/* ============================================================
   Solar Dashboard — main.css
   Light mode default · CMP brand palette · Dark mode toggle
   ============================================================ */

*, *::before, *::after { box-sizing: border-box; }

/* ── CMP brand colors ────────────────────────────────────── */
/* Navy:  #003087  |  Blue: #0067B3  |  Sky: #41B6E6  |  Green: #43B02A */

/* ── Light mode (default) ────────────────────────────────── */
:root {
  --bg-page:    #f4f6f9;
  --bg-card:    #ffffff;
  --bg-panel:   #e8eef7;
  --bg-nav:     #003087;
  --nav-text:   #ffffff;
  --nav-active-bg: #0067B3;
  --nav-hover-bg:  rgba(255,255,255,0.15);
  --text:       #1a1a2e;
  --text-sub:   #444;
  --muted:      #777;
  --border:     #d0d8e8;
  --shadow:     0 1px 4px rgba(0,0,0,0.10);

  --solar:      #E6A800;   /* amber — solar production */
  --grid-in:    #0067B3;   /* CMP blue — grid purchase */
  --export:     #43B02A;   /* CMP green — export/credit */
  --red:        #d32f2f;
  --yellow:     #E6A800;
  --green:      #2E8020;
  --blue:       #0067B3;

  --accent:     #003087;   /* CMP navy */
  --accent2:    #43B02A;   /* CMP green */

  /* chart backgrounds */
  --chart-paper: #ffffff;
  --chart-plot:  #f8fafd;
  --chart-font:  #1a1a2e;
}

/* ── Dark mode ───────────────────────────────────────────── */
[data-theme="dark"] {
  --bg-page:    #1a1a2e;
  --bg-card:    #16213e;
  --bg-panel:   #0f3460;
  --bg-nav:     #0d1b3e;
  --nav-text:   #e0e0e0;
  --nav-active-bg: #0f3460;
  --nav-hover-bg:  rgba(255,255,255,0.08);
  --text:       #e0e0e0;
  --text-sub:   #b0b0b0;
  --muted:      #888;
  --border:     #2a2a4a;
  --shadow:     0 1px 4px rgba(0,0,0,0.40);

  --solar:      #FFC107;
  --grid-in:    #42A5F5;
  --export:     #66BB6A;
  --red:        #EF5350;
  --yellow:     #FFC107;
  --green:      #66BB6A;
  --blue:       #42A5F5;

  --accent:     #41B6E6;
  --accent2:    #66BB6A;

  --chart-paper: #1a1a2e;
  --chart-plot:  #16213e;
  --chart-font:  #e0e0e0;
}

html, body {
  margin: 0; padding: 0;
  background: var(--bg-page);
  color: var(--text);
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  font-size: 14px;
  line-height: 1.5;
  transition: background 0.2s, color 0.2s;
}

/* ── Navbar ─────────────────────────────────────────────── */
.navbar {
  display: flex;
  align-items: center;
  gap: 24px;
  background: var(--bg-nav);
  border-bottom: 3px solid var(--accent2);
  padding: 0 24px;
  height: 52px;
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-brand {
  font-size: 16px;
  font-weight: 700;
  color: #ffffff;
  white-space: nowrap;
}
.sun-icon { margin-right: 6px; color: #FFC107; }

.nav-links {
  display: flex;
  list-style: none;
  margin: 0; padding: 0;
  gap: 4px;
  flex: 1;
}
.nav-links a {
  display: block;
  padding: 6px 14px;
  color: var(--nav-text);
  text-decoration: none;
  border-radius: 6px;
  transition: background 0.15s;
  font-size: 13px;
  opacity: 0.85;
}
.nav-links a:hover { background: var(--nav-hover-bg); opacity: 1; }
.nav-links a.active { background: var(--nav-active-bg); opacity: 1; font-weight: 600; }

.nav-right {
  display: flex;
  align-items: center;
  gap: 14px;
}

.nav-system {
  font-size: 12px;
  color: rgba(255,255,255,0.65);
  white-space: nowrap;
}

/* Theme toggle button */
.theme-toggle {
  background: none;
  border: 1px solid rgba(255,255,255,0.35);
  color: #fff;
  border-radius: 20px;
  padding: 4px 12px;
  font-size: 12px;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.15s, border-color 0.15s;
  display: flex;
  align-items: center;
  gap: 5px;
}
.theme-toggle:hover { background: rgba(255,255,255,0.12); border-color: rgba(255,255,255,0.6); }

