/* ============================================================
   ChargeHub Design System v2.0
   Principal UX — All Interaction States, Tokens, Components
   ============================================================ */

/* ── FONT DISPLAY SWAP FOR WEB FONTS ─────────────────────── */
@font-face {
  font-family: "Font Awesome 6 Free";
  font-display: swap;
}
@font-face {
  font-family: "Font Awesome 6 Brands";
  font-display: swap;
}

/* ── ANIMATION KEYFRAMES ─────────────────────────────────── */
@keyframes ch-fade-in       { from{opacity:0;transform:translateY(12px)} to{opacity:1;transform:translateY(0)} }
@keyframes ch-fade-in-left  { from{opacity:0;transform:translateX(-20px)} to{opacity:1;transform:translateX(0)} }
@keyframes ch-scale-in      { from{opacity:0;transform:scale(0.92)} to{opacity:1;transform:scale(1)} }
@keyframes ch-shimmer       { 0%{background-position:-400px 0} 100%{background-position:400px 0} }
@keyframes ch-spin          { to{transform:rotate(360deg)} }
@keyframes ch-pulse-ring    { 0%{transform:scale(0.8);opacity:1} 100%{transform:scale(2.2);opacity:0} }
@keyframes ch-bounce-arrow  { 0%,100%{transform:translateY(0)} 50%{transform:translateY(5px)} }
@keyframes ch-glow-pulse    { 0%,100%{box-shadow:0 0 0 0 rgba(0,200,83,.35)} 50%{box-shadow:0 0 0 8px rgba(0,200,83,0)} }
@keyframes ch-bar-grow      { from{height:0} to{height:var(--bar-h,60px)} }
@keyframes ch-count-up      { from{opacity:0;transform:translateY(6px)} to{opacity:1;transform:translateY(0)} }

/* ── GLOBAL ENTER ANIMATIONS ─────────────────────────────── */
.ch-anim-fade   { animation: ch-fade-in      .55s cubic-bezier(.22,1,.36,1) both }
.ch-anim-left   { animation: ch-fade-in-left .55s cubic-bezier(.22,1,.36,1) both }
.ch-anim-scale  { animation: ch-scale-in     .45s cubic-bezier(.22,1,.36,1) both }
.ch-anim-d1     { animation-delay:.1s }
.ch-anim-d2     { animation-delay:.2s }
.ch-anim-d3     { animation-delay:.3s }
.ch-anim-d4     { animation-delay:.4s }
.ch-anim-d5     { animation-delay:.5s }

/* ── SKELETON LOADING ────────────────────────────────────── */
.ch-skeleton {
  background: linear-gradient(90deg,var(--gray-100) 25%,var(--gray-200) 50%,var(--gray-100) 75%);
  background-size: 400px 100%;
  animation: ch-shimmer 1.4s infinite linear;
  border-radius: var(--radius-md);
}
[data-theme="dark"] .ch-skeleton {
  background: linear-gradient(90deg,#1e293b 25%,#334155 50%,#1e293b 75%);
  background-size: 400px 100%;
}

/* ── SPINNER ─────────────────────────────────────────────── */
.ch-spinner {
  width: 18px; height: 18px;
  border: 2.5px solid rgba(255,255,255,.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: ch-spin .7s linear infinite;
  display: inline-block; vertical-align: middle;
}
.ch-spinner--dark {
  border-color: rgba(0,200,83,.25);
  border-top-color: var(--primary);
}

/* ── STATUS BADGES ───────────────────────────────────────── */
.ch-status {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 12px; border-radius: var(--radius-full);
  font-size: .75rem; font-weight: 650; letter-spacing: .3px;
  text-transform: capitalize;
}
.ch-status::before {
  content: ''; width: 7px; height: 7px; border-radius: 50%;
  flex-shrink: 0;
}
.ch-status--available  { background: rgba(16,185,129,.12); color: #059669; }
.ch-status--available::before  { background: #10b981; box-shadow: 0 0 6px #10b981; }
.ch-status--occupied   { background: rgba(245,158,11,.12);  color: #d97706; }
.ch-status--occupied::before   { background: #f59e0b; }
.ch-status--offline    { background: rgba(239,68,68,.12);   color: #dc2626; }
.ch-status--offline::before    { background: #ef4444; }
.ch-status--coming-soon{ background:rgba(99,102,241,.12); color:#6366f1; }
.ch-status--coming-soon::before{ background:#6366f1; }

