:root {
    /* Vibrant Palette */
    --primary-color: #6366f1;
    /* Indigo 500 */
    --primary-hover: #4f46e5;
    /* Indigo 600 */
    --secondary-color: #ec4899;
    /* Pink 500 */
    --bg-color: #f3f4f6;
    /* Gray 100 */
    --card-bg: #ffffff;
    --white: #ffffff;
    --text-color: #1f2937;
    /* Gray 800 */
    --text-muted: #6b7280;
    /* Gray 500 */
    --border-color: #e5e7eb;
    /* Gray 200 */

    /* Status Colors */
    --success-bg: #dcfce7;
    /* Green 100 */
    --success-text: #166534;
    /* Green 800 */
    --success-border: #86efac;
    /* Green 300 */

    --danger-bg: #fee2e2;
    /* Red 100 */
    --danger-text: #991b1b;
    /* Red 800 */
    --danger-border: #fca5a5;
    /* Red 300 */

    --warning-bg: #fef3c7;
    /* Amber 100 */
    --warning-text: #92400e;
    /* Amber 800 */

    /* UI Elements */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --radius: 0.75rem;
    /* More rounded */
}

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

body {
    font-family: 'Outfit', 'Inter', system-ui, -apple-system, sans-serif;
    /* Modern font stack */
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navbar */
.navbar {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid var(--border-color);
}

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

.logo {
    font-size: 1.75rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-decoration: none;
    letter-spacing: -0.025em;
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 1rem;
    align-items: center;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 600;
    transition: all 0.2s;
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--primary-color);
    background-color: #e0e7ff;
    /* Indigo 100 */
}

/* Mobile Menu Button */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    flex-direction: column;
    gap: 6px;
}

.mobile-menu-btn span {
    display: block;
    width: 28px;
    height: 3px;
    background-color: var(--text-color);
    border-radius: 3px;
    transition: 0.3s;
}

/* Main Content */
.main-content {
    padding: 2rem 0;
    min-height: 80vh;
}

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

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-color);
    font-size: 0.95rem;
}

input[type="text"],
input[type="password"],
input[type="number"],
input[type="date"],
select,
textarea {
    width: 100%;
    padding: 0.875rem;
    border: 2px solid transparent;
    /* Prepare for focus */
    background-color: #f9fafb;
    border-radius: var(--radius);
    font-family: inherit;
    font-size: 1rem;
    transition: all 0.2s;
    box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.05);
}

input:focus,
select:focus,
textarea:focus {
    outline: none;
    background-color: var(--white);
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

button,
.btn,
.btn-secondary,
.btn-danger {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 9999px;
    /* Pill shape */
    cursor: pointer;
    font-weight: 600;
    text-align: center;
    text-decoration: none;
    transition: all 0.2s;
    font-size: 0.95rem;
    box-shadow: var(--shadow-sm);
}

button:active,
.btn:active {
    transform: scale(0.97);
}

button,
.btn {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
    color: var(--white);
}

button:hover,
.btn:hover {
    box-shadow: var(--shadow);
    filter: brightness(1.1);
    color: var(--white);
}

.btn-danger {
    background: linear-gradient(135deg, #ef4444, #dc2626);
    color: white;
}

.btn-secondary {
    background: var(--white);
    color: var(--text-color);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background-color: #f9fafb;
    border-color: #d1d5db;
}

/* Tables */
.table-wrapper {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

table {
    width: 100%;
    border-collapse: collapse;
    background: var(--white);
    overflow: hidden;
    min-width: 600px;
}

th,
td {
    padding: 1rem 1.5rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

th {
    background-color: #f8fafc;
    font-weight: 700;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.05em;
    color: var(--text-muted);
}

/* Transaction Rows Color Coding */
tr.row-payment {
    background-color: var(--danger-bg);
}

tr.row-payment td {
    color: var(--danger-text);
    border-bottom-color: var(--danger-border);
}

tr.row-receipt {
    background-color: var(--success-bg);
}

tr.row-receipt td {
    color: var(--success-text);
    border-bottom-color: var(--success-border);
}

