/* BMS Dashboard - Compact Enterprise Light Theme (Yeastar Inspired) */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&display=swap');

:root {
    --bg-primary: #f0f2f5;
    --bg-secondary: #ffffff;
    --bg-card: #ffffff;
    --bg-card-hover: #f9f9f9;
    --bg-input: #ffffff;
    --border: #e2e8f0;
    --border-focus: #1890ff;
    --text-primary: #1d1d1f;
    --text-secondary: #5f6368;
    --text-muted: #8c8c8c;
    --accent: #1890ff;
    --accent-light: #40a9ff;
    --accent-dark: #096dd9;
    --success: #52c41a;
    --success-bg: #f6ffed;
    --success-border: #b7eb8f;
    --warning: #faad14;
    --warning-bg: #fffbe6;
    --warning-border: #ffe58f;
    --danger: #ff4d4f;
    --danger-bg: #fff1f0;
    --danger-border: #ffa39e;
    --info: #1890ff;
    --info-bg: #e6f7ff;
    --info-border: #91d5ff;
    --sidebar-width: 220px;
    --radius: 4px;
    /* Harder corners for SaaS look */
    --shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
}

*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    font-size: 13px;
    /* Compact font size */
    line-height: 1.5;
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: color .2s;
}

a:hover {
    color: var(--accent-light);
}

/* ===== SIDEBAR ===== */
:root {
    --sidebar-collapsed-width: 72px;
}

.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    z-index: 100;
    box-shadow: 1px 0 5px rgba(0, 0, 0, 0.02);
    transition: width 0.3s ease, transform 0.3s ease;
    overflow-x: hidden;
    white-space: nowrap;
}

/* Collapsed Sidebar Logic */
.sidebar.collapsed {
    width: var(--sidebar-collapsed-width);
}

.sidebar.collapsed .brand-text,
.sidebar.collapsed .nav-section-title,
.sidebar.collapsed .link-text,
.sidebar.collapsed .user-details-block {
    display: none;
    opacity: 0;
}

.sidebar.collapsed .sidebar-brand {
    padding: 20px 0 16px 0;
}

.sidebar.collapsed .nav-link {
    padding: 12px 0;
    justify-content: center;
}

.sidebar.collapsed .sidebar-footer {
    padding: 16px 0;
    justify-content: center;
    text-align: center;
}

.sidebar.collapsed .sidebar-footer .user-info {
    justify-content: center;
}

.sidebar.collapsed .sidebar-footer .avatar {
    border-radius: 50%;
}

.sidebar.collapsed .logout-btn .icon {
    font-size: 1.2rem;
}


.sidebar-brand {
    padding: 24px 16px 16px 16px;
    border-bottom: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 12px;
    background: #fcfcfc;
}

.sidebar-brand .logo {
    width: 28px;
    height: 28px;
    background: var(--accent);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 14px;
    color: #fff;
}

.sidebar-brand h2 {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.sidebar-brand span {
    font-size: 11px;
    color: var(--text-muted);
    display: block;
    line-height: 1;
    margin-top: 2px;
}

.sidebar-nav {
    flex: 1;
    padding: 12px 8px;
    overflow-y: auto;
}

.nav-section {
    margin-bottom: 16px;
}

.nav-section-title {
    font-size: 11px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    padding: 0 12px;
    margin-bottom: 6px;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 12px;
    border-radius: var(--radius);
    color: var(--text-secondary);
    font-size: 13px;
    font-weight: 500;
    transition: all .2s;
    margin-bottom: 2px;
}

.nav-link:hover {
    background: var(--bg-primary);
    color: var(--text-primary);
}

.nav-link.active {
    background: var(--info-bg);
    color: var(--accent-dark);
    font-weight: 600;
}

.nav-link .icon {
    width: 16px;
    text-align: center;
    font-size: 14px;
}

.sidebar-footer {
    padding: 12px 16px;
    border-top: 1px solid var(--border);
    background: #fbfbfb;
}

.sidebar-footer .user-info {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
}

.sidebar-footer .avatar {
    width: 28px;
    height: 28px;
    border-radius: var(--radius);
    background: var(--border);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 12px;
    border: 1px solid #d9d9d9;
}

.sidebar-footer .user-name {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1;
}

.sidebar-footer .user-role {
    font-size: 11px;
    color: var(--text-muted);
    margin-top: 2px;
}

/* ===== MAIN CONTENT ===== */
.main-content {
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    padding: 20px 24px;
    transition: margin-left 0.3s ease;
}

/* Desktop Expansion */
@media (min-width: 769px) {
    .main-content {
        margin-left: var(--sidebar-width);
    }

    .main-content.collapsed {
        margin-left: var(--sidebar-collapsed-width);
    }
}

/* Mobile Drawers */
.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 90;
    backdrop-filter: blur(2px);
    transition: opacity 0.3s;
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        width: var(--sidebar-width) !important;
        z-index: 100;
    }

