/* Import Modern Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600;700&display=swap');

/* CSS Variables for Light / Dark Design System */
:root {
    /* Color Palette - Light Mode */
    --font-sans: 'Outfit', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;

    --bg-primary: #f5f7fb;
    --bg-surface: rgba(255, 255, 255, 0.65);
    --border-color: rgba(226, 232, 240, 0.7);
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;

    --accent-blue: #3b82f6;
    --accent-blue-hover: #2563eb;
    --accent-blue-glow: rgba(59, 130, 246, 0.15);

    --success-color: #10b981;
    --success-bg: rgba(16, 185, 129, 0.1);
    --success-text: #065f46;

    --warning-color: #f59e0b;
    --warning-bg: rgba(245, 158, 11, 0.1);
    --warning-text: #92400e;

    --danger-color: #ef4444;
    --danger-bg: rgba(239, 68, 68, 0.1);
    --danger-text: #991b1b;

    --whatsapp-color: #25d366;
    --whatsapp-bg: rgba(37, 211, 102, 0.1);
    --whatsapp-text: #0b6623;

    --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.05), 0 4px 6px -4px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.08);

    --glass-blur: 16px;
    --border-radius-lg: 20px;
    --border-radius-md: 12px;
    --border-radius-sm: 8px;

    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark Mode Overrides */
body.dark-theme {
    --bg-primary: #0b0f19;
    --bg-surface: rgba(17, 24, 39, 0.65);
    --border-color: rgba(31, 41, 55, 0.6);
    --text-primary: #f3f4f6;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;

    --accent-blue: #3b82f6;
    --accent-blue-hover: #60a5fa;
    --accent-blue-glow: rgba(96, 165, 250, 0.25);

    --success-bg: rgba(16, 185, 129, 0.15);
    --success-text: #34d399;

    --warning-bg: rgba(245, 158, 11, 0.15);
    --warning-text: #fbbf24;

    --danger-bg: rgba(239, 68, 68, 0.15);
    --danger-text: #f87171;

    --whatsapp-bg: rgba(37, 211, 102, 0.15);
    --whatsapp-text: #4ade80;

    --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -4px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.4), 0 8px 10px -6px rgba(0, 0, 0, 0.3);
}

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

body {
    font-family: var(--font-sans);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.mono {
    font-family: var(--font-mono);
}

/* Scrollbars */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--text-muted);
    border-radius: var(--border-radius-sm);
    border: 2px solid var(--bg-primary);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

/* App Containers */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1.5rem;
    width: 100%;
}

/* Header styling */
header {
    background: var(--bg-surface);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 40;
    transition: var(--transition-smooth);
}

header .header-inner {
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
}

.brand-logo {
    background: linear-gradient(135deg, var(--accent-blue), #8b5cf6);
    color: #fff;
    width: 40px;
    height: 40px;
    border-radius: var(--border-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    box-shadow: 0 4px 10px rgba(59, 130, 246, 0.3);
}

.brand-name {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.025em;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* User profile tag */
.user-profile {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    padding: 0.35rem 0.85rem;
    border-radius: 50px;
    font-size: 0.875rem;
}

.user-role-badge {
    background: var(--success-bg);
    color: var(--success-text);
    padding: 0.1rem 0.4rem;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.user-role-badge.viewer {
    background: var(--warning-bg);
    color: var(--warning-text);
}

/* Main Layout */
main {
    flex: 1;
    padding: 2rem 0;
}

/* Dashboard Nav Tabs */
.nav-tabs {
    display: flex;
    gap: 0.5rem;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 2rem;
    overflow-x: auto;
    scrollbar-width: none; /* Firefox */
}

.nav-tabs::-webkit-scrollbar {
    display: none; /* Safari and Chrome */
}

.tab-btn {
    background: none;
    border: none;
    outline: none;
    color: var(--text-secondary);
    padding: 1rem 1.25rem;
    font-family: var(--font-sans);
    font-size: 0.95rem;
    font-weight: 550;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    border-bottom: 3px solid transparent;
    transition: var(--transition-smooth);
    white-space: nowrap;
}

.tab-btn:hover {
    color: var(--text-primary);
}

.tab-btn.active {
    color: var(--accent-blue);
    border-bottom-color: var(--accent-blue);
}

