/* ================================================================
   Siton Monitor — Main Stylesheet
   Extends Bootstrap 5.3 with solar-themed custom styles.
   IMPORTANT: Do NOT override Bootstrap class names directly.
   ================================================================ */

/* ── CSS Custom Properties ────────────────────────────────────── */
:root {
    /* Primary — solar green */
    --color-primary:          #2e7d32;
    --color-primary-light:    #4caf50;
    --color-primary-dark:     #1b5e20;
    --color-primary-bg:       #e8f5e9;

    /* Accent — solar orange */
    --color-accent:           #e65100;
    --color-accent-light:     #ff9800;
    --color-accent-dark:      #bf360c;
    --color-accent-bg:        #fff3e0;

    /* Sidebar */
    --sidebar-bg:             #1a2332;
    --sidebar-bg-hover:       #243044;
    --sidebar-text:           #b0bec5;
    --sidebar-text-active:    #ffffff;
    --sidebar-width:          250px;
    --sidebar-collapsed:      0px;

    /* Neutrals */
    --color-bg:               #f5f7fa;
    --color-surface:          #ffffff;
    --color-border:           #e0e4e8;
    --color-text:             #333333;
    --color-text-muted:       #78909c;
    --color-text-light:       #b0bec5;

    /* Status */
    --color-success:          #2e7d32;
    --color-danger:           #c62828;
    --color-warning:          #f57f17;
    --color-info:             #0277bd;

    /* Shadows */
    --shadow-sm:              0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md:              0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg:              0 8px 24px rgba(0, 0, 0, 0.12);

    /* Radius */
    --radius-sm:              4px;
    --radius-md:              8px;
    --radius-lg:              12px;

    /* Transitions */
    --transition-fast:        0.15s ease;
    --transition-base:        0.25s ease;

    /* Bootstrap overrides via CSS vars */
    --bs-primary:             #2e7d32;
    --bs-primary-rgb:         46, 125, 50;
    --bs-success:             #2e7d32;
    --bs-success-rgb:         46, 125, 50;
}

/* ── Base enhancements ───────────────────────────────────────── */
body {
    font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: var(--color-primary);
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-primary-dark);
}

/* ── Bootstrap btn-primary color override ─────────────────────── */
.btn-primary {
    --bs-btn-bg: #2e7d32;
    --bs-btn-border-color: #2e7d32;
    --bs-btn-hover-bg: #1b5e20;
    --bs-btn-hover-border-color: #1b5e20;
    --bs-btn-active-bg: #1b5e20;
    --bs-btn-active-border-color: #1b5e20;
}

.btn-outline-primary {
    --bs-btn-color: #2e7d32;
    --bs-btn-border-color: #2e7d32;
    --bs-btn-hover-bg: #2e7d32;
    --bs-btn-hover-border-color: #2e7d32;
    --bs-btn-active-bg: #1b5e20;
}

/* Custom accent button (not a Bootstrap class) */
.btn-accent {
    background: var(--color-accent);
    color: #ffffff;
    border-color: var(--color-accent);
}

.btn-accent:hover {
    background: var(--color-accent-dark);
    border-color: var(--color-accent-dark);
    color: #ffffff;
}

/* ── Layout: Sidebar + Main Content (Dashboard) ──────────────── */
.app-wrapper {
    display: flex;
    min-height: 100vh;
}

.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: 24px 32px;
    min-width: 0;
    transition: margin-left var(--transition-base);
}

/* ── Sidebar ──────────────────────────────────────────────────── */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--sidebar-bg);
    color: var(--sidebar-text);
    overflow-y: auto;
    overflow-x: hidden;
    z-index: 1000;
    transition: transform var(--transition-base), width var(--transition-base);
    display: flex;
    flex-direction: column;
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 20px 20px 16px;
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--sidebar-text-active);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    text-decoration: none;
}

.sidebar-brand:hover {
    color: var(--sidebar-text-active);
}

.sidebar-brand .brand-icon {
    width: 32px;
    height: 32px;
    background: var(--color-primary);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    flex-shrink: 0;
}

.sidebar-nav {
    list-style: none;
    margin: 0;
    padding: 12px 0;
    flex: 1;
}