/* ── CONNECTOR TYPE BADGES ───────────────────────────────── */
.ch-connector {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 3px 10px; border-radius: var(--radius-full);
  font-size: .72rem; font-weight: 600;
  background: var(--gray-100); color: var(--text-secondary);
  border: 1px solid var(--border-light);
  transition: border-color var(--transition-fast), color var(--transition-fast), background-color var(--transition-fast);
}
.ch-connector:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-50); }
.ch-connector--ccs1  { --c-col:#3b82f6; }
.ch-connector--nacs  { --c-col:#00C853; }
.ch-connector--j1772 { --c-col:#f59e0b; }
.ch-connector--chademo{ --c-col:#8b5cf6; }
.ch-connector--ccs1,
.ch-connector--nacs,
.ch-connector--j1772,
.ch-connector--chademo { border-color: var(--c-col); color: var(--c-col); background: color-mix(in srgb, var(--c-col) 8%, transparent); }

/* ── BUTTON SYSTEM (All States) ──────────────────────────── */
.ch-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-family: var(--font-family); font-weight: 600; font-size: .95rem;
  padding: 11px 24px; border-radius: var(--radius-lg);
  border: 1.5px solid transparent; cursor: pointer;
  transition: transform .2s cubic-bezier(.4,0,.2,1), box-shadow .2s ease, background-color .2s ease, border-color .2s ease, color .2s ease;
  text-decoration: none; white-space: nowrap; user-select: none;
  position: relative; overflow: hidden;
}
.ch-btn::after {
  content: ''; position: absolute; inset: 0;
  background: white; opacity: 0;
  transition: opacity .15s;
}
.ch-btn:active::after { opacity: .08; }

/* Primary */
.ch-btn--primary {
  background: var(--primary); color: #fff;
  box-shadow: 0 4px 14px rgba(0,200,83,.28);
}
.ch-btn--primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 20px rgba(0,200,83,.35); color:#fff; }
.ch-btn--primary:focus-visible { outline: 3px solid rgba(0,200,83,.45); outline-offset: 3px; }
.ch-btn--primary:active { transform: translateY(0) scale(.98); }
.ch-btn--primary:disabled, .ch-btn--primary[aria-disabled="true"] {
  background: var(--gray-300); color: var(--gray-500);
  box-shadow: none; cursor: not-allowed; transform: none;
  pointer-events: none;
}
.ch-btn--primary.is-loading { pointer-events: none; gap: 10px; }

/* Secondary / Outline */
.ch-btn--outline {
  background: transparent; color: var(--primary);
  border-color: var(--primary);
}
.ch-btn--outline:hover { background: var(--primary); color: #fff; transform: translateY(-2px); box-shadow: 0 6px 16px rgba(0,200,83,.25); }
.ch-btn--outline:focus-visible { outline: 3px solid rgba(0,200,83,.4); outline-offset: 3px; }
.ch-btn--outline:active { transform: scale(.98); }
.ch-btn--outline:disabled { border-color: var(--gray-300); color: var(--gray-400); pointer-events: none; }

/* Ghost */
.ch-btn--ghost {
  background: transparent; color: var(--text-secondary);
  border-color: var(--border-dark);
}
.ch-btn--ghost:hover { background: var(--gray-100); color: var(--text-primary); border-color: var(--gray-300); }
.ch-btn--ghost:focus-visible { outline: 3px solid var(--gray-300); outline-offset: 3px; }

/* Danger */
.ch-btn--danger {
  background: #ef4444; color: #fff;
  box-shadow: 0 4px 14px rgba(239,68,68,.25);
}
.ch-btn--danger:hover { background: #dc2626; transform: translateY(-2px); color:#fff; }