/* Glassmorphism Cards */
.card {
    background: var(--bg-surface);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-smooth);
}

.card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

/* Grid Layouts */
.grid-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-item {
    display: flex;
    flex-direction: column;
}

.stat-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.75rem;
}

.stat-title {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.stat-icon {
    width: 36px;
    height: 36px;
    border-radius: var(--border-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-primary);
    color: var(--accent-blue);
    font-size: 1.1rem;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    color: var(--text-primary);
}

.stat-footer {
    margin-top: auto;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-muted);
    padding-top: 0.5rem;
}

.grid-dashboard-details {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 1.5rem;
    align-items: start;
}

@media (max-width: 992px) {
    .grid-dashboard-details {
        grid-template-columns: 1fr;
    }
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-family: var(--font-sans);
    font-size: 0.875rem;
    font-weight: 600;
    padding: 0.6rem 1.2rem;
    border-radius: var(--border-radius-md);
    border: 1px solid transparent;
    cursor: pointer;
    transition: var(--transition-smooth);
    outline: none;
}

.btn-primary {
    background: var(--accent-blue);
    color: #fff;
    box-shadow: 0 4px 12px var(--accent-blue-glow);
}

.btn-primary:hover:not(:disabled) {
    background: var(--accent-blue-hover);
    transform: translateY(-1px);
    box-shadow: 0 6px 16px var(--accent-blue-glow);
}

.btn-secondary {
    background: var(--bg-primary);
    border-color: var(--border-color);
    color: var(--text-primary);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--border-color);
}

.btn-success {
    background: var(--success-bg);
    color: var(--success-text);
}

.btn-success:hover:not(:disabled) {
    background: rgba(16, 185, 129, 0.25);
}

.btn-danger {
    background: var(--danger-bg);
    color: var(--danger-text);
}

.btn-danger:hover:not(:disabled) {
    background: rgba(239, 68, 68, 0.25);
}

.btn-whatsapp {
    background: var(--whatsapp-color);
    color: #fff;
    box-shadow: 0 4px 12px rgba(37, 211, 102, 0.2);
}

.btn-whatsapp:hover:not(:disabled) {
    background: #20ba5a;
    transform: translateY(-1px);
}

.btn-icon {
    width: 32px;
    height: 32px;
    padding: 0;
    border-radius: var(--border-radius-sm);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Modals */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(15, 23, 42, 0.4);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 50;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: all;
}

.modal {
    background: var(--bg-surface);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    width: 100%;
    max-width: 480px;
    box-shadow: var(--shadow-lg);
    transform: scale(0.9);
    transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    overflow: hidden;
}

.modal-overlay.active .modal {
    transform: scale(1);
}

.modal-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-title {
    font-size: 1.15rem;
    font-weight: 700;
}

.close-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1.1rem;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-smooth);
}

.close-btn:hover {
    background: var(--bg-primary);
    color: var(--text-primary);
}

.modal-body {
    padding: 1.5rem;
}

/* Forms styling */
.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.02em;
}

.form-control {
    width: 100%;
    font-family: var(--font-sans);
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    padding: 0.75rem 1rem;
    font-size: 0.95rem;
    color: var(--text-primary);
    outline: none;
    transition: var(--transition-smooth);
}

.form-control:focus {
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px var(--accent-blue-glow);
}

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

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
    margin-top: 1.5rem;
}

/* Tables styling */
.table-wrapper {
    overflow-x: auto;
    border-radius: var(--border-radius-md);
}

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

thead {
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
}

th {
    padding: 0.85rem 1.25rem;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
}

td {
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
    font-size: 0.9rem;
}

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

tr:hover td {
    background: var(--bg-primary);
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
}

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

.badge-warning {
    background: var(--warning-bg);
    color: var(--warning-text);
}

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

/* Auth Portal Segmented Tabs */
.portal-tabs {
    display: flex;
    background: var(--bg-primary);
    padding: 0.25rem;
    border-radius: var(--border-radius-md);
    margin-bottom: 1.5rem;
    border: 1px solid var(--border-color);
}

.portal-tab-btn {
    flex: 1;
    border: none;
    background: none;
    font-family: var(--font-sans);
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--text-secondary);
    padding: 0.5rem;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition-smooth);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
}

