@keyframes fadeIn {
  0% {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

/* Root variables for reuse */
:root {
  --deepred: #900;
  --iconsize: clamp(0.82rem, 2.5vw, 1.1em);
  --text-md: clamp(1rem, 2.5vw, 1.3em);
  --text-lg: clamp(1.4rem, 8vw, 2rem);
  --text-xlg: clamp(2rem, 16vw, 4rem);
}

html {
  font-size: 16px;
}

h4,
p {
  font-size: var(--text-md);
  line-height: 1.6;
  color: #000;
}

h4 {
  color: #900;
}

img {
  max-width: 70%;
  height: auto;
}

.image-lightbox,
h1 {
  position: fixed;
  width: 100%;
}

.image-lightbox {
  top: 0;
  left: 0;
  height: 100%;
  background: rgba(0, 0, 0, 0.8);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 2000;
}

.image-lightbox img {
  max-width: 90%;
  max-height: 90%;
  border-radius: 10px;
  box-shadow: 0 4px 10px rgba(255, 255, 255, 0.3);
}

.image-lightbox.active {
  display: flex;
  animation: fadeIn 0.3s ease-in-out;
}

.image-lightbox .close-btn {
  position: absolute;
  top: 20px;
  right: 20px;
  font-size: 24px;
  color: #fff;
  cursor: pointer;
  background: rgba(0, 0, 0, 0.5);
  padding: 5px 10px;
  border-radius: 5px;
}

.click-to-enlarge {
  cursor: pointer;
  transition: transform 0.2s;
}

.click-to-enlarge:hover {
  transform: scale(1.05);
}

/* ─── Rail + Bar ───────────────────────────────────────────────────── */
.progress-container {
  position: fixed;
  top: 0;
  left: 10px;
  width: 14px; /* a bit wider to fit circles */
  height: 100vh;
  background: #eee;
  border-radius: 7px; /* pill shape */
  z-index: 1200;
  cursor: pointer;
}
.progress-bar {
  position: absolute;
  top: 0; /* ← fill from the top */
  width: 100%;
  height: 0;
  background: #3498db;
  border-radius: 0 0 7px 7px; /* round the bottom corners */
  transition: height 0.1s ease-out;
}

/* ─── Marker + Label ───────────────────────────────────────────────── */
.marker {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  width: 10px;
  height: 10px;
  background: #009;
  border: 3px solid white;
  border-radius: 50%;
  box-shadow: 0 0 4px rgba(0, 0, 0, 0.2);
}
.marker-label {
  position: absolute;
  white-space: nowrap;
  background: #009;
  color: white;
  font-size: 14px;
  font-weight: bold;
  padding: 4px 8px;
  border-radius: 4px;
  transform: translateY(-50%);
  left: calc(100% + 12px);
}

.marker-sub #table {
  color: #31008f;
  font-size: 18px;
}

h1 {
  font-family: "Trattatello";
  font-size: var(--text-xlg);
  margin: 0;
  text-align: center;
  top: 64px;
  left: 50%;
  transform: translateX(-50%);
  z-index: -10;
  transition: opacity 0.5s ease-out;
  max-width: 84%;
  line-height: 1.1;
}

h1,
h2,
h3 {
  color: var(--deepred);
}

h2 {
  font-size: var(--text-lg);
}

h3 {
  font-size: clamp(1.2rem, 6vw, 1.7rem);
}

body,
header {
  display: flex;
  flex-direction: column;
}

body {
  font-family: "Cuatro", sans-serif;
  margin: 0;
  padding: 0;
  align-items: center;
  height: 100%;
  overflow-x: hidden;
}

header {
  background-color: rgba(255, 255, 255, 0.92);
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
  font-size: var(--iconsize);
  padding: 8px 20px;
  width: 82%;
  position: fixed;
  border-radius: 12px;
  top: 0;
  z-index: 1000;
}

a:not(.no-resize) {
  font-size: clamp(1rem, 2.5vw, 1.3em);
}

.nav-list {
  list-style: none;
  display: flex;
  justify-content: space-around;
  padding: 0;
  margin: 0;
}

.nav-list li a {
  text-decoration: none;
  color: #000;
  font-weight: 400;
  transition: color 0.3s;
}

