/* ==========================================================================
   BANGLADESH, THE YIN & YANG — STYLESHEET (styles.css)
   ========================================================================== */

/* YANG: OPTIMISM (Pure White, Delicate Editorial Theme) */
body.theme-optimism {
  --bg-primary: #ffffff;
  --bg-secondary: #f9fafb;
  --bg-card: #ffffff;
  --bg-elevated: #f3f4f6;
  --text-primary: #0f172a;
  --text-secondary: #334155;
  --text-muted: #64748b;
  --border-color: #e2e8f0;
  --border-hover: #0f172a;
  --accent-color: #006a4e;
  --accent-soft: #ecfdf5;
  --shadow-card: 0 4px 18px -2px rgba(15, 23, 42, 0.04);
  --shadow-hover: 0 14px 28px -4px rgba(15, 23, 42, 0.08);
  background-color: var(--bg-primary);
  color: var(--text-primary);
}

/* YIN: DESPAIR (Stark Dark, Contrary Accountability Theme) */
body.theme-despair {
  --bg-primary: #08080a;
  --bg-secondary: #101014;
  --bg-card: #121217;
  --bg-elevated: #1a1a22;
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #71717a;
  --border-color: #262630;
  --border-hover: #f8fafc;
  --accent-color: #f42a41;
  --accent-soft: rgba(244, 42, 65, 0.14);
  --shadow-card: 0 8px 24px -4px rgba(0, 0, 0, 0.75);
  --shadow-hover: 0 18px 36px -6px rgba(0, 0, 0, 0.92);
  background-color: var(--bg-primary);
  color: var(--text-primary);
}

body {
  font-family: 'Inter', 'Hind Siliguri', sans-serif;
  transition: background-color 0.45s cubic-bezier(0.16, 1, 0.3, 1),
              color 0.45s cubic-bezier(0.16, 1, 0.3, 1);
  overflow-x: hidden;
}

.serif-display {
  font-family: 'Cormorant Garamond', 'Noto Serif Bengali', Georgia, serif;
}

body.lang-bn .serif-display {
  font-family: 'Noto Serif Bengali', 'Cormorant Garamond', serif;
  line-height: 1.35;
}

.mono-meta {
  font-family: 'JetBrains Mono', 'Hind Siliguri', monospace;
}

/* Theme Utility Classes */
.theme-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-card);
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1),
              border-color 0.25s ease,
              box-shadow 0.25s ease,
              background-color 0.4s ease;
}

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

.theme-border { border: 1px solid var(--border-color); }
.theme-border-b { border-bottom: 1px solid var(--border-color); }
.theme-border-t { border-top: 1px solid var(--border-color); }
.theme-text-secondary { color: var(--text-secondary); }
.theme-text-muted { color: var(--text-muted); }
.theme-accent-text { color: var(--accent-color); }

.theme-pill {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  transition: all 0.2s ease;
}

.theme-pill:hover {
  border-color: var(--text-primary);
  color: var(--text-primary);
}

.theme-pill.active {
  background-color: var(--text-primary);
  color: var(--bg-primary);
  border-color: var(--text-primary);
}

.theme-input {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  transition: border-color 0.2s ease;
}

.theme-input:focus {
  border-color: var(--text-primary);
}

/* Yin-Yang Switcher Capsule */
.yinyang-Capsule {
  border: 1.5px solid var(--border-color);
  background-color: var(--bg-secondary);
  padding: 3px;
  border-radius: 9999px;
  display: inline-flex;
  align-items: center;
  gap: 2px;
}

.yy-side-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 9999px;
  font-size: 0.78rem;
  font-weight: 600;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.yy-side-btn.active-optimism {
  background-color: #ffffff;
  color: #09090b;
  box-shadow: 0 2px 8px rgba(0,0,0,0.12);
  border: 1px solid #d4d4d8;
}

.yy-side-btn.active-despair {
  background-color: #09090b;
  color: #ffffff;
  box-shadow: 0 2px 10px rgba(0,0,0,0.75);
  border: 1px solid #3f3f46;
}

