/* ============================================================================
   Solar-Log Reception Portal — Admin UI
   Plain CSS, no framework. Solar-themed, calm palette, card-based layout.
   ========================================================================== */

:root {
  --bg:            #0f1419;
  --bg-elevated:   #161d26;
  --surface:       #1c2530;
  --surface-2:     #232e3b;
  --border:        #2b3848;
  --border-soft:   #222d3a;
  --text:          #e6edf3;
  --text-muted:    #9aa7b6;
  --text-dim:      #6b7888;
  --accent:        #f6a623;   /* solar amber */
  --accent-2:      #ffc861;
  --accent-soft:   rgba(246, 166, 35, 0.12);
  --positive:      #3fb950;
  --negative:      #f0616d;
  --info:          #58a6ff;
  --radius:        12px;
  --radius-sm:     8px;
  --shadow:        0 1px 2px rgba(0,0,0,.4), 0 8px 24px rgba(0,0,0,.28);
  --shadow-sm:     0 1px 2px rgba(0,0,0,.35);
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
          Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--info); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3 { margin: 0 0 .25em; font-weight: 650; letter-spacing: -0.01em; }
h1 { font-size: 1.5rem; }
h2 { font-size: 1.15rem; }
h3 { font-size: 1rem; }

.muted { color: var(--text-muted); }
.dim   { color: var(--text-dim); }
.mono  { font-variant-numeric: tabular-nums; font-feature-settings: "tnum"; }

/* ── App shell ───────────────────────────────────────────────────────────── */
.app { min-height: 100vh; display: flex; flex-direction: column; }

.topbar {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 0 1.5rem;
  height: 60px;
  background: var(--bg-elevated);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 20;
}

.brand {
  display: flex;
  align-items: center;
  gap: .65rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  font-size: 1.05rem;
  color: var(--text);
}
.brand:hover { text-decoration: none; }
.brand .mark {
  width: 26px; height: 26px;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: 7px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #1a1205;
  flex: 0 0 auto;
}
.brand .mark svg { display: block; }

.nav {
  display: flex;
  align-items: center;
  gap: .25rem;
  margin-left: .5rem;
}
.nav a {
  color: var(--text-muted);
  padding: .45rem .8rem;
  border-radius: var(--radius-sm);
  font-size: .92rem;
  font-weight: 500;
  transition: background .12s, color .12s;
}
.nav a:hover { color: var(--text); background: var(--surface); text-decoration: none; }
.nav a.active { color: var(--accent-2); background: var(--accent-soft); }

.topbar-right {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: .9rem;
}
.user-chip {
  display: flex; align-items: center; gap: .5rem;
  color: var(--text-muted);
  font-size: .9rem;
}
.user-chip .avatar {
  width: 28px; height: 28px; border-radius: 50%;
  background: var(--surface-2);
  display: inline-flex; align-items: center; justify-content: center;
  font-size: .8rem; font-weight: 600; color: var(--accent-2);
  border: 1px solid var(--border);
}

.content {
  flex: 1;
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
}

/* ── Page header ─────────────────────────────────────────────────────────── */
.page-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}
.page-head .subtitle { color: var(--text-muted); font-size: .95rem; margin-top: .15rem; }

/* ── Buttons ─────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: .45rem;
  font: inherit; font-size: .92rem; font-weight: 600;
  padding: .55rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  transition: background .12s, border-color .12s, transform .04s;
  text-decoration: none;
  white-space: nowrap;
}
.btn:hover { background: var(--surface-2); text-decoration: none; }
.btn:active { transform: translateY(1px); }
.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #1a1205;
  border-color: transparent;
}
.btn-primary:hover { filter: brightness(1.06); background: linear-gradient(135deg, var(--accent), var(--accent-2)); }
.btn-ghost { background: transparent; }
.btn-ghost:hover { background: var(--surface); }
.btn-danger { color: var(--negative); border-color: rgba(240,97,109,.4); background: transparent; }
.btn-danger:hover { background: rgba(240,97,109,.1); }
.btn[disabled] { opacity: .55; cursor: not-allowed; }
.btn-block { width: 100%; justify-content: center; }

/* ── Cards ───────────────────────────────────────────────────────────────── */
.card {
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}
.card-pad { padding: 1.25rem 1.4rem; }
.card-head {
  padding: 1rem 1.4rem;
  border-bottom: 1px solid var(--border-soft);
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
}

