/* ─────────────────────────────────────────────────────────────────────────
   MeinStromkreis PWA — Tesla/Apple-Stil: minimalistisch, weiß/hellgrau,
   starke Typografie, viel Weißraum. Mobile-first (375px), skaliert zu Desktop.
   ────────────────────────────────────────────────────────────────────────── */

:root {
  --msk-bg:          #ffffff;
  --msk-bg-alt:       #f5f5f7;
  --msk-card:         #ffffff;
  --msk-border:       #e5e5ea;
  --msk-text:         #0a0a0a;
  --msk-text-2:       #6e6e73;
  --msk-accent:       #000000;
  --msk-accent-text:  #ffffff;
  --msk-green:        #1a8a3d;
  --msk-amber:        #b8860b;
  --msk-radius:       16px;
  --msk-radius-sm:    10px;
  --msk-nav-h:        64px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--msk-bg);
  color: var(--msk-text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
}

button, input {
  font-family: inherit;
}

a { color: inherit; }

/* ── Login ─────────────────────────────────────────────────────────────── */

.msk-login-body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.msk-login-card {
  width: 100%;
  max-width: 360px;
  text-align: center;
}

.msk-login-title {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 0.4rem;
}

.msk-login-sub {
  color: var(--msk-text-2);
  font-size: 1rem;
  margin: 0 0 2.5rem;
}

.msk-login-form {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.msk-input {
  width: 100%;
  padding: 0.9rem 1rem;
  border-radius: var(--msk-radius-sm);
  border: 1px solid var(--msk-border);
  background: var(--msk-bg-alt);
  color: var(--msk-text);
  font-size: 1rem;
  outline: none;
}

.msk-input:focus {
  border-color: var(--msk-accent);
}

.msk-btn-primary {
  width: 100%;
  padding: 0.9rem 1rem;
  border-radius: var(--msk-radius-sm);
  border: none;
  background: var(--msk-accent);
  color: var(--msk-accent-text);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
}

.msk-btn-primary:disabled {
  opacity: 0.5;
  cursor: default;
}

.msk-login-msg {
  margin-top: 1.5rem;
  font-size: 0.9rem;
  color: var(--msk-text-2);
  min-height: 1.2em;
}

.msk-msg-error { color: #c0392b; }

/* ── App shell ─────────────────────────────────────────────────────────── */

.msk-app {
  max-width: 480px;
  margin: 0 auto;
  padding-bottom: calc(var(--msk-nav-h) + 1.5rem);
  min-height: 100vh;
}

.msk-header {
  padding: 1.5rem 1.25rem 0.5rem;
}

.msk-header-title {
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0;
}

.msk-tab {
  display: none;
  padding: 0 1.25rem;
  animation: msk-fade .15s ease-out;
}

.msk-tab.active { display: block; }

@keyframes msk-fade {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* ── Bottom navigation ─────────────────────────────────────────────────── */

.msk-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: var(--msk-nav-h);
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-top: 1px solid var(--msk-border);
  display: flex;
  max-width: 480px;
  margin: 0 auto;
  z-index: 10;
}

.msk-nav-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.2rem;
  background: none;
  border: none;
  color: var(--msk-text-2);
  font-size: 0.75rem;
  font-weight: 500;
  cursor: pointer;
  padding: 0;
}

.msk-nav-item .msk-nav-icon {
  font-size: 1.3rem;
  line-height: 1;
}

.msk-nav-item.active {
  color: var(--msk-accent);
}

/* ── Cards ─────────────────────────────────────────────────────────────── */

.msk-card {
  background: var(--msk-card);
  border: 1px solid var(--msk-border);
  border-radius: var(--msk-radius);
  padding: 1.25rem;
  margin: 1rem 0;
}

.msk-empty {
  color: var(--msk-text-2);
  text-align: center;
  padding: 2rem 1rem;
  font-size: 0.95rem;
}

/* ── Tab 1: Heute ──────────────────────────────────────────────────────── */

.msk-hero {
  text-align: center;
  padding: 1.5rem 0 0.5rem;
}

.msk-hero-value {
  font-size: 3.2rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1;
}

.msk-hero-label {
  color: var(--msk-text-2);
  font-size: 0.95rem;
  margin-top: 0.5rem;
}

.msk-chart-wrap {
  display: flex;
  justify-content: center;
  padding: 1rem 0;
}

.msk-stats-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
  margin: 1rem 0;
}

.msk-stat {
  background: var(--msk-bg-alt);
  border-radius: var(--msk-radius-sm);
  padding: 0.9rem 0.5rem;
  text-align: center;
}

.msk-stat-value {
  font-size: 1.2rem;
  font-weight: 700;
}

.msk-stat-label {
  font-size: 0.75rem;
  color: var(--msk-text-2);
  margin-top: 0.2rem;
}

/* ── Tab 2: Meine Anlage ───────────────────────────────────────────────── */

.msk-site-name {
  font-size: 1.15rem;
  font-weight: 700;
  margin: 0 0 0.3rem;
}

.msk-site-meta {
  color: var(--msk-text-2);
  font-size: 0.9rem;
  margin: 0.15rem 0;
}

.msk-module-card {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  padding: 1rem 1.1rem;
}

.msk-module-icon {
  font-size: 1.5rem;
  width: 2.25rem;
  text-align: center;
}

.msk-module-body { flex: 1; }

.msk-module-title {
  font-weight: 600;
  font-size: 0.98rem;
}

.msk-badge {
  font-size: 0.72rem;
  font-weight: 600;
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
  white-space: nowrap;
}

.msk-badge-active {
  background: #e6f5ea;
  color: var(--msk-green);
}

.msk-badge-soon {
  background: var(--msk-bg-alt);
  color: var(--msk-text-2);
}

/* ── Tab 3: Optimieren ─────────────────────────────────────────────────── */

.msk-hint-title {
  font-weight: 600;
  font-size: 1rem;
  margin: 0 0 0.35rem;
}

.msk-hint-desc {
  color: var(--msk-text-2);
  font-size: 0.9rem;
  line-height: 1.4;
  margin: 0 0 0.6rem;
}

.msk-hint-savings {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--msk-green);
}

/* ── Dark mode ─────────────────────────────────────────────────────────── */

@media (prefers-color-scheme: dark) {
  :root {
    --msk-bg:          #000000;
    --msk-bg-alt:       #1c1c1e;
    --msk-card:         #1c1c1e;
    --msk-border:       #2c2c2e;
    --msk-text:         #ffffff;
    --msk-text-2:       #98989d;
    --msk-accent:       #ffffff;
    --msk-accent-text:  #000000;
  }
  .msk-nav {
    background: rgba(0,0,0,0.85);
  }
  .msk-badge-active {
    background: #0f2c17;
  }
}