/* Sizes */
.ch-btn--sm { padding: 7px 16px; font-size: .82rem; border-radius: var(--radius-md); }
.ch-btn--lg { padding: 15px 32px; font-size: 1.05rem; border-radius: 14px; }
.ch-btn--icon { padding: 10px; aspect-ratio: 1; border-radius: var(--radius-md); }

/* ── INPUT SYSTEM (All States) ───────────────────────────── */
.ch-input-group { display: flex; flex-direction: column; gap: 6px; }
.ch-label {
  font-size: .85rem; font-weight: 600;
  color: var(--text-primary); display: flex; align-items: center; gap: 6px;
}
.ch-label .required { color: #ef4444; }
.ch-input {
  width: 100%; padding: 12px 16px;
  background: var(--bg-primary); color: var(--text-primary);
  border: 1.5px solid var(--border-dark);
  border-radius: var(--radius-lg); font-size: .95rem;
  font-family: var(--font-family);
  transition: border-color .2s, box-shadow .2s;
  outline: none;
}
.ch-input::placeholder { color: var(--text-tertiary); }
.ch-input:hover  { border-color: var(--gray-400); }
.ch-input:focus  { border-color: var(--primary); box-shadow: 0 0 0 4px var(--primary-50); }
.ch-input.is-error  { border-color: #ef4444; box-shadow: 0 0 0 4px rgba(239,68,68,.12); }
.ch-input.is-success{ border-color: #10b981; box-shadow: 0 0 0 4px rgba(16,185,129,.12); }
.ch-input:disabled  { background: var(--gray-100); color: var(--text-tertiary); cursor: not-allowed; }

.ch-hint   { font-size: .78rem; color: var(--text-tertiary); }
.ch-error-msg { font-size: .78rem; color: #ef4444; display: flex; align-items: center; gap: 4px; }
.ch-success-msg{ font-size: .78rem; color: #10b981; display: flex; align-items: center; gap: 4px; }

/* Input with icon */
.ch-input-icon-wrap { position: relative; }
.ch-input-icon-wrap .ch-input { padding-left: 44px; }
.ch-input-icon-wrap .ch-input-icon {
  position: absolute; left: 14px; top: 50%; transform: translateY(-50%);
  color: var(--text-tertiary); pointer-events: none; font-size: .95rem;
}
.ch-input-icon-wrap .ch-input:focus ~ .ch-input-icon { color: var(--primary); }

/* ── CARD SYSTEM ─────────────────────────────────────────── */
.ch-card {
  background: var(--bg-primary);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  padding: var(--spacing-lg);
  transition: box-shadow .25s, border-color .25s, transform .25s;
}
.ch-card--interactive:hover {
  box-shadow: var(--shadow-lg);
  border-color: rgba(0,200,83,.2);
  transform: translateY(-4px);
}
.ch-card--glass {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-color: var(--glass-border);
  box-shadow: var(--glass-shadow);
}

/* ── STATION CARD ─────────────────────────────────────────── */
.ch-station-card {
  background: var(--bg-primary);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: transform .2s cubic-bezier(.4,0,.2,1), box-shadow .2s ease, border-color .2s ease;
  display: flex; flex-direction: column;
  position: relative;
}
.ch-station-card:hover {
  box-shadow: 0 16px 40px -12px rgba(0,0,0,.12);
  border-color: rgba(0,200,83,.25);
  transform: translateY(-5px);
}
.ch-station-card__img {
  width: 100%; height: 180px;
  object-fit: cover; display: block;
}
.ch-station-card__body  { padding: 16px 20px; flex: 1; }
.ch-station-card__footer{ padding: 12px 20px; border-top: 1px solid var(--border-light); display: flex; align-items: center; justify-content: space-between; }
.ch-station-card__name  { font-size: 1rem; font-weight: 700; color: var(--text-primary); margin-bottom: 4px; }
.ch-station-card__addr  { font-size: .82rem; color: var(--text-tertiary); margin-bottom: 10px; display: flex; align-items: center; gap: 5px; }
.ch-station-card__meta  { display: flex; gap: 12px; margin-bottom: 10px; flex-wrap: wrap; }
.ch-station-card__meta-item { font-size: .8rem; color: var(--text-secondary); display: flex; align-items: center; gap: 4px; }
.ch-station-card__meta-item i { color: var(--primary); }
.ch-station-card__fav {
  position: absolute; top: 12px; right: 12px;
  width: 34px; height: 34px; border-radius: 50%;
  background: rgba(255,255,255,.9); border: none; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  color: var(--text-tertiary); font-size: .95rem;
  transition: transform .2s ease, color .2s ease, background-color .2s ease; backdrop-filter: blur(8px);
}
.ch-station-card__fav:hover { color: #ef4444; transform: scale(1.1); }
.ch-station-card__fav.active { color: #ef4444; background: rgba(239,68,68,.1); }

