@import url('../../assets/css/fonts.css');
@import url('../../assets/css/header-logo.css');

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* Light theme colors */
  --bg-primary: #ffffff;
  --bg-secondary: #f8f8f8;
  --text-primary: #1a1a1a;
  --text-secondary: #4a4a4a;
  --text-muted: #757575;
  --border-color: #e0e0e0;
  --accent-color: #2c3e50;
  --accent-color-light: #506d8b;
  --hover-bg: #f0f0f0;
  --shadow: rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] {
  /* Dark theme colors - Based on #313638 and #6a4c93 */
  --bg-primary: #1f2123;
  --bg-secondary: #2a2c2e;
  --text-primary: #e8e5ec;
  --text-secondary: #b8b5c0;
  --text-muted: #8a8891;
  --border-color: #3d3f42;
  --accent-color: #8b6fc7;
  --accent-color-light: #ac8af6;
  --accent-secondary: #ff5ca0;
  --hover-bg: #313638;
  --shadow: rgba(106, 76, 147, 0.2);
}

::selection {
  background: #6a4c93;
  color: white;
  text-shadow: none;
}

::-moz-selection {
  background: #6a4c93;
  color: white;
  text-shadow: none;
}

:target{
  background-color: var(--accent-color-light);
}

body {
  font-family: 'Georgia', 'Times New Roman', Times, serif;
  line-height: 1.7;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  transition: background-color 0.3s ease, color 0.3s ease;
  font-size: 16px;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Georgia', 'Times New Roman', Times, serif;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 0.5em;
}

h1 {
  font-size: 2.5rem;
}

h2 {
  font-size: 2rem;
}

h3 {
  font-size: 1.5rem;
}

b {
  color: var(--accent-secondary);
}


.header {
  border-bottom: 1px solid var(--border-color);
  padding: 1rem 0;
  position: relative;
  top: 0;
  background-color: var(--bg-primary);
  z-index: 100;
  transition: background-color 0.3s ease;
}

.header__content {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.header__logo {
  pointer-events: none;
}


@keyframes fade-out-text {
  0% {
    opacity: 1;
  }
  100% {
    opacity: 0;
    visibility: hidden;
  }
}

@keyframes fade-in-text {
  0% {
    opacity: 0;
  }
  100% {
    opacity: 1;
  }
}

.header__logo-wrapper-home {
  position: relative;
  display: inline-block;
}

.header__logo-icon-link {
  text-decoration: none;
  display: flex;
}

.header__logo--animated {
  animation: slide-logo 3s ease-in-out, fade-to-white 1s ease-in 3s forwards, fade-out-text 1s ease-in 5s forwards;
}

.header__title--static {
  opacity: 0;
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  animation: fade-in-text 1s ease-in 5.0s forwards;
}

.header__title {
  font-size: 1.5rem;
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 700;
  letter-spacing: -0.5px;
  font-family: 'Neurath', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
}

.header__title:hover {
  color: var(--accent-color);
}


.header__controls {
  display: flex;
  gap: 1rem;
  align-items: end;
}

.header__home-link {
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 0.95rem;
  padding: 0.4rem 0.8rem;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  transition: all 0.2s ease;
}

.header__home-link:hover {
  background-color: var(--hover-bg);
  color: var(--text-primary);
}

.header__theme-toggle {
  background: none;
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  cursor: pointer;
  padding: 0.4rem 0.8rem;
  border-radius: 4px;
  font-size: 1.2rem;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}

.header__theme-toggle:hover {
  background-color: var(--hover-bg);
}


.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 2rem 1rem;
}


.posts {
  display: flex;
  flex-direction: column;
  gap: 3rem;
}

.posts__item {
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 2rem;
}

.posts__item:last-child,
.posts__item:has(+ .load-more) {
  border-bottom: none;
}


.post__meta {
  display: flex;
  flex-wrap: wrap;
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
  gap: 0.5rem;
}

.post__meta-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.footer a:not(:last-child)::after,
.post__meta-item:not(:last-child)::after {
  content: "\2022";  /* • */
  color: var(--text-muted);
}

.post__title {
  color: var(--text-primary);
  text-decoration: none;
  display: block;
  margin-bottom: 0;
}

.post__title:hover {
  color: var(--accent-color);
}

.post__subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  font-style: italic;
  margin-bottom: 1rem;
  font-weight: 400;
}

.post__abstract {
  color: var(--text-secondary);
  margin-bottom: 1rem;
  line-height: 1.8;
}

.post__header {
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--border-color);
}

.post__content {
  max-width: 700px;
  margin: 0 auto;
}

.post__content p {
  margin-bottom: 1.2rem;
}

.post__content h2 {
  margin-top: 2rem;
  margin-bottom: 1rem;
}

.post__content h3 {
  margin-top: 1.5rem;
  margin-bottom: 0.8rem;
}

.post__content ul,
.post__content ol {
  margin-left: 2rem;
  margin-bottom: 1.2rem;
}

