:root {
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --primary: #8b5cf6;
    --secondary: #3b82f6;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --success: #10b981;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-main);
}

.container {
    max-width: 480px; /* App-like max width */
    margin: 0 auto;
    padding: 20px;
    min-height: 100vh;
}

/* Forms & Cards */
.card {
    background: var(--card-bg);
    border-radius: 16px;
    padding: 24px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    margin-bottom: 20px;
}

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

.input-group label {
    display: block;
    margin-bottom: 5px;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.input-group input {
    width: 100%;
    padding: 12px;
    border-radius: 8px;
    border: 1px solid #334155;
    background: #0f172a;
    color: white;
    outline: none;
}

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

/* Buttons */
.btn-primary {
    width: 100%;
    padding: 14px;
    border: none;
    border-radius: 8px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    font-weight: bold;
    cursor: pointer;
    transition: opacity 0.2s;
}

.btn-primary:hover {
    opacity: 0.9;
}

/* Dashboard Specific */
.balance-card {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    text-align: center;
    padding: 30px;
}

.balance-card h2 {
    font-size: 2.5rem;
    margin: 10px 0;
}

.nav-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

.nav-item {
    background: var(--card-bg);
    padding: 20px;
    text-align: center;
    border-radius: 12px;
    text-decoration: none;
    color: white;
    font-weight: 500;
    transition: transform 0.2s;
}

.nav-item:hover {
    transform: translateY(-2px);
}