@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
    --primary-color: #206bc4;
    --primary-hover: #1a569d;
    --sidebar-bg: #1e293b;
    --sidebar-text: #f8fafc;
    --bg-light: #f4f6fa;
    --text-main: #1d273b;
    --card-bg: #ffffff;
    --border-color: #e6e8e9;
    
    /* Status Colors */
    --status-red: #fceceb;
    --text-red: #d63939;
    --status-orange: #fef7ed;
    --text-orange: #f76707;
    --status-green: #eaf6ec;
    --text-green: #2fb344;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-light);
    color: var(--text-main);
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

/* Base Layout (AdminLTE / Tabler style) */
.wrapper {
    display: flex;
    width: 100%;
    align-items: stretch;
}

/* Sidebar */
.sidebar {
    min-width: 250px;
    max-width: 250px;
    background: var(--sidebar-bg);
    color: var(--sidebar-text);
    min-height: 100vh;
    transition: all 0.3s;
    box-shadow: 2px 0 10px rgba(0,0,0,0.1);
    z-index: 1030;
}

.sidebar .brand-logo {
    padding: 1.5rem 1rem;
    font-size: 1.25rem;
    font-weight: 700;
    text-align: center;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    letter-spacing: 1px;
}

.sidebar-menu {
    padding: 1rem 0;
    list-style: none;
    margin: 0;
}

.sidebar-menu li a {
    display: block;
    padding: 0.85rem 1.5rem;
    color: #cbd5e1;
    text-decoration: none;
    font-weight: 500;
    transition: 0.2s;
}

.sidebar-menu li a:hover, .sidebar-menu li.active a {
    background: rgba(255,255,255,0.05);
    color: #ffffff;
    border-left: 3px solid var(--primary-color);
}

.sidebar-menu li a i {
    margin-right: 10px;
    font-size: 1.1rem;
}

/* Main Content */
.main-content {
    width: 100%;
    min-height: 100vh;
    transition: all 0.3s;
}

/* Top Navbar */
.top-navbar {
    background: #fff;
    padding: 0.75rem 1.5rem;
    box-shadow: 0 1px 3px rgba(0,0,0,0.04);
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
}

/* Financial Cards */
.stat-card {
    background: var(--card-bg);
    border-radius: 8px;
    padding: 1.5rem;
    box-shadow: 0 1px 4px rgba(0,0,0,0.04);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: "";
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: var(--primary-color);
}

.stat-card.success-card::before { background: var(--text-green); }
.stat-card.warning-card::before { background: var(--text-orange); }
.stat-card.danger-card::before { background: var(--text-red); }

/* DataTable Customizations */
.sheet-container {
    background: var(--card-bg);
    border-radius: 8px;
    padding: 1.5rem;
    box-shadow: 0 1px 4px rgba(0,0,0,0.04);
    border: 1px solid var(--border-color);
}

table.dataTable { border-collapse: collapse !important; font-size: 0.85rem; }
table.dataTable thead th {
    background-color: #f8fafc;
    color: #64748b;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.7rem;
    border-bottom: 2px solid var(--border-color) !important;
}

table.dataTable tbody tr { transition: background-color 0.2s ease; border-bottom: 1px solid var(--border-color); }
table.dataTable tbody tr:hover { background-color: #f8fafc; }

/* Dynamic Row Coloring via Datatables */
.row-expiring { background-color: var(--status-orange) !important; color: var(--text-orange); }
.row-expired { background-color: var(--status-red) !important; color: var(--text-red); }
.row-paid { background-color: var(--status-green) !important; color: var(--text-green); transition: background-color 0.3s ease; }

/* Pulsing Notification Badge */
.pulse-dot {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    margin-right: 5px;
    animation: pulse 1.5s infinite;
}
.pulse-red { background: var(--text-red); box-shadow: 0 0 0 0 rgba(214, 57, 57, 0.7); }
.pulse-orange { background: var(--text-orange); box-shadow: 0 0 0 0 rgba(247, 103, 7, 0.7); }

@keyframes pulse {
    0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(0, 0, 0, 0.7); }
    70% { transform: scale(1); box-shadow: 0 0 0 10px rgba(0, 0, 0, 0); }
    100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(0, 0, 0, 0); }
}

/* Badges */
.badge-custom { padding: 0.35em 0.65em; font-size: 0.75em; font-weight: 600; border-radius: 4px; }
.payment-paid { background-color: var(--status-green); color: var(--text-green); }
.payment-pending { background-color: var(--status-red); color: var(--text-red); }
.payment-partial { background-color: var(--status-orange); color: var(--text-orange); }

.editable-field {
    cursor: pointer; border-bottom: 1px dashed var(--primary-color);
    padding-bottom: 1px; transition: all 0.2s;
}

/* Auth Card */
.auth-card {
    max-width: 400px; width: 100%; border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05); border: none;
}