/* --- SmartEnergy Frontend Theme --- */

:root {
  --bg: #0f1320;
  --card-bg: #1b2134;
  --text: #e8ecf3;
  --accent: #5cc8ff;
  --accent2: #ffe15c;
  --error: #ff6b6b;
  --mock: #9ca3af;
  --radius: 12px;
  --shadow: 0 4px 16px rgba(0, 0, 0, 0.25);
  --transition: 0.2s ease-in-out;
  --max-width: 960px;
  font-family: "Inter", "Segoe UI", Roboto, sans-serif;
}

/* --- Light/Dark Theme --- */
:root[data-theme='light'] {
  --bg: #f8fafc;
  --card-bg: #ffffff;
  --text: #111827;
  --accent: #007aff;
  --accent2: #ff9500;
  --error: #e11d48;
  --mock: #9ca3af;
}

:root[data-theme='dark'] {
  --bg: #0f1320;
  --card-bg: #1b2134;
  --text: #e8ecf3;
  --accent: #5cc8ff;
  --accent2: #ffe15c;
  --error: #ff6b6b;
  --mock: #9ca3af;
}

/* --- Base --- */

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  min-height: 100%;
}

h1, h2, h3 {
  font-weight: 500;
  color: var(--accent);
  margin-top: 0;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--accent2);
}

/* --- Layout --- */

.topbar {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  background: var(--card-bg);
  padding: 12px 24px;
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 10;
}

.topbar h1 {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  margin: 0;
  font-size: 1.4rem;
  text-align: center;
  z-index: 2;
}

.topbar h1 a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition);
}

.topbar h1 a:hover {
  color: var(--accent2);
}

.nav {
  list-style: none;
  display: flex;
  gap: 1rem;
  margin: 0;
  padding: 0;
  justify-self: end;
}

.nav a {
  padding: 6px 10px;
  border-radius: 8px;
}

.nav a:hover {
  background: rgba(255, 255, 255, 0.08);
}

.container {
  max-width: var(--max-width);
  margin: 24px auto;
  padding: 0 16px;
}

/* --- Theme Toggle Button --- */

.theme-btn {
  justify-self: start;
  background: none;
  border: none;
  color: var(--accent);
  font-size: 1.4rem;
  cursor: pointer;
  transition: color var(--transition);
  padding: 4px;
}

.theme-btn:hover {
  color: var(--accent2);
}

/* --- Cards --- */

.card {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px;
  margin-top: 16px;
}

.card .k {
  font-weight: 600;
  color: var(--accent2);
}

.card .v {
  color: var(--text);
  margin-bottom: 8px;
}

/* --- Lists --- */

ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

li {
  padding: 8px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

li:last-child {
  border-bottom: none;
}

.meter-row a {
  display: inline-block;
  padding: 6px 8px;
  border-radius: 6px;
  transition: background var(--transition);
}

.meter-row a:hover {
  background: rgba(255, 255, 255, 0.08);
}

/* --- Badges --- */

.badge {
  display: inline-block;
  padding: 4px 8px;
  border-radius: 8px;
  font-size: 0.85em;
  font-weight: 500;
  color: var(--bg);
  background: var(--mock);
  margin-right: 6px;
}

.badge-live {
  background: var(--accent);
  color: var(--bg);
}

.badge-error {
  background: var(--error);
  color: var(--bg);
}

.badge-mock {
  background: var(--mock);
  color: var(--bg);
}

/* --- Input Group --- */

.input-group {
  display: flex;
  align-items: center;
  margin-top: 12px;
  gap: 8px;
}

input, button {
  padding: 8px 12px;
  border-radius: 6px;
  border: none;
  outline: none;
  font-size: 0.9rem;
}

input {
  flex: 1;
  background: #2a3045;
  color: var(--text);
}

button {
  background: var(--accent);
  color: var(--bg);
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition);
}

button:hover {
  background: var(--accent2);
}

/* --- Charts --- */

canvas {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 8px;
  margin-top: 16px;
}

section#energy-charts {
  padding: 16px 0;
}

/* --- Breadcrumb --- */
.breadcrumb {
  margin-bottom: 12px;
  font-size: 0.9rem;
  color: var(--mock);
}
.breadcrumb a {
  color: var(--accent);
}
.breadcrumb span {
  color: var(--text);
}

/* --- Energy Charts --- */
#energy-charts {
  position: relative;
  height: 400px;
}

@media (max-width: 720px) {
  #energy-charts {
    height: 300px;
  }
}

/* --- Responsive --- */
@media (max-width: 720px) {
  .topbar {
    grid-template-columns: 1fr;
    gap: 8px;
    text-align: center;
  }

  .theme-btn {
    justify-self: center;
  }

  .nav {
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.5rem;
  }

  h1 {
    font-size: 1.2rem;
  }
}

/* --- Tariffs Page --- */

#tariffs-container {
  margin-top: 20px;
}

.tariff-row {
  display: flex;
  flex-direction: column;
  padding: 12px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.tariff-row:last-child {
  border-bottom: none;
}

.tariff-name {
  font-weight: 600;
  color: var(--accent2);
  font-size: 1rem;
  margin-bottom: 4px;
}

.tariff-meta {
  font-size: 0.9rem;
  color: var(--text);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
}

.tariff-meta .price {
  font-weight: 500;
  color: var(--accent);
}

.tariff-meta .site {
  color: var(--mock);
}

/* --- Date Range Controls --- */
.date-range-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  margin-top: 16px;
}
.date-range-controls label {
  display: flex;
  flex-direction: column;
  font-size: 0.9rem;
  color: var(--text);
}
.date-range-controls input[type="date"] {
  background: #2a3045;
  border: none;
  color: var(--text);
  padding: 6px 8px;
  border-radius: 6px;
}
.date-range-controls button.secondary-btn {
  background: var(--card-bg);
  border: 1px solid var(--accent);
  color: var(--accent);
}
.date-range-controls button.secondary-btn:hover {
  background: var(--accent);
  color: var(--bg);
}

/* --- Dashboard Summary Cards --- */
#summary-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-top: 24px;
}

.summary-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px;
  text-align: center;
  transition: transform 0.2s var(--transition);
}
.summary-card:hover {
  transform: translateY(-4px);
}

.summary-card .k {
  font-size: 0.9rem;
  color: var(--accent2);
  margin-bottom: 4px;
}
.summary-card .v {
  font-size: 1.5rem;
  font-weight: 600;
}

.btn-primary {
  display: inline-block;
  padding: 10px 18px;
  background: var(--accent);
  color: var(--bg);
  border-radius: 8px;
  font-weight: 600;
  transition: background var(--transition);
}
.btn-primary:hover {
  background: var(--accent2);
}

/* --- Systems Page --- */
.card {
  background: var(--bg, #fff);
  border-radius: 1rem;
  box-shadow: 0 0 8px rgba(0,0,0,0.1);
  padding: 1rem;
  text-align: center;
}
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1rem;
}
#system-cards canvas {
  width: 100%;
  max-width: 300px;
  height: 220px;
}