:root {
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --secondary-color: #a855f7;
    --bg-color: #f8fafc;
    --card-bg: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --border-radius: 16px;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --font-family: 'Inter', system-ui, -apple-system, sans-serif;
}

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

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.5;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    padding: 2rem;
}

.container {
    width: 100%;
    max-width: 1000px;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.header {
    text-align: center;
    margin-bottom: 1rem;
}

.header h1 {
    font-size: 2.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.5rem;
}

.header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.dashboard {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.card {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

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

.balance-card {
    grid-column: 1 / -1;
    text-align: center;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
}

.balance-title {
    font-size: 1.1rem;
    opacity: 0.9;
    margin-bottom: 0.5rem;
}

.balance-amount {
    font-size: 3rem;
    font-weight: 800;
}

.summary-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-top: 1.5rem;
}

.summary-item {
    background: rgba(255, 255, 255, 0.2);
    padding: 1rem;
    border-radius: 12px;
    backdrop-filter: blur(5px);
}

.summary-label {
    font-size: 0.9rem;
    opacity: 0.9;
}

.summary-value {
    font-size: 1.5rem;
    font-weight: 700;
}

.summary-value.income {
    color: #ccfbf1;
}

.summary-value.expense {
    color: #fecaca;
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid #e2e8f0;
    border-radius: 10px;
    font-size: 1rem;
    transition: border-color 0.2s;
    outline: none;
    font-family: inherit;
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.btn {
    width: 100%;
    padding: 0.75rem;
    border: none;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    font-family: inherit;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
}

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

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

.btn-danger:hover {
    filter: brightness(110%);
}

.list-container {
    margin-top: 1rem;
    max-height: 300px;
    overflow-y: auto;
}

.transaction-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    border-bottom: 1px solid #f1f5f9;
    animation: slideIn 0.3s ease;
}

.transaction-item:last-child {
    border-bottom: none;
}

@keyframes slideIn {
    from { opacity: 0; transform: translateX(-10px); }
    to { opacity: 1; transform: translateX(0); }
}

.transaction-info h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.transaction-info span {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.transaction-amount {
    font-weight: 700;
    font-size: 1.1rem;
}

.transaction-amount.plus {
    color: var(--success-color);
}

.transaction-amount.minus {
    color: var(--danger-color);
}

.delete-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    margin-left: 1rem;
    padding: 0.5rem;
    border-radius: 50%;
    transition: all 0.2s;
}

.delete-btn:hover {
    color: var(--danger-color);
    background-color: #fee2e2;
}

.recommendations {
    grid-column: 1 / -1;
    background-color: #fffbeb;
    border: 1px solid #fcd34d;
}

.recommendation-list {
    list-style: none;
    padding: 0;
}

.recommendation-item {
    display: flex;
    gap: 1rem;
    padding: 0.75rem 0;
    border-bottom: 1px solid rgba(245, 158, 11, 0.2);
    align-items: flex-start;
}

.recommendation-item:last-child {
    border-bottom: none;
}

.icon {
    font-size: 1.5rem;
}

h2 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

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

::-webkit-scrollbar-track {
    background: #f1f5f9;
}

::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #94a3b8;
}