.post__content li {
  margin-bottom: 0.5rem;
}

.post__content blockquote {
  border-left: 4px solid var(--accent-color);
  padding-left: 1.5rem;
  margin: 1.5rem 0;
  font-style: italic;
  color: var(--text-secondary);
}

.post__content code {
  background-color: var(--bg-secondary);
  padding: 0.2rem 0.4rem;
  border-radius: 3px;
  font-family: 'Courier New', Courier, monospace;
  font-size: 0.9em;
}

.post__content pre {
  background-color: var(--bg-secondary);
  padding: 1rem;
  border-radius: 4px;
  overflow-x: auto;
  margin-bottom: 1.2rem;
}

.post__content pre code {
  background: none;
  padding: 0;
}

.post__content img {
  max-width: 100%;
  height: auto;
  margin: 1.5rem 0;
  border-radius: 4px;
}

.post__content a {
  color: #8b6fc7;
  text-decoration: underline;
  transition: color 0.2s ease;
}

.post__content a:hover {
  color: #6a4c93;
  text-decoration: underline;
}

.post__content a:visited {
  color: #5a3c83;
}

[data-theme="dark"] .post__content a:visited {
  color: var(--accent-secondary);
}

.post__footer {
  margin-top: 2rem;
  border-top: 1px solid var(--border-color);
  padding-top: 2rem;
}


.read-more {
  display: inline-block;
  color: var(--accent-color);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.5rem 0;
  transition: opacity 0.2s ease;
}

.read-more:hover {
  opacity: 0.7;
}

.read-more::after {
  content: " \2192"; /* → */
}


.go-back {
  color: var(--accent-color);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.5rem 0;
  transition: opacity 0.2s ease;
}

.go-back:hover {
  opacity: 0.7;
}

.go-back::before {
  content: "\2190";  /* ← */
}

.header__controls .go-back {
  padding: 0;
}


.footer {
  border-top: 1px solid var(--border-color);
  margin-top: 4rem;
  padding: 2rem;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.875rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem;
}
.footer a::after{
  margin-left: 0.5rem;
}

.footer a {
  text-decoration: none;
  color: var(--accent-color);
}



.loading {
  text-align: center;
  padding: 3rem 0;
  color: var(--text-muted);
}

.skeleton {
  opacity: 0.9;
  animation: skeleton-loading 1.5s ease-in-out infinite;
}

@keyframes skeleton-loading {
  0% {
    opacity: 0.9;
  }
  50% {
    opacity: 0.4;
  }
  100% {
    opacity: 0.9;
  }
}

.skeleton-item {
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 2rem;
}

.skeleton-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.skeleton-meta-item {
  height: 0.875rem;
  width: 80px;
  background-color: var(--bg-secondary);
  border-radius: 4px;
}

.skeleton-title {
  height: 1.75rem;
  width: 70%;
  background-color: var(--bg-secondary);
  border-radius: 4px;
  margin-bottom: 0.5rem;
}

.skeleton-subtitle {
  height: 1.25rem;
  width: 50%;
  background-color: var(--bg-secondary);
  border-radius: 4px;
  margin-bottom: 1rem;
}

.skeleton-abstract {
  height: 1rem;
  width: 100%;
  background-color: var(--bg-secondary);
  border-radius: 4px;
  margin-bottom: 0.5rem;
}

.skeleton-abstract:nth-child(4) {
  width: 85%;
}

.skeleton-abstract:nth-child(5) {
  width: 90%;
}

.skeleton-read-more {
  height: 1rem;
  width: 120px;
  background-color: var(--bg-secondary);
  border-radius: 4px;
  margin-top: 0.5rem;
}

.error {
  text-align: center;
  padding: 3rem 0;
  color: #c0392b;
}


.load-more {
  text-align: left;
  margin-top: 2rem;
}

.load-more__button {
  display: inline-block;
  color: var(--accent-color);
  background: none;
  border: none;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.5rem 0;
  cursor: pointer;
  transition: opacity 0.2s ease;
  font-family: inherit;
}

.load-more__button:hover {
  opacity: 0.7;
}

.load-more__button::before {
  content: "[";
  margin-right: 0.2rem;
}

.load-more__button::after {
  content: "...]";
  margin-left: 0.2rem;
}


.simple-slider {
  position: relative;
  margin: 2rem 0;
  padding: 1.25rem;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  background: var(--bg-secondary);
  box-shadow: 0 10px 22px var(--shadow);
}

.simple-slider__slide {
  display: none;
}

.simple-slider__slide.is-active {
  display: block;
  animation: simple-slider-fade 200ms ease-in;
}

.simple-slider__slide img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 8px;
  cursor: zoom-in;
}

.simple-slider__controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 1rem;
}

