/* Friend Circle Frontend - Optimized CSS */
/* Based on: hexo-theme-butterfly/default.min.css */
/* Optimized: 2026-07-18 */

:root {
  /* Base palette */
  --text-color-light: #1a1a2e;
  --text-color-dark: #F7F7FA;
  --background-color-light: #f0f2f8;
  --background-color-dark: #141417;
  --container-bg-color-light: #ffffff;
  --container-bg-color-dark: #1D1E22;
  --hover-color: #3b82f6;
  --hover-color-light: #60a5fa;
  --author-color-light: #6b7280;
  --author-color-dark: #9ca3af;
  --modal-bg-blur: 20px;
  --shadow-color-light: rgba(0, 0, 0, 0.06);
  --shadow-color-dark: rgba(0, 0, 0, 0.4);
  --shadow-hover-light: rgba(59, 130, 246, 0.15);
  --shadow-hover-dark: rgba(96, 165, 250, 0.1);
  --border-color-light: #e5e7eb;
  --border-color-dark: #2a2b30;
  --border-hover-light: #93c5fd;
  --border-hover-dark: #3b82f6;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);

  /* Default theme = light (also serves as fallback for "follow system" in light mode) */
  --text-color: var(--text-color-light);
  --background-color: var(--background-color-light);
  --tag-bg-color: #e0e0e0;
  --container-bg-color: var(--container-bg-color-light);
  --author-color: var(--author-color-light);
  --shadow-color: var(--shadow-color-light);
  --shadow-hover-color: var(--shadow-hover-light);
  --border-color: var(--border-color-light);
  --border-hover-color: var(--border-hover-light);
  --modal-bg-color: rgba(255, 255, 255, 0.5);
  --modal-content-bg-color: rgba(248, 250, 252, 0.85);
  --load-more-btn-bg-color: var(--container-bg-color-light);
}

/* Follow system: dark mode when no explicit data-theme is set */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]):not([data-theme="dark"]) {
    --text-color: var(--text-color-dark);
    --background-color: var(--background-color-dark);
    --tag-bg-color: #3a3a3a;
    --container-bg-color: var(--container-bg-color-dark);
    --author-color: var(--author-color-dark);
    --shadow-color: var(--shadow-color-dark);
    --shadow-hover-color: var(--shadow-hover-dark);
    --border-color: var(--border-color-dark);
    --border-hover-color: var(--border-hover-dark);
    --modal-bg-color: rgba(0, 0, 0, 0.4);
    --modal-content-bg-color: rgba(20, 20, 24, 0.7);
    --load-more-btn-bg-color: var(--container-bg-color-dark);
  }
}

[data-theme=light] {
  --text-color: var(--text-color-light);
  --background-color: var(--background-color-light);
  --tag-bg-color: #e0e0e0;
  --container-bg-color: var(--container-bg-color-light);
  --author-color: var(--author-color-light);
  --shadow-color: var(--shadow-color-light);
  --shadow-hover-color: var(--shadow-hover-light);
  --border-color: var(--border-color-light);
  --border-hover-color: var(--border-hover-light);
  --modal-bg-color: rgba(255, 255, 255, 0.5);
  --modal-content-bg-color: rgba(248, 250, 252, 0.85);
  --load-more-btn-bg-color: var(--container-bg-color-light);
}

[data-theme=dark] {
  --text-color: var(--text-color-dark);
  --background-color: var(--background-color-dark);
  --tag-bg-color: #3a3a3a;
  --container-bg-color: var(--container-bg-color-dark);
  --author-color: var(--author-color-dark);
  --shadow-color: var(--shadow-color-dark);
  --shadow-hover-color: var(--shadow-hover-dark);
  --border-color: var(--border-color-dark);
  --border-hover-color: var(--border-hover-dark);
  --modal-bg-color: rgba(0, 0, 0, 0.4);
  --modal-content-bg-color: rgba(20, 20, 24, 0.7);
  --load-more-btn-bg-color: var(--container-bg-color-dark);
}

/* ===== Container ===== */
#friend-circle-container {
  width: 100%;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
}

/* ===== Top Stats Card ===== */
#top-fc-container {
  display: flex;
  position: relative;
  width: 100%;
  margin: 8px 0;
  background-color: var(--container-bg-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-color);
  box-shadow: 0 2px 8px var(--shadow-color);
  transition: border var(--transition-normal), box-shadow var(--transition-normal);
  flex-direction: column;
}

#top-fc-container:hover {
  border: 1px solid var(--border-hover-color);
  box-shadow: 0 4px 16px var(--shadow-hover-color);
}

