/* ---------- Material-inspirierte Design Tokens ---------- */

:root {
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-pill: 999px;
  --font: "Google Sans", "Roboto", -apple-system, "Segoe UI", sans-serif;

  --accent-gas: #ff8a3d;
  --accent-strom: #f4c430;
  --accent-wasser: #4fc3f7;
}

[data-theme="dark"] {
  --bg: #0e1013;
  --surface: #17191d;
  --surface-container: #1c1f24;
  --surface-container-high: #24272d;
  --surface-container-highest: #2c2f36;
  --on-surface: #e3e2e6;
  --on-surface-variant: #9a9da4;
  --outline: #2e3238;
  --outline-variant: #26292e;
  --primary: #9fcaff;
  --on-primary: #003258;
  --primary-container: #1c4a75;
  --on-primary-container: #d3e4ff;
  --shadow-1: 0 1px 3px rgba(0,0,0,0.4), 0 1px 2px rgba(0,0,0,0.5);
  --shadow-2: 0 3px 8px rgba(0,0,0,0.4), 0 1px 3px rgba(0,0,0,0.4);
  --danger: #ffb4ab;
  --success: #7ad99a;
  color-scheme: dark;
}

[data-theme="light"] {
  --bg: #f7f9fb;
  --surface: #ffffff;
  --surface-container: #f0f2f6;
  --surface-container-high: #e8eaef;
  --surface-container-highest: #e0e3e8;
  --on-surface: #1a1c1e;
  --on-surface-variant: #5c6067;
  --outline: #e2e5ea;
  --outline-variant: #eceef2;
  --primary: #2f6690;
  --on-primary: #ffffff;
  --primary-container: #d3e4ff;
  --on-primary-container: #1c3a56;
  --shadow-1: 0 1px 2px rgba(20,20,30,0.08), 0 1px 3px rgba(20,20,30,0.10);
  --shadow-2: 0 2px 6px rgba(20,20,30,0.08), 0 4px 12px rgba(20,20,30,0.08);
  --danger: #ba1a1a;
  --success: #1d8348;
  color-scheme: light;
}

* { box-sizing: border-box; }

/* Das hidden-Attribut muss IMMER gewinnen, auch gegen Elemente mit eigener
   display-Regel (z.B. .login-screen, .modal-backdrop, .tabs, main#app) */
[hidden] { display: none !important; }

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--on-surface);
  min-height: 100vh;
  transition: background 0.2s ease, color 0.2s ease;
}

.material-symbols-rounded {
  font-size: 20px;
  line-height: 1;
  vertical-align: middle;
}

/* ---------- Topbar ---------- */

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--outline-variant);
}
.topbar-inner {
  width: 100%;
  padding: 14px 24px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 10px;
}
.topbar-side { display: flex; align-items: center; gap: 8px; }
.topbar-left { justify-content: flex-start; }
.topbar-right { justify-content: flex-end; }
.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 19px;
  color: var(--on-surface);
  letter-spacing: -0.01em;
  justify-self: center;
  white-space: nowrap;
}
.brand-icon {
  color: var(--primary);
  background: var(--primary-container);
  border-radius: var(--radius-pill);
  padding: 6px;
  font-size: 20px;
}

/* ---------- Buttons ---------- */

.btn {
  border: none;
  border-radius: var(--radius-pill);
  padding: 10px 18px;
  font-size: 14px;
  font-weight: 500;
  font-family: var(--font);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: background 0.15s ease, box-shadow 0.15s ease, transform 0.08s ease;
}
.btn:active { transform: scale(0.97); }
.btn-primary { background: var(--primary); color: var(--on-primary); box-shadow: var(--shadow-1); }
.btn-primary:hover { box-shadow: var(--shadow-2); }
.btn-tonal { background: var(--primary-container); color: var(--on-primary-container); }
.btn-tonal:hover { filter: brightness(1.08); }
.btn-ghost { background: var(--surface-container-high); color: var(--on-surface); }
.btn-ghost:hover { background: var(--surface-container-highest); }
.btn-danger { background: transparent; color: var(--danger); border: 1px solid color-mix(in srgb, var(--danger) 45%, transparent); }
.btn-danger:hover { background: color-mix(in srgb, var(--danger) 10%, transparent); }
.btn-sm { padding: 6px 12px; font-size: 12.5px; }

.btn-icon {
  background: var(--surface-container-high);
  color: var(--on-surface);
  border: none;
  border-radius: var(--radius-pill);
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background 0.15s ease;
}
.btn-icon:hover { background: var(--surface-container-highest); }

