/* --- VARIABLES & RESET --- */
:root {
    --bg-color: #f4f7f6;
    --bg-secondary-color: #ffffff;
    --text-color: #1f2937;
    --text-muted-color: #6b7280;
    --border-color: #e5e7eb;
    --accent-color: #2E8B57;
    --accent-hover-color: #256d45;
    --danger-color: #ef4444;
    --success-color: #22c55e;
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --sidebar-width: 250px;
}
html.dark {
    --bg-color: #111827;
    --bg-secondary-color: #1f2937;
    --text-color: #d1d5db;
    --text-muted-color: #9ca3af;
    --border-color: #374151;
}
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    transition: background-color 0.3s, color 0.3s;
}
/* --- ICONS --- */
i.lucide {
    stroke-width: 2;
    width: 18px;
    height: 18px;
    vertical-align: middle;
}
.title-icon {
    margin-right: 0.5rem;
}
/* --- LOGIN PAGE --- */
.login-body {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: var(--bg-color);
}
.login-container {
    width: 100%;
    max-width: 400px;
    padding: 1rem;
}
.login-card {
    background-color: var(--bg-secondary-color);
    padding: 2.5rem 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
}
.login-header {
    text-align: center;
    margin-bottom: 2rem;
}
.login-header h1 {
    color: var(--accent-color);
    margin-bottom: 0.5rem;
}
.login-header p {
    color: var(--text-muted-color);
}
.login-form .form-group {
    margin-bottom: 1.25rem;
}
.login-hint {
    text-align: center;
    margin-top: 1rem;
    font-size: 0.85rem;
    color: var(--text-muted-color);
}
/* --- APP LAYOUT & RESPONSIVE SIDEBAR --- */
.app-layout {
    display: flex;
}
#overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 998;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0s 0.3s;
}
#overlay.is-visible {
    opacity: 1;
    visibility: visible;
    transition: opacity 0.3s ease;
}
.sidebar {
    width: var(--sidebar-width);
    background-color: var(--bg-secondary-color);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    padding: 1.5rem 1rem;
    position: fixed;
    height: 100%;
    z-index: 999;
    transform: translateX(calc(-1 * var(--sidebar-width)));
    transition: transform 0.3s ease;
}
.sidebar-header {
    text-align: center;
    margin-bottom: 2.5rem;
}
.sidebar-header a {
    text-decoration: none;
}
.sidebar-header h1 {
    font-size: 1.6rem;
    color: var(--accent-color);
    margin-bottom: 0.25rem;
}
.sidebar-header p {
    font-size: 0.8rem;
    color: var(--text-muted-color);
}
.sidebar-nav { 
    display: flex; 
    flex-direction: column; 
    gap: 0.5rem; 
    flex-grow: 1; 
    overflow-y: auto;
}
.sidebar-nav a {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    text-decoration: none;
    color: var(--text-color);
    border-radius: 8px;
    transition: background-color 0.2s, color 0.2s, transform 0.2s;
}
.sidebar-nav a:hover {
    background-color: var(--accent-color);
    color: white;
    transform: translateX(5px);
}
.sidebar-nav a.active {
    background-color: var(--accent-color);
    color: white;
    font-weight: 600;
}
.sidebar-nav a.active i {
    color: white;
}
.sidebar-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}
.logout-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    color: var(--text-color);
}
.main-content {
    flex-grow: 1;
    padding: 1.5rem;
    transition: margin-left 0.3s ease;
    width: 100%;
}
.main-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1rem;
}
.main-header h2 {
    font-size: 1.8rem;
    font-weight: 600;
}
.menu-toggle {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-color);
}
.menu-toggle i {
    width: 24px;
    height: 24px;
}
@media (min-width: 768px) {
    .sidebar {
        transform: translateX(0);
    }
    .main-content {
        margin-left: var(--sidebar-width);
    }
    .menu-toggle,
    #overlay {
        display: none;
    }
}
@media (max-width: 767.98px) {
    .sidebar.is-open {
        transform: translateX(0);
    }
}
/* --- COMPONENTS --- */
.card {
    background-color: var(--bg-secondary-color);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: var(--shadow);
    margin-bottom: 1.5rem;
}
.card h3 {
    display: flex;
    align-items: center;
    margin: -1.5rem -1.5rem 1.5rem -1.5rem;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    font-size: 1.25rem;
    font-weight: 600;
}
.grid-container {
    display: grid;
    gap: 1.5rem;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}
.grid-2-col {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}
.grid-3-col {
    grid-template-columns: 1fr;
    /* Mobile first */
}
@media (min-width: 992px) {
    .grid-3-col {
        grid-template-columns: repeat(3, 1fr);
    }
}
.grid-form {
    display: grid;
    gap: 1.5rem;
    grid-template-columns: 1fr;
}
@media (min-width: 992px) {
    .grid-form {
        grid-template-columns: 2fr 1fr;
    }
}
.card.full-width {
    grid-column: 1 / -1;
}
/* --- STATS GRID (REFINED) --- */
.stats-grid {
    display: grid;
    gap: 1.5rem;
    /* This single line creates the flexible, wrapping grid you liked.
