:root {
    --primary-bg: #0a0e12;
    --secondary-bg: #151a1f;
    --accent-bg: #1a2229;
    --border-color: #2a3f4d;
    --accent-green: #3dd68c;
    --accent-red: #ff4757;
    --accent-yellow: #ffa502;
    --accent-blue: #1e90ff;
    --text-primary: #e8f0f2;
    --text-secondary: #8b9da8;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
    --glow: 0 0 10px rgba(61, 214, 140, 0.3);
}

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

body {
    font-family: 'Courier New', monospace;
    background: linear-gradient(135deg, var(--primary-bg) 0%, #0d1419 100%);
    color: var(--text-primary);
    min-height: 100vh;
    background-attachment: fixed;
}

/* Login Screen */
.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
}

.login-box {
    background: var(--secondary-bg);
    border: 2px solid var(--border-color);
    border-radius: 10px;
    padding: 40px;
    max-width: 400px;
    width: 100%;
    box-shadow: var(--shadow);
    position: relative;
    overflow: hidden;
}

.login-box::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(45deg, var(--accent-green), var(--accent-blue), var(--accent-green));
    border-radius: 10px;
    z-index: -1;
    opacity: 0.3;
    filter: blur(10px);
}

.login-box h1 {
    text-align: center;
    margin-bottom: 10px;
    color: var(--accent-green);
    text-transform: uppercase;
    letter-spacing: 3px;
    font-size: 24px;
    text-shadow: 0 0 10px var(--accent-green);
}

.login-box .subtitle {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 30px;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 2px;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-secondary);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.form-group input {
    width: 100%;
    padding: 12px;
    background: var(--accent-bg);
    border: 1px solid var(--border-color);
    border-radius: 5px;
    color: var(--text-primary);
    font-family: 'Courier New', monospace;
    font-size: 14px;
    transition: all 0.3s;
}

.form-group input:focus {
    outline: none;
    border-color: var(--accent-green);
    box-shadow: var(--glow);
}

.btn {
    width: 100%;
    padding: 12px;
    background: var(--accent-green);
    border: none;
    border-radius: 5px;
    color: var(--primary-bg);
    font-family: 'Courier New', monospace;
    font-size: 14px;
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 2px;
    cursor: pointer;
    transition: all 0.3s;
    box-shadow: 0 4px 15px rgba(61, 214, 140, 0.3);
}

.btn:hover {
    background: #2fc77d;
    box-shadow: 0 6px 20px rgba(61, 214, 140, 0.5);
    transform: translateY(-2px);
}

.btn:active {
    transform: translateY(0);
}

.error-message {
    background: rgba(255, 71, 87, 0.1);
    border: 1px solid var(--accent-red);
    color: var(--accent-red);
    padding: 10px;
    border-radius: 5px;
    margin-bottom: 20px;
    font-size: 12px;
    text-align: center;
    display: none;
}

.error-message.show {
    display: block;
}

/* Main Dashboard */
.dashboard {
    display: none;
    padding: 20px;
    max-width: 1400px;
    margin: 0 auto;
}

.dashboard.active {
    display: block;
}

/* Header */
.header {
    background: var(--secondary-bg);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 20px;
    margin-bottom: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow);
}

.header h1 {
    color: var(--accent-green);
    font-size: 28px;
    text-transform: uppercase;
    letter-spacing: 3px;
    text-shadow: 0 0 10px var(--accent-green);
}

.header-actions {
    display: flex;
    gap: 10px;
}

.btn-small {
    padding: 8px 16px;
    background: var(--accent-bg);
    border: 1px solid var(--border-color);
    border-radius: 5px;
    color: var(--text-primary);
    font-family: 'Courier New', monospace;
    font-size: 12px;
    text-transform: uppercase;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-small:hover {
    border-color: var(--accent-green);
    box-shadow: var(--glow);
}

.btn-logout {
    background: var(--accent-red);
    border-color: var(--accent-red);
    color: white;
}

.btn-logout:hover {
    background: #e63946;
    box-shadow: 0 0 10px rgba(255, 71, 87, 0.5);
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 20px;
}

.stat-card {
    background: var(--secondary-bg);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 20px;
    box-shadow: var(--shadow);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--accent-green);
}

.stat-card.income::before {
    background: var(--accent-green);
}

.stat-card.expenses::before {
    background: var(--accent-red);
}

.stat-card.balance::before {
    background: var(--accent-blue);
}

.stat-card.bills::before {
    background: var(--accent-yellow);
}

.stat-label {
    color: var(--text-secondary);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 10px;
}

