/**
 * RSSWidget v1.0.0 — Stylesheet
 *
 * All rules are scoped under .rss-widget or [data-rss-theme]
 * so they won't leak into the host page.
 *
 * Customise via CSS custom properties on :root or the container.
 *
 * @see https://github.com/BasicallyHowToDo/RSS-Feed-Widgets
 */

/* ------------------------------------------------------------------ */
/*  Design tokens                                                     */
/* ------------------------------------------------------------------ */

:root {
  --rss-font:
    -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu,
    sans-serif;
  --rss-bg: #ffffff;
  --rss-surface: #ffffff;
  --rss-border: #e8e8e8;
  --rss-text: #1a1a2e;
  --rss-text-secondary: #6b7280;
  --rss-text-muted: #71717a;
  --rss-accent: #4f46e5;
  --rss-accent-light: #eef2ff;
  --rss-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
  --rss-shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.08);
  --rss-radius: 14px;
  --rss-radius-sm: 8px;
  --rss-radius-pill: 100px;
  --rss-transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Auto dark mode (follows OS) */
@media (prefers-color-scheme: dark) {
  [data-rss-theme="auto"] {
    --rss-bg: #0f0f1a;
    --rss-surface: #1a1a2e;
    --rss-border: #2a2a3e;
    --rss-text: #e8e8f0;
    --rss-text-secondary: #9ca3af;
    --rss-text-muted: #858c98;
    --rss-accent: #818cf8;
    --rss-accent-light: #1e1b4b;
    --rss-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
    --rss-shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.3);
  }
}

/* Forced dark mode */
[data-rss-theme="dark"] {
  --rss-bg: #0f0f1a;
  --rss-surface: #1a1a2e;
  --rss-border: #2a2a3e;
  --rss-text: #e8e8f0;
  --rss-text-secondary: #9ca3af;
  --rss-text-muted: #858c98;
  --rss-accent: #818cf8;
  --rss-accent-light: #1e1b4b;
  --rss-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
  --rss-shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.3);
}

/* ------------------------------------------------------------------ */
/*  Container                                                         */
/* ------------------------------------------------------------------ */

.rss-widget {
  font-family: var(--rss-font);
  color: var(--rss-text);
  max-width: 1200px;
  margin: 0 auto;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ------------------------------------------------------------------ */
/*  Header                                                            */
/* ------------------------------------------------------------------ */

.rss-header {
  margin-bottom: 28px;
}

.rss-header h2 {
  font-size: 1.6rem;
  font-weight: 700;
  margin: 0 0 6px;
  letter-spacing: -0.02em;
  line-height: 1.3;
}

.rss-header h2 a {
  text-decoration: none;
  transition: color var(--rss-transition);
}

.rss-header h2 a:hover {
  color: var(--rss-accent);
}

.rss-header p {
  color: var(--rss-text-secondary);
  font-size: 0.95rem;
  margin: 0;
  line-height: 1.5;
}

/* ------------------------------------------------------------------ */
/*  Filter bar                                                        */
/* ------------------------------------------------------------------ */

.rss-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--rss-border);
}

.rss-filter {
  background: var(--rss-surface);
  border: 1px solid var(--rss-border);
  padding: 7px 16px;
  border-radius: var(--rss-radius-pill);
  cursor: pointer;
  font-size: 0.82rem;
  font-weight: 500;
  font-family: var(--rss-font);
  color: var(--rss-text-secondary);
  transition: all var(--rss-transition);
  white-space: nowrap;
  line-height: 1.4;
}

.rss-filter:hover {
  border-color: var(--rss-accent);
  color: var(--rss-accent);
  background: var(--rss-accent-light);
}

.rss-filter:focus-visible {
  outline: 2px solid var(--rss-accent);
  outline-offset: 2px;
}

.rss-filter.active {
  background: var(--rss-accent);
  color: #ffffff;
  border-color: var(--rss-accent);
}

/* ------------------------------------------------------------------ */
/*  Card grid                                                         */
/* ------------------------------------------------------------------ */

.rss-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}

@media (max-width: 680px) {
  .rss-grid {
    grid-template-columns: 1fr;
  }
}

/* ------------------------------------------------------------------ */
/*  Card                                                              */
/* ------------------------------------------------------------------ */

.rss-card {
  background: var(--rss-surface);
  border: 1px solid var(--rss-border);
  border-radius: var(--rss-radius);
  padding: 24px;
  display: flex;
  flex-direction: column;
  box-shadow: var(--rss-shadow);
  transition:
    box-shadow var(--rss-transition),
    transform var(--rss-transition),
    border-color var(--rss-transition);
  will-change: transform;

  /* Entrance animation */
  opacity: 0;
  transform: translateY(12px);
  animation: rss-card-in 0.4s ease forwards;
}

.rss-card:hover {
  box-shadow: var(--rss-shadow-hover);
  transform: translateY(-2px);
  border-color: transparent;
}