/* Badges */
.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
}

.badge-payment {
    background-color: #fee2e2;
    color: #991b1b;
    border: 1px solid #fca5a5;
}

.badge-receipt {
    background-color: #dcfce7;
    color: #166534;
    border: 1px solid #86efac;
}

.badge-transfer {
    background-color: #e0e7ff;
    color: #3730a3;
    border: 1px solid #c7d2fe;
}

/* Cards */
.card {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    margin-bottom: 2rem;
    border: 1px solid rgba(0, 0, 0, 0.02);
}

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

.card-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-color);
}

/* Login Page */
.login-container {
    max-width: 420px;
    margin: 6rem auto;
}

.alert {
    padding: 1rem;
    border-radius: var(--radius);
    margin-bottom: 1rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.alert-error {
    background-color: var(--danger-bg);
    color: var(--danger-text);
    border: 1px solid var(--danger-border);
}

.alert-success {
    background-color: var(--success-bg);
    color: var(--success-text);
    border: 1px solid var(--success-border);
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
    .mobile-menu-btn {
        display: flex;
    }

    .nav-links {
        display: none;
        width: 100%;
        flex-direction: column;
        padding-top: 1rem;
        border-top: 1px solid var(--border-color);
        margin-top: 1rem;
        gap: 0.5rem;
    }

    .nav-links.active {
        display: flex;
    }

    .nav-links li {
        width: 100%;
    }

    .nav-links a {
        display: block;
        text-align: center;
        background-color: #f3f4f6;
    }

    .card {
        padding: 1.5rem;
    }

    .card-header {
        flex-direction: column;
        align-items: flex-start;
    }
}

/* Contact/Bank Grid & Cards */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.contact-card {
    background: var(--white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.contact-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.contact-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    opacity: 0;
    transition: opacity 0.3s;
}

.contact-card:hover::before {
    opacity: 1;
}

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

.contact-avatar {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    flex-shrink: 0;
    box-shadow: var(--shadow);
}

.contact-info h3 {
    margin: 0;
    color: var(--text-color);
    font-size: 1.15rem;
    font-weight: 700;
}

.contact-info p {
    margin: 0;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.contact-details {
    font-size: 0.95rem;
    color: #4B5563;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;

    .badge-payment {
        background-color: #fee2e2;
        color: #991b1b;
        border: 1px solid #fca5a5;
    }

    .badge-receipt {
        background-color: #dcfce7;
        color: #166534;
        border: 1px solid #86efac;
    }

    .badge-transfer {
        background-color: #e0e7ff;
        color: #3730a3;
        border: 1px solid #c7d2fe;
    }

    /* Cards */
    .card {
        background: var(--card-bg);
        padding: 2rem;
        border-radius: var(--radius);
        box-shadow: var(--shadow);
        margin-bottom: 2rem;
        border: 1px solid rgba(0, 0, 0, 0.02);
    }

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

    .card-header h2 {
        font-size: 1.5rem;
        font-weight: 700;
        color: var(--text-color);
    }

    /* Login Page */
    .login-container {
        max-width: 420px;
        margin: 6rem auto;
    }

    .alert {
        padding: 1rem;
        border-radius: var(--radius);
        margin-bottom: 1rem;
        font-weight: 500;
        display: flex;
        align-items: center;
        gap: 0.5rem;
    }

    .alert-error {
        background-color: var(--danger-bg);
        color: var(--danger-text);
        border: 1px solid var(--danger-border);
    }

    .alert-success {
        background-color: var(--success-bg);
        color: var(--success-text);
        border: 1px solid var(--success-border);
    }

    /* Mobile Responsiveness */
    @media (max-width: 768px) {
        .mobile-menu-btn {
            display: flex;
        }

