@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

:root {
    --bg-color: #000000;
    --text-main: #ffffff;
    --text-muted: #888888;
    --card-bg: #111111;
    --border-color: #333333;
    --accent-color: #ffffff;
    --success-color: #4ade80;
    --danger-color: #f87171;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.5;
    min-height: 100vh;
}

a {
    text-decoration: none;
    color: var(--text-main);
}

.container {
    max-width: 600px;
    margin: 0 auto;
    padding: 20px;
}

/* Header */
.header {
    text-align: center;
    padding: 30px 0;
    margin-bottom: 20px;
}

.header h1 {
    font-weight: 800;
    font-size: 2rem;
    letter-spacing: -1px;
}

/* Cards */
.card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 25px;
    margin-bottom: 20px;
}

.balance-card {
    text-align: center;
    background: linear-gradient(135deg, #222, #111);
}

.balance-card h3 {
    font-size: 1rem;
    color: var(--text-muted);
    font-weight: 500;
    margin-bottom: 10px;
}

.balance-card .amount {
    font-size: 3rem;
    font-weight: 800;
    letter-spacing: -2px;
}

.balance-card .currency {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-muted);
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-muted);
    font-size: 0.9rem;
    font-weight: 500;
}

.form-control {
    width: 100%;
    padding: 15px;
    background-color: #000;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    color: var(--text-main);
    font-size: 1rem;
    transition: border-color 0.3s;
}

.form-control:focus {
    outline: none;
    border-color: var(--text-main);
}

/* Buttons */
.btn {
    display: block;
    width: 100%;
    padding: 16px;
    text-align: center;
    border-radius: 12px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: opacity 0.2s;
}

.btn:active {
    opacity: 0.8;
}

.btn-primary {
    background-color: var(--text-main);
    color: var(--bg-color);
}

.btn-outline {
    background-color: transparent;
    border: 1px solid var(--text-main);
    color: var(--text-main);
}

/* Transaction List */
.transaction-list {
    list-style: none;
}

.transaction-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
    border-bottom: 1px solid var(--border-color);
}

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

.t-info {
    display: flex;
    flex-direction: column;
}

.t-title {
    font-weight: 600;
    font-size: 1.05rem;
}

.t-date {
    font-size: 0.8rem;
    color: var(--text-muted);
}

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

.t-amount.positive {
    color: var(--success-color);
}

.t-amount.negative {
    color: var(--text-main);
}

/* Alerts */
.alert {
    padding: 15px;
    border-radius: 12px;
    margin-bottom: 20px;
    font-size: 0.95rem;
}

.alert-error {
    background-color: rgba(248, 113, 113, 0.1);
    border: 1px solid rgba(248, 113, 113, 0.2);
    color: var(--danger-color);
}

.alert-success {
    background-color: rgba(74, 222, 128, 0.1);
    border: 1px solid rgba(74, 222, 128, 0.2);
    color: var(--success-color);
}