.sidebar-nav li {
    margin: 2px 8px;
}

.sidebar-nav a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 16px;
    color: var(--sidebar-text);
    border-radius: var(--radius-md);
    transition: background var(--transition-fast), color var(--transition-fast);
    font-size: 0.875rem;
    font-weight: 500;
    text-decoration: none;
}

.sidebar-nav a:hover {
    background: var(--sidebar-bg-hover);
    color: var(--sidebar-text-active);
}

.sidebar-nav a.active {
    background: var(--color-primary);
    color: #ffffff;
}

.sidebar-nav a .nav-icon {
    width: 20px;
    text-align: center;
    font-size: 1rem;
    flex-shrink: 0;
    opacity: 0.8;
}

.sidebar-nav a.active .nav-icon {
    opacity: 1;
}

.sidebar-section-title {
    padding: 16px 20px 6px;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-text-light);
    opacity: 0.6;
}

.sidebar-footer {
    padding: 16px 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    font-size: 0.8rem;
}

/* ── Top Bar (dashboard header) ──────────────────────────────── */
.top-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 0 20px;
    margin-bottom: 8px;
}

.top-bar-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text);
    margin: 0;
}

.top-bar-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

/* Mobile menu toggle */
.sidebar-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--color-text);
    font-size: 1.4rem;
    cursor: pointer;
    padding: 8px;
    border-radius: var(--radius-sm);
    transition: background var(--transition-fast);
}

.sidebar-toggle:hover {
    background: var(--color-border);
}

/* ── Stat cards (dashboard summary) ──────────────────────────── */
.stat-card {
    text-align: center;
    padding: 24px 16px;
}

.stat-card .stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1.2;
}

.stat-card .stat-label {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-top: 4px;
}

.stat-card.accent .stat-value {
    color: var(--color-accent);
}

/* ── Inverter Cards ───────────────────────────────────────────── */
.inverter-card {
    position: relative;
    overflow: hidden;
}

.inverter-card .inverter-card-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    margin-bottom: 16px;
}

.inverter-card .inverter-name {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-text);
    margin: 0;
}

.inverter-card .inverter-location {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    margin-top: 2px;
}

.inverter-card .inverter-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-top: 12px;
}

.inverter-card .inverter-stat-item {
    text-align: center;
    padding: 10px;
    background: var(--color-bg);
    border-radius: var(--radius-md);
}

.inverter-card .inverter-stat-value {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--color-primary-dark);
}

.inverter-card .inverter-stat-label {
    font-size: 0.7rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.inverter-card .inverter-card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 16px;
    padding-top: 12px;
    border-top: 1px solid var(--color-border);
    font-size: 0.8rem;
}

/* Grid of inverter cards */
.inverter-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 20px;
}

/* Gallery variant */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 24px;
}

/* ── Online/Offline badges (custom classes) ───────────────────── */
.badge-online {
    background-color: var(--color-primary-bg) !important;
    color: var(--color-success) !important;
}

.badge-offline {
    background-color: #ffebee !important;
    color: var(--color-danger) !important;
}

/* ── Charts ───────────────────────────────────────────────────── */
.chart-container {
    position: relative;
    width: 100%;
    min-height: 300px;
    padding: 16px 0;
}

.chart-container canvas {
    width: 100% !important;
    max-height: 400px;
}

.chart-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 12px;
}

.chart-range-selector {
    display: inline-flex;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.chart-range-selector button {
    padding: 6px 14px;
    font-size: 0.78rem;
    font-weight: 500;
    background: var(--color-surface);
    border: none;
    border-right: 1px solid var(--color-border);
    color: var(--color-text-muted);
    cursor: pointer;
    transition: background var(--transition-fast), color var(--transition-fast);
}

.chart-range-selector button:last-child {
    border-right: none;
}

.chart-range-selector button:hover {
    background: var(--color-bg);
}

.chart-range-selector button.active {
    background: var(--color-primary);
    color: #ffffff;
}

/* ── Language Switcher ────────────────────────────────────────── */
.lang-switcher {
    display: inline-flex;
    align-items: center;
    gap: 2px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    overflow: hidden;
    background: var(--color-surface);
}