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

    .sidebar .brand-text,
    .sidebar .nav-section-title,
    .sidebar .link-text,
    .sidebar .user-details-block {
        display: block !important;
        opacity: 1 !important;
    }

    .sidebar .nav-link {
        justify-content: flex-start !important;
        padding: 10px 14px !important;
    }

    .main-content {
        margin-left: 0 !important;
        padding: 14px 16px;
    }

    .main-content.collapsed {
        margin-left: 0 !important;
    }

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

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.page-header h1 {
    font-size: 20px;
    font-weight: 600;
    margin: 0;
    color: #000;
}

.page-header .breadcrumb {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 4px;
    display: block;
}

/* ===== CARDS ===== */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px;
    box-shadow: var(--shadow);
    transition: box-shadow .2s;
    margin-bottom: 16px;
}

.card:hover {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.09);
}

.card h3 {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 16px;
    margin-bottom: 20px;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    box-shadow: var(--shadow);
}

.stat-card .stat-label {
    font-size: 12px;
    color: var(--text-secondary);
    font-weight: 500;
}

.stat-card .stat-value {
    font-size: 24px;
    font-weight: 600;
    color: #000;
}

.stat-card .stat-icon {
    display: none;
}

/* Hide emojis in pro enterprise theme */
.stat-card.accent {
    border-top: 3px solid var(--accent);
}

.stat-card.success {
    border-top: 3px solid var(--success);
}

.stat-card.warning {
    border-top: 3px solid var(--warning);
}

.stat-card.danger {
    border-top: 3px solid var(--danger);
}

.stat-card.info {
    border-top: 3px solid var(--info);
}

/* ===== TABLES ===== */
.table-container {
    overflow-x: auto;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    background: var(--bg-secondary);
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}

thead {
    background: #fafafa;
    border-bottom: 1px solid var(--border);
}

th {
    padding: 10px 12px;
    text-align: left;
    font-weight: 600;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
}

td {
    padding: 10px 12px;
    border-bottom: 1px solid #f0f0f0;
    color: var(--text-primary);
}

tr:hover {
    background: #fafafa;
}

tr:last-child td {
    border-bottom: none;
}

code {
    font-family: 'Courier New', monospace;
    font-size: 12px;
    background: #f5f5f5;
    padding: 2px 4px;
    border-radius: 3px;
    border: 1px solid #e8e8e8;
}

/* ===== BADGES ===== */
.badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 11px;
    font-weight: 500;
    border: 1px solid transparent;
}

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

.badge-warning {
    background: var(--warning-bg);
    border-color: var(--warning-border);
    color: #d48806;
}

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

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

.badge-muted {
    background: #f5f5f5;
    border-color: #d9d9d9;
    color: var(--text-secondary);
}

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 6px 14px;
    border-radius: var(--radius);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all .2s;
    border: 1px solid transparent;
    font-family: inherit;
    line-height: 1.5;
    white-space: nowrap;
}

.btn-primary {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
}

.btn-primary:hover {
    background: var(--accent-light);
    border-color: var(--accent-light);
    color: #fff;
}

.btn-success {
    background: var(--success);
    color: #fff;
    border-color: var(--success);
}

.btn-success:hover {
    background: #73d13d;
    border-color: #73d13d;
}

.btn-danger {
    background: var(--danger);
    color: #fff;
    border-color: var(--danger);
}

.btn-danger:hover {
    background: #ff7875;
    border-color: #ff7875;
}

.btn-outline {
    background: #fff;
    border-color: #d9d9d9;
    color: var(--text-primary);
}

.btn-outline:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.btn-sm {
    padding: 4px 10px;
    font-size: 12px;
}

.btn-link {
    background: none;
    border: none;
    color: var(--accent);
    padding: 0;
    font-size: 13px;
    cursor: pointer;
}

.btn-link:hover {
    color: var(--accent-light);
}

/* ===== FORMS ===== */
.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.form-control {
    width: 100%;
    padding: 6px 11px;
    border-radius: var(--radius);
    background: var(--bg-input);
    border: 1px solid #d9d9d9;
    color: var(--text-primary);
    font-size: 13px;
    font-family: inherit;
    transition: all .2s;
    line-height: 1.5;
}

.form-control:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 2px rgba(24, 144, 255, 0.2);
}

.form-control::placeholder {
    color: #bfbfbf;
}

.validation-message {
    font-size: 12px;
    color: var(--danger);
    margin-top: 4px;
    display: block;
}

/* ===== ALERTS ===== */
.alert {
    padding: 10px 16px;
    border-radius: var(--radius);
    font-size: 13px;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
    border: 1px solid transparent;
}

.alert-success {
    background: var(--success-bg);
    color: var(--success);
    border-color: var(--success-border);
}

.alert-danger {
    background: var(--danger-bg);
    color: var(--danger);
    border-color: var(--danger-border);
}