        .nav-links {
            display: none;
            width: 100%;
            flex-direction: column;
            padding-top: 1rem;
            border-top: 1px solid var(--border-color);
            margin-top: 1rem;
            gap: 0.5rem;
        }

        .nav-links.active {
            display: flex;
        }

        .nav-links li {
            width: 100%;
        }

        .nav-links a {
            display: block;
            text-align: center;
            background-color: #f3f4f6;
        }

        .card {
            padding: 1.5rem;
        }

        .card-header {
            flex-direction: column;
            align-items: flex-start;
        }
    }

    /* Contact/Bank Grid & Cards */
    .contact-grid {
        display: grid;
        grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
        gap: 1.5rem;
    }

    .contact-card {
        background: var(--white);
        border: 1px solid var(--border-color);
        border-radius: var(--radius);
        padding: 1.5rem;
        display: flex;
        flex-direction: column;
        gap: 1rem;
        transition: all 0.3s ease;
        position: relative;
        overflow: hidden;
    }

    .contact-card:hover {
        transform: translateY(-4px);
        box-shadow: var(--shadow-lg);
        border-color: var(--primary-color);
    }

    .contact-card::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 4px;
        background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
        opacity: 0;
        transition: opacity 0.3s;
    }

    .contact-card:hover::before {
        opacity: 1;
    }

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

    .contact-avatar {
        width: 56px;
        height: 56px;
        background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
        color: var(--white);
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1.5rem;
        font-weight: 700;
        flex-shrink: 0;
        box-shadow: var(--shadow);
    }

    .contact-info h3 {
        margin: 0;
        color: var(--text-color);
        font-size: 1.15rem;
        font-weight: 700;
    }

    .contact-info p {
        margin: 0;
        color: var(--text-muted);
        font-size: 0.9rem;
    }

    .contact-details {
        font-size: 0.95rem;
        color: #4B5563;
        display: flex;
        flex-direction: column;
        gap: 0.5rem;
        background: #f9fafb;
        padding: 1rem;
        border-radius: 0.5rem;
    }

    .contact-actions {
        margin-top: auto;
        padding-top: 1rem;
        border-top: 1px solid var(--border-color);
        display: flex;
        justify-content: flex-end;
        gap: 0.75rem;
    }

    /* Responsive Table Styles */
    .toggle-btn {
        display: none;
    }

    @media (max-width: 768px) {
        .responsive-table thead {
            display: none;
        }

        .responsive-table tr {
            display: block;
            margin-bottom: 1rem;
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            background: var(--white);
            box-shadow: var(--shadow-sm);
        }

        .responsive-table td {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 0.75rem 1rem;
            border-bottom: 1px solid var(--border-color);
            text-align: right;
        }

        .responsive-table td::before {
            content: attr(data-label);
            font-weight: 600;
            color: var(--text-muted);
            text-align: left;
            margin-right: auto;
            /* Push content to right */
        }

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

        /* Toggle Button */
        .responsive-table .toggle-btn {
            display: flex !important;
            justify-content: center;
            align-items: center;
            background-color: #f9fafb;
            cursor: pointer;
            font-size: 1.25rem;
            color: var(--primary-color);
            padding: 0.5rem;
            border-bottom: 1px solid var(--border-color);
        }

        .responsive-table .toggle-btn::before {
            content: 'View Details';
            /* Or just icon */
            margin-right: 0.5rem;
            font-size: 0.9rem;
        }

        /* Visibility Logic */
        .responsive-table td:not(.main-col):not(.toggle-btn) {
            display: none;
        }

        .responsive-table tr.expanded td {
            display: flex;
        }

        padding-top: 1rem;
        border-top: 1px solid var(--border-color);
        margin-top: 1rem;
        gap: 0.5rem;
    }

    .nav-links.active {
        display: flex;
    }

    .nav-links li {
        width: 100%;
    }

    .nav-links a {
        display: block;
        text-align: center;
        background-color: #f3f4f6;
    }