.simple-slider__button {
  padding: 0.5rem 1rem;
  border-radius: 999px;
  border: 1px solid var(--border-color);
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: 0.9rem;
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.simple-slider__button:hover,
.simple-slider__button:focus-visible {
  background: var(--accent-color);
  color: #fff;
  border-color: var(--accent-color);
}

.simple-slider__status {
  flex: 1;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

@keyframes simple-slider-fade {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

.simple-slider__overlay {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: clamp(1.5rem, 4vw, 3rem);
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(2px);
  z-index: 999;
  opacity: 0;
  pointer-events: none;
  transition: opacity 160ms ease-in;
}

.simple-slider__overlay.is-visible {
  opacity: 1;
  pointer-events: auto;
}

.simple-slider__overlay-content {
  position: relative;
  max-width: min(960px, 96vw);
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  outline: none;
}

.simple-slider__overlay-image {
  width: 100%;
  max-height: 80vh;
  object-fit: contain;
  border-radius: 12px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.45);
}

.simple-slider__overlay-caption {
  color: #f5f5f5;
  font-size: 0.95rem;
  text-align: center;
}

.simple-slider__overlay-close {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  border: none;
  border-radius: 999px;
  padding: 0.35rem 0.75rem;
  background: rgba(0, 0, 0, 0.55);
  color: #ffffff;
  font-size: 0.85rem;
  cursor: pointer;
  transition: background-color 0.2s ease, transform 0.2s ease;
}

.simple-slider__overlay-close:hover,
.simple-slider__overlay-close:focus-visible {
  background: rgba(0, 0, 0, 0.8);
  transform: scale(1.05);
}

.simple-slider code {
  background-color: #2a2c2e;
}

.simple-slider__legend {
  margin: 0.75rem 0 0;
  padding-left: 1.5rem;
  list-style: disc;
}

.simple-slider__legend-item {
  margin-bottom: 0.5rem;
}

.simple-slider__legend-sublist {
  margin-top: 0.35rem;
  padding-left: 1.25rem;
}

.simple-slider__legend-subitem {
  margin-bottom: 0.35rem;
}

.simple-slider__code {
  font-family: var(--font-mono, "Fira Code", "Source Code Pro", Consolas, monospace);
  font-size: 0.95em;
  color: #e3e0e0;
}

.simple-slider__code--notability-red {
  color: #ff4d4f;
}

.simple-slider__code--notability-yellow {
  color: #fadb14;
}

.simple-slider__code--notability-fuchsia {
  color: #eb2f96;
}

.simple-slider__code--notability-orange {
  color: #fa8c16;
}

.simple-slider__code--notability-rose {
  color: #d46b90;
}

.simple-slider__code--notability-sky {
  color: #69c0ff;
}


/* ── Tables ── */
.post__content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.9em;
}

.post__content table th {
  padding: 0.6em 0.75em;
  text-align: left;
  white-space: nowrap;
  background: var(--bg-secondary);
  color: var(--text-primary);
  border-bottom: 2px solid var(--border-color);
  font-weight: 700;
}

.post__content table td {
  padding: 0.5em 0.75em;
  color: var(--text-primary);
}

.post__content table tbody tr:nth-child(odd) {
  background: var(--hover-bg);
}

.post__content table tbody tr:nth-child(even) {
  background: var(--bg-primary);
}

.post__content table tbody tr:hover {
  background: var(--border-color);
}


@media (max-width: 768px) {
  body {
    font-size: 15px;
  }

  h1 {
    font-size: 2rem;
  }

  h2 {
    font-size: 1.5rem;
  }

  h3 {
    font-size: 1.25rem;
  }

  .header__content {
    padding: 0 0.75rem;
  }

  .header__title {
    font-size: 1.25rem;
  }

  .container {
    padding: 1.5rem 0.75rem;
  }

  .posts {
    gap: 2rem;
  }

  .posts__item {
    padding-bottom: 1.5rem;
  }

  .post__meta {
    font-size: 0.8rem;
    gap: 0.4rem;
  }

  .post__meta-item {
    gap: 0.4rem;
  }

  .header__home-link {
    font-size: 0.85rem;
    padding: 0.35rem 0.7rem;
  }

  .header__theme-toggle {
    padding: 0.35rem 0.7rem;
    font-size: 1.1rem;
  }

  .simple-slider {
    padding: 1rem;
  }

  .simple-slider__controls {
    flex-direction: column;
    gap: 0.75rem;
  }

  .simple-slider__button {
    width: 100%;
  }

  .simple-slider__overlay {
    padding: 1rem;
  }

  .simple-slider__overlay-caption {
    font-size: 0.85rem;
  }
}

@media (max-width: 480px) {
  .header__controls {
    gap: 0.5rem;
  }

  .header__home-link span {
    display: none;
  }

  .header__home-link::before {
    content: "←";
  }
}