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

:root {
    --bg-main: #f8fafc;
    --bg-card: #ffffff;
    --bg-sidebar: #0f172a;
    --sidebar-text: #94a3b8;
    --sidebar-hover: #1e293b;
    --sidebar-active: #2563eb;
    --text-primary: #1e293b;
    --text-muted: #64748b;
    --border-color: #e2e8f0;
    --topbar-bg: #ffffff;
    --brand-gold: #f59e0b;
    --accent-blue: #2563eb;
    --accent-cyan: #06b6d4;
    --accent-red: #ef4444;
    --accent-green: #10b981;
    --accent-purple: #6366f1;
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --card-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.05), 0 1px 2px -1px rgba(0, 0, 0, 0.05);
}

/* Deep Pure Dark Theme */
body.dark-theme {
    --bg-main: #000000;
    --bg-card: #0d0d0d;
    --bg-sidebar: #050505;
    --sidebar-text: #d4d4d8;
    --sidebar-hover: #18181b;
    --sidebar-active: #2563eb;
    --text-primary: #ffffff;
    --text-muted: #a1a1aa;
    --border-color: #27272a;
    --topbar-bg: #0a0a0a;
    --card-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.5);
}

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

body {
    font-family: var(--font-family);
    background-color: var(--bg-main);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    transition: background-color 0.2s ease, color 0.2s ease;
}

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

/* Sidebar */
.app-sidebar {
    width: 250px;
    background-color: var(--bg-sidebar);
    color: var(--sidebar-text);
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    border-right: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    height: 100vh;
    overflow-y: auto;
}

.sidebar-header {
    padding: 18px 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.brand-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1.25rem;
    font-weight: 700;
    text-decoration: none;
    color: #ffffff;
}

.brand-logo .brand-highlight {
    color: var(--brand-gold);
}

.sidebar-menu {
    list-style: none;
    padding: 16px 12px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    flex-grow: 1;
}

.sidebar-item a,
.sidebar-item button.sidebar-toggle {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 14px;
    color: var(--sidebar-text);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: 8px;
    transition: all 0.15s ease;
    border: none;
    background: transparent;
    width: 100%;
    cursor: pointer;
    text-align: left;
}

.sidebar-item a:hover,
.sidebar-item button.sidebar-toggle:hover {
    background-color: var(--sidebar-hover);
    color: #ffffff;
}

.sidebar-item.active > a,
.sidebar-item.active > button.sidebar-toggle {
    background-color: var(--sidebar-active);
    color: #ffffff;
    font-weight: 600;
}

.sidebar-icon {
    width: 20px;
    font-size: 1rem;
    text-align: center;
}

.sidebar-submenu {
    list-style: none;
    padding: 4px 0 6px 32px;
    display: flex;
    flex-direction: column;
    gap: 3px;
}

.sidebar-submenu.collapsed {
    display: none;
}

.sidebar-submenu li a {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 7px 12px;
    color: var(--sidebar-text);
    text-decoration: none;
    font-size: 0.85rem;
    border-radius: 6px;
    transition: all 0.15s ease;
}

.sidebar-submenu li a:hover {
    background-color: var(--sidebar-hover);
    color: #ffffff;
}

.sidebar-submenu li.active a {
    background-color: var(--sidebar-active);
    color: #ffffff;
    font-weight: 600;
}

.sidebar-item.logout {
    margin-top: auto;
    padding: 16px 12px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.sidebar-item.logout a {
    color: var(--accent-red);
}

.sidebar-item.logout a:hover {
    background-color: rgba(239, 68, 68, 0.15);
    color: #f87171;
}

/* Main Content Area */
.app-main {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
}

/* Topbar */
.app-topbar {
    height: 60px;
    background-color: var(--topbar-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 0 28px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 20;
}

.topbar-left {
    display: flex;
    align-items: center;
    gap: 16px;
}

.welcome-text {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-primary);
}

.topbar-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.theme-toggle-btn {
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 6px 12px;
    border-radius: 20px;
    cursor: pointer;
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    gap: 6px;
    font-weight: 500;
    transition: background 0.2s ease;
}

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

.badge-role {
    background-color: #0ea5e9;
    color: #ffffff;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 4px 12px;
    border-radius: 20px;
    letter-spacing: 0.3px;
}

/* Page Body */
.app-content {
    padding: 24px 28px;
    flex-grow: 1;
}

.page-title-row {
    margin-bottom: 24px;
}

.page-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.page-subtitle {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: 4px;
}

/* KPI Stat Cards Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 18px;
    margin-bottom: 24px;
}

.stat-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 16px;
    box-shadow: var(--card-shadow);
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    flex-shrink: 0;
}