.yy-center-wheel {
  width: 24px;
  height: 24px;
  transition: transform 0.7s cubic-bezier(0.34, 1.56, 0.64, 1);
  cursor: pointer;
}

body.theme-despair .yy-center-wheel {
  transform: rotate(180deg);
}

/* ==========================================================================
   FLOATING 3D 1996 BANGLADESHI 1 TAKA BRASS COIN (UPPER RIGHT)
   ========================================================================== */
.coin-float-wrapper {
  position: fixed;
  top: 76px;
  right: 22px;
  z-index: 48;
  user-select: none;
  cursor: pointer;
  animation: coinLevitate 3.8s ease-in-out infinite;
}

@keyframes coinLevitate {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-7px); }
}

.coin-3d-stage {
  width: 96px;
  height: 96px;
  perspective: 950px;
}

@media (max-width: 640px) {
  .coin-float-wrapper {
    top: 72px;
    right: 12px;
  }
  .coin-3d-stage {
    width: 74px;
    height: 74px;
  }
}

.coin-3d-rotor {
  width: 100%;
  height: 100%;
  position: relative;
  transform-style: preserve-3d;
  transition: transform 1.05s cubic-bezier(0.22, 1, 0.36, 1);
  border-radius: 50%;
}

/* Yang = Optimism (0deg Obverse), Yin = Despair (180deg Reverse) */
.coin-3d-rotor.is-yang {
  transform: rotateY(0deg) rotateZ(0deg);
}

.coin-3d-rotor.is-yin {
  transform: rotateY(180deg) rotateZ(0deg);
}

.coin-3d-rotor.flipping-to-yang {
  animation: flipToYang 1.05s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

.coin-3d-rotor.flipping-to-yin {
  animation: flipToYin 1.05s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

@keyframes flipToYang {
  0%   { transform: translateY(0) scale(1) rotateY(180deg) rotateX(0deg); }
  45%  { transform: translateY(-20px) scale(1.16) rotateY(540deg) rotateX(16deg); }
  100% { transform: translateY(0) scale(1) rotateY(1080deg) rotateX(0deg); }
}

@keyframes flipToYin {
  0%   { transform: translateY(0) scale(1) rotateY(0deg) rotateX(0deg); }
  45%  { transform: translateY(-20px) scale(1.16) rotateY(360deg) rotateX(-16deg); }
  100% { transform: translateY(0) scale(1) rotateY(900deg) rotateX(0deg); }
}

.coin-face {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  overflow: hidden;
  box-shadow:
    0 12px 26px -4px rgba(0, 0, 0, 0.42),
    0 0 0 2px rgba(212, 165, 32, 0.78),
    inset 0 0 10px rgba(255, 232, 130, 0.55);
}

.coin-face img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
  display: block;
}

/* Metallic sheen sweep across the real brass coin image during flip */
.coin-face::after {
  content: "";
  position: absolute;
  inset: -40%;
  background: linear-gradient(
    115deg,
    transparent 36%,
    rgba(255, 255, 255, 0.42) 50%,
    transparent 64%
  );
  transform: translateX(-85%) rotate(15deg);
  transition: transform 0.85s ease;
  pointer-events: none;
}

.coin-float-wrapper:hover .coin-face::after {
  transform: translateX(85%) rotate(15deg);
}

.coin-face-reverse {
  transform: rotateY(180deg);
}

/* Card Image Zoom */
.card-img-wrap { overflow: hidden; }
.card-img-wrap img { transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1); }
.theme-card:hover .card-img-wrap img { transform: scale(1.04); }

/* Modal Backdrop */
.modal-backdrop {
  background-color: rgba(0, 0, 0, 0.72);
  backdrop-filter: blur(5px);
}

/* ==========================================================================
   MINIMAL CHRONOLOGICAL DATE DIVIDERS
   ========================================================================== */
.date-divider {
  display: flex;
  align-items: center;
  gap: 14px;
  margin: 2.5rem 0 1.25rem 0;
}

.date-divider-title {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  white-space: nowrap;
}

.date-divider-sub {
  font-size: 0.72rem;
  color: var(--text-muted);
  white-space: nowrap;
}

.date-divider-rule {
  flex: 1;
  height: 1px;
  background-color: var(--border-color);
}

@keyframes cardFadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.article-enter {
  animation: cardFadeIn 0.35s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}