transition: transform 0.14s ease, box-shadow 0.14s ease, border-color 0.14s ease,
    background 0.14s ease;
}

.media-card:hover {
  transform: translateY(-4px) scale(1.01);
  box-shadow: 0 18px 42px rgba(15, 23, 42, 0.95);
  border-color: var(--accent);
  background: radial-gradient(circle at top left, rgba(56, 189, 248, 0.18), rgba(15, 23, 42, 0.98));
}

/* MEDIA */

.media-wrapper {
  border-radius: calc(var(--radius-md) - 0.2rem);
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: radial-gradient(circle at 50% 0, rgba(148, 163, 184, 0.18), #020617 65%);
  display: flex;
  align-items: center;
  justify-content: center;
}

.media-wrapper img,
.media-wrapper video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.media-wrapper video {
  outline: none;
  border: none;
}

/* INFO */

.media-info {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  font-size: 0.82rem;
}

.media-name {
  margin: 0;
  font-size: 0.9rem;
  font-weight: 600;
  color: #e5e7eb;
}

.media-dates {
  margin: 0;
  color: var(--text-muted);
}

.media-path {
  margin: 0;
  color: #9ca3af;
  font-size: 0.76rem;
  word-break: break-all;
  opacity: 0.9;
}

/* Loader */

.loader {
  margin-top: 2rem;
  text-align: center;
  font-size: 0.95rem;
  color: var(--text-muted);
}

/* Responsive tweaks */

@media (max-width: 640px) {
  .category-section {
    padding: 1.2rem 1rem 1.4rem;
  }

  .media-grid {
    grid-template-columns: 1fr;
  }
}