.nav-list li a:hover {
  font-weight: 700;
  color: #0063ff;
}

.about-link::before,
.homes-link::before,
.journal-link::before,
.sources-link::before {
  display: inline-block;
  width: var(--iconsize);
  height: var(--iconsize);
  background-size: contain;
  background-position: center;
  margin-right: 4px;
  vertical-align: bottom;
}

.homes-link::before {
  content: "";
  background-image: url(18.svg);
}

.journal-link::before {
  content: "";
  background-image: url(pen.svg);
}

.sources-link::before {
  content: "";
  background-image: url(data.svg);
}

.about-link::before {
  content: "";
  background-image: url(users.svg);
}

.container {
  width: 80%;
  padding: 0.5rem clamp(20px, 4vw, 30px);
  background-color: #f6f6f6;
  border-radius: 15px;
  box-shadow:
    0 4px 10px rgba(0, 0, 0, 0.1),
    0 8px 20px rgba(0, 0, 0, 0.05);
  text-align: left;
  margin-top: 10px; /* Remove default top margin */
}

.container1 {
  margin-top: 150px;
}

/* Dark Mode Toggle */
.dark-mode {
  background-color: rgba(26, 26, 26, 0.96);
  color: #e6e6e6;
}

.dark-mode header {
  background-color: #1a1a1a;
  box-shadow:
    0 2px 5px rgba(118, 118, 118, 0.1),
    0 8px 20px rgba(151, 151, 151, 0.05);
}

.dark-mode .container {
  background-color: #1a1a1a;
  box-shadow: 0 4px 10px rgba(197, 197, 197, 0.1);
}

.dark-mode h1,
.dark-mode h2,
.dark-mode h3,
.dark-mode h4 {
  color: #e62444;
}

.dark-mode p,
.dark-mode a,
.dark-mode .nav-list li a {
  color: #e6e6e6;
}

.dark-mode .nav-list li a:hover {
  color: #428bff;
}

.dark-mode .homes-link::before {
  content: "";
  background-image: url(white-house.svg);
}

.dark-mode .journal-link::before {
  content: "";
  background-image: url(whitepen.svg);
}

.dark-mode .sources-link::before {
  content: "";
  background-image: url(white-box.svg);
}

.dark-mode .about-link::before {
  content: "";
  background-image: url(whiteusers.svg);
}

.dark-mode #table {
  color: #b394f7;
}

/* Dark Mode Toggle Button */
.toggle-dark-mode {
  font-size: 24px;
  top: 70px;
  right: 10px;
  position: fixed;
  background-color: #4b4b4b;
  color: #f6f6f6;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
  transition:
    background-color 0.3s,
    color 0.3s;
}

.toggle-dark-mode:hover {
  background-color: #646464;
  color: #1f1f1f;
}

/* Responsive 📱*/
@media (max-width: 620px) {
  .progress-container {
    left: 0;
    width: 14px; /* a bit wider to fit circles */
    background: #eee;
  }

  img {
    max-width: 100%;
    height: auto;
  }

  a.index_text i,
  p {
    font-size: 18px;
  }

  h1 {
    font-size: clamp(1.4rem, 18vw, 3.6rem);
    top: 26px;
    line-height: 1;
  }

  .toggle-dark-mode {
    top: 26px;
    right: 10px;
  }

  header {
    top: auto;
    bottom: 0;
    padding: 12px;
    width: 100%;
    background-color: #fff;
    font-size: 0.8rem;
    box-shadow: 0-2px 5px rgba(0, 0, 0, 0.1);
    transition: all 0.4s linear;
    z-index: 1400;
  }

  header.shrink {
    padding: 0;
    font-size: 0;
  }

  .about-link::before,
  .homes-link::before,
  .journal-link::before,
  .sources-link::before {
    transition: all 0.2s linear;
    width: 1.6rem;
    height: 1.6rem;
  }

  header.shrink .about-link::before,
  header.shrink .homes-link::before,
  header.shrink .journal-link::before,
  header.shrink .sources-link::before {
    width: 0;
    height: 0;
  }

  .nav-list a {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-decoration: none;
    color: inherit;
    font-size: inherit;
  }
}