.stats-card-container {
  display: flex;
  background-color: var(--container-bg-color);
  justify-content: space-between;
  width: 100%;
}

.stats-card-container div {
  display: flex;
  align-items: flex-end;
}

.stats-card-left {
  flex: 1;
  padding: 20px 0 20px 20px;
}

.stats-card-left .stats-item {
  flex-direction: column;
  margin: 0 20px;
  align-items: center;
  font-weight: 800;
  font-size: 32px;
  color: var(--hover-color);
  transition: transform var(--transition-normal);
}

.stats-card-left .stats-item:hover {
  transform: scale(1.08);
}

.stats-card-left .stats-item .stats-label {
  color: var(--author-color);
  font-weight: 600;
  font-size: 16px;
  margin-top: 4px;
}

.stats-card-right {
  flex-direction: column;
}

.stats-card-right .stats-controls {
  border-radius: 0 var(--radius-lg) 0 var(--radius-md);
  border: 1px solid var(--border-color);
  overflow: hidden;
}

.stats-card-right .stats-controls button {
  padding: 5px 20px;
  border: none;
  font-size: 14px;
  transition: all var(--transition-normal);
  background-color: var(--background-color);
  color: var(--text-color);
  cursor: pointer;
}

.stats-card-right .stats-controls button:hover {
  background-color: var(--hover-color);
  color: #fff;
}

.stats-card-right .stats-version {
  line-height: 1rem;
  align-items: center;
  color: #aaa;
  margin: 10px 0 0 auto;
  padding: 5px 10px;
  background-color: var(--background-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md) 0 0 var(--radius-md);
  width: 40px;
  white-space: nowrap;
  overflow: hidden;
  text-align: left;
  transition: width 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.stats-card-right .stats-version:hover {
  width: 200px;
  min-width: 60px;
}

.stats-card-right .stats-version #version-text {
  margin-right: 8px;
}

#version-text.version-latest {
  color: #00a023d2;
}

#version-text.version-update {
  color: #ff6637d2;
}

#version-text.version-error {
  color: #d50000d2;
}

/* ===== Random Article Bar ===== */
.random-container {
  border-top: 1px solid var(--border-color);
  padding: 10px 20px;
  width: 100%;
  height: 60px;
  display: flex;
  flex-direction: row;
  align-items: center;
  box-sizing: border-box;
}

.random-content-container {
  display: flex;
  font-size: 15px;
  width: calc(100% - 100px);
  flex: 1;
}

.random-content {
  display: block;
  max-width: 100%;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  width: 100%;
}

.random-container-title {
  font-weight: 700;
}

.random-author,
.random-title {
  font-weight: 600;
  color: var(--hover-color);
}

.random-button-container {
  display: flex;
  border: 1px solid var(--border-color);
  border-radius: 20px;
  overflow: hidden;
  width: 100px;
}

#refresh-random-article {
  color: #888 !important;
  text-decoration: none !important;
  background-color: var(--background-color);
  width: 50%;
  padding: 5px 10px;
  border: none;
  font-size: 14px;
  cursor: pointer;
  transition: all var(--transition-normal);
}

.random-link-button {
  background-color: var(--hover-color);
  color: #fff !important;
  text-decoration: none !important;
  padding: 5px 10px;
  font-size: 14px;
  width: 50%;
  border: none;
  cursor: pointer;
  transition: all var(--transition-normal);
}

#refresh-random-article:hover {
  background-color: var(--border-color);
  color: var(--text-color) !important;
}

.random-link-button:hover {
  background-color: var(--hover-color-light);
  filter: brightness(1.1);
}

/* ===== Modal ===== */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--modal-bg-color);
  backdrop-filter: blur(var(--modal-bg-blur));
  -webkit-backdrop-filter: blur(var(--modal-bg-blur));
  z-index: 999;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

.modal-open {
  opacity: 1;
  visibility: visible;
}

.modal-content {
  opacity: 0;
  position: relative;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) translateY(-50px);
  width: 360px;
  background-color: var(--modal-content-bg-color);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 24px;
  border: 1px solid var(--border-color);
  z-index: 1000;
  max-height: 90%;
  overflow: hidden;
  border-radius: var(--radius-lg);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
  transition: transform var(--transition-normal), opacity var(--transition-normal);
}

.modal.modal-open .modal-content {
  transform: translate(-50%, -50%) translateY(0);
  opacity: 1;
}

.modal-content:hover #modal-bg {
  transform: scale(1.1);
}

#modal-bg {
  position: absolute;
  filter: blur(5px);
  opacity: 0.15;
  z-index: 0;
  border-radius: 125px 125px 12px 125px !important;
  margin: 0 !important;
  width: 250px;
  height: 250px;
  right: -20px;
  bottom: -20px;
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1) !important;
}

