/**
 * Cascade Nexus — Animations
 * All @keyframes, transitions, and animation utilities.
 */

/* ─── Page Transitions ───────────────────────────────────────────────── */
@keyframes pageEnter {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

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

.page.active {
  animation: pageEnter 0.4s cubic-bezier(0.16, 1, 0.3, 1) both;
}

.page-exit {
  animation: pageExit 0.25s cubic-bezier(0.16, 1, 0.3, 1) both;
  pointer-events: none;
}

/* ─── Fade ───────────────────────────────────────────────────────────── */
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes fadeOut {
  from { opacity: 1; }
  to   { opacity: 0; }
}

/* ─── Slide ──────────────────────────────────────────────────────────── */
@keyframes slideDown {
  from { opacity: 0; transform: translateY(-8px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

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

/* ─── Scale ──────────────────────────────────────────────────────────── */
@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.96); }
  to   { opacity: 1; transform: scale(1); }
}

/* ─── Card Hover ─────────────────────────────────────────────────────── */
.card {
  transition:
    transform 0.35s cubic-bezier(0.16, 1, 0.3, 1),
    box-shadow 0.35s cubic-bezier(0.16, 1, 0.3, 1),
    border-color 0.35s ease;
}

.card:hover {
  transform: translateY(-3px);
}

/* ─── Sidebar Transitions ────────────────────────────────────────────── */
.sidebar {
  transition: left 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.nav-items {
  transition:
    max-height 0.4s cubic-bezier(0.16, 1, 0.3, 1),
    opacity 0.3s ease;
}

.nav-section-header .toggle-icon {
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

.nav-item {
  transition:
    color 0.25s ease,
    background 0.25s ease,
    border-color 0.25s ease;
}

/* ─── Button Ripple ──────────────────────────────────────────────────── */
.btn {
  position: relative;
  overflow: hidden;
}

.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at var(--rx, 50%) var(--ry, 50%), rgba(255,255,255,0.15) 0%, transparent 60%);
  opacity: 0;
  transition: opacity 0.4s ease;
  pointer-events: none;
}

.btn:active::after {
  opacity: 1;
}

/* ─── Search Overlay ─────────────────────────────────────────────────── */
.search-overlay {
  transition: opacity 0.3s ease;
}

.search-overlay.open {
  animation: fadeIn 0.25s ease;
}

.search-input-wrapper input {
  transition:
    border-color 0.3s ease,
    box-shadow 0.3s ease,
    background 0.3s ease;
}

/* ─── Chart Bars ─────────────────────────────────────────────────────── */
@keyframes barGrow {
  from { transform: scaleY(0); }
  to   { transform: scaleY(1); }
}

.chart-bars .bar {
  transform-origin: bottom;
  animation: barGrow 0.6s cubic-bezier(0.16, 1, 0.3, 1) both;
}

/* ─── Map Dots ───────────────────────────────────────────────────────── */
@keyframes pulseGlow {
  0%, 100% { opacity: 0.5; transform: scale(1); }
  50%      { opacity: 1; transform: scale(1.3); }
}

.map-dot {
  animation: pulseGlow 3s ease-in-out infinite;
}

/* ─── Theme Switch ───────────────────────────────────────────────────── */
.theme-transition *,
.theme-transition *::before,
.theme-transition *::after {
  transition:
    background 0.4s ease,
    color 0.3s ease,
    border-color 0.4s ease,
    box-shadow 0.4s ease,
    background-color 0.4s ease !important;
}

/* ─── Loading Skeleton ───────────────────────────────────────────────── */
@keyframes shimmer {
  0%   { background-position: -200% center; }
  100% { background-position: 200% center; }
}

.skeleton {
  background: linear-gradient(
    90deg,
    var(--border) 25%,
    var(--border-light) 50%,
    var(--border) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s ease-in-out infinite;
  border-radius: 6px;
}

.skeleton-text {
  height: 14px;
  margin-bottom: 8px;
}

.skeleton-text:last-child {
  width: 60%;
}

/* ─── Flagged Card Hover ─────────────────────────────────────────────── */
.flagged-card {
  transition:
    transform 0.3s cubic-bezier(0.16, 1, 0.3, 1),
    box-shadow 0.3s ease,
    border-color 0.3s ease;
}

.flagged-card:hover {
  transform: translateX(4px);
}

/* ─── Forecast Card ──────────────────────────────────────────────────── */
.forecast-card {
  transition:
    transform 0.3s cubic-bezier(0.16, 1, 0.3, 1),
    box-shadow 0.3s ease,
    border-color 0.3s ease;
}

.forecast-card:hover {
  transform: translateY(-4px);
}

/* ─── Article Preview ────────────────────────────────────────────────── */
.article-preview {
  transition: opacity 0.25s ease, padding-left 0.3s ease;
}

.article-preview:hover {
  opacity: 0.75;
  padding-left: 4px;
}

/* ─── Filter Chips ───────────────────────────────────────────────────── */
.filter-chip {
  transition:
    all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

/* ─── Card Borders ───────────────────────────────────────────────────── */
.card::after {
  transition: opacity 0.35s ease;
}

/* ─── Project Cards ──────────────────────────────────────────────────── */
.project-card {
  transition:
    transform 0.35s cubic-bezier(0.16, 1, 0.3, 1),
    box-shadow 0.35s ease,
    border-color 0.35s ease;
}

.project-card:hover {
  transform: translateY(-2px);
}

/* ─── Smooth Scrolling ───────────────────────────────────────────────── */
html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
}