@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;600&family=Outfit:wght@500;600;700;800&family=Plus+Jakarta+Sans:wght@400;500;600;700;800&display=swap');

:root {
    /* Main Light Theme Backgrounds - Clean, Professional & High Contrast */
    --bg-dark: #f8fafc;
    --bg-body: #f1f5f9;
    --bg-panel: #ffffff;
    --bg-card: #ffffff;
    --bg-card-hover: #f8fafc;
    --bg-input: #f8fafc;
    --bg-subtle: #f1f5f9;
    
    /* Primary Emerald Brand Colors */
    --bg-featured: #1b4d3e;
    --bg-featured-hover: #143a2f;
    
    /* Borders */
    --border: #e2e8f0;
    --border-soft: #f1f5f9;
    --border-accent: rgba(27, 77, 62, 0.2);
    
    /* High-Contrast Typography Hierarchy */
    --text-main: #0f172a;
    --text-heading: #1e293b;
    --text-muted: #64748b;
    --text-dim: #94a3b8;
    
    /* Accents */
    --accent: #1b4d3e;
    --accent-light: #22c55e;
    --accent-lime: #16a34a;
    --accent-cyan: #0284c7;
    --accent-royal: #2563eb;
    --accent-glow: 0 4px 16px rgba(27, 77, 62, 0.15);
    
    /* Status Colors */
    --green: #10b981;
    --green-bg: #dcfce7;
    --green-text: #15803d;
    
    --yellow: #f59e0b;
    --yellow-bg: #fef3c7;
    --yellow-text: #b45309;
    
    --red: #ef4444;
    --red-bg: #fee2e2;
    --red-text: #b91c1c;
    
    --purple: #8b5cf6;
    --grey: #64748b;

    /* Fonts */
    --font-heading: 'Outfit', 'Plus Jakarta Sans', sans-serif;
    --font-body: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    
    /* Spacing & Layout Tokens */
    --radius-xl: 16px;
    --radius: 12px;
    --radius-sm: 8px;
    
    --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.05), 0 4px 12px rgba(0, 0, 0, 0.03);
    --shadow-pop: 0 10px 30px rgba(0, 0, 0, 0.08);
}

* { box-sizing: border-box; }

::selection { background: rgba(27, 77, 62, 0.15); color: #1b4d3e; }

::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--bg-body); }
::-webkit-scrollbar-thumb { background: #cbd5e1; border-radius: 99px; }
::-webkit-scrollbar-thumb:hover { background: #94a3b8; }

body {
    margin: 0;
    font-family: var(--font-body);
    background-color: var(--bg-body);
    color: var(--text-main);
    -webkit-font-smoothing: antialiased;
    min-height: 100vh;
}

h1, h2, h3, h4 { font-family: var(--font-heading); letter-spacing: -0.02em; font-weight: 700; color: var(--text-heading); }

a { color: var(--accent); text-decoration: none; transition: color .15s; }
a:hover { color: #143a2f; }

/* ---------- Login Screen ---------- */
.login-body {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    position: relative;
    background: #f1f5f9;
}
.login-box {
    position: relative;
    background: #ffffff;
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: 44px 40px 36px;
    width: 400px;
    box-shadow: var(--shadow-pop);
    z-index: 1;
}
.login-header {
    text-align: center;
    margin-bottom: 28px;
}
.login-header .brand-mark-lg {
    display: inline-flex; align-items: center; justify-content: center;
    width: 52px; height: 52px; border-radius: 14px; font-size: 24px;
    background: var(--bg-featured); color: #ffffff;
    box-shadow: var(--accent-glow);
    margin-bottom: 12px;
}
.login-header h1 {
    margin: 0; font-size: 24px; font-weight: 800; color: var(--text-heading);
}
.login-sub { color: var(--text-muted); font-size: 13px; margin-top: 4px; }

.login-box form { display: flex; flex-direction: column; gap: 16px; }
.login-box label { font-size: 11.5px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em; color: var(--text-muted); }
.login-box input {
    background: var(--bg-input); border: 1px solid var(--border); border-radius: var(--radius-sm);
    padding: 12px 14px; color: var(--text-heading); font-size: 14px; font-family: var(--font-body);
    transition: all .2s ease;
}
.login-box input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(27, 77, 62, 0.12); }
.login-box button {
    margin-top: 10px; padding: 13px; border: none; border-radius: var(--radius-sm);
    background: var(--bg-featured); color: #ffffff; font-weight: 700; cursor: pointer;
    font-family: var(--font-heading); font-size: 15px; letter-spacing: 0.02em;
    box-shadow: var(--accent-glow);
    transition: all .2s ease;
}
.login-box button:hover { background: var(--bg-featured-hover); transform: translateY(-1px); }
.login-box button:active { transform: translateY(0); }
.login-hint { text-align: center; margin-top: 20px; font-size: 12px; color: var(--text-dim); }