/* ── EMPTY STATE ─────────────────────────────────────────── */
.ch-empty {
  display: flex; flex-direction: column; align-items: center;
  justify-content: center; text-align: center;
  padding: 64px 32px; gap: 16px;
}
.ch-empty__icon {
  width: 80px; height: 80px; border-radius: 50%;
  background: var(--gray-100); color: var(--text-tertiary);
  font-size: 2rem; display: flex; align-items: center; justify-content: center;
  margin-bottom: 8px;
}
.ch-empty__title { font-size: 1.25rem; font-weight: 700; color: var(--text-primary); margin: 0; }
.ch-empty__desc  { font-size: .9rem; color: var(--text-secondary); max-width: 320px; margin: 0; }

/* ── TOAST NOTIFICATIONS ─────────────────────────────────── */
.ch-toast-stack {
  position: fixed; bottom: 24px; right: 24px; z-index: 9999;
  display: flex; flex-direction: column; gap: 10px; max-width: 360px;
}
.ch-toast {
  display: flex; align-items: flex-start; gap: 12px;
  padding: 14px 18px; border-radius: 14px;
  box-shadow: 0 8px 32px rgba(0,0,0,.14);
  background: var(--bg-primary);
  border: 1px solid var(--border-light);
  animation: ch-fade-in .35s cubic-bezier(.22,1,.36,1) both;
  pointer-events: all; position: relative;
}
.ch-toast__icon { font-size: 1.1rem; flex-shrink: 0; padding-top: 1px; }
.ch-toast__body { flex: 1; }
.ch-toast__title{ font-size: .875rem; font-weight: 700; color: var(--text-primary); margin: 0 0 2px; }
.ch-toast__desc { font-size: .8rem; color: var(--text-secondary); margin: 0; }
.ch-toast__close{ background: none; border: none; cursor: pointer; color: var(--text-tertiary); font-size: .8rem; padding: 2px; }
.ch-toast--success { border-color: rgba(16,185,129,.3); }
.ch-toast--success .ch-toast__icon { color: #10b981; }
.ch-toast--error   { border-color: rgba(239,68,68,.3); }
.ch-toast--error   .ch-toast__icon { color: #ef4444; }
.ch-toast--warning { border-color: rgba(245,158,11,.3); }
.ch-toast--warning .ch-toast__icon { color: #f59e0b; }
.ch-toast--info    { border-color: rgba(59,130,246,.3); }
.ch-toast--info    .ch-toast__icon { color: #3b82f6; }

/* ── MODAL ───────────────────────────────────────────────── */
.ch-modal-backdrop {
  position: fixed; inset: 0; z-index: var(--z-modal-backdrop);
  background: rgba(0,0,0,.55); backdrop-filter: blur(4px);
  display: flex; align-items: center; justify-content: center;
  padding: 20px; animation: ch-fade-in .2s ease both;
}
.ch-modal {
  background: var(--bg-primary); border-radius: 24px;
  box-shadow: 0 32px 80px rgba(0,0,0,.22);
  width: 100%; max-width: 540px; max-height: 90vh;
  overflow-y: auto; animation: ch-scale-in .28s cubic-bezier(.22,1,.36,1) both;
}
.ch-modal__header {
  padding: 24px 28px 0;
  display: flex; align-items: center; justify-content: space-between;
}
.ch-modal__title { font-size: 1.2rem; font-weight: 700; color: var(--text-primary); margin: 0; }
.ch-modal__close {
  width: 32px; height: 32px; border-radius: 50%; border: none;
  background: var(--gray-100); cursor: pointer; color: var(--text-secondary);
  display: flex; align-items: center; justify-content: center;
  transition: background-color .2s ease, color .2s ease;
}
.ch-modal__close:hover { background: var(--gray-200); color: var(--text-primary); }
.ch-modal__body   { padding: 20px 28px; }
.ch-modal__footer { padding: 0 28px 24px; display: flex; gap: 10px; justify-content: flex-end; }