.lang-switcher a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 4px 10px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--color-text-muted);
    text-decoration: none;
    transition: background var(--transition-fast), color var(--transition-fast);
}

.lang-switcher a:hover {
    background: var(--color-bg);
    color: var(--color-text);
}

.lang-switcher a.active {
    background: var(--color-primary);
    color: #ffffff;
}

/* ── Auth form container ─────────────────────────────────────── */
.auth-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px 20px;
    background: linear-gradient(135deg, var(--color-primary-bg) 0%, var(--color-bg) 50%, var(--color-accent-bg) 100%);
}

.auth-card {
    width: 100%;
    max-width: 440px;
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    padding: 40px 36px;
}

.auth-card .auth-title {
    text-align: center;
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--color-text);
    margin: 0 0 8px;
}

.auth-card .auth-subtitle {
    text-align: center;
    color: var(--color-text-muted);
    font-size: 0.875rem;
    margin-bottom: 28px;
}

.auth-card .auth-logo {
    text-align: center;
    margin-bottom: 24px;
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--color-primary);
}

.auth-links {
    text-align: center;
    margin-top: 20px;
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.auth-links a {
    font-weight: 500;
}

/* ── Flash Messages (custom class) ───────────────────────────── */
.flash-message {
    position: relative;
    padding: 14px 42px 14px 18px;
    border-radius: var(--radius-md);
    margin-bottom: 20px;
    font-size: 0.875rem;
    line-height: 1.5;
    animation: flashSlideIn 0.3s ease;
}

.flash-message.flash-success {
    background: var(--color-primary-bg);
    color: var(--color-success);
    border-left: 4px solid var(--color-success);
}

.flash-message.flash-danger {
    background: #ffebee;
    color: var(--color-danger);
    border-left: 4px solid var(--color-danger);
}

.flash-message.flash-warning {
    background: #fff8e1;
    color: var(--color-warning);
    border-left: 4px solid var(--color-warning);
}

.flash-message.flash-info {
    background: #e1f5fe;
    color: var(--color-info);
    border-left: 4px solid var(--color-info);
}

.flash-message .flash-close {
    position: absolute;
    top: 10px;
    right: 12px;
    background: none;
    border: none;
    font-size: 1.1rem;
    color: inherit;
    cursor: pointer;
    opacity: 0.6;
    padding: 4px;
    line-height: 1;
}

.flash-message .flash-close:hover {
    opacity: 1;
}

@keyframes flashSlideIn {
    from { opacity: 0; transform: translateY(-8px); }
    to   { opacity: 1; transform: translateY(0); }
}

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

.empty-state .empty-icon {
    font-size: 3rem;
    margin-bottom: 16px;
    opacity: 0.4;
}

.empty-state h3 {
    font-size: 1.1rem;
    color: var(--color-text);
    margin-bottom: 8px;
}

.empty-state p {
    font-size: 0.875rem;
    max-width: 400px;
    margin: 0 auto 20px;
}

/* ── Grid helpers (custom classes, don't conflict) ────────────── */
.grid {
    display: grid;
    gap: 20px;
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* ── Overlay for mobile sidebar ───────────────────────────────── */
.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 999;
}

.sidebar-overlay.active {
    display: block;
}

/* ── Admin tables — subtle striping ──────────────────────────── */
.table-admin tbody tr:hover {
    background: rgba(46, 125, 50, 0.03);
}

/* ══════════════════════════════════════════════════════════════════
   Responsive
   ══════════════════════════════════════════════════════════════════ */
@media (max-width: 991px) {
    .sidebar {
        transform: translateX(-100%);
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .main-content {
        margin-left: 0;
        padding: 16px 20px;
    }

    .sidebar-toggle {
        display: inline-flex;
    }

    .grid-4 { grid-template-columns: repeat(2, 1fr); }
    .grid-3 { grid-template-columns: repeat(2, 1fr); }

    .inverter-grid {
        grid-template-columns: 1fr;
    }

    .gallery-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 575px) {
    .auth-card {
        padding: 28px 20px;
    }

    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }

    .top-bar {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }

    .chart-toolbar {
        flex-direction: column;
        align-items: flex-start;
    }
}