:root {
  --accent: #6366f1;
  --accent2: #a855f7;
  --electricity: #f59e0b;
  --gas: #fb5a6b;
  --water: #0ea5e9;
  --green: #22c55e;
  --radius: 18px;
  --radius-sm: 12px;
  --font: 'Plus Jakarta Sans', 'Segoe UI', system-ui, sans-serif;
}

:root,
[data-theme="light"] {
  --bg: #f3f5fb;
  --bg2: #eaeefb;
  --bg-glow: #dfe6ff;
  --panel: rgba(255, 255, 255, 0.72);
  --panel-solid: #ffffff;
  --panel-border: rgba(30, 41, 68, 0.08);
  --text: #1c2333;
  --text-dim: #6b7690;
  --input-bg: rgba(30, 41, 68, 0.04);
  --shadow: 0 12px 32px -8px rgba(30, 41, 82, 0.16);
  --shadow-soft: 0 4px 14px rgba(30, 41, 82, 0.08);
  --grid-line: rgba(30, 41, 68, 0.07);
  --scrollbar: rgba(30, 41, 68, 0.18);
}

[data-theme="dark"] {
  --bg: #0a0f1c;
  --bg2: #111a2e;
  --bg-glow: #1c2a4d;
  --panel: rgba(23, 33, 56, 0.7);
  --panel-solid: #161f38;
  --panel-border: rgba(148, 168, 224, 0.14);
  --text: #eef1fa;
  --text-dim: #93a1bd;
  --input-bg: rgba(255, 255, 255, 0.05);
  --shadow: 0 14px 36px -10px rgba(0, 0, 0, 0.55);
  --shadow-soft: 0 6px 18px rgba(0, 0, 0, 0.35);
  --grid-line: rgba(148, 168, 224, 0.09);
  --scrollbar: rgba(148, 168, 224, 0.25);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { color-scheme: light dark; }

body {
  font-family: var(--font);
  background:
    radial-gradient(1100px 550px at 85% -12%, var(--bg-glow) 0%, transparent 55%),
    radial-gradient(900px 500px at -10% 10%, color-mix(in srgb, var(--accent) 12%, transparent) 0%, transparent 50%),
    linear-gradient(160deg, var(--bg2), var(--bg));
  background-attachment: fixed;
  color: var(--text);
  min-height: 100vh;
  padding-bottom: 40px;
  transition: background-color 0.3s ease, color 0.3s ease;
  -webkit-font-smoothing: antialiased;
}

::selection { background: color-mix(in srgb, var(--accent) 35%, transparent); }

/* ---- scrollbar ---- */
::-webkit-scrollbar { height: 8px; width: 8px; }
::-webkit-scrollbar-thumb { background: var(--scrollbar); border-radius: 8px; }

header {
  padding: 20px 18px 6px;
  text-align: center;
  position: relative;
}
header h1 {
  font-size: 1.55rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.theme-toggle {
  position: absolute;
  top: 18px;
  right: 16px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--panel-border);
  background: var(--panel);
  backdrop-filter: blur(10px);
  cursor: pointer;
  font-size: 1.05rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-soft);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.theme-toggle:hover { transform: translateY(-1px) scale(1.05); box-shadow: var(--shadow); }
.theme-toggle:active { transform: scale(0.94); }
.theme-icon-light, .theme-icon-dark { display: none; }
[data-theme="dark"] .theme-icon-dark { display: block; }
[data-theme="light"] .theme-icon-light { display: block; }

.tabs {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 6px;
  padding: 14px 14px;
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}
.tab {
  flex: none;
  padding: 6px 12px;
  border: 1px solid var(--panel-border);
  border-radius: 9px;
  background: var(--panel);
  color: var(--text-dim);
  font-family: var(--font);
  font-weight: 600;
  font-size: 0.74rem;
  cursor: pointer;
  transition: all 0.2s ease;
}
.tab:hover { color: var(--text); border-color: color-mix(in srgb, var(--accent) 35%, var(--panel-border)); }
.tab.active {
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #fff;
  border-color: transparent;
  box-shadow: 0 6px 20px -4px color-mix(in srgb, var(--accent) 55%, transparent);
}

main { padding: 4px 14px; max-width: 900px; margin: 0 auto; }

.tab-panel { display: none; }
.tab-panel.active { display: block; animation: fadeIn 0.35s ease; }

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.panel {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  padding: 20px 18px;
  margin-bottom: 16px;
}
.panel h2 { font-size: 1.05rem; font-weight: 700; margin-bottom: 12px; letter-spacing: -0.01em; }