/* ── TOOLTIP ─────────────────────────────────────────────── */
[data-ch-tooltip] { position: relative; }
[data-ch-tooltip]::after {
  content: attr(data-ch-tooltip);
  position: absolute; bottom: calc(100% + 8px); left: 50%; transform: translateX(-50%);
  background: var(--gray-900); color: #fff;
  font-size: .75rem; font-weight: 500; padding: 5px 10px;
  border-radius: 8px; white-space: nowrap; pointer-events: none;
  opacity: 0; transition: opacity .18s;
  z-index: var(--z-tooltip);
}
[data-ch-tooltip]:hover::after { opacity: 1; }

/* ── PROGRESS / CHARGE BAR ───────────────────────────────── */
.ch-progress {
  height: 8px; background: var(--gray-100); border-radius: var(--radius-full); overflow: hidden;
}
.ch-progress__fill {
  height: 100%; border-radius: var(--radius-full);
  background: linear-gradient(90deg, var(--primary), var(--accent));
  transition: width .6s cubic-bezier(.4,0,.2,1);
}
.ch-progress--sm { height: 5px; }
.ch-progress--lg { height: 12px; }

/* ── RATINGS ─────────────────────────────────────────────── */
.ch-stars { display: inline-flex; gap: 2px; color: #f59e0b; font-size: .9rem; }
.ch-stars--sm { font-size: .72rem; }
.ch-stars--lg { font-size: 1.2rem; }
.ch-rating-count { font-size: .8rem; color: var(--text-tertiary); margin-left: 5px; }

/* ── SECTION HEADER SYSTEM ───────────────────────────────── */
.ch-section-header { text-align: center; margin-bottom: 56px; }
.ch-section-header--left { text-align: left; }
.ch-eyebrow {
  display: inline-flex; align-items: center; gap: 7px;
  font-size: .72rem; font-weight: 700; letter-spacing: 1.5px; text-transform: uppercase;
  color: var(--primary); background: rgba(0,200,83,.08);
  border: 1px solid rgba(0,200,83,.15);
  padding: 5px 14px; border-radius: var(--radius-full); margin-bottom: 18px;
}
.ch-heading-xl {
  font-size: clamp(2rem, 4vw, 2.75rem); font-weight: 800;
  letter-spacing: -.5px; line-height: 1.18; color: var(--text-primary); margin: 0 0 16px;
}
.ch-subheading {
  font-size: 1.05rem; color: var(--text-secondary);
  line-height: 1.65; max-width: 580px; margin: 0 auto;
}
.ch-section-header--left .ch-subheading { margin: 0; }

/* ── DIVIDER ─────────────────────────────────────────────── */
.ch-divider {
  height: 1px; background: var(--border-light); margin: 0; border: none;
}

/* ── BREADCRUMB ──────────────────────────────────────────── */
.ch-breadcrumb {
  display: flex; align-items: center; gap: 6px;
  font-size: .82rem; color: var(--text-tertiary); flex-wrap: wrap;
}
.ch-breadcrumb a { color: var(--text-tertiary); text-decoration: none; transition: color .18s; }
.ch-breadcrumb a:hover { color: var(--primary); }
.ch-breadcrumb .sep { color: var(--border-dark); font-size: .7rem; }
.ch-breadcrumb .current { color: var(--text-primary); font-weight: 500; }

