/* ChargeIndex.eu — dark theme with electric-cyan accent
   ------------------------------------------------------ */

:root {
  /* Core palette */
  --bg:            #0a0e0c;
  --bg-elev:       #111815;
  --bg-elev-2:     #161d1a;
  --border:        #1f2a25;
  --border-strong: #2a3a33;

  --text:          #e8efec;
  --text-muted:    #8a9a93;
  --text-dim:      #5e6b65;

  /* Accent — electric mint/cyan, feels "electrical" without screaming */
  --accent:        #00e5a0;
  --accent-soft:   rgba(0, 229, 160, 0.14);
  --accent-glow:   rgba(0, 229, 160, 0.35);

  --danger:        #ff6b6b;
  --positive:      #00e5a0;

  /* Typography */
  --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', ui-monospace, monospace;

  /* Layout */
  --container: 1160px;
  --radius:    14px;
  --radius-sm: 10px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  min-height: 100vh;
  background:
    radial-gradient(1200px 600px at 85% -10%, rgba(0, 229, 160, 0.08), transparent 60%),
    radial-gradient(900px 500px at -10% 10%, rgba(0, 180, 255, 0.05), transparent 60%),
    var(--bg);
}

a { color: inherit; text-decoration: none; }
a:hover { color: var(--accent); }

h1, h2, h3 { font-weight: 600; letter-spacing: -0.02em; margin: 0; }
h1 { font-size: clamp(2rem, 4.5vw, 3.25rem); line-height: 1.1; }
h2 { font-size: 1.6rem; }
h3 { font-size: 1.15rem; }
p  { margin: 0; }

.muted { color: var(--text-muted); }
.small { font-size: 0.875rem; }
.mono  { font-family: var(--font-mono); }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

/* ---------- Header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: rgba(10, 14, 12, 0.72);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  height: 64px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  letter-spacing: -0.01em;
  font-size: 1.05rem;
  color: var(--text);
}
.brand:hover { color: var(--text); }
.brand-mark {
  width: 26px;
  height: 26px;
  fill: var(--accent);
  filter: drop-shadow(0 0 10px var(--accent-glow));
}
.brand-accent { color: var(--accent); }
.brand.small { font-size: 0.95rem; }
.brand.small .brand-mark { width: 20px; height: 20px; }

.site-nav {
  display: flex;
  gap: 24px;
  margin-left: 24px;
  font-size: 0.92rem;
  color: var(--text-muted);
}
.site-nav a { transition: color 0.15s ease; }

.country-flags {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 999px;
}

.flag-btn {
  position: relative;
  appearance: none;
  border: 0;
  padding: 0;
  margin: 0;
  width: 34px;
  height: 24px;
  border-radius: 5px;
  overflow: hidden;
  cursor: pointer;
  background: transparent;
  display: block;
  transition: transform 0.18s ease, filter 0.18s ease, opacity 0.18s ease, box-shadow 0.18s ease;
  outline-offset: 2px;
}

.flag-btn svg {
  display: block;
  width: 100%;
  height: 100%;
}

.flag-btn:not(.is-disabled):hover {
  transform: translateY(-1px);
}

.flag-btn:not(.is-disabled):focus-visible {
  outline: 2px solid var(--accent);
}

.flag-btn.is-active {
  box-shadow:
    0 0 0 2px var(--bg-elev),
    0 0 0 3px var(--accent),
    0 0 18px -2px var(--accent-glow);
}

.flag-btn.is-disabled {
  cursor: not-allowed;
  filter: grayscale(0.85) brightness(0.6);
  opacity: 0.55;
}
.flag-btn.is-disabled:hover {
  filter: grayscale(0.6) brightness(0.75);
  opacity: 0.85;
}

/* Tooltip for disabled flags */
.flag-btn[data-tooltip] {
  --tt-bg: var(--bg-elev-2);
}
.flag-btn[data-tooltip]::after,
.flag-btn[data-tooltip]::before {
  position: absolute;
  left: 50%;
  top: calc(100% + 10px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.15s ease, transform 0.15s ease;
  transform: translate(-50%, -4px);
  z-index: 40;
}
.flag-btn[data-tooltip]::after {
  content: attr(data-tooltip);
  background: var(--tt-bg);
  color: var(--text);
  border: 1px solid var(--border-strong);
  padding: 5px 10px;
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  white-space: nowrap;
  text-transform: none;
  box-shadow: 0 6px 20px rgba(0,0,0,0.5);
}
.flag-btn[data-tooltip]::before {
  content: "";
  top: calc(100% + 4px);
  width: 8px;
  height: 8px;
  background: var(--tt-bg);
  border-left: 1px solid var(--border-strong);
  border-top: 1px solid var(--border-strong);
  transform: translate(-50%, -4px) rotate(45deg);
}
.flag-btn[data-tooltip]:hover::after,
.flag-btn[data-tooltip]:hover::before,
.flag-btn[data-tooltip]:focus-visible::after,
.flag-btn[data-tooltip]:focus-visible::before {
  opacity: 1;
  transform: translate(-50%, 0);
}
.flag-btn[data-tooltip]:hover::before,
.flag-btn[data-tooltip]:focus-visible::before {
  transform: translate(-50%, 0) rotate(45deg);
}