.alert-warning {
    background: var(--warning-bg);
    color: #d48806;
    border-color: var(--warning-border);
}

.alert-info {
    background: var(--info-bg);
    color: var(--info);
    border-color: var(--info-border);
}

/* ===== AUTH PAGES ===== */
.auth-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f0f2f5 url('data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSI0MCIgaGVpZ2h0PSI0MCI+PHBhdGggZD0iTTAgMGg0MHY0MEgwem0yMCAyMGMxMSAwIDIwLTkgMjAtMjBoLTQwYzAgMTEgOSAyMCAyMCAyMHptMCAyMGMtMTEgMC0yMC05LTIwLTIwaDQwYzAgMTEtOSAyMC0yMCAyMHoiIGZpbGw9IiNlMmU4ZjAiIGZpbGwtb3BhY2l0eT0iMC40IiBmaWxsLXJ1bGU9ImV2ZW5vZGQiLz48L3N2Zz4=');
}

.auth-card {
    width: 380px;
    padding: 32px 28px;
    background: var(--bg-card);
    border: 1px solid #d9d9d9;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    /* slightly softer shadow for auth */
}

.auth-card .auth-logo {
    text-align: center;
    margin-bottom: 24px;
}

.auth-card .auth-logo h1 {
    font-size: 22px;
    font-weight: 600;
    color: #000;
}

.auth-card .auth-logo h1 span {
    color: var(--accent);
}

.auth-card .auth-logo p {
    font-size: 13px;
    color: var(--text-secondary);
    margin-top: 4px;
}

.auth-card .auth-footer {
    text-align: center;
    margin-top: 20px;
    font-size: 13px;
    color: var(--text-secondary);
}

/* ===== DEVICE GRID ===== */
.device-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 16px;
}

.device-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px;
    cursor: pointer;
    transition: all .2s;
    box-shadow: var(--shadow);
}

.device-card:hover {
    border-color: var(--accent);
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.09);
}

.device-card .device-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 8px;
}

.device-card .device-name {
    font-size: 15px;
    font-weight: 600;
    color: var(--accent-dark);
}

.device-card .device-sn {
    font-size: 12px;
    color: var(--text-secondary);
    font-family: 'Courier New', monospace;
    background: #f5f5f5;
    padding: 2px 6px;
    border-radius: 4px;
    display: inline-block;
    margin-bottom: 12px;
}

.device-card .device-meta {
    display: flex;
    flex-direction: column;
    gap: 4px;
    font-size: 12px;
    color: var(--text-secondary);
    border-top: 1px dashed #e8e8e8;
    padding-top: 10px;
}

/* ===== TELEMETRY PANELS (DENSE DATA) ===== */
.snapshot-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 16px;
    margin-bottom: 20px;
}

.snapshot-panel {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 12px 16px;
}

.snapshot-panel h3 {
    font-size: 13px;
    font-weight: 600;
    color: #000;
    margin-bottom: 12px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border);
}

.snapshot-row {
    display: flex;
    justify-content: space-between;
    padding: 4px 0;
    font-size: 13px;
    border-bottom: 1px solid #f9f9f9;
}

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

.snapshot-row .label {
    color: var(--text-secondary);
}

.snapshot-row .value {
    font-weight: 500;
    color: var(--text-primary);
}

.cell-voltage-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
    gap: 8px;
    margin-top: 8px;
}

.cell-voltage-box {
    background: #fafafa;
    padding: 6px 8px;
    border-radius: 4px;
    text-align: center;
    border: 1px solid #f0f0f0;
}

.cell-voltage-box .cell-label {
    font-size: 11px;
    color: var(--text-secondary);
    margin-bottom: 2px;
}

.cell-voltage-box .cell-value {
    font-size: 14px;
    font-weight: 600;
    font-family: 'Courier New', monospace;
    color: var(--accent-dark);
}

/* ===== PAGINATION ===== */
.pagination {
    display: flex;
    gap: 4px;
    justify-content: flex-end;
    margin-top: 16px;
}

.pagination a,
.pagination span {
    min-width: 32px;
    height: 32px;
    padding: 0 10px;
    border-radius: var(--radius);
    font-size: 13px;
    border: 1px solid var(--border);
    color: var(--text-primary);
    background: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all .2s;
}

.pagination a:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.pagination .active {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
    font-weight: 600;
}

.pagination .disabled {
    opacity: .5;
    pointer-events: none;
    background: #f5f5f5;
}

/* ===== EMPTY STATE ===== */
.empty-state {
    text-align: center;
    padding: 48px 20px;
}

.empty-state .icon {
    font-size: 32px;
    margin-bottom: 12px;
    opacity: .4;
}

.empty-state h3 {
    font-size: 16px;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.empty-state p {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }

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

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

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

    .auth-card {
        width: 90%;
        padding: 24px;
    }
}