#modal-author-avatar {
  display: block;
  margin: 5px auto !important;
  border-radius: 50% !important;
  width: 110px;
  height: 110px;
  object-fit: cover;
}

#modal-author-name-link {
  display: block;
  text-align: center;
  font-size: 15px;
  margin: 15px 0;
  color: var(--hover-color);
  text-decoration: none;
  font-weight: 600;
  transition: color var(--transition-fast);
}

#modal-author-name-link:hover {
  text-decoration: underline;
}

.modal-content hr {
  margin: 20px 0;
  border: none;
  border-top: 1px solid var(--border-color);
}

#modal-articles-container {
  position: relative;
  z-index: 1;
  border-top: 2px double var(--hover-color);
  margin-top: 20px;
  padding-top: 10px;
}

.modal-article {
  display: flex;
  flex-wrap: wrap;
  margin-bottom: 10px;
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--border-color);
}

.modal-article:last-child {
  border-bottom: none;
}

.modal-article .modal-article-title {
  color: var(--text-color);
  font-size: 17px;
  line-height: 1.3;
  cursor: pointer;
  max-height: 2.5em;
  width: 100%;
  margin-bottom: 5px;
  text-decoration: none;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: color var(--transition-fast);
}

.modal-article .modal-article-title:hover {
  color: var(--hover-color);
  text-decoration: underline;
}

.modal-article .modal-article-date {
  font-size: 12px;
  width: 100%;
  color: var(--author-color);
  padding: 5px;
  cursor: default;
  text-align: right;
}

/* ===== Articles Grid ===== */
.articles-container {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  width: 100%;
}

/* ===== Card ===== */
.card {
  background-color: var(--container-bg-color);
  border-radius: var(--radius-md);
  padding: 12px;
  border: 1px solid var(--border-color);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  height: 160px;
  box-shadow: 0 2px 6px var(--shadow-color);
  transition: border var(--transition-normal), box-shadow var(--transition-normal), transform var(--transition-normal);
  animation: cardFadeIn 0.4s ease-out backwards;
}

@keyframes cardFadeIn {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

#random-article:hover,
.card:hover {
  border: 1px solid var(--border-hover-color);
  box-shadow: 0 4px 20px var(--shadow-hover-color);
  transform: translateY(-2px);
}

.card-title {
  z-index: 1;
  font-size: 16px;
  color: var(--text-color);
  font-weight: 520;
  cursor: pointer;
  margin-bottom: 10px;
  line-height: 1.5;
  max-height: 4.5em;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  line-clamp: 3;
  -webkit-box-orient: vertical;
  transition: color var(--transition-fast);
}

.card-title:hover {
  color: var(--hover-color);
  text-decoration: underline;
}

.card-author,
.card-date {
  font-size: 12px;
  color: var(--author-color);
  padding: 5px;
  line-height: 15px;
}

.card-author:hover,
.summary-indicator:hover {
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.author-container {
  display: flex;
  z-index: 1;
  align-items: center;
  gap: 10px;
  min-width: 0;
  max-width: 100%;
  flex-wrap: nowrap;
}

/* ===== Summary Indicator ===== */
.summary-indicator {
  display: inline-block;
  padding: 2px;
  height: 25px;
  width: 25px;
  min-width: 25px;
  background-color: var(--background-color);
  border: 1px solid var(--border-color);
  border-radius: 50%;
  transition: box-shadow var(--transition-fast), border-color var(--transition-fast);
  flex-shrink: 0;
  position: relative;
  z-index: 10;
  pointer-events: auto;
  cursor: pointer;
}

.summary-indicator:hover {
  border-color: var(--hover-color);
}

.summary-indicator svg {
  fill: var(--text-color);
  pointer-events: none;
  transition: fill var(--transition-fast);
}

.summary-indicator:hover svg {
  fill: var(--hover-color);
}

/* ===== Summary Popup ===== */
.summary-popup {
  position: fixed;
  opacity: 0;
  transition: all var(--transition-normal);
  background-color: var(--container-bg-color);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
  border: 1px solid var(--border-color);
  max-width: 500px;
  z-index: 9999;
  border-radius: var(--radius-md);
  pointer-events: auto;
  overflow: hidden;
}

.summary-popup-title {
  display: flex;
  justify-content: space-between;
  background-color: var(--background-color);
  align-items: center;
  font-size: 15px;
  font-weight: 700;
  color: var(--hover-color);
  border-bottom: 1px solid var(--border-color);
  padding: 8px 15px;
}