/* ---------- Hero ---------- */

.hero {
  padding: 56px 0 48px;
  border-bottom: 1px solid var(--border);
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 56px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--bg-elev);
  margin-bottom: 22px;
}
.live-dot {
  width: 8px; height: 8px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 0 0 var(--accent-glow);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%   { box-shadow: 0 0 0 0 var(--accent-glow); }
  70%  { box-shadow: 0 0 0 10px rgba(0, 229, 160, 0); }
  100% { box-shadow: 0 0 0 0 rgba(0, 229, 160, 0); }
}

.lede {
  margin-top: 20px;
  font-size: 1.12rem;
  color: var(--text-muted);
  max-width: 560px;
}
.lede .mono { color: var(--text); }

.hero-stat {
  background: linear-gradient(180deg, var(--bg-elev), var(--bg-elev-2));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  position: relative;
  overflow: hidden;
}
.hero-stat::before {
  content: "";
  position: absolute;
  inset: -1px;
  background: linear-gradient(135deg, var(--accent-soft), transparent 40%);
  pointer-events: none;
  border-radius: inherit;
}
.stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.stat-value {
  margin-top: 12px;
  display: flex;
  align-items: baseline;
  gap: 4px;
  font-family: var(--font-mono);
  font-weight: 500;
  color: var(--accent);
  font-size: clamp(2.5rem, 5vw, 3.6rem);
  line-height: 1;
  letter-spacing: -0.02em;
}
.stat-value .currency {
  font-size: 0.55em;
  color: var(--text-muted);
  margin-right: 2px;
}
.stat-value .unit {
  font-size: 0.38em;
  color: var(--text-muted);
  margin-left: 8px;
  letter-spacing: 0;
}
.stat-meta {
  margin-top: 18px;
  display: flex;
  gap: 12px;
  align-items: center;
  font-size: 0.92rem;
  color: var(--text-muted);
}
.delta {
  font-family: var(--font-mono);
  padding: 3px 8px;
  border-radius: 6px;
  background: var(--bg-elev-2);
}
.delta.up   { color: var(--danger);   background: rgba(255, 107, 107, 0.1); }
.delta.down { color: var(--positive); background: var(--accent-soft); }
.sep { color: var(--text-dim); }

/* ---------- Sections ---------- */

.section {
  padding: 48px 0;
  border-bottom: 1px solid var(--border);
}
.section + .section { padding-top: 48px; }
#ranking { padding-top: 40px; }
.section:last-of-type { border-bottom: none; }

.section-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 24px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}
.section-head .muted { margin-top: 6px; font-size: 0.95rem; }

.card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

/* ---------- Range toggle ---------- */

.range-toggle,
.filter-toggle {
  display: inline-flex;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 4px;
}
.range-toggle button,
.filter-toggle button {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--text-muted);
  font: 500 0.85rem var(--font-sans);
  padding: 6px 14px;
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.15s ease;
  letter-spacing: 0.04em;
}
.range-toggle button:hover,
.filter-toggle button:hover { color: var(--text); }
.range-toggle button[aria-selected="true"],
.filter-toggle button[aria-selected="true"] {
  background: var(--accent);
  color: #04120c;
  font-weight: 600;
}

/* Fixed width per pill so bold vs regular doesn't shift neighbours. */
.filter-toggle button {
  font-variant-numeric: tabular-nums;
  min-width: 52px;
  text-align: center;
  box-sizing: border-box;
}

/* ---------- Chart ---------- */

.chart-card { padding: 24px; }
.chart-wrap {
  position: relative;
  height: 360px;
}
.chart-footer {
  margin-top: 14px;
  font-size: 0.85rem;
}