.panel-header { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; justify-content: space-between; margin-bottom: 10px; }
.panel-header h2 { margin-bottom: 0; }

.toggles { display: flex; gap: 8px; }
.toggle-group {
  display: flex;
  border: 1px solid var(--panel-border);
  border-radius: 999px;
  overflow: hidden;
  background: var(--input-bg);
  padding: 3px;
}
.toggle-group button {
  padding: 6px 13px;
  background: transparent;
  border: none;
  border-radius: 999px;
  color: var(--text-dim);
  font-family: var(--font);
  font-weight: 600;
  font-size: 0.8rem;
  cursor: pointer;
  transition: all 0.2s ease;
}
.toggle-group button:hover { color: var(--text); }
.toggle-group button.active {
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #fff;
  box-shadow: 0 3px 10px -2px color-mix(in srgb, var(--accent) 60%, transparent);
}

/* ---- cards ---- */
.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: 14px 0 16px;
}
.card {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  padding: 16px 14px;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-soft);
  backdrop-filter: blur(16px);
}
.card::before {
  content: '';
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: var(--card-color);
  box-shadow: 0 0 14px var(--card-color);
}
.card::after {
  content: '';
  position: absolute;
  top: -30%; right: -30%;
  width: 70%; height: 70%;
  background: radial-gradient(circle, color-mix(in srgb, var(--card-color) 22%, transparent) 0%, transparent 70%);
  pointer-events: none;
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.card.focused {
  border-color: var(--card-color);
  box-shadow: 0 0 0 1px var(--card-color), 0 10px 30px -6px color-mix(in srgb, var(--card-color) 45%, transparent);
}
.card .icon {
  font-size: 1.15rem;
  width: 34px; height: 34px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 10px;
  background: color-mix(in srgb, var(--card-color) 16%, transparent);
  margin-bottom: 8px;
}
.card .name { font-size: 0.72rem; color: var(--text-dim); margin: 0 0 5px; text-transform: uppercase; letter-spacing: 0.6px; font-weight: 600; }
.card .value { font-size: 1.2rem; font-weight: 800; color: var(--card-color); letter-spacing: -0.01em; }
.card .sub { font-size: 0.75rem; color: var(--text-dim); margin-top: 3px; font-weight: 500; }

.card-electricity { --card-color: var(--electricity); }
.card-gas { --card-color: var(--gas); }
.card-water { --card-color: var(--water); }

.focus-banner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent);
  border-radius: 12px;
  padding: 9px 14px;
  margin-bottom: 12px;
  font-size: 0.85rem;
  font-weight: 500;
}
.focus-banner button {
  background: transparent;
  border: none;
  color: var(--accent);
  cursor: pointer;
  font-family: var(--font);
  font-weight: 700;
  font-size: 0.85rem;
}

.chart-wrap { position: relative; height: 300px; }

/* ---- year totals ---- */
.year-block { margin-bottom: 10px; }
.year-block h3 { font-size: 0.95rem; font-weight: 700; margin-bottom: 8px; color: var(--accent); }
.totals-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}
.total-item {
  background: var(--input-bg);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-sm);
  padding: 12px;
  font-size: 0.82rem;
  transition: transform 0.15s ease;
}
.total-item:hover { transform: translateY(-1px); }
.total-item .t-label { color: var(--text-dim); font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.5px; font-weight: 600; }
.total-item .t-value { font-size: 1.05rem; font-weight: 700; margin-top: 3px; }
.total-item.ti-electricity .t-value { color: var(--electricity); }
.total-item.ti-gas .t-value { color: var(--gas); }
.total-item.ti-water .t-value { color: var(--water); }
.total-item.ti-total {
  grid-column: span 2;
  background: linear-gradient(135deg, color-mix(in srgb, var(--accent) 16%, transparent), color-mix(in srgb, var(--accent2) 12%, transparent));
  border-color: color-mix(in srgb, var(--accent) 30%, transparent);
}
.total-item.ti-total .t-value { color: var(--accent2); }

/* ---- forms ---- */
form label { display: block; margin-bottom: 14px; font-size: 0.85rem; color: var(--text-dim); font-weight: 600; }
form input, form textarea {
  width: 100%;
  margin-top: 6px;
  padding: 11px 13px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--panel-border);
  background: var(--input-bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 1rem;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}
form input::placeholder, form textarea::placeholder { color: var(--text-dim); opacity: 0.7; }
form input:focus, form textarea:focus {
  outline: none;
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 5%, var(--input-bg));
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 16%, transparent);
}
.lbl-electricity input:focus { border-color: var(--electricity); box-shadow: 0 0 0 4px color-mix(in srgb, var(--electricity) 18%, transparent); }
.lbl-gas input:focus { border-color: var(--gas); box-shadow: 0 0 0 4px color-mix(in srgb, var(--gas) 18%, transparent); }
.lbl-water input:focus { border-color: var(--water); box-shadow: 0 0 0 4px color-mix(in srgb, var(--water) 18%, transparent); }