       Each card will be at least 240px wide but can grow to fill the space.
       It automatically fits as many columns as possible before wrapping. */
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}
.stat-card {
    display: flex;
    align-items: center;
    gap: 1rem;
}
.stat-icon {
    background-color: var(--accent-color);
    color: white;
    padding: 0.75rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}
.stat-icon i {
    width: 24px;
    height: 24px;
}
.stat-card.profit .stat-icon {
    background-color: var(--accent-hover-color);
}
.stat-info h3 {
    font-size: 0.9rem;
    color: var(--text-muted-color);
    font-weight: 500;
    border: none;
    padding: 0;
    margin: 0 0 0.25rem 0;
}
.stat-info p {
    font-size: 1.5rem;
    font-weight: 600;
    margin: 0;
}
/* ---(Other component styles like buttons, forms, tables, etc.)--- */
.btn {
    display: inline-block;
    padding: 0.7rem 1.4rem;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    text-decoration: none;
    font-size: 0.9rem;
    transition: background-color 0.2s, transform 0.1s;
}
.btn:hover {
    transform: translateY(-2px);
}
.btn-primary {
    background-color: var(--accent-color);
    color: white;
}
.btn-primary:hover {
    background-color: var(--accent-hover-color);
}
.btn-block {
    width: 100%;
    text-align: center;
}
.btn-secondary {
    background-color: #6c757d;
    color: white;
}
.btn-sm {
    padding: 0.25rem 0.5rem;
    font-size: 0.8rem;
}
.btn-success {
    background-color: var(--success-color);
    color: white;
}
.btn-danger {
    background-color: var(--danger-color);
    color: white;
}
.btn-icon {
    padding: 0.3rem 0.4rem;
    line-height: 1;
}
.form-group {
    margin-bottom: 1rem;
}
.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}
.form-group input,
.form-group select {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background-color: var(--bg-color);
    color: var(--text-color);
    font-size: 1rem;
}
.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}
.form-group-span-2 {
    grid-column: span 2;
}
table {
    width: 100%;
    border-collapse: collapse;
}
th,
td {
    padding: 0.75rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}
th {
    font-weight: 600;
    background-color: var(--bg-color);
}
.table-responsive {
    overflow-x: auto;
}
.status-badge {
    padding: 0.2em 0.6em;
    border-radius: 1em;
    font-size: 0.8rem;
    color: white;
    font-weight: 600;
}
.status-paid,
.status-received {
    background-color: var(--success-color);
}
.status-unpaid,
.status-pending {
    background-color: var(--danger-color);
}
.alert {
    padding: 1rem;
    border-radius: 6px;
    margin-bottom: 1rem;
}
.alert-danger {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}
.alert-success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}
.alert-info {
    background-color: #d1ecf1;
    color: #0c5460;
    border: 1px solid #bee5eb;
}
.text-success {
    color: var(--success-color);
}
.text-danger {
    color: var(--danger-color);
}
.theme-toggle {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-muted-color);
}
.icon-moon {
    display: none;
}
.icon-sun {
    display: block;
}
html.dark .icon-moon {
    display: block;
}
html.dark .icon-sun {
    display: none;
}
.filter-form {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    align-items: center;
}
.report-summary div {
    display: flex;
    justify-content: space-between;
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--border-color);
}
.report-summary span {
    font-weight: 600;
}
.report-actions {
    margin-top: 1.5rem;
    display: flex;
    gap: 1rem;
}
.calculation-preview {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}
.calc-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.calc-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-muted-color);
}
.calc-value {
    font-weight: 600;