.alert { padding: 12px 16px; border-radius: var(--radius-sm); font-size: 13px; margin-bottom: 16px; border: 1px solid; }
.alert-danger { background: var(--red-bg); border-color: #fecaca; color: var(--red-text); }
.alert-success { background: var(--green-bg); border-color: #bbf7d0; color: var(--green-text); }

/* ---------- App Shell Layout ---------- */
.app-shell { display: flex; min-height: 100vh; }

.sidebar {
    width: 240px;
    background: #ffffff;
    border-right: 1px solid var(--border);
    display: flex; flex-direction: column;
    position: fixed; top: 0; bottom: 0; left: 0;
    z-index: 100;
}
.sidebar-brand {
    padding: 24px 20px 18px;
    border-bottom: 1px solid var(--border-soft);
}
.brand-top-header {
    display: flex; align-items: center; gap: 10px;
}
.brand-logo-box {
    width: 36px; height: 36px; border-radius: 10px; background: var(--bg-featured);
    display: flex; align-items: center; justify-content: center; color: #ffffff; font-size: 18px;
    box-shadow: var(--accent-glow);
}
.brand-name {
    font-family: var(--font-heading); font-size: 20px; font-weight: 800; color: var(--text-heading);
    letter-spacing: -0.02em;
}
.brand-tag { display: block; font-size: 10px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; color: var(--accent); margin-top: 1px; }

.sidebar nav { flex: 1; padding: 18px 12px; display: flex; flex-direction: column; gap: 18px; overflow-y: auto; }
.nav-group-title { font-size: 10.5px; font-weight: 800; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-dim); padding: 0 10px; margin-bottom: 6px; }
.nav-group-items { display: flex; flex-direction: column; gap: 4px; }

.nav-link {
    display: flex; align-items: center; gap: 12px; padding: 10px 14px; border-radius: var(--radius-sm);
    color: var(--text-muted); text-decoration: none; font-size: 13.5px; font-weight: 600;
    transition: all .18s ease;
}
.nav-link:hover { background: #f8fafc; color: var(--text-heading); }
.nav-link.active {
    background: var(--bg-featured);
    color: #ffffff; font-weight: 700;
    box-shadow: var(--accent-glow);
}
.nav-icon {
    width: 20px; height: 20px; flex: none; display: inline-flex;
    align-items: center; justify-content: center; color: currentColor;
}
.nav-link.active .nav-icon { color: #ffffff; }

.sidebar-footer {
    padding: 16px 20px; border-top: 1px solid var(--border); font-size: 12px;
    display: flex; align-items: center; justify-content: space-between; background: #fafafa;
}
.user-avatar-sm {
    width: 32px; height: 32px; border-radius: 50%; background: var(--bg-featured);
    display: flex; align-items: center; justify-content: center; font-weight: 700; color: #fff; font-size: 12px;
}
.logout-link {
    color: var(--red-text); font-size: 12px; font-weight: 600; padding: 6px 12px; border-radius: var(--radius-sm);
    background: var(--red-bg); border: 1px solid #fecaca; transition: all .15s;
}
.logout-link:hover { background: #fca5a5; color: #7f1d1d; }

/* ---------- Main Content Area ---------- */
.main-content {
    margin-left: 240px; flex: 1; padding: 24px 32px 48px;
    max-width: calc(100vw - 240px); position: relative;
}

/* ---------- Cards & Modular Layout ---------- */
.grid { display: grid; gap: 18px; }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

@media (max-width: 1280px) { .grid-4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 900px) { .grid-3 { grid-template-columns: 1fr; } }
@media (max-width: 768px) {
    .grid-4, .grid-2 { grid-template-columns: 1fr; }
    .main-content { margin-left: 0; max-width: 100vw; padding: 20px 16px 40px; }
    .sidebar { position: static; width: 100%; height: auto; }
    .app-shell { flex-direction: column; }
}

.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: 20px 24px;
    box-shadow: var(--shadow-card);
    position: relative; overflow: hidden;
    transition: all .2s ease;
}
.card:hover {
    border-color: #cbd5e1;
    box-shadow: var(--shadow-pop);
}

/* Featured Card (Card 1) */
.card-featured {
    background: var(--bg-featured);
    color: #ffffff;
    border: none;
    box-shadow: var(--accent-glow);
}
.card-featured .card-title-sub { color: rgba(255, 255, 255, 0.85); }
.card-featured .card-num-val { color: #ffffff; }