.portal-tab-btn.active {
    background: var(--bg-surface);
    color: var(--accent-blue);
    box-shadow: var(--shadow-sm);
}

/* Auth Screens (Login / Signup) */
.auth-container {
    max-width: 440px;
    width: 100%;
    margin: 4rem auto;
}

.auth-header {
    text-align: center;
    margin-bottom: 1.5rem;
}

.auth-logo {
    display: inline-flex;
    margin-bottom: 0.75rem;
}

.auth-title {
    font-size: 1.75rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
    letter-spacing: -0.03em;
}

.auth-subtitle {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.auth-switch {
    text-align: center;
    margin-top: 1.25rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.auth-switch a {
    color: var(--accent-blue);
    text-decoration: none;
    font-weight: 600;
}

.auth-switch a:hover {
    text-decoration: underline;
}

/* Members Grid */
.members-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

.member-card {
    border-left: 4px solid var(--accent-blue);
}

.member-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0.75rem;
}

.member-name {
    font-weight: 700;
    font-size: 1.1rem;
}

.member-desc {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.member-balance {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 1.25rem;
    color: var(--text-primary);
}

.member-actions {
    display: flex;
    gap: 0.75rem;
}

.member-actions .btn {
    flex: 1;
}

/* Utility layout custom */
.grid-utilities {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

/* Rental setup column styling */
.rental-layout {
    display: grid;
    grid-template-columns: 320px 1fr;
    gap: 1.5rem;
    align-items: start;
}

.rental-two-column-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    align-items: start;
}

@media (max-width: 768px) {
    .rental-two-column-layout {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .rental-layout {
        grid-template-columns: 1fr;
    }
}

/* Theme switch button */
.theme-toggle-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.15rem;
    cursor: pointer;
    width: 36px;
    height: 36px;
    border-radius: var(--border-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-smooth);
}

.theme-toggle-btn:hover {
    background: var(--bg-primary);
    color: var(--text-primary);
}

/* Pending Screen styling */
.pending-screen {
    max-width: 480px;
    width: 100%;
    margin: 6rem auto;
    text-align: center;
}

.pending-lock-icon {
    font-size: 3.5rem;
    color: var(--warning-color);
    background: var(--warning-bg);
    width: 80px;
    height: 80px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem auto;
    box-shadow: 0 0 20px rgba(245, 158, 11, 0.2);
    animation: pulseLock 2s infinite alternate;
}

@keyframes pulseLock {
    0% { transform: scale(1); box-shadow: 0 0 10px rgba(245, 158, 11, 0.15); }
    100% { transform: scale(1.05); box-shadow: 0 0 25px rgba(245, 158, 11, 0.35); }
}

/* User management queue lists */
.user-queue-card {
    margin-bottom: 1.5rem;
}

/* Utilities helper classes */
.hidden {
    display: none !important;
}

.flex-center {
    display: flex;
    align-items: center;
    justify-content: center;
}

.flex-between {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-4 { margin-bottom: 1rem; }
.mb-6 { margin-bottom: 1.5rem; }
.mt-4 { margin-top: 1rem; }

.section-title {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

/* Animations */
.animate-fade-in {
    animation: fadeIn 0.3s ease-in-out forwards;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Recent Activity Items */
.activity-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    max-height: 340px;
    overflow-y: auto;
    padding-right: 0.5rem;
}

.activity-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.85rem 1rem;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    transition: var(--transition-smooth);
}

.activity-item:hover {
    transform: translateX(4px);
}

.activity-indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
}

.activity-indicator.income {
    background-color: var(--success-color);
}

.activity-indicator.expense {
    background-color: var(--danger-color);
}

.activity-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.activity-title {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
}

.activity-date {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.activity-amount {
    font-size: 0.9rem;
    font-weight: 700;
}

.activity-amount.income {
    color: var(--success-color);
}

.activity-amount.expense {
    color: var(--danger-color);
}

/* Chart Canvas wrapper */
.chart-container {
    position: relative;
    height: 300px;
    width: 100%;
}

/* Responsive adjustments for Transaction Allocation Form */
@media (max-width: 768px) {
    #allocation-form {
        grid-template-columns: 1fr !important;
    }
}