@keyframes rss-card-in {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Staggered entrance — first 12 cards */
.rss-card:nth-child(1) {
  animation-delay: 0.02s;
}
.rss-card:nth-child(2) {
  animation-delay: 0.05s;
}
.rss-card:nth-child(3) {
  animation-delay: 0.08s;
}
.rss-card:nth-child(4) {
  animation-delay: 0.11s;
}
.rss-card:nth-child(5) {
  animation-delay: 0.14s;
}
.rss-card:nth-child(6) {
  animation-delay: 0.17s;
}
.rss-card:nth-child(7) {
  animation-delay: 0.2s;
}
.rss-card:nth-child(8) {
  animation-delay: 0.23s;
}
.rss-card:nth-child(9) {
  animation-delay: 0.26s;
}
.rss-card:nth-child(10) {
  animation-delay: 0.29s;
}
.rss-card:nth-child(11) {
  animation-delay: 0.32s;
}
.rss-card:nth-child(12) {
  animation-delay: 0.35s;
}

/* Respect user motion preference */
@media (prefers-reduced-motion: reduce) {
  .rss-card {
    animation: none;
    opacity: 1;
    transform: none;
  }
  .rss-card:hover {
    transform: none;
  }
}

/* ------------------------------------------------------------------ */
/*  Card internals                                                    */
/* ------------------------------------------------------------------ */

.rss-card-category {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  border-radius: var(--rss-radius-pill);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  margin-bottom: 14px;
  align-self: flex-start;
  line-height: 1.4;
}

.rss-card-title {
  margin: 0 0 10px;
  font-size: 1.08rem;
  font-weight: 650;
  line-height: 1.35;
  letter-spacing: -0.01em;
}

.rss-card-title a {
  color: var(--rss-text);
  text-decoration: none;
  transition: color var(--rss-transition);
}

.rss-card-title a:hover {
  color: var(--rss-accent);
}

.rss-card-title a:focus-visible {
  outline: 2px solid var(--rss-accent);
  outline-offset: 2px;
  border-radius: 2px;
}

.rss-card-date {
  font-size: 0.78rem;
  color: var(--rss-text-muted);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 5px;
}

.rss-card-date::before {
  content: "";
  display: inline-block;
  width: 4px;
  height: 4px;
  background: var(--rss-text-muted);
  border-radius: 50%;
  flex-shrink: 0;
}

.rss-card-description {
  font-size: 0.88rem;
  color: var(--rss-text-secondary);
  line-height: 1.6;
  flex-grow: 1;
  margin: 0;
}

.rss-card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  color: var(--rss-accent);
  text-decoration: none;
  font-weight: 600;
  margin-top: 16px;
  transition: gap var(--rss-transition);
}

.rss-card-link:hover {
  gap: 10px;
}

.rss-card-link::after {
  content: "\2192"; /* → */
  font-size: 1rem;
  transition: transform var(--rss-transition);
}

.rss-card-link:hover::after {
  transform: translateX(2px);
}

.rss-card-link:focus-visible {
  outline: 2px solid var(--rss-accent);
  outline-offset: 2px;
  border-radius: 2px;
}

/* ------------------------------------------------------------------ */
/*  Skeleton loading                                                  */
/* ------------------------------------------------------------------ */

.rss-skeleton {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}

.rss-skeleton-card {
  background: var(--rss-surface);
  border: 1px solid var(--rss-border);
  border-radius: var(--rss-radius);
  padding: 24px;
}

.rss-skeleton-line {
  background: linear-gradient(
    90deg,
    var(--rss-border) 25%,
    transparent 50%,
    var(--rss-border) 75%
  );
  background-size: 200% 100%;
  animation: rss-shimmer 1.5s infinite ease-in-out;
  border-radius: var(--rss-radius-sm);
}

.rss-skeleton-badge {
  width: 90px;
  height: 24px;
  margin-bottom: 16px;
  border-radius: var(--rss-radius-pill);
}
.rss-skeleton-title {
  width: 85%;
  height: 20px;
  margin-bottom: 10px;
}
.rss-skeleton-title-short {
  width: 60%;
  height: 20px;
  margin-bottom: 14px;
}
.rss-skeleton-date {
  width: 100px;
  height: 14px;
  margin-bottom: 14px;
}
.rss-skeleton-desc {
  width: 100%;
  height: 14px;
  margin-bottom: 8px;
}
.rss-skeleton-desc-short {
  width: 70%;
  height: 14px;
  margin-bottom: 18px;
}
.rss-skeleton-link {
  width: 100px;
  height: 16px;
}

@keyframes rss-shimmer {
  0% {
    background-position: 200% 0;
  }
  100% {
    background-position: -200% 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .rss-skeleton-line {
    animation: none;
  }
}

/* ------------------------------------------------------------------ */
/*  Error + empty states                                              */
/* ------------------------------------------------------------------ */

.rss-error {
  text-align: center;
  padding: 48px 24px;
  color: var(--rss-text-secondary);
  border: 1px dashed var(--rss-border);
  border-radius: var(--rss-radius);
}

.rss-error-icon {
  font-size: 2rem;
  margin-bottom: 12px;
  opacity: 0.5;
}

.rss-error p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.5;
}

.rss-empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: 48px 24px;
  color: var(--rss-text-muted);
  font-size: 0.92rem;
}