/* ---------- Ranking table ---------- */

.table-wrap { overflow-x: auto; }

.ranking-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}
.ranking-table th,
.ranking-table td {
  padding: 16px 20px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}
.ranking-table thead th {
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  background: var(--bg-elev-2);
  border-bottom: 1px solid var(--border-strong);
}
.ranking-table tbody tr {
  transition: background 0.12s ease;
}
.ranking-table tbody tr:hover {
  background: rgba(255,255,255,0.015);
}
.ranking-table tbody tr:last-child td { border-bottom: none; }

.ranking-table td { vertical-align: middle; }
.col-rank  { width: 56px; color: var(--text-dim); font-family: var(--font-mono); }
.col-op    { font-weight: 600; }
.col-op .op-name-short { display: none; }
.col-price { font-family: var(--font-mono); color: var(--accent); width: 160px; white-space: nowrap; }
.col-price .price-avg { line-height: 1.2; }
.col-price .price-range {
  font-size: 0.72rem;
  color: var(--text-dim);
  margin-top: 3px;
  letter-spacing: 0.02em;
}
.col-cps   { color: var(--text-muted); width: 140px; font-variant-numeric: tabular-nums; }
.col-bar   { width: 28%; min-width: 160px; }

.rank-1 .col-rank { color: var(--accent); font-weight: 700; }
.rank-1 .col-op::before {
  content: "★ ";
  color: var(--accent);
  margin-right: 2px;
}

.price-bar {
  position: relative;
  height: 6px;
  background: var(--bg-elev-2);
  border-radius: 999px;
  overflow: hidden;
}
.price-bar-fill {
  position: absolute;
  inset: 0 auto 0 0;
  background: linear-gradient(90deg, var(--accent), #00c6ff);
  border-radius: 999px;
  transition: width 0.6s ease;
}

.empty-row td {
  text-align: center;
  color: var(--text-muted);
  padding: 40px 20px;
  border-bottom: none;
}

.ranking-meta { font-size: 0.88rem; }

.ranking-controls {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 8px;
}
.filter-label {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-dim);
}

/* ---------- About ---------- */

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
}
.about-grid p { margin-top: 14px; color: var(--text-muted); }
.about-grid h3 { margin-bottom: 10px; }

.method-list {
  margin: 0;
  padding: 0;
  list-style: none;
  color: var(--text-muted);
}
.method-list li {
  padding: 10px 0 10px 24px;
  border-bottom: 1px solid var(--border);
  position: relative;
}
.method-list li:last-child { border-bottom: none; }
.method-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 18px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 10px var(--accent-glow);
}

/* ---------- Reports ---------- */

.reports-section .section-head { margin-bottom: 28px; }

.reports-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 28px;
  padding: 32px 32px 28px;
  background: linear-gradient(180deg, var(--bg-elev), #0d1613);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.reports-card::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  background: radial-gradient(120% 60% at 100% 0%, rgba(0, 229, 160, 0.07), transparent 60%);
}

.reports-groups {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  position: relative;
}
.reports-groups::before {
  content: "";
  position: absolute;
  top: 6px;
  bottom: 6px;
  left: 50%;
  width: 1px;
  background: var(--border);
  transform: translateX(-0.5px);
}

.reports-group {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.reports-group-title {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 600;
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: flex-start;
  color: var(--text);
}

.reports-tag {
  display: inline-block;
  padding: 4px 10px;
  font: 600 0.68rem var(--font-sans);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--bg-elev-2);
  color: var(--text-muted);
}
.reports-tag-free {
  color: var(--accent);
  border-color: rgba(0, 229, 160, 0.35);
  background: rgba(0, 229, 160, 0.08);
}
.reports-tag-paid {
  color: var(--text-dim);
}

.plan-features {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  color: var(--text-muted);
  font-size: 0.94rem;
  line-height: 1.5;
  flex: 1 1 auto;
}
.plan-features li {
  position: relative;
  padding-left: 22px;
}
.plan-features li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 10px var(--accent-glow);
  opacity: 0.85;
}

.plan-form {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
  align-items: stretch;
  position: relative;
}
.plan-form input[type="email"] {
  appearance: none;
  width: 100%;
  background: var(--bg-elev-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 11px 18px;
  font: 400 0.95rem var(--font-sans);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.plan-form input[type="email"]:focus-visible {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.plan-form .btn-primary { white-space: nowrap; }
.plan-form .btn-primary[aria-busy="true"] {
  position: relative;
  color: transparent;
}
.plan-form .btn-primary[aria-busy="true"]::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 16px;
  height: 16px;
  margin: -8px 0 0 -8px;
  border: 2px solid currentColor;
  border-top-color: transparent;
  border-radius: 50%;
  color: #04120c;
  animation: plan-spin 0.7s linear infinite;
}
@keyframes plan-spin { to { transform: rotate(360deg); } }