/* ── Stat grid ───────────────────────────────────────────────────────────── */
.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}
.stat {
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  padding: 1.1rem 1.25rem;
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
}
.stat::before {
  content: "";
  position: absolute; left: 0; top: 0; bottom: 0; width: 3px;
  background: linear-gradient(var(--accent), var(--accent-2));
  opacity: .8;
}
.stat .label { color: var(--text-muted); font-size: .82rem; text-transform: uppercase; letter-spacing: .04em; }
.stat .value { font-size: 1.9rem; font-weight: 700; margin-top: .35rem; letter-spacing: -0.02em; }
.stat .unit  { font-size: .95rem; color: var(--text-muted); font-weight: 500; margin-left: .2rem; }

/* ── Table ───────────────────────────────────────────────────────────────── */
.table-wrap { overflow-x: auto; }
table.data {
  width: 100%;
  border-collapse: collapse;
  font-size: .92rem;
}
table.data th {
  text-align: left;
  font-weight: 600;
  color: var(--text-muted);
  font-size: .78rem;
  text-transform: uppercase;
  letter-spacing: .04em;
  padding: .7rem 1rem;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}
table.data td {
  padding: .8rem 1rem;
  border-bottom: 1px solid var(--border-soft);
  vertical-align: middle;
}
table.data tbody tr { transition: background .1s; }
table.data tbody tr.clickable { cursor: pointer; }
table.data tbody tr.clickable:hover { background: var(--surface-2); }
table.data tbody tr:last-child td { border-bottom: none; }
table.data td.num { text-align: right; font-variant-numeric: tabular-nums; }
table.data th.num { text-align: right; }

.cell-strong { font-weight: 600; color: var(--text); }
.cell-sub { color: var(--text-dim); font-size: .82rem; }

/* ── Badges ──────────────────────────────────────────────────────────────── */
.badge {
  display: inline-flex; align-items: center; gap: .35rem;
  font-size: .76rem; font-weight: 600;
  padding: .2rem .55rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text-muted);
  white-space: nowrap;
}
.badge .dot { width: 6px; height: 6px; border-radius: 50%; background: currentColor; }
.badge.ok      { color: var(--positive); border-color: rgba(63,185,80,.35); background: rgba(63,185,80,.1); }
.badge.off     { color: var(--text-dim); }
.badge.http    { color: var(--info); border-color: rgba(88,166,255,.35); background: rgba(88,166,255,.08); }
.badge.ftp     { color: var(--accent-2); border-color: rgba(246,166,35,.35); background: rgba(246,166,35,.08); }
.badge.err     { color: #ffb3b9; border-color: rgba(240,97,109,.35); background: rgba(240,97,109,.1); }

/* ── Forms ───────────────────────────────────────────────────────────────── */
.form-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.1rem 1.4rem;
}
.field { display: flex; flex-direction: column; gap: .35rem; }
.field.col-2 { grid-column: span 2; }
.field label {
  font-size: .82rem; font-weight: 600; color: var(--text-muted);
}
.field label .req { color: var(--accent); margin-left: .15rem; }
.field input, .field select {
  font: inherit; font-size: .94rem;
  padding: .6rem .7rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  transition: border-color .12s, box-shadow .12s;
  width: 100%;
}
.field input:focus, .field select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.field input::placeholder { color: var(--text-dim); }
.field select {
  /* Natives Select ignoriert vertikales Padding (macOS) -> selbst rendern,
     damit es dieselbe Höhe wie die Inputs bekommt. */
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='none' stroke='%238b949e' stroke-width='2' d='M1 1l5 5 5-5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right .7rem center;
  padding-right: 2.2rem;
}
.field .hint { font-size: .78rem; color: var(--text-dim); }

.form-actions {
  display: flex; gap: .75rem; align-items: center;
  margin-top: 1.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border-soft);
}

/* ── Alerts / feedback ───────────────────────────────────────────────────── */
.alert {
  padding: .7rem .9rem;
  border-radius: var(--radius-sm);
  font-size: .9rem;
  border: 1px solid transparent;
  margin-bottom: 1rem;
}
.alert-error   { background: rgba(240,97,109,.1); border-color: rgba(240,97,109,.35); color: #ffb3b9; }
.alert-success { background: rgba(63,185,80,.1);  border-color: rgba(63,185,80,.35);  color: #9be8a8; }
.alert-info    { background: rgba(88,166,255,.08);border-color: rgba(88,166,255,.3);  color: #b8d6ff; }