.row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }

.form-actions { display: flex; gap: 10px; margin-top: 8px; }
.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #fff;
  border: none;
  padding: 11px 22px;
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-weight: 700;
  font-size: 0.92rem;
  cursor: pointer;
  box-shadow: 0 6px 18px -4px color-mix(in srgb, var(--accent) 55%, transparent);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 8px 22px -4px color-mix(in srgb, var(--accent) 65%, transparent); }
.btn-primary:active { transform: translateY(0); }
.btn-secondary {
  background: transparent;
  color: var(--text-dim);
  border: 1px solid var(--panel-border);
  padding: 11px 20px;
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
}
.btn-secondary:hover { color: var(--text); border-color: var(--text-dim); }
.btn-link { display: inline-block; text-decoration: none; }

.warning {
  background: color-mix(in srgb, var(--electricity) 14%, transparent);
  border: 1px solid color-mix(in srgb, var(--electricity) 40%, transparent);
  color: color-mix(in srgb, var(--electricity) 85%, var(--text));
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  font-size: 0.85rem;
  margin-bottom: 12px;
  font-weight: 500;
}

.hint { font-size: 0.82rem; color: var(--text-dim); margin-bottom: 14px; }

/* ---- tables ---- */
.table-wrap { overflow-x: auto; margin-top: 8px; }
table { width: 100%; border-collapse: collapse; font-size: 0.85rem; }
th, td { padding: 10px 8px; text-align: left; border-bottom: 1px solid var(--panel-border); white-space: nowrap; }
th { color: var(--text-dim); font-weight: 700; font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.4px; }
th.c-electricity { color: var(--electricity); }
th.c-gas { color: var(--gas); }
th.c-water { color: var(--water); }
tbody tr { transition: background 0.15s ease; }
tbody tr:hover { background: var(--input-bg); }
td .row-actions { display: flex; gap: 6px; }
td button {
  background: var(--input-bg);
  border: 1px solid var(--panel-border);
  border-radius: 8px;
  color: var(--text-dim);
  padding: 5px 9px;
  cursor: pointer;
  font-size: 0.8rem;
  transition: all 0.15s ease;
}
td button:hover { color: var(--text); border-color: var(--text-dim); }
td .note-icon { cursor: help; }

/* ---- logbook ---- */
.log-item {
  background: var(--input-bg);
  border: 1px solid var(--panel-border);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius-sm);
  padding: 13px;
  margin-bottom: 10px;
  transition: transform 0.15s ease;
}
.log-item:hover { transform: translateX(2px); }
.log-item .log-date { font-size: 0.75rem; color: var(--accent); font-weight: 700; margin-bottom: 4px; }
.log-item .log-text { font-size: 0.9rem; }
.log-item .log-actions { margin-top: 8px; display: flex; gap: 6px; }
.log-item .log-actions button {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 8px;
  color: var(--text-dim);
  padding: 4px 10px;
  cursor: pointer;
  font-size: 0.78rem;
}

.empty {
  text-align: center;
  padding: 48px 20px;
  color: var(--text-dim);
  background: var(--panel);
  border: 1px dashed var(--panel-border);
  border-radius: var(--radius);
  margin-top: 14px;
}

.hidden { display: none !important; }

.toast {
  position: fixed;
  bottom: 22px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--panel-solid);
  border: 1px solid var(--accent);
  color: var(--text);
  padding: 12px 22px;
  border-radius: 14px;
  box-shadow: var(--shadow);
  font-size: 0.9rem;
  font-weight: 600;
  z-index: 100;
  animation: toastIn 0.25s ease;
}
@keyframes toastIn {
  from { opacity: 0; transform: translate(-50%, 8px); }
  to { opacity: 1; transform: translate(-50%, 0); }
}

@media (min-width: 700px) {
  header h1 { font-size: 2rem; }
  .chart-wrap { height: 380px; }
  .totals-grid { grid-template-columns: repeat(4, 1fr); }
  .total-item.ti-total { grid-column: span 4; }
}
@media (max-width: 420px) {
  .cards { grid-template-columns: 1fr 1fr 1fr; gap: 7px; }
  .card { padding: 11px 9px; }
  .card .value { font-size: 0.98rem; }
  .theme-toggle { top: 14px; right: 12px; width: 36px; height: 36px; }
}