    font-size: 1.1rem;
}
.calc-row.emphasis .calc-value {
    color: var(--accent-color);
    font-size: 1.2rem;
}
.calculation-preview hr {
    border: none;
    border-top: 1px solid var(--border-color);
    margin: 0.5rem 0;
}
.calc-total {
    background-color: var(--accent-color);
    color: white;
    margin-top: 1rem;
    padding: 1rem;
    border-radius: 8px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.calc-total .calc-label {
    font-size: 1.1rem;
    font-weight: 600;
    color: white;
}
.calc-total .calc-value {
    font-size: 1.5rem;
    font-weight: 700;
}
.chart-container {
    position: relative;
    height: 350px;
    width: 100%;
}
.chart-container-pie {
    position: relative;
    height: 300px;
    max-width: 300px;
    margin: auto;
}
.no-data-message {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    padding: 2rem;
    color: var(--text-muted-color);
    text-align: center;
}
.no-data-message i {
    width: 48px;
    height: 48px;
    margin-bottom: 1rem;
    stroke-width: 1.5;
}
.no-data-message p {
    font-size: 1.1rem;
    font-weight: 500;
}
/* --- TOAST NOTIFICATIONS & ALERTS --- */
.toast {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translate(-50%, 100px);
    background-color: var(--accent-color);
    color: white;
    padding: 1rem 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    z-index: 10000;
    opacity: 0;
    transition: transform 0.3s ease, opacity 0.3s ease;
    font-weight: 600;
}
.toast.show {
    transform: translate(-50%, 0);
    opacity: 1;
}
.alert-card {
    background-color: #fffbe6;
    border: 1px solid #fde68a;
    color: #a16207;
}
html.dark .alert-card {
    background-color: #4a3300;
    border-color: #785501;
    color: #fde047;
}
.alert-list {
    list-style: none;
    padding: 0;
    margin: 0;
}
.alert-list li {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 0;
}
.alert-list li+li {
    border-top: 1px solid var(--border-color);
}
.alert-list i {
    color: #facc15;
}
/* --- REPORTS PAGE TABS --- */
.tabs {
    display: flex;
    border-bottom: 2px solid var(--border-color);
    margin-bottom: 1.5rem;
}
.tab-link {
    padding: 0.75rem 1.5rem;
    cursor: pointer;
    border: none;
    background: none;
    color: var(--text-muted-color);
    font-size: 1rem;
    font-weight: 600;
    border-bottom: 2px solid transparent;
    transform: translateY(2px);
}
.tab-link.active {
    color: var(--accent-color);
    border-bottom-color: var(--accent-color);
}
.tab-content {
    display: none;
}
.tab-content.active {
    display: block;
}
/* --- PROFILE PAGE --- */
.profile-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 1.5rem;
    margin-bottom: 2rem;
}
@media (min-width: 768px) {
    .profile-header {
        flex-direction: row;
        text-align: left;
    }
}
.profile-avatar {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    background-color: var(--accent-color);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    font-weight: 600;
}
.profile-name h2 {
    font-size: 2rem;
    margin: 0;
}
.profile-name p {
    color: var(--text-muted-color);
}
/* --- FORM RADIO TOGGLE --- */
.radio-group {
    display: flex;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
}
.radio-group input[type="radio"] {
    display: none;
}
.radio-group label {
    flex: 1;
    text-align: center;
    padding: 0.75rem;
    cursor: pointer;
    color: var(--text-muted-color);
    background-color: var(--bg-color);
    transition: background-color 0.2s, color 0.2s;
    font-weight: 500;
}
.radio-group label:not(:last-child) {
    border-right: 1px solid var(--border-color);
}
.radio-group input[type="radio"]:checked+label {
    background-color: var(--accent-color);
    color: white;
}
/* --- PRINT & RESPONSIVE --- */
@media print {
    body {
        background-color: white;
        color: black;
    }
    .sidebar,
    .main-header,
    .report-actions,