/* ---------- Tabs ---------- */

.tabs {
  max-width: 1000px;
  margin: 20px auto 0;
  display: flex;
  gap: 8px;
  padding: 0 20px;
}
.tab {
  flex: 1;
  padding: 13px 12px;
  border: 1px solid var(--outline-variant);
  background: var(--surface-container);
  color: var(--on-surface-variant);
  border-radius: var(--radius-pill);
  cursor: pointer;
  font-size: 14.5px;
  font-weight: 500;
  font-family: var(--font);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: all 0.15s ease;
}
.tab:hover { background: var(--surface-container-high); }
.tab.active {
  color: var(--on-primary-container);
  background: var(--primary-container);
  border-color: transparent;
  font-weight: 700;
}
.tab[data-tab="gas"].active .material-symbols-rounded { color: var(--accent-gas); }
.tab[data-tab="strom"].active .material-symbols-rounded { color: var(--accent-strom); }
.tab[data-tab="wasser"].active .material-symbols-rounded { color: var(--accent-wasser); }

main#app {
  max-width: 1000px;
  margin: 0 auto;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* ---------- Cards ---------- */

.card {
  background: var(--surface-container);
  border: 1px solid var(--outline-variant);
  border-radius: var(--radius-lg);
  padding: 20px 22px;
  box-shadow: var(--shadow-1);
}
.card h2, .card h3 {
  margin: 0 0 14px;
  font-size: 13px;
  color: var(--on-surface-variant);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 700;
}
.card-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}
.card-header-row h2 { margin: 0; }

/* ---------- Info-Chips (gespeicherte Werte) ---------- */

.info-chips {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}
.info-chip {
  display: flex;
  align-items: baseline;
  gap: 6px;
  background: var(--surface-container-high);
  border: 1px solid var(--outline-variant);
  border-radius: var(--radius-pill);
  padding: 8px 14px;
  font-size: 13px;
}
.info-chip .chip-label { color: var(--on-surface-variant); }
.info-chip .chip-value { font-weight: 700; color: var(--on-surface); font-size: 14px; }

.edit-toggle {
  background: none;
  border: none;
  color: var(--primary);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  font-family: var(--font);
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 4px;
}

/* ---------- Forms ---------- */

.meter-config, .reading-form {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  align-items: flex-end;
}
.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1;
  min-width: 160px;
}
.reading-form .field { flex: 0 1 160px; }
.field label { font-size: 12px; color: var(--on-surface-variant); font-weight: 500; }
.field .hint { font-size: 11px; color: var(--on-surface-variant); font-weight: 400; }

input, textarea {
  background: var(--surface-container-high);
  border: 1px solid var(--outline-variant);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  color: var(--on-surface);
  font-size: 14px;
  font-family: var(--font);
  transition: border-color 0.15s ease;
}
input:focus, textarea:focus { outline: none; border-color: var(--primary); }

/* ---------- KPIs ---------- */

.kpi-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 12px;
}
.kpi {
  background: var(--surface-container-high);
  border-radius: var(--radius-md);
  padding: 16px 18px;
}
.kpi .value { font-size: 23px; font-weight: 700; letter-spacing: -0.01em; }
.kpi .label { font-size: 12px; color: var(--on-surface-variant); margin-top: 4px; }
.kpi .delta-up { color: var(--danger); font-size: 12px; font-weight: 500; }
.kpi .delta-down { color: var(--success); font-size: 12px; font-weight: 500; }

/* ---------- Table ---------- */

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13.5px;
}
th, td {
  text-align: right;
  padding: 11px 10px;
  border-bottom: 1px solid var(--outline-variant);
  white-space: nowrap;
}
th:first-child, td:first-child { text-align: left; }
th { color: var(--on-surface-variant); font-weight: 600; font-size: 11.5px; text-transform: uppercase; letter-spacing: 0.03em; }
tbody tr:hover { background: var(--surface-container-high); }
.table-scroll { overflow-x: auto; }
td.actions { text-align: center; }

.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: color-mix(in srgb, var(--accent-gas) 18%, transparent);
  color: var(--accent-gas);
  border-radius: var(--radius-pill);
  padding: 3px 9px;
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  font-family: var(--font);
}
.badge:hover { filter: brightness(1.15); }

/* ---------- Charts ---------- */

.chart-wrap { position: relative; height: 280px; }
.chart-tabs { display: flex; gap: 8px; margin-bottom: 14px; }
.chart-tabs button {
  background: var(--surface-container-high);
  border: 1px solid var(--outline-variant);
  color: var(--on-surface-variant);
  border-radius: var(--radius-pill);
  padding: 7px 14px;
  font-size: 12.5px;
  font-weight: 500;
  font-family: var(--font);
  cursor: pointer;
}
.chart-tabs button.active { color: var(--on-primary-container); background: var(--primary-container); font-weight: 700; }

/* ---------- Toast ---------- */

.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--surface-container-highest);
  border: 1px solid var(--outline-variant);
  color: var(--on-surface);
  padding: 12px 20px;
  border-radius: var(--radius-pill);
  font-size: 13px;
  font-weight: 500;
  opacity: 0;
  pointer-events: none;
  transition: all 0.25s ease;
  box-shadow: var(--shadow-2);
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.toast.error { border-color: color-mix(in srgb, var(--danger) 50%, transparent); color: var(--danger); }