.plan-hint {
  grid-column: 1 / -1;
  font-size: 0.82rem;
  margin: 4px 0 0;
}
.plan-hint.is-success { color: var(--accent); }
.plan-hint.is-error   { color: #ff7a7a; }

/* ---------- Contact ---------- */

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 56px;
  align-items: start;
}

.contact-intro p { margin-top: 14px; }

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-field label {
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  color: var(--text);
  font: 400 0.98rem/1.5 var(--font-sans);
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  transition: border-color 0.15s ease, box-shadow 0.15s ease, background-color 0.15s ease;
}
.contact-form textarea {
  padding: 14px 16px;
  border-radius: var(--radius);
  resize: vertical;
  min-height: 140px;
  font-family: var(--font-sans);
}
.contact-form input::placeholder,
.contact-form textarea::placeholder {
  color: var(--text-dim);
  font-style: normal;
}
.contact-form input:hover,
.contact-form textarea:hover {
  border-color: var(--border-strong);
}
.contact-form input:focus-visible,
.contact-form textarea:focus-visible {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
  background: var(--bg-elev-2);
}
.contact-form input[aria-invalid="true"],
.contact-form textarea[aria-invalid="true"] {
  border-color: var(--danger);
  box-shadow: 0 0 0 3px rgba(255, 107, 107, 0.15);
}

@media (max-width: 520px) {
  .form-row { grid-template-columns: 1fr; }
}

.contact-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.contact-hint {
  font-size: 0.82rem;
}

.btn-primary {
  appearance: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--accent);
  color: #04120c;
  border: 0;
  padding: 11px 22px;
  font: 600 0.95rem var(--font-sans);
  letter-spacing: 0.01em;
  border-radius: 999px;
  cursor: pointer;
  transition: transform 0.12s ease, box-shadow 0.15s ease, background-color 0.15s ease;
  box-shadow: 0 0 0 0 var(--accent-glow);
}
.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 28px -8px var(--accent-glow);
}
.btn-primary:active { transform: translateY(0); }
.btn-primary:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.btn-primary svg { display: block; }

.btn-primary:disabled {
  opacity: 0.75;
  cursor: not-allowed;
}
.btn-primary:disabled:hover {
  transform: none;
  box-shadow: 0 0 0 0 var(--accent-glow);
}

.spinner {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 2px solid rgba(4, 18, 12, 0.25);
  border-top-color: #04120c;
  animation: spin 0.7s linear infinite;
}
@keyframes spin {
  to { transform: rotate(360deg); }
}

.contact-hint.is-error   { color: var(--danger); }
.contact-hint.is-success { color: var(--accent); }

.contact-form.is-sent textarea {
  opacity: 0.7;
}

@media (max-width: 880px) {
  .contact-grid { grid-template-columns: 1fr; gap: 28px; }
  .contact-actions { justify-content: flex-end; }
}

/* ---------- Footer ---------- */

.site-footer {
  padding: 32px 0 40px;
  border-top: 1px solid var(--border);
  background: var(--bg-elev);
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* ---------- Responsive ---------- */

@media (max-width: 880px) {
  .hero { padding: 40px 0 32px; }
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .site-nav { display: none; }
  .section { padding: 56px 0; }
  .about-grid { grid-template-columns: 1fr; gap: 32px; }
  /* Center the ranking filter controls on mobile so they don't jump as the
     active pill's bold weight changes the cluster's width. */
  .ranking-controls { align-items: center; text-align: center; width: 100%; }
  .reports-card { padding: 26px 22px; gap: 24px; }
  .reports-groups { grid-template-columns: 1fr; gap: 28px; }
  .reports-groups::before { display: none; }
  .plan-form { grid-template-columns: 1fr; }
  .chart-wrap { height: 280px; }
  .ranking-table th, .ranking-table td { padding: 12px 14px; }
  .col-bar { display: none; }
  /* On mobile, swap to the truncated operator name so price stays visible
     without horizontal scroll. */
  .col-op .op-name-full  { display: none; }
  .col-op .op-name-short { display: inline; }
  .col-cps   { width: auto; }
  .col-price { width: auto; }
}

@media (max-width: 520px) {
  .header-inner { height: 56px; gap: 12px; }
  .brand-name { font-size: 0.95rem; }
  .country-flags { gap: 5px; padding: 3px; }
  .flag-btn { width: 28px; height: 20px; }
}