/* ── AVATAR ──────────────────────────────────────────────── */
.ch-avatar {
  border-radius: 50%; object-fit: cover; display: block;
  background: var(--gray-200); color: var(--text-secondary);
  display: flex; align-items: center; justify-content: center; font-weight: 700;
}
.ch-avatar--sm  { width: 32px; height: 32px; font-size: .8rem; }
.ch-avatar--md  { width: 44px; height: 44px; font-size: 1rem; }
.ch-avatar--lg  { width: 64px; height: 64px; font-size: 1.4rem; }
.ch-avatar--xl  { width: 88px; height: 88px; font-size: 1.8rem; }
.ch-avatar--ring { border: 3px solid var(--bg-primary); box-shadow: 0 0 0 2px var(--primary); }

/* ── STATS COUNTER ───────────────────────────────────────── */
.ch-stat-block { text-align: center; }
.ch-stat-block .val {
  font-size: clamp(1.8rem,3vw,2.6rem); font-weight: 800;
  color: var(--text-primary); line-height: 1;
  background: linear-gradient(135deg,var(--primary),var(--secondary));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.ch-stat-block .lbl {
  font-size: .82rem; color: var(--text-secondary);
  font-weight: 500; margin-top: 6px;
}

/* ── TAG / CHIP ──────────────────────────────────────────── */
.ch-tag {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 4px 12px; border-radius: var(--radius-full);
  font-size: .78rem; font-weight: 600;
  background: var(--gray-100); color: var(--text-secondary);
  border: 1px solid var(--border-light);
  cursor: default; user-select: none; transition: background-color .18s ease, color .18s ease, border-color .18s ease;
}
.ch-tag--active, .ch-tag:hover  { background: var(--primary-50); color: var(--primary); border-color: rgba(0,200,83,.3); }
.ch-tag--sm { padding: 2px 8px; font-size: .7rem; }

/* ── FOCUS RING GLOBAL ───────────────────────────────────── */
:focus-visible {
  outline: 2.5px solid rgba(0,200,83,.6);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ── RESPONSIVE UTILITIES ────────────────────────────────── */
@media (max-width: 768px) {
  .ch-heading-xl  { font-size: 1.85rem; }
  .ch-modal       { border-radius: 18px 18px 0 0; max-height: 95vh; align-self: flex-end; }
  .ch-modal-backdrop { align-items: flex-end; }
  .ch-toast-stack { left: 12px; right: 12px; bottom: 16px; max-width: none; }
  .ch-btn--lg     { padding: 13px 24px; font-size: 1rem; }
}

/* ── DARK MODE TOKENS ────────────────────────────────────── */
[data-theme="dark"] .ch-card,
[data-theme="dark"] .ch-station-card { background: var(--bg-tertiary); border-color: var(--border-light); }
[data-theme="dark"] .ch-input  { background: var(--bg-tertiary); border-color: var(--border-dark); color: var(--text-primary); }
[data-theme="dark"] .ch-empty__icon { background: var(--bg-tertiary); }
[data-theme="dark"] .ch-modal  { background: var(--bg-primary); }
[data-theme="dark"] .ch-modal__close { background: var(--bg-tertiary); }
[data-theme="dark"] .ch-progress { background: var(--bg-tertiary); }
[data-theme="dark"] .ch-tag    { background: var(--bg-tertiary); border-color: var(--border-dark); }
[data-theme="dark"] .ch-toast  { background: var(--bg-tertiary); border-color: var(--border-dark); }
[data-theme="dark"] .ch-station-card__fav { background: rgba(15,23,42,.9); color: var(--text-tertiary); }
[data-theme="dark"] .ch-skeleton { background-color: var(--bg-tertiary); }

/* ── ACCESSIBILITY & COLOR CONTRAST (WCAG AA) ───────────── */
.text-muted,
.text-secondary {
  color: #475569 !important; /* Slate-600: 5.9:1 contrast ratio against white (exceeds 4.5:1 minimum) */
}
[data-theme="dark"] .text-muted,
[data-theme="dark"] .text-secondary {
  color: #94a3b8 !important; /* Slate-400: 7.2:1 contrast ratio against dark backgrounds */
}