    .main-footer,
    .filter-form,
    .theme-toggle,
    .logout-btn {
        display: none;
    }
    .app-layout {
        display: block;
    }
    .main-content {
        margin-left: 0;
        padding: 0;
    }
    .card {
        box-shadow: none;
        border: 1px solid #ccc;
    }
}
@media (max-width: 480px) {
    .form-grid {
        grid-template-columns: 1fr;
    }
    .form-group-span-2 {
        grid-column: span 1;
    }
}

/* --- FOOTER LINK --- */
.footer-link {
    color: var(--accent-color);
    text-decoration: none; /* No underline by default */
    font-weight: 600;
    position: relative;
    padding-bottom: 2px;
    transition: color 0.3s ease;
}
.footer-link:hover {
    color: var(--accent-hover-color); /* Darken color on hover */
}
/* Animated underline effect */
.footer-link::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 1px;
    bottom: 0;
    left: 0;
    background-color: var(--accent-hover-color);
    transform: scaleX(0);
    transform-origin: bottom right;
    transition: transform 0.3s ease-out;
}
.footer-link:hover::after {
    transform: scaleX(1);
    transform-origin: bottom left;
}

/* --- HEADER NOTIFICATIONS --- */
.main-header {
    justify-content: space-between;
}
.header-left, .header-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}
.notifications-wrapper {
    position: relative;
}
.notifications-toggle {
    background: none;
    border: none;
    cursor: pointer;
    position: relative;
    color: var(--text-muted-color);
}
.notifications-toggle:hover {
    color: var(--text-color);
}
.notification-badge {
    position: absolute;
    top: -5px;
    right: -5px;
    background-color: var(--danger-color);
    color: white;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    font-size: 10px;
    font-weight: bold;
    display: flex;
    justify-content: center;
    align-items: center;
    border: 2px solid var(--bg-secondary-color);
}
.notifications-panel {
    position: absolute;
    top: calc(100% + 10px);
    right: 0;
    width: 300px;
    background-color: var(--bg-secondary-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: var(--shadow);
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0s 0.2s;
}
.notifications-panel.is-open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    transition: opacity 0.2s ease, transform 0.2s ease;
}
.notifications-header {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border-color);
}
.notifications-header h3 {
    margin: 0;
    padding: 0;
    border: none;
    font-size: 1rem;
    font-weight: 600;
}
.notification-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    font-size: 0.9rem;
    color: var(--text-color);
    text-decoration: none;
}
.notification-item:not(.empty) {
    transition: background-color 0.2s;
}
.notification-item:not(.empty):hover {
    background-color: var(--bg-color);
}
.notification-item + .notification-item {
    border-top: 1px solid var(--border-color);
}
.notification-item.empty {
    color: var(--text-muted-color);
    justify-content: center;
}
.notification-item i {
    flex-shrink: 0;
    color: var(--accent-color);
}

/* --- CALENDAR STYLES --- */
.fc-event {
    cursor: pointer;
    border: none !important;
    padding: 4px 6px;
}
.fc-event-title {
    display: flex;
    align-items: center;
    gap: 6px;
    font-weight: 500;
}
.fc-event-title .lucide {
    width: 14px;
    height: 14px;
    stroke-width: 2.5;
}
.fc-daygrid-day.fc-day-today {
    background-color: rgba(46, 139, 87, 0.1);
}
html.dark .fc-daygrid-day.fc-day-today {
     background-color: rgba(46, 139, 87, 0.2);
}

/* --- CALENDAR RESPONSIVE FIX --- */
@media (max-width: 576px) {
    .fc-header-toolbar {
        flex-direction: column;
        align-items: flex-start !important;
        gap: 10px;
    }
    .fc-header-toolbar .fc-toolbar-chunk {
        display: flex;
        align-items: center;
    }
}