:root {
    --primary: #00f2ea;
    --secondary: #ff0050;
    --bg-dark: #050505;
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --text-main: #fff;
    --text-muted: #a0a0a0;
    --green: #00ff88;
    --red: #ff4466;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Outfit', sans-serif;
}

body {
    background: #0a0a1a;
    color: var(--text-main);
    min-height: 100vh;
    padding: 40px 20px;
}

.container {
    max-width: 600px;
    margin: 0 auto;
}

h1 {
    font-size: 2rem;
    text-align: center;
    margin-bottom: 10px;
    background: linear-gradient(to right, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.subtitle {
    text-align: center;
    color: var(--text-muted);
    margin-bottom: 30px;
}

/* Summary Cards */
.summary {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 12px;
    margin-bottom: 25px;
}

.summary-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 15px;
    padding: 20px;
    text-align: center;
}

.summary-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 5px;
}

.summary-value {
    font-size: 1.4rem;
    font-weight: 700;
}

.summary-value.income {
    color: var(--green);
}

.summary-value.expense {
    color: var(--red);
}

.summary-value.balance {
    color: var(--primary);
}

/* Form */
.add-form {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 15px;
    padding: 20px;
    margin-bottom: 25px;
}

.form-row {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.form-group {
    flex: 1;
    min-width: 120px;
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.form-group label {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.form-group input,
.form-group select {
    background: var(--bg-dark);
    border: 1px solid var(--glass-border);
    border-radius: 10px;
    padding: 10px 12px;
    color: #fff;
    font-size: 0.9rem;
    outline: none;
}

.form-group input:focus,
.form-group select:focus {
    border-color: var(--primary);
}

.add-btn {
    width: 100%;
    margin-top: 15px;
    background: var(--primary);
    color: #000;
    border: none;
    border-radius: 10px;
    padding: 12px;
    font-weight: 700;
    font-size: 1rem;
    cursor: pointer;
    transition: background 0.3s;
}

.add-btn:hover {
    background: var(--secondary);
    color: #fff;
}

/* Filter */
.filter-bar {
    display: flex;
    gap: 8px;
    margin-bottom: 15px;
    flex-wrap: wrap;
}

.filter-btn {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 8px 16px;
    color: var(--text-muted);
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.3s;
    font-weight: 500;
    font-family: 'Outfit', sans-serif;
}

.filter-btn.active {
    background: var(--primary);
    color: #000;
    border-color: var(--primary);
    font-weight: 700;
}

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

/* Transactions List */
.transactions {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.transaction {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 15px 18px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: transform 0.2s;
}

.transaction:hover {
    transform: translateX(5px);
}

.tx-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.tx-icon {
    font-size: 1.5rem;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 10px;
}

.tx-info h4 {
    font-size: 0.95rem;
    margin-bottom: 3px;
}

.tx-info p {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.tx-right {
    display: flex;
    align-items: center;
    gap: 12px;
}

.tx-amount {
    font-size: 1.05rem;
    font-weight: 700;
}

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

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

.delete-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 1.1rem;
    transition: color 0.2s;
    padding: 5px;
}

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

.no-transactions {
    text-align: center;
    color: var(--text-muted);
    padding: 30px;
    font-size: 0.95rem;
}

/* Back Link */
.back-link {
    position: fixed;
    top: 20px;
    left: 20px;
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    z-index: 10;
}

.back-link:hover {
    color: var(--secondary);
}

/* Responsive */
@media (max-width: 500px) {
    .summary {
        grid-template-columns: 1fr;
    }

    .form-row {
        flex-direction: column;
    }
}