/* Metric Titles & Values */
.card-title-sub {
    font-size: 11.5px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em; color: var(--text-muted);
}
.card-num-val {
    font-family: var(--font-heading); font-size: 28px; font-weight: 800; line-height: 1.15; color: var(--text-heading); margin-top: 6px;
}
.kpi-header-flex { display: flex; align-items: flex-start; justify-content: space-between; margin-bottom: 10px; }

.kpi-icon-square {
    width: 42px; height: 42px; border-radius: 12px; display: flex; align-items: center; justify-content: center;
    font-size: 18px; color: #ffffff; flex: none;
}
.kpi-icon-square.icon-emerald { background: var(--bg-featured); }
.kpi-icon-square.icon-cyan { background: #0284c7; }
.kpi-icon-square.icon-green { background: #10b981; }
.kpi-icon-square.icon-red { background: #ef4444; }
.kpi-icon-square.icon-amber { background: #f59e0b; }

/* Dedicated Sub-Card Boxes Inside KPI Cards */
.sub-card-box {
    margin-top: 16px;
    padding: 10px 14px;
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    border-radius: var(--radius-sm);
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
}
.sub-card-box-featured {
    width: 100%;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-sm);
    background: rgba(255, 255, 255, 0.15);
    color: #ffffff;
    padding: 10px 14px;
    font-size: 12px;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: background .18s ease;
}
.sub-card-box-featured:hover {
    background: rgba(255, 255, 255, 0.25);
}

/* Status Badges */
.badge {
    display: inline-flex; align-items: center; gap: 5px; padding: 4px 10px; border-radius: 99px;
    font-size: 11px; font-weight: 700; letter-spacing: 0.02em; border: 1px solid transparent;
}
.badge-green { background: var(--green-bg); color: var(--green-text); border-color: #bbf7d0; }
.badge-yellow { background: var(--yellow-bg); color: var(--yellow-text); border-color: #fde68a; }
.badge-red { background: var(--red-bg); color: var(--red-text); border-color: #fecaca; }
.badge-blue { background: #e0f2fe; color: #0369a1; border-color: #bae6fd; }
.badge-grey { background: #f1f5f9; color: #475569; border-color: #e2e8f0; }

/* ---------- Substation Grid Cards ---------- */
.ss-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 14px; }
.ss-cell {
    border-radius: var(--radius); padding: 16px 14px; text-align: center; border: 1px solid var(--border);
    cursor: pointer; transition: all .2s ease;
    text-decoration: none; color: var(--text-heading); display: block;
    background: #ffffff; box-shadow: var(--shadow-card);
}
.ss-cell:hover { transform: translateY(-3px); box-shadow: var(--shadow-pop); border-color: #cbd5e1; }
.ss-cell.status-green { border-color: #bbf7d0; background: linear-gradient(180deg, #f0fdf4, #ffffff); }
.ss-cell.status-yellow { border-color: #fde68a; background: linear-gradient(180deg, #fffbeb, #ffffff); }
.ss-cell.status-red { border-color: #fecaca; background: linear-gradient(180deg, #fef2f2, #ffffff); }
.ss-cell .ss-name { font-family: var(--font-heading); font-weight: 700; font-size: 14.5px; margin-bottom: 6px; color: var(--text-heading); }
.ss-cell .ss-temp { font-family: var(--font-heading); font-size: 26px; font-weight: 800; color: var(--text-heading); }
.ss-cell .ss-meta { font-size: 11px; color: var(--text-muted); margin-top: 6px; }

/* ---------- Data Tables ---------- */
.table-wrap {
    overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius);
    background: #ffffff; box-shadow: var(--shadow-card);
}
table.data-table { width: 100%; border-collapse: collapse; font-size: 13.5px; text-align: left; }
table.data-table th, table.data-table td { padding: 12px 16px; border-bottom: 1px solid var(--border-soft); }
table.data-table th {
    color: var(--text-muted); font-weight: 700; text-transform: uppercase; font-size: 11px; letter-spacing: 0.06em;
    position: sticky; top: 0; background: #f8fafc;
    z-index: 2;
}
table.data-table td { color: var(--text-heading); }
table.data-table tbody tr { transition: background .15s; }
table.data-table tbody tr:hover { background: #f8fafc; }
table.data-table tbody tr:last-child td { border-bottom: none; }
.table-wrap.tight table.data-table td, .table-wrap.tight table.data-table th { padding: 9px 13px; font-size: 12.5px; }

.row-red td { background: #fef2f2 !important; }
.row-yellow td { background: #fffbeb !important; }
.row-green td { background: #f0fdf4 !important; }

