@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Outfit:wght@500;600;700;800&display=swap');

:root {
    --bg-main: #F6F8FA;
    --bg-surface: #FFFFFF;
    --border-color: #E5E7EB;
    --border-highlight: #D0D5DD;
    
    --primary: #2563EB;
    --primary-hover: #1D4ED8;
    --primary-light: #EFF6FF;
    
    --success: #10B981;
    --success-bg: #ECFDF5;
    --success-border: #A7F3D0;
    
    --warning: #F59E0B;
    --warning-bg: #FFFBEB;
    --warning-border: #FDE68A;
    
    --danger: #EF4444;
    --danger-bg: #FEF2F2;
    --danger-border: #FECACA;
    
    --info: #3B82F6;
    --info-bg: #EFF6FF;
    
    --text-main: #172033;
    --text-muted: #667085;
    --text-dim: #98A2B3;
    
    --shadow-sm: 0 1px 3px rgba(16, 24, 40, 0.06), 0 1px 2px rgba(16, 24, 40, 0.04);
    --shadow-md: 0 4px 12px -2px rgba(16, 24, 40, 0.08), 0 2px 6px -1px rgba(16, 24, 40, 0.04);
    --shadow-lg: 0 12px 24px -4px rgba(16, 24, 40, 0.12), 0 4px 8px -2px rgba(16, 24, 40, 0.04);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
}

body {
    background-color: var(--bg-main);
    color: var(--text-main);
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

/* Typography */
h1, h2, h3, h4, .brand-logo {
    font-family: 'Outfit', 'Inter', sans-serif;
    color: var(--text-main);
}

#app {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* --- CLIENT TOP NAVIGATION --- */
.client-navbar {
    background: var(--bg-surface);
    border-bottom: 1px solid var(--border-color);
    padding: 14px 32px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.brand-container {
    display: flex;
    align-items: center;
    gap: 12px;
}

.brand-logo {
    font-size: 22px;
    font-weight: 800;
    color: var(--primary);
    letter-spacing: -0.5px;
    text-decoration: none;
}

.brand-subtitle {
    font-size: 12px;
    color: var(--text-muted);
    font-weight: 500;
    padding-left: 10px;
    border-left: 1px solid var(--border-color);
}

.nav-links {
    display: flex;
    gap: 6px;
}

.nav-item {
    background: transparent;
    color: var(--text-muted);
    border: none;
    padding: 8px 16px;
    border-radius: 6px;
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.15s ease;
}

.nav-item:hover {
    color: var(--text-main);
    background: #F1F5F9;
}

.nav-item.active {
    color: var(--primary);
    background: var(--primary-light);
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 14px;
}

.btn-icon {
    background: #F8FAFC;
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    width: 38px;
    height: 38px;
    border-radius: 8px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    position: relative;
    transition: all 0.15s ease;
}

.btn-icon:hover {
    background: #F1F5F9;
    color: var(--text-main);
}

.badge-dot {
    position: absolute;
    top: 6px; right: 6px;
    width: 8px; height: 8px;
    background-color: var(--danger);
    border-radius: 50%;
}

.btn-logout {
    background: #FEF2F2;
    color: #DC2626;
    border: 1px solid #FECACA;
    padding: 7px 14px;
    border-radius: 6px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s ease;
}

.btn-logout:hover {
    background: #FEE2E2;
}

/* --- ADMIN SIDEBAR LAYOUT --- */
.admin-layout {
    display: flex;
    min-height: 100vh;
}

.admin-sidebar {
    width: 250px;
    background: var(--bg-surface);
    border-right: 1px solid var(--border-color);
    padding: 24px 16px;
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0; bottom: 0; left: 0;
    z-index: 90;
}

.admin-sidebar .brand-container {
    padding: 0 10px 20px 10px;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 20px;
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: 4px;
    flex: 1;
}

.sidebar-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    border-radius: 6px;
    color: var(--text-muted);
    font-weight: 600;
    font-size: 13.5px;
    background: transparent;
    border: none;
    cursor: pointer;
    text-align: left;
    transition: all 0.15s ease;
}

.sidebar-item:hover {
    background: #F1F5F9;
    color: var(--text-main);
}

.sidebar-item.active {
    background: var(--primary-light);
    color: var(--primary);
}

.admin-content {
    margin-left: 250px;
    flex: 1;
    padding: 28px 36px;
    max-width: calc(100vw - 250px);
}

/* --- MAIN CONTAINERS & CARDS --- */
.dashboard-container {
    max-width: 1240px;
    width: 100%;
    margin: 0 auto;
    padding: 32px 24px;
    flex: 1;
}

/* Summary Grid Cards */
.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
    margin-bottom: 28px;
}

.summary-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    padding: 22px 24px;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    position: relative;
    transition: box-shadow 0.2s ease, border-color 0.2s ease;
}