.stat-icon.blue { background-color: rgba(37, 99, 235, 0.12); color: #2563eb; }
.stat-icon.green { background-color: rgba(16, 185, 129, 0.12); color: #10b981; }
.stat-icon.cyan { background-color: rgba(6, 182, 212, 0.12); color: #06b6d4; }
.stat-icon.yellow { background-color: rgba(245, 158, 11, 0.12); color: #f59e0b; }

.stat-info .stat-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 500;
    margin-bottom: 4px;
}

.stat-info .stat-value {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--text-primary);
}

/* Charts & Payments Row */
.dashboard-row-two {
    display: grid;
    grid-template-columns: 3fr 2fr;
    gap: 18px;
    margin-bottom: 24px;
}

.card-widget {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    box-shadow: var(--card-shadow);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.card-widget-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-widget-header h3 {
    font-size: 0.95rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--accent-blue);
}

.card-widget-body {
    padding: 16px 20px;
    flex-grow: 1;
}

/* Tables */
.table-responsive {
    width: 100%;
    overflow-x: auto;
}

.custom-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

.custom-table th,
.custom-table td {
    padding: 10px 14px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.custom-table th {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
    font-weight: 600;
}

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

.text-right {
    text-align: right !important;
}

.badge-due {
    background-color: rgba(239, 68, 68, 0.15);
    color: #ef4444;
    padding: 4px 10px;
    border-radius: 12px;
    font-weight: 600;
    font-size: 0.8rem;
}

/* Bottom Split Tables (Top Spenders & Unpaid Clients) */
.dashboard-row-three {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 18px;
    margin-bottom: 24px;
}

.card-colored-header {
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    background-color: var(--bg-card);
    box-shadow: var(--card-shadow);
}

.header-blue {
    background-color: #2563eb;
    color: #ffffff;
    padding: 12px 20px;
    font-size: 0.95rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
}

.header-red {
    background-color: #dc2626;
    color: #ffffff;
    padding: 12px 20px;
    font-size: 0.95rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Quick Action Buttons Grid */
.quick-actions-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 18px;
    margin-bottom: 24px;
}

.btn-action {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 14px 20px;
    border-radius: 10px;
    color: #ffffff;
    font-weight: 600;
    font-size: 0.95rem;
    text-decoration: none;
    border: none;
    cursor: pointer;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    transition: transform 0.15s ease, opacity 0.15s ease;
}

.btn-action:hover {
    transform: translateY(-2px);
    opacity: 0.95;
}

.btn-blue { background-color: #2563eb; }
.btn-cyan { background-color: #06b6d4; }
.btn-red { background-color: #dc2626; }
.btn-green { background-color: #10b981; }
.btn-purple { background-color: #6366f1; }

/* Settings Layout (Vertical Tabs) */
.settings-container {
    display: grid;
    grid-template-columns: 260px 1fr;
    gap: 24px;
}

.settings-nav {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 12px;
    display: flex;
    flex-direction: column;
    gap: 6px;
    height: fit-content;
    box-shadow: var(--card-shadow);
}

.settings-tab-btn {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border: none;
    background: transparent;
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 0.9rem;
    font-weight: 500;
    text-align: left;
    cursor: pointer;
    transition: all 0.15s ease;
}

.settings-tab-btn:hover {
    background-color: var(--bg-main);
}

.settings-tab-btn.active {
    background-color: #2563eb;
    color: #ffffff;
    font-weight: 600;
}

.settings-content-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 28px;
    box-shadow: var(--card-shadow);
}

.settings-section-title {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 24px;
    color: var(--text-primary);
}

/* Forms */
.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.form-control {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background-color: var(--bg-card);
    color: var(--text-primary);
    font-size: 0.9rem;
    font-family: inherit;
    transition: border-color 0.15s ease;
}

.form-control:focus {
    outline: none;
    border-color: #2563eb;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.input-with-icon {
    position: relative;
}

.input-with-icon .form-control {
    padding-right: 36px;
}

.input-with-icon .input-icon {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--accent-green);
    font-size: 0.9rem;
}

.file-preview-row {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 12px;
}

.logo-preview-box {
    padding: 6px 14px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background-color: var(--bg-main);
    display: inline-flex;
    align-items: center;
    font-weight: 700;
}

.form-hint {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 6px;
}

/* Footer */
.app-footer {
    padding: 20px;
    text-align: center;
    font-size: 0.825rem;
    color: var(--text-muted);
    border-top: 1px solid var(--border-color);
    background-color: var(--bg-card);
    margin-top: auto;
}

/* Responsive */
@media (max-width: 1024px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .dashboard-row-two,
    .dashboard-row-three,
    .quick-actions-grid {
        grid-template-columns: 1fr;
    }
    .settings-container {
        grid-template-columns: 1fr;
    }
}