/* ═══════════════════════════════════════════════════════════
   RateAtlas – EV Charging Cost Calculator
   tools.rateatlas.org  •  app.css
   ═══════════════════════════════════════════════════════════ */
:root {
  --accent: #0b5ed7;
  --green: #059669;
  --bg: #f8fafc;
  --panel: #ffffff;
  --border: #dbe4f0;
  --text: #0f172a;
  --muted: #475569;
  --light: #f1f5f9;
  --danger: #dc2626;
  --warn: #b45309;
}
*, *::before, *::after { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font-family: "Avenir Next", "Montserrat", "Segoe UI", sans-serif; }

/* ── Container ── */
.ra-ev { max-width: 900px; margin: 0 auto; padding: 12px 14px 40px; }
.ra-ev section, .ra-ev h1, .ra-ev h2, .ra-ev h3, .ra-ev p, .ra-ev ul { margin: 0; }

/* ── Hero ── */
.hero { background: linear-gradient(135deg, #059669 0%, #0b5ed7 100%); border-radius: 16px; padding: 28px 24px 24px; color: #fff; position: relative; overflow: hidden; }
.hero::after { content: ""; position: absolute; right: -40px; top: -40px; width: 200px; height: 200px; background: rgba(255,255,255,0.06); border-radius: 50%; }
.hero h1 { font-size: clamp(1.5rem, 4vw, 2.2rem); line-height: 1.15; letter-spacing: -0.01em; }
.hero .sub { margin-top: 10px; opacity: 0.92; line-height: 1.55; font-size: 1rem; max-width: 60ch; }
.hero-nav { margin-top: 14px; display: flex; gap: 8px; flex-wrap: wrap; }
.hero-nav a { text-decoration: none; border-radius: 999px; padding: 7px 14px; font-weight: 700; font-size: 0.88rem; background: rgba(255,255,255,0.14); color: #fff; border: 1px solid rgba(255,255,255,0.22); backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px); transition: background .15s; }
.hero-nav a:hover { background: rgba(255,255,255,0.28); }

/* ── Accuracy indicator ── */
.accuracy-strip { margin-top: 14px; display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.level { display: flex; gap: 4px; }
.dot { display: inline-block; width: 38px; height: 6px; border-radius: 3px; background: rgba(255,255,255,0.25); transition: background .2s; }
.dot.on { background: #fff; }
.acc-label { font-size: 0.84rem; font-weight: 700; }

/* ── Cards ── */
.card { border: 1px solid var(--border); border-radius: 14px; background: var(--panel); padding: 18px 16px; margin-top: 14px; }
.card-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 12px; }
.card h2 { font-size: 1.1rem; }
.badge { font-size: 0.78rem; font-weight: 700; padding: 4px 10px; border-radius: 999px; background: #eff6ff; color: #1d4ed8; white-space: nowrap; }

/* ── Form ── */
.field { display: block; margin-bottom: 0; }
.field span { display: block; font-size: 0.82rem; font-weight: 700; margin-bottom: 5px; color: var(--muted); letter-spacing: 0.01em; }
input, select { font: inherit; width: 100%; border: 1px solid #cbd5e1; border-radius: 10px; padding: 9px 11px; background: #fff; font-size: 0.92rem; min-height: 42px; transition: border-color .15s, box-shadow .15s; }
input:focus, select:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(11,94,215,0.1); }
input.error { border-color: var(--danger); box-shadow: 0 0 0 3px rgba(239,68,68,0.1); }
.hint { color: var(--muted); font-size: 0.84rem; line-height: 1.4; margin-top: 6px; }
.hint.error { color: var(--danger); }
.hint.warn { color: var(--warn); }
.help { color: var(--muted); font-size: 0.84rem; line-height: 1.45; }

/* ── Grid layouts ── */
.g2 { display: grid; gap: 12px; grid-template-columns: 1fr 1fr; }
.g3 { display: grid; gap: 12px; grid-template-columns: 1fr 1fr 1fr; }
.g4 { display: grid; gap: 10px; grid-template-columns: repeat(4, 1fr); }

/* ── Buttons (transparent / glass) ── */
.btn { border: 0; border-radius: 999px; padding: 10px 16px; font: inherit; font-weight: 700; cursor: pointer; text-decoration: none; display: inline-flex; align-items: center; justify-content: center; font-size: 0.9rem; transition: transform .1s, background .15s, box-shadow .15s; backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px); }
.btn:active { transform: scale(0.97); }
.btn-primary { background: rgba(11,94,215,0.16); color: var(--accent); border: 1px solid rgba(11,94,215,0.26); }
.btn-primary:hover { background: rgba(11,94,215,0.28); box-shadow: 0 2px 8px rgba(11,94,215,0.15); }
.btn-green { background: rgba(5,150,105,0.16); color: var(--green); border: 1px solid rgba(5,150,105,0.26); }
.btn-green:hover { background: rgba(5,150,105,0.28); }
.btn-ghost { background: rgba(241,245,249,0.5); color: var(--text); border: 1px solid rgba(203,213,225,0.5); }
.btn-ghost:hover { background: rgba(241,245,249,0.85); }
.actions { margin-top: 14px; display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }

/* ── Chips ── */
.chips { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 8px; }
.chip { border: 1px solid #cbd5e1; background: #fff; color: var(--text); border-radius: 999px; padding: 5px 12px; font: inherit; font-size: 0.82rem; font-weight: 600; cursor: pointer; transition: all .15s; }
.chip:hover { border-color: var(--accent); }
.chip.on { background: var(--accent); border-color: var(--accent); color: #fff; }

/* ── Big result ── */
.results { margin-top: 16px; }
.big-number { text-align: center; padding: 18px 10px; background: linear-gradient(135deg, #eff6ff, #f0fdf4); border-radius: 14px; border: 1px solid #dbeafe; }
.big-number .v { font-size: clamp(1.8rem, 5vw, 2.6rem); font-weight: 900; color: var(--accent); line-height: 1.1; }
.big-number .k { font-size: 0.84rem; color: var(--muted); margin-top: 4px; }
.sub-metrics { margin-top: 10px; }
.metric { border: 1px solid #e2e8f0; border-radius: 10px; padding: 10px; background: var(--bg); }
.metric .k { color: var(--muted); font-size: 0.8rem; }
.metric .v { margin-top: 3px; font-weight: 800; font-size: 1.05rem; }

/* ── Schedule box ── */
.schedule-box { margin-top: 14px; background: #f0fdf4; border: 1px solid #bbf7d0; border-radius: 12px; padding: 14px 16px; display: flex; align-items: center; gap: 14px; }
.schedule-box .clock { font-size: 1.6rem; font-weight: 900; color: #059669; min-width: 80px; }
.schedule-box .explain { font-size: 0.88rem; color: #166534; line-height: 1.45; }

/* ── Source ── */
.source-line { margin-top: 10px; font-size: 0.82rem; color: #94a3b8; line-height: 1.4; }
.source-line a { color: var(--accent); }

/* ── Flash animation ── */
@keyframes ra-flash { 0% { box-shadow: 0 0 0 0 rgba(11,94,215,0.4); } 70% { box-shadow: 0 0 0 14px rgba(11,94,215,0); } 100% { box-shadow: 0 0 0 0 rgba(11,94,215,0); } }
.flash-result { animation: ra-flash 0.55s ease-out; }

/* ── Upgrade grid ── */
.upgrade-grid { display: grid; gap: 14px; grid-template-columns: 1fr 1fr; margin-top: 12px; }
.upgrade-option { border: 1px solid var(--border); border-radius: 12px; padding: 16px; background: #fff; position: relative; }
.upgrade-option .tag { position: absolute; top: -9px; right: 14px; background: var(--green); color: #fff; font-size: 0.72rem; font-weight: 700; padding: 3px 9px; border-radius: 999px; }
.upgrade-option h3 { font-size: 0.95rem; margin-bottom: 6px; }
.small-grid { display: grid; gap: 8px; grid-template-columns: 1fr 1fr; margin-top: 8px; }
.upload-zone { margin-top: 8px; border: 2px dashed #cbd5e1; border-radius: 10px; padding: 16px; text-align: center; cursor: pointer; transition: border-color .15s; }
.upload-zone:hover { border-color: var(--accent); }
.upload-zone input[type=file] { display: none; }
.upload-zone .icon { font-size: 1.5rem; margin-bottom: 4px; }
.upload-zone .uz-label { font-size: 0.86rem; font-weight: 700; color: var(--accent); }
.upload-zone .uz-sub { font-size: 0.78rem; color: var(--muted); margin-top: 2px; }

/* ── Details / summary ── */
details { margin-top: 14px; }
summary { cursor: pointer; font-weight: 800; color: var(--text); font-size: 0.95rem; padding: 8px 0; }
summary:hover { color: var(--accent); }
.small-summary { font-size: 0.82rem; color: var(--muted); font-weight: 600; }
.more-options { margin-top: 10px; }

/* ── Math table ── */
.math-table { width: 100%; border-collapse: collapse; margin-top: 8px; font-size: 0.88rem; }
.math-table th { text-align: left; padding: 6px 8px; background: var(--light); color: var(--muted); font-weight: 700; font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.04em; }
.math-table td { padding: 6px 8px; border-bottom: 1px solid #e2e8f0; }
.math-table td:last-child { font-weight: 700; text-align: right; }
.math-table .total-row { border-top: 2px solid var(--accent); }

/* ── SEO blocks ── */
.seo-blocks { display: grid; gap: 14px; grid-template-columns: 1fr 1fr 1fr; margin-top: 14px; }
.seo-block { border: 1px solid var(--border); border-radius: 12px; padding: 14px; background: #fff; }
.seo-block h3 { font-size: 0.92rem; margin-bottom: 6px; }
.seo-block p { font-size: 0.84rem; color: var(--muted); line-height: 1.45; }
.seo-block a { color: var(--accent); }

/* ── Responsive ── */
@media (max-width: 860px) {
  .g3, .seo-blocks { grid-template-columns: 1fr 1fr; }
  .g4 { grid-template-columns: 1fr 1fr; }
  .upgrade-grid { grid-template-columns: 1fr; }
}
@media (max-width: 600px) {
  .g2, .g3, .g4, .seo-blocks, .small-grid { grid-template-columns: 1fr; }
  .schedule-box { flex-direction: column; text-align: center; }
}