.summary-card:hover {
    border-color: var(--border-highlight);
    box-shadow: var(--shadow-md);
}

.summary-card.prominent-due {
    border: 2px solid var(--primary);
    background: #F8FAFC;
}

.card-label {
    color: var(--text-muted);
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-amount {
    font-size: 28px;
    font-weight: 800;
    color: var(--text-main);
    font-family: 'Outfit', sans-serif;
    letter-spacing: -0.5px;
}

.card-subtext {
    color: var(--text-muted);
    font-size: 12px;
    margin-top: 6px;
}

.card-action {
    margin-top: 16px;
}

/* Content Container Card */
.content-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 24px;
    box-shadow: var(--shadow-sm);
    margin-bottom: 24px;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--border-color);
}

.card-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-main);
}

/* Buttons System */
.btn {
    padding: 9px 18px;
    border-radius: 6px;
    font-weight: 600;
    font-size: 13.5px;
    cursor: pointer;
    border: 1px solid transparent;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all 0.15s ease;
    text-decoration: none;
}

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

.btn-primary:hover {
    background-color: var(--primary-hover);
    border-color: var(--primary-hover);
}

.btn-secondary {
    background-color: #FFFFFF;
    color: var(--text-main);
    border-color: var(--border-color);
}

.btn-secondary:hover {
    background-color: #F8FAFC;
    border-color: var(--border-highlight);
}

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

.btn-success:hover {
    background-color: #059669;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 12.5px;
    border-radius: 5px;
}

/* Tables System */
.table-responsive {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}

th {
    background: #F8FAFC;
    color: var(--text-muted);
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-color);
}

td {
    padding: 14px 16px;
    border-bottom: 1px solid var(--border-color);
    font-size: 13.5px;
    color: var(--text-main);
}

tr:hover td {
    background: #F8FAFC;
}

/* Status Badges System (Icon + Label + Color) */
.status-badge {
    padding: 4px 10px;
    border-radius: 50px;
    font-size: 11.5px;
    font-weight: 700;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    text-transform: uppercase;
}

.status-Paid, .status-active, .status-Active, .status-SUCCESS {
    background: var(--success-bg);
    color: #065F46;
    border: 1px solid var(--success-border);
}

.status-Due, .status-DUE, .status-Unpaid, .status-Pending, .status-PENDING, .status-Trial {
    background: var(--warning-bg);
    color: #92400E;
    border: 1px solid var(--warning-border);
}

.status-Overdue, .status-EXPIRED, .status-FAILED, .status-Suspended {
    background: var(--danger-bg);
    color: #991B1B;
    border: 1px solid var(--danger-border);
}

.status-Cancelled, .status-Inactive, .status-Draft {
    background: #F3F4F6;
    color: #4B5563;
    border: 1px solid #E5E7EB;
}

/* Empty States */
.empty-state {
    text-align: center;
    padding: 42px 20px;
    color: var(--text-muted);
    background: #F8FAFC;
    border-radius: 8px;
    border: 1px dashed var(--border-color);
}

.empty-state-icon {
    font-size: 38px;
    margin-bottom: 10px;
    color: var(--text-dim);
}

.empty-state-title {
    font-size: 15px;
    font-weight: 700;
    color: var(--text-main);
}

.empty-state-desc {
    font-size: 13px;
    margin-top: 4px;
}

/* Forms & Inputs */
.form-group {
    margin-bottom: 18px;
}

.form-label {
    display: block;
    font-size: 12.5px;
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 6px;
}

.form-control {
    width: 100%;
    background: #FFFFFF;
    border: 1px solid var(--border-color);
    color: var(--text-main);
    padding: 10px 14px;
    border-radius: 6px;
    font-size: 13.5px;
    outline: none;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.form-control:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

/* Clean White Login Screen */
.login-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    background-color: var(--bg-main);
}

.login-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    padding: 40px 36px;
    border-radius: 14px;
    width: 100%;
    max-width: 420px;
    box-shadow: var(--shadow-md);
}

/* Modals */
.modal-backdrop {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(15, 23, 42, 0.45);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 20px;
}

.modal-content {
    background: #FFFFFF;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    width: 100%;
    max-width: 560px;
    padding: 28px;
    box-shadow: var(--shadow-lg);
    max-height: 90vh;
    overflow-y: auto;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-color);
}

.modal-close {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 20px;
    cursor: pointer;
}

.hidden { display: none !important; }

/* Responsive Breakpoints */
@media (max-width: 768px) {
    .client-navbar {
        flex-direction: column;
        gap: 14px;
        padding: 16px 20px;
    }

    .admin-sidebar {
        position: relative;
        width: 100%;
        min-height: auto;
    }

    .admin-content {
        margin-left: 0;
        max-width: 100%;
        padding: 20px;
    }

    .admin-layout {
        flex-direction: column;
    }
}