    .card {
        padding: 1.5rem;
    }

    .card-header {
        flex-direction: column;
        align-items: flex-start;
    }
}

/* Contact/Bank Grid & Cards */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.contact-card {
    background: var(--white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.contact-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.contact-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    opacity: 0;
    transition: opacity 0.3s;
}

.contact-card:hover::before {
    opacity: 1;
}

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

.contact-avatar {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    flex-shrink: 0;
    box-shadow: var(--shadow);
}

.contact-info h3 {
    margin: 0;
    color: var(--text-color);
    font-size: 1.15rem;
    font-weight: 700;
}

.contact-info p {
    margin: 0;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.contact-details {
    font-size: 0.95rem;
    color: #4B5563;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    background: #f9fafb;
    padding: 1rem;
    border-radius: 0.5rem;
}

.contact-actions {
    margin-top: auto;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
}

/* Responsive Table Styles */
.toggle-btn {
    display: none;
}

@media (max-width: 768px) {
    .responsive-table thead {
        display: none;
    }

    .responsive-table tr {
        display: block;
        margin-bottom: 1rem;
        border: 1px solid var(--border-color);
        border-radius: var(--radius);
        background: var(--white);
        box-shadow: var(--shadow-sm);
    }

    .responsive-table td {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 0.75rem 1rem;
        border-bottom: 1px solid var(--border-color);
        text-align: right;
    }

    .responsive-table td::before {
        content: attr(data-label);
        font-weight: 600;
        color: var(--text-muted);
        text-align: left;
        margin-right: auto;
        /* Push content to right */
    }

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

    /* Toggle Button */
    .responsive-table .toggle-btn {
        display: flex !important;
        justify-content: center;
        align-items: center;
        background-color: #f9fafb;
        cursor: pointer;
        font-size: 1.25rem;
        color: var(--primary-color);
        padding: 0.5rem;
        border-bottom: 1px solid var(--border-color);
    }

    .responsive-table .toggle-btn::before {
        content: 'View Details';
        /* Or just icon */
        margin-right: 0.5rem;
        font-size: 0.9rem;
    }

    /* Visibility Logic */
    .responsive-table td:not(.main-col):not(.toggle-btn) {
        display: none;
    }

    .responsive-table tr.expanded td {
        display: flex;
    }

    .responsive-table tr.expanded .toggle-btn {
        background-color: #e0e7ff;
    }

    .responsive-table tr.expanded .toggle-btn::after {
        content: '-';
        font-weight: bold;
        margin-left: 0.5rem;
    }

    .responsive-table .toggle-btn::after {
        content: '+';
        font-weight: bold;
        margin-left: 0.5rem;
    }
}

/* Dynamic Transaction Colors */
.bg-payment {
    background-color: #fff1f2 !important;
    /* Very Light Red */
    border: 1px solid #fecdd3;
    transition: background-color 0.3s ease;
}

.bg-payment input,
.bg-payment select,
.bg-payment textarea {
    background-color: #fff;
    border-color: #fecdd3;
}

.bg-payment input:focus,
.bg-payment select:focus,
.bg-payment textarea:focus {
    border-color: #e11d48;
    /* Red 600 */
    box-shadow: 0 0 0 3px rgba(225, 29, 72, 0.1);
}

.bg-receipt {
    background-color: #f0fdf4 !important;
    /* Very Light Green */
    border: 1px solid #bbf7d0;
    transition: background-color 0.3s ease;
}

.bg-receipt input,
.bg-receipt select,
.bg-receipt textarea {
    background-color: #fff;
    border-color: #bbf7d0;
}

.bg-receipt input:focus,
.bg-receipt select:focus,
.bg-receipt textarea:focus {
    border-color: #16a34a;
    /* Green 600 */
    box-shadow: 0 0 0 3px rgba(22, 163, 74, 0.1);
}