/* ── Layout ─────────────────────────────────────────────── */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 28px 24px 60px;
}

.page-title {
  font-size: 22px;
  font-weight: 700;
  margin: 0 0 24px;
  color: var(--accent);
}

.muted { color: var(--muted); }

/* ── Stat cards ─────────────────────────────────────────── */
.stat-row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 32px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px 20px;
  min-width: 160px;
  flex: 1;
  box-shadow: var(--shadow);
}

.stat-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  margin-bottom: 6px;
}

.stat-value {
  font-size: 26px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.1;
}
.stat-value .unit { font-size: 14px; font-weight: 400; color: var(--muted); }
.stat-value.green { color: var(--green); }

/* card accent borders */
.stat-card.solar   { border-top: 3px solid var(--solar); }
.stat-card.home    { border-top: 3px solid #7b51c8; }
.stat-card.grid    { border-top: 3px solid var(--blue); }
.stat-card.export  { border-top: 3px solid var(--export); }
.stat-card.self    { border-top: 3px solid var(--solar); }
.stat-card.savings { border-top: 3px solid var(--export); }
.stat-card.co2     { border-top: 3px solid #00897b; }

/* ── Chart sections ─────────────────────────────────────── */
.chart-section {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px 24px;
  margin-bottom: 24px;
  box-shadow: var(--shadow);
}

.chart-section h2 {
  font-size: 15px;
  font-weight: 600;
  margin: 0 0 16px;
  color: var(--text);
}

/* ── Energy flow diagram ─────────────────────────────────── */
.flow-diagram {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px;
  padding: 20px 0;
}

.flow-node {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 20px;
  text-align: center;
  min-width: 140px;
  box-shadow: var(--shadow);
}

.flow-icon { font-size: 28px; margin-bottom: 6px; }
.flow-label { font-size: 13px; font-weight: 600; color: var(--text); margin-bottom: 4px; }
.flow-value { font-size: 16px; font-weight: 700; margin-bottom: 2px; }
.flow-sub { font-size: 11px; color: var(--muted); }

.solar-node .flow-icon   { color: var(--solar); }
.home-node  .flow-icon   { color: var(--blue); }
.grid-node  .flow-icon   { color: var(--export); }
.cascade-node .flow-icon { color: #7b51c8; }

.net-credit { color: var(--green); }
.net-charge { color: var(--blue); }

/* flow arrows */
.flow-arrows {
  display: flex;
  align-items: center;
  padding: 0 4px;
}
.flow-arrow-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.flow-arrow {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  white-space: nowrap;
}
.flow-arrow.right { flex-direction: row; }
.flow-arrow.left  { flex-direction: row-reverse; }
.arrow-line { font-size: 20px; color: var(--muted); }
.arrow-label { color: var(--muted); font-size: 11px; }
.arrow-value { color: var(--text); font-weight: 600; font-size: 12px; }
.export-arrow .arrow-line { color: var(--export); }
.grid-arrow   .arrow-line { color: var(--blue); }

/* edu-flow (education page) */
.edu-flow { justify-content: flex-start; }
.cascade-flow { flex-wrap: nowrap; overflow-x: auto; }

/* ── Data tables ─────────────────────────────────────────── */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.data-table th {
  background: var(--bg-panel);
  color: var(--muted);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 10px 12px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.data-table td {
  padding: 9px 12px;
  border-bottom: 1px solid var(--border);
  color: var(--text);
}

.data-table tr:last-child td { border-bottom: none; }
.data-table tr:hover td { background: var(--bg-panel); }

.data-table .yellow { color: var(--yellow); }
.data-table .green  { color: var(--green); }
.data-table .blue   { color: var(--blue); }
.data-table .red    { color: var(--red); }

/* ── Badges (daily view) ─────────────────────────────────── */
.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 600;
}
.badge-export { background: rgba(67,176,42,0.15); color: var(--green); }
.badge-solar  { background: rgba(230,168,0,0.15); color: #b37d00; }
.badge-grid   { background: rgba(0,103,179,0.12); color: var(--blue); }
.badge-zero   { background: var(--bg-panel);      color: var(--muted); }

[data-theme="dark"] .badge-export { background: rgba(102,187,106,0.2); color: #66BB6A; }
[data-theme="dark"] .badge-solar  { background: rgba(255,193,7,0.2);   color: #FFC107; }
[data-theme="dark"] .badge-grid   { background: rgba(66,165,245,0.2);  color: #42A5F5; }
[data-theme="dark"] .badge-zero   { background: rgba(224,224,224,0.1); color: #888; }