.empty-state { color: var(--on-surface-variant); font-size: 13.5px; text-align: center; padding: 24px 0; }

@media (max-width: 600px) {
  .tabs { flex-wrap: wrap; }
  .reading-form .field { flex: 1 1 100%; }
}

/* ---------- Login Screen ---------- */

.login-screen {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
}
.login-card {
  background: var(--surface-container);
  border: 1px solid var(--outline-variant);
  border-radius: var(--radius-lg);
  padding: 32px 30px;
  width: 100%;
  max-width: 360px;
  box-shadow: var(--shadow-2);
}
.login-brand {
  justify-content: center;
  margin-bottom: 24px;
  font-size: 20px;
}
#loginForm { display: flex; flex-direction: column; gap: 16px; }
.login-submit { width: 100%; justify-content: center; margin-top: 6px; }
.login-error {
  background: color-mix(in srgb, var(--danger) 12%, transparent);
  color: var(--danger);
  border-radius: var(--radius-sm);
  padding: 9px 12px;
  font-size: 13px;
}

/* ---------- Drawer ---------- */

.drawer-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.45);
  z-index: 40;
}
.drawer {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: 280px;
  background: var(--surface-container);
  border-right: 1px solid var(--outline-variant);
  z-index: 50;
  transform: translateX(-100%);
  transition: transform 0.22s ease;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-2);
}
.drawer.open { transform: translateX(0); }
.drawer-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 22px 20px;
  border-bottom: 1px solid var(--outline-variant);
  font-weight: 700;
  font-size: 16px;
}
.drawer-username { color: var(--on-surface); }
.drawer-nav { display: flex; flex-direction: column; padding: 10px; gap: 4px; }
.drawer-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border: none;
  background: transparent;
  color: var(--on-surface);
  border-radius: var(--radius-pill);
  font-size: 14.5px;
  font-family: var(--font);
  cursor: pointer;
  text-align: left;
}
.drawer-item:hover { background: var(--surface-container-high); }

.modal-hint { margin: 0; font-size: 13.5px; color: var(--on-surface-variant); }

/* ---------- KPI Jahresfilter ---------- */

.kpi-year-select {
  display: flex;
  align-items: center;
  gap: 8px;
}
.kpi-year-select select {
  background: var(--surface-container-high);
  border: 1px solid var(--outline-variant);
  border-radius: var(--radius-sm);
  padding: 7px 10px;
  color: var(--on-surface);
  font-size: 13px;
  font-family: var(--font);
  cursor: pointer;
}

/* ---------- Klappbare Jahres-Gruppen in der Tabelle ---------- */

.year-group { border-radius: var(--radius-md); overflow: hidden; margin-bottom: 8px; border: 1px solid var(--outline-variant); }
.year-header {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 14px;
  background: var(--surface-container-high);
  border: none;
  cursor: pointer;
  font-family: var(--font);
  color: var(--on-surface);
}
.year-header-left { display: flex; align-items: center; gap: 8px; font-weight: 700; font-size: 14.5px; }
.year-header-right { display: flex; align-items: center; gap: 14px; font-size: 12.5px; color: var(--on-surface-variant); }
.year-chevron { transition: transform 0.15s ease; }
.year-group.collapsed .year-chevron { transform: rotate(-90deg); }
.year-body { max-height: 4000px; overflow: hidden; transition: max-height 0.2s ease; }
.year-group.collapsed .year-body { max-height: 0; }

/* ---------- Eigenständige Seiten (Import, Profil) ---------- */

.page-wrap {
  max-width: 1000px;
  margin: 0 auto;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.page-header {
  display: flex;
  align-items: center;
  gap: 12px;
}
.page-header h1 {
  margin: 0;
  font-size: 21px;
  font-weight: 700;
  letter-spacing: -0.01em;
}
.page-wrap h2 {
  margin: 0 0 6px;
  font-size: 15px;
  font-weight: 700;
}
.page-wrap form { margin-top: 14px; display: flex; flex-direction: column; gap: 14px; max-width: 380px; }

.dropzone {
  margin-top: 16px;
  border: 2px dashed var(--outline-variant);
  border-radius: var(--radius-md);
  padding: 32px 20px;
  text-align: center;
  color: var(--on-surface-variant);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  transition: border-color 0.15s ease, background 0.15s ease;
}
.dropzone:hover, .dropzone.drag-over {
  border-color: var(--primary);
  background: var(--surface-container-high);
}
.dropzone .material-symbols-rounded { color: var(--primary); }

#importResult table { margin-top: 16px; }
#importResult .login-error { margin-top: 14px; }