/* ── App Page (About) ─────────────────────────────────── */
.about-page {
  display: none;
  flex-direction: column;
  min-height: 100%;
  background: var(--gradient-bg-global);
  padding: 10px 20px;
  -webkit-tap-highlight-color: transparent;
  -webkit-overflow-scrolling: touch;
}

/* ── Hero Header ───────────────────────────────────────── */
.app-hero {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 40px;
  padding: 48px 24px 20px;
}

.app-hero-title-block {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 5px;
}

.app-hero-sub {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-regular);
  letter-spacing: var(--letter-spacing-normal);
  background: var(--gradient-secondary-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.2;
}

.app-hero-main {
  font-size: 96px;
  font-weight: 500;
  letter-spacing: -8px;
  line-height: 0.9;
  background: var(--gradient-primary-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  padding-right: 8px;
  padding-bottom: 5px;
}

.app-hero-info {
  font-size: 11px;
  font-weight: 400;
  letter-spacing: -0.3px;
  text-align: center;
  margin-bottom: 10px;
  background: linear-gradient(
    90deg,
    rgba(240, 245, 255, 0.9),
    rgba(180, 200, 255, 0.65)
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ── Search Bar ─────────────────────────────────────────── */
.app-search-wrap {
  display: flex;
  padding: 12px 20px 24px;
  justify-content: center;
  align-items: center;
}

.app-search-bar {
  display: flex;
  align-items: center;
  align-self: center;
  gap: var(--space-md);
  background: rgba(0, 9, 26, 0.35);
  border: 0.5px solid var(--border-color-light);
  border-radius: 10px;
  padding: 13px 20px;
  backdrop-filter: var(--glass-blur-lg);
  transition: var(--transition-fast);
  max-width: 280px;
}

.app-search-bar:focus-within {
  border-color: var(--border-color-dark);
  background: rgba(0, 9, 26, 0.5);
  box-shadow: var(--shadow-glow-sm);
}

.app-search-icon {
  width: 16px;
  height: 16px;
  opacity: var(--opacity-icon-medium);
  flex-shrink: 0;
}

.app-search-input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  font-size: var(--font-size-xl);
  color: var(--color-accent-light);
  font-family: var(--font-family-primary);
  letter-spacing: var(--letter-spacing-normal);
  font-family: "Gellix", sans-serif;
}

.app-search-input::placeholder {
  color: rgba(255, 255, 255, 0.35);
}

/* ── Boards Wrapper ─────────────────────────────────────── */
.about-wrapper {
  display: flex;
  flex-direction: column;
  flex: 1;
  padding: 10px 20px;
  gap: 7px;
}

/* ── Board Item ─────────────────────────────────────────── */
.about-board-item {
  display: flex;
  flex-direction: column;
  border-radius: var(--radius-2xl);
  overflow: hidden;
  border: 0.5px solid rgba(107, 158, 255, 0.08);
  background: rgba(10, 14, 39, 0.6);
  transition: border-color 0.2s ease;
  padding: 0;
}

.about-board-item.hidden {
  display: none;
}

/* ── Board Trigger (card face) ──────────────────────────── */
.about-board {
  width: 100%;
  aspect-ratio: 180 / 100;
  cursor: pointer;
  display: flex;
  align-items: flex-end;
  justify-content: flex-start;
  position: relative;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

.about-board-item.expanded .about-board {
  border-bottom: var(--border-width) solid var(--border-color-light);
  aspect-ratio: auto;
  padding: 18px 20px;
}

.about-board-title {
  position: relative;
  z-index: 2;
  font-size: 13px;
  font-weight: var(--font-weight-regular);
  letter-spacing: var(--letter-spacing-normal);
  padding: 20px;
  background: var(--gradient-tertiary-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ── Board Content (max-height accordion — no display toggling = no flicker) ── */
.about-board-content {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  padding: 0 20px;
  will-change: opacity;
  transition:
    max-height 0.3s ease,
    opacity 0.25s ease,
    padding 0.3s ease;
}

/* Expanded state — large enough max-height so all content fits */
.about-board-item.expanded .about-board-content {
  max-height: 2000px;
  opacity: 1;
  padding: 20px;
}

.about-content-title {
  font-size: 8px;
  font-weight: var(--font-weight-bold);
  letter-spacing: var(--letter-spacing-loose);
  margin-bottom: 10px;
  background: var(--gradient-secondary-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-transform: uppercase;
}

.about-content-description {
  color: rgba(200, 215, 255, 0.75);
  font-size: 10px;
  line-height: 1.75;
  letter-spacing: var(--letter-spacing-loose);
}

/* ── Responsive — Tablet (768px+) ── */
@media (min-width: 768px) {
  .about-page {
    padding: 10px 32px;
  }

  .app-hero {
    padding: 48px 40px 24px;
    max-width: 900px;
    margin: 0 auto;
  }

  .app-hero-main {
    font-size: 120px;
    letter-spacing: -10px;
  }

  .app-search-wrap {
    max-width: 900px;
    margin: 0 auto;
    padding: 12px 40px 24px;
  }
}

/* ── Responsive — Desktop (1024px+) ── */
@media (min-width: 1024px) {
  .about-page {
    padding: 10px 48px;
  }

  .app-hero {
    max-width: 1000px;
    padding: 56px 48px 28px;
  }

  .app-hero-main {
    font-size: 144px;
    letter-spacing: -12px;
  }

  .app-search-wrap {
    max-width: 1000px;
    padding: 12px 48px 24px;
  }
}