.stat-value {
    font-size: 32px;
    font-weight: bold;
    color: var(--text-primary);
}

.stat-value.positive {
    color: var(--accent-green);
}

.stat-value.negative {
    color: var(--accent-red);
}

/* Content Grid */
.content-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 20px;
    margin-bottom: 20px;
}

.panel {
    background: var(--secondary-bg);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 20px;
    box-shadow: var(--shadow);
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--border-color);
}

.panel-title {
    color: var(--accent-green);
    font-size: 18px;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.panel-content {
    max-height: 400px;
    overflow-y: auto;
}

/* Custom Scrollbar */
.panel-content::-webkit-scrollbar {
    width: 8px;
}

.panel-content::-webkit-scrollbar-track {
    background: var(--accent-bg);
    border-radius: 4px;
}

.panel-content::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

.panel-content::-webkit-scrollbar-thumb:hover {
    background: var(--accent-green);
}

/* Forms */
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-bottom: 15px;
}

.form-row.full {
    grid-template-columns: 1fr;
}

.input-group {
    margin-bottom: 15px;
}

.input-group label {
    display: block;
    margin-bottom: 5px;
    color: var(--text-secondary);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.input-group input,
.input-group select,
.input-group textarea {
    width: 100%;
    padding: 10px;
    background: var(--accent-bg);
    border: 1px solid var(--border-color);
    border-radius: 5px;
    color: var(--text-primary);
    font-family: 'Courier New', monospace;
    font-size: 13px;
    transition: all 0.3s;
}

.input-group input:focus,
.input-group select:focus,
.input-group textarea:focus {
    outline: none;
    border-color: var(--accent-green);
    box-shadow: var(--glow);
}

.input-group textarea {
    resize: vertical;
    min-height: 60px;
}

/* Transaction/Bill Items */
.item-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.item {
    background: var(--accent-bg);
    border: 1px solid var(--border-color);
    border-radius: 5px;
    padding: 15px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.3s;
}

.item:hover {
    border-color: var(--accent-green);
    box-shadow: var(--glow);
}

.item-info {
    flex: 1;
}

.item-title {
    color: var(--text-primary);
    font-size: 14px;
    font-weight: bold;
    margin-bottom: 5px;
}

.item-details {
    color: var(--text-secondary);
    font-size: 11px;
}

.item-amount {
    font-size: 18px;
    font-weight: bold;
    margin-right: 15px;
}

.item-amount.income {
    color: var(--accent-green);
}

.item-amount.expense {
    color: var(--accent-red);
}

.item-actions {
    display: flex;
    gap: 5px;
}

.btn-icon {
    padding: 6px 10px;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 3px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.3s;
    font-size: 12px;
}

.btn-icon:hover {
    border-color: var(--accent-red);
    color: var(--accent-red);
}

.empty-state {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-secondary);
}

.empty-state-icon {
    font-size: 48px;
    margin-bottom: 10px;
    opacity: 0.3;
}

/* Tabs */
.tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
}

.tab {
    padding: 10px 20px;
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    color: var(--text-secondary);
    font-family: 'Courier New', monospace;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 1px;
    cursor: pointer;
    transition: all 0.3s;
}

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

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

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    z-index: 1000;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--secondary-bg);
    border: 2px solid var(--border-color);
    border-radius: 10px;
    padding: 30px;
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.7);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--border-color);
}

.modal-title {
    color: var(--accent-green);
    font-size: 18px;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.btn-close {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 24px;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-close:hover {
    color: var(--accent-red);
}

/* Responsive */
@media (max-width: 768px) {
    .content-grid {
        grid-template-columns: 1fr;
    }
    
    .header {
        flex-direction: column;
        gap: 15px;
    }
    
    .header-actions {
        width: 100%;
        justify-content: center;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.stat-card,
.panel,
.item {
    animation: fadeIn 0.5s ease-out;
}

/* Loading State */
.loading {
    text-align: center;
    padding: 20px;
    color: var(--text-secondary);
}

.loading::after {
    content: '...';
    animation: dots 1.5s steps(4, end) infinite;
}

@keyframes dots {
    0%, 20% {
        content: '.';
    }
    40% {
        content: '..';
    }
    60%, 100% {
        content: '...';
    }
}