/* ── Yield tiles (Heute / Gestern / Monat / Jahr) ────────────────────────── */
.yield-tiles {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin-bottom: 1.5rem;
}
.yield-tile {
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  padding: 1.1rem 1.25rem;
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
}
.yield-tile::before {
  content: "";
  position: absolute; left: 0; top: 0; bottom: 0; width: 3px;
  background: linear-gradient(var(--accent), var(--accent-2));
  opacity: .8;
}
.yield-tile .yt-label {
  color: var(--text-muted);
  font-size: .82rem;
  text-transform: uppercase;
  letter-spacing: .04em;
}
.yield-tile .yt-value {
  font-size: 1.7rem;
  font-weight: 700;
  margin-top: .4rem;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  min-height: 2.1rem;
}
.yield-tile .yt-spec {
  margin-top: .3rem;
  color: var(--accent-2);
  font-size: .9rem;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
  min-height: 1.2rem;
}

/* ── Chart container (fixed height; Chart.js fills it) ────────────────────── */
.chart-box {
  position: relative;
  height: 280px;
  width: 100%;
}
.chart-box canvas { display: block; }

/* ── Detail layout ───────────────────────────────────────────────────────── */
.detail-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}
.kv {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: .55rem 1rem;
  font-size: .92rem;
}
.kv dt { color: var(--text-muted); }
.kv dd { margin: 0; color: var(--text); font-variant-numeric: tabular-nums; }

.back-link {
  display: inline-flex; align-items: center; gap: .35rem;
  color: var(--text-muted); font-size: .88rem; margin-bottom: 1rem;
}
.back-link:hover { color: var(--text); text-decoration: none; }

/* ── Empty / loading states ──────────────────────────────────────────────── */
.empty {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text-dim);
}
.spinner {
  width: 22px; height: 22px;
  border: 2.5px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin .7s linear infinite;
  display: inline-block;
}
@keyframes spin { to { transform: rotate(360deg); } }
.loading-row { text-align: center; padding: 2.5rem; color: var(--text-muted); }

/* ── Login ───────────────────────────────────────────────────────────────── */
.login-screen {
  min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  padding: 1.5rem;
  background:
    radial-gradient(1100px 500px at 85% -10%, rgba(246,166,35,.16), transparent 60%),
    radial-gradient(900px 500px at 0% 110%, rgba(88,166,255,.1), transparent 55%),
    var(--bg);
}
.login-card {
  width: 100%;
  max-width: 400px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: var(--shadow);
  padding: 2.2rem 2rem;
}
.login-brand {
  display: flex; align-items: center; gap: .7rem;
  font-weight: 700; font-size: 1.25rem; letter-spacing: -0.02em;
  margin-bottom: .35rem;
}
.login-brand .mark {
  width: 38px; height: 38px; border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #1a1205;
  display: inline-flex; align-items: center; justify-content: center;
}
.login-card .sub { color: var(--text-muted); font-size: .92rem; margin-bottom: 1.6rem; }
.login-card .field { margin-bottom: 1rem; }
.login-hint { text-align: center; color: var(--text-dim); font-size: .8rem; margin-top: 1.3rem; }

/* ── Misc ────────────────────────────────────────────────────────────────── */
.divider { height: 1px; background: var(--border-soft); margin: 1.25rem 0; border: 0; }
.row-gap { display: flex; gap: .6rem; flex-wrap: wrap; align-items: center; }
.grow { flex: 1; }
.hidden { display: none !important; }

/* ── Responsive ──────────────────────────────────────────────────────────── */
@media (max-width: 820px) {
  .form-grid { grid-template-columns: 1fr; }
  .field.col-2 { grid-column: span 1; }
  .detail-grid { grid-template-columns: 1fr; }
  .yield-tiles { grid-template-columns: repeat(2, 1fr); }
  .kv { grid-template-columns: 130px 1fr; }
  .nav a { padding: .4rem .55rem; font-size: .85rem; }
  .topbar { gap: .75rem; padding: 0 1rem; }
  .brand span.brand-text { display: none; }
  .content { padding: 1.5rem 1rem 3rem; }
}
@media (max-width: 540px) {
  .user-chip .uname { display: none; }
  .yield-tiles { grid-template-columns: 1fr 1fr; gap: .75rem; }
  .yield-tile .yt-value { font-size: 1.45rem; }
  .chart-box { height: 220px; }
}