.summary-popup-title .summary-model,
.summary-popup-updated-at {
  color: var(--text-color);
  font-size: 12px;
  font-weight: 300;
}

.summary-popup-title span svg {
  fill: var(--hover-color);
  height: 30px;
  width: 20px;
  margin-right: 5px;
}

.summary-popup-title span {
  display: flex;
  line-height: 30px;
  align-items: center;
}

.summary-popup-content {
  font-size: 14px;
  max-height: 300px;
  overflow-y: auto;
  line-height: 1.6;
  padding: 12px 15px;
}

/* Custom scrollbar for popup content */
.summary-popup-content::-webkit-scrollbar {
  width: 4px;
}

.summary-popup-content::-webkit-scrollbar-track {
  background: transparent;
}

.summary-popup-content::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 4px;
}

.summary-popup-content::-webkit-scrollbar-thumb:hover {
  background: var(--author-color);
}

.summary-popup-updated-at {
  padding: 5px 15px;
  text-align: right;
}

/* ===== Card Author ===== */
.card-author {
  cursor: pointer;
  background-color: var(--background-color);
  border: 1px solid var(--border-color);
  border-radius: 15px;
  display: flex;
  padding-right: 10px;
  align-items: center;
  transition: box-shadow var(--transition-fast), border-color var(--transition-fast);
  flex: 0 1 auto;
  max-width: 110px;
  min-width: 0;
  position: relative;
  z-index: 1;
}

.card-author:hover {
  border-color: var(--hover-color);
}

#friend-circle-container .card-author img {
  border-radius: 50%;
  width: 15px;
  height: 15px;
  margin: 0 2px !important;
  object-fit: cover;
  flex-shrink: 0;
}

.card-author-name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  min-width: 0;
  max-width: 70px;
  flex-shrink: 1;
}

/* ===== Card Date ===== */
.card-date {
  position: absolute;
  z-index: 1;
  bottom: 10px;
  cursor: default;
  right: 10px;
  display: flex;
  align-items: center;
}

/* ===== Card Background Decoration ===== */
#friend-circle-container .card-bg {
  cursor: default;
  z-index: 0;
  border-radius: 50% !important;
  margin: 0 !important;
  position: absolute;
  bottom: -20px;
  right: -16px;
  width: 140px;
  height: 140px;
  opacity: 0.35;
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1), bottom 0.3s ease, right 0.3s ease, opacity var(--transition-normal);
}

#friend-circle-container .card:hover .card-bg {
  transform: scale(1.1);
  bottom: -10px;
  right: -8px;
  opacity: 0.5;
}

/* ===== Load More Button ===== */
#load-more-btn {
  color: var(--text-color);
  font-size: 15px;
  background-color: var(--container-bg-color);
  cursor: pointer;
  width: 200px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  padding: 8px;
  transition: all var(--transition-normal);
  margin: 20px auto;
  display: block;
  font-weight: 500;
}

#load-more-btn:hover {
  background-color: var(--hover-color);
  width: 280px;
  color: #fff;
  border-color: var(--hover-color);
  box-shadow: 0 4px 12px var(--shadow-hover-color);
}

/* ===== Stats Footer ===== */
#stats-container {
  font-size: 13px;
  text-align: right;
  margin-top: 20px;
  color: var(--author-color);
}

#stats-container > * {
  margin-bottom: 3px;
}

#stats-container a {
  color: var(--author-color);
  text-decoration: none;
  transition: color var(--transition-fast);
}

#stats-container a:hover {
  color: var(--hover-color);
}

/* ===== Responsive ===== */
@media screen and (max-width: 550px) {
  .stats-card-left .stats-item {
    margin: 0 10px;
    font-weight: 700;
    font-size: 28px;
  }

  .stats-card-left .stats-item .stats-label {
    font-size: 14px;
  }

  .stats-card-container {
    flex-direction: column;
  }

  .stats-card-container div {
    justify-content: center;
    align-items: center;
  }

  .stats-card-left {
    padding: 20px;
  }

  .stats-card-right .stats-controls {
    border-radius: var(--radius-md);
    margin-bottom: 20px;
  }

  .stats-card-right .stats-version {
    display: none;
  }

  .articles-container {
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
  }

  .card {
    height: 150px;
    padding: 10px;
  }

  .card-title {
    font-size: 15px;
  }

  .random-content-container {
    font-size: 14px;
  }
}

@media screen and (max-width: 440px) {
  .modal-content {
    width: 88%;
    padding: 20px;
  }
}

@media screen and (max-width: 380px) {
  .articles-container {
    grid-template-columns: 1fr;
  }

  .card {
    height: auto;
    min-height: 120px;
  }
}