/* ── Date select (daily page) ────────────────────────────── */
.date-select {
  background: var(--bg-card);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 10px;
  font-size: 13px;
  cursor: pointer;
}
.date-select:focus { outline: none; border-color: var(--accent); }

/* ── Education page ──────────────────────────────────────── */
.edu-section {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 28px 32px;
  margin-bottom: 24px;
  box-shadow: var(--shadow);
}

.edu-section h2 {
  font-size: 18px;
  font-weight: 700;
  color: var(--accent);
  margin: 0 0 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}

.edu-section h3 {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  margin: 22px 0 10px;
}

.edu-section p {
  color: var(--text-sub);
  margin: 0 0 16px;
  line-height: 1.7;
}

/* callout boxes */
.callout {
  border-radius: 8px;
  padding: 14px 18px;
  margin: 16px 0;
  font-size: 13px;
  line-height: 1.6;
  border-left: 4px solid;
}
.callout-blue   { background: rgba(0,103,179,0.08);  border-color: #0067B3; color: #004a88; }
.callout-green  { background: rgba(67,176,42,0.08);  border-color: #43B02A; color: #2a6e1a; }
.callout-yellow { background: rgba(230,168,0,0.10);  border-color: #E6A800; color: #7a5800; }
.callout-red    { background: rgba(211,47,47,0.08);  border-color: #d32f2f; color: #a01010; }

.callout strong { color: var(--text); }

[data-theme="dark"] .callout-blue   { background: rgba(66,165,245,0.1);  border-color: #42A5F5; color: #b3d9ff; }
[data-theme="dark"] .callout-green  { background: rgba(102,187,106,0.1); border-color: #66BB6A; color: #c8e6c9; }
[data-theme="dark"] .callout-yellow { background: rgba(255,193,7,0.1);   border-color: #FFC107; color: #fff9c4; }
[data-theme="dark"] .callout-red    { background: rgba(239,83,80,0.1);   border-color: #EF5350; color: #ffcdd2; }

/* example box */
.example-box {
  background: var(--bg-page);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  margin: 12px 0;
}

.example-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 16px;
  border-bottom: 1px solid var(--border);
}
.example-row:last-child { border-bottom: none; }
.example-row.divider { border-top: 2px solid var(--border); }

.ex-label { color: var(--muted); font-size: 13px; }
.ex-value { font-size: 14px; font-weight: 600; color: var(--text); }
.ex-value.green  { color: var(--green); }
.ex-value.blue   { color: var(--blue); }
.ex-value.yellow { color: var(--yellow); }
.ex-value.red    { color: var(--red); }

/* reason list (why bills) */
.reason-list { display: flex; flex-direction: column; gap: 12px; margin: 16px 0; }
.reason-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  background: var(--bg-page);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px 16px;
}
.reason-icon { font-size: 22px; flex-shrink: 0; line-height: 1; }
.reason-text { font-size: 13px; line-height: 1.6; color: var(--text-sub); }
.reason-text strong { color: var(--text); }

/* FAQ */
.faq-list { display: flex; flex-direction: column; gap: 2px; }
.faq-item {
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  margin-bottom: 8px;
}
.faq-q {
  background: var(--bg-panel);
  padding: 12px 16px;
  font-weight: 600;
  font-size: 13px;
  color: var(--accent);
}
.faq-a {
  padding: 12px 16px;
  font-size: 13px;
  color: var(--text-sub);
  line-height: 1.6;
  background: var(--bg-card);
}

/* ── Empty state ─────────────────────────────────────────── */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--muted);
  font-size: 15px;
}

/* ── Colour utility classes ──────────────────────────────── */
.yellow { color: var(--yellow); }
.green  { color: var(--green); }
.blue   { color: var(--blue); }
.red    { color: var(--red); }

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 900px) {
  .stat-card { min-width: 140px; }
  .flow-diagram { flex-direction: column; }
  .edu-section { padding: 20px 18px; }
}

@media (max-width: 600px) {
  .navbar { gap: 12px; padding: 0 12px; }
  .nav-system { display: none; }
  .container { padding: 16px 12px 40px; }
  .stat-row { gap: 10px; }
  .stat-value { font-size: 20px; }
}