/* ---------- Forms & Controls ---------- */
.form-panel {
    background: #ffffff; border: 1px solid var(--border); border-radius: var(--radius-xl); padding: 26px 28px; box-shadow: var(--shadow-card);
}
.form-row { display: grid; grid-template-columns: 180px 1fr; gap: 14px; align-items: center; margin-bottom: 16px; }
.form-row label { color: var(--text-muted); font-size: 13px; font-weight: 600; }
.form-row input, .form-row select, .form-row textarea {
    background: var(--bg-input); border: 1px solid var(--border); border-radius: var(--radius-sm);
    padding: 10px 14px; color: var(--text-heading); font-size: 13.5px; font-family: var(--font-body); width: 100%;
    transition: all .18s ease;
}
.form-row input:focus, .form-row select:focus, .form-row textarea:focus {
    outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(27, 77, 62, 0.12);
}
.form-row input:disabled { opacity: .5; cursor: not-allowed; }
.form-actions { display: flex; gap: 12px; margin-top: 22px; }

.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 9px 18px; border-radius: var(--radius-sm);
    border: 1px solid var(--border); background: #ffffff; color: var(--text-heading); cursor: pointer; text-decoration: none;
    font-size: 13px; font-weight: 600; font-family: var(--font-body); transition: all .18s ease;
}
.btn:hover { border-color: #cbd5e1; background: #f8fafc; transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn-primary {
    background: var(--bg-featured); color: #ffffff; border-color: transparent; font-weight: 700;
    box-shadow: var(--accent-glow);
}
.btn-primary:hover { background: var(--bg-featured-hover); color: #ffffff; border-color: transparent; }
.btn-danger { background: var(--red-bg); border-color: #fecaca; color: var(--red-text); }
.btn-danger:hover { background: #fca5a5; color: #7f1d1d; }

.filters { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 22px; align-items: flex-end; }
.filters .f-item { display: flex; flex-direction: column; gap: 6px; }
.filters label { font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em; color: var(--text-dim); }
.filters input, .filters select {
    background: #ffffff; border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 9px 13px;
    color: var(--text-heading); font-size: 13px; transition: all .18s ease;
}
.filters input:focus, .filters select:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(27, 77, 62, 0.12); }

.section-title {
    font-family: var(--font-heading); font-size: 17px; font-weight: 700; margin: 28px 0 16px; color: var(--text-heading);
    display: flex; align-items: center; gap: 10px;
}
.section-title::before {
    content: ''; width: 4px; height: 18px; border-radius: 4px; background: var(--accent);
}
.section-title:first-child { margin-top: 0; }

.accordion { border: 1px solid var(--border); border-radius: var(--radius); margin-bottom: 14px; overflow: hidden; background: #ffffff; box-shadow: var(--shadow-card); }
.accordion summary {
    background: #f8fafc; padding: 14px 20px; cursor: pointer; font-weight: 600; list-style: none;
    font-size: 14px; transition: background .15s; user-select: none; color: var(--text-heading);
}
.accordion summary:hover { background: #f1f5f9; }
.accordion summary::-webkit-details-marker { display: none; }
.accordion summary:before { content: '▸ '; color: var(--accent); display: inline-block; transition: transform .15s; margin-right: 6px; }
.accordion[open] summary:before { transform: rotate(90deg); }
.accordion .accordion-body { padding: 20px; }

.summary-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin: 20px 0; }
.summary-cards .card { background: linear-gradient(135deg, #f0fdf4, #ffffff); border-color: #bbf7d0; text-align: center; }

.chevron { color: var(--text-dim); float: right; font-size: 18px; transition: transform .15s, color .15s; }
.motor-row {
    display: flex; align-items: center; justify-content: space-between; padding: 14px 18px; border-bottom: 1px solid var(--border-soft);
    text-decoration: none; color: var(--text-heading); transition: background .15s;
}
.motor-row:last-child { border-bottom: none; }
.motor-row:hover { background: #f8fafc; }
.motor-row:hover .chevron { transform: translateX(4px); color: var(--accent); }
.motor-row .m-number { font-family: var(--font-heading); font-weight: 700; font-size: 15px; color: var(--text-heading); }
.motor-row .m-meta { font-size: 12.5px; color: var(--text-muted); margin-top: 3px; }

.search-bar { display: flex; gap: 12px; margin-bottom: 18px; }
.search-bar input {
    flex: 1; background: #ffffff; border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 11px 16px;
    color: var(--text-heading); font-size: 14px; transition: all .18s ease;
}
.search-bar input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(27, 77, 62, 0.12); }

.empty-state { text-align: center; color: var(--text-muted); padding: 48px 20px; font-size: 13.5px; }