:root {
    --primary: #00a8ff;
    --dark: #2f3640;
    --light: #f5f6fa;
    --danger: #e84118;
    --success: #4cd137;
}

body { font-family: 'Segoe UI', sans-serif; background-color: #dff9fb; margin: 0; color: var(--dark); }
nav { background: white; padding: 1rem 2rem; display: flex; justify-content: space-between; align-items: center; box-shadow: 0 2px 5px rgba(0,0,0,0.1); }
.logo { font-size: 1.5rem; font-weight: bold; color: var(--primary); }
.container { max-width: 800px; margin: 2rem auto; padding: 0 1rem; }
.hidden { display: none !important; }
.card { background: white; padding: 1.5rem; border-radius: 12px; box-shadow: 0 4px 15px rgba(0,0,0,0.05); margin-bottom: 1.5rem; }
.balance-card { text-align: center; background: linear-gradient(135deg, #00a8ff, #0097e6); color: white; }
.amount { font-size: 2.5rem; font-weight: bold; margin-top: 0.5rem; }
.btn-logout { background: var(--danger); color: white; border: none; padding: 8px 16px; border-radius: 5px; cursor: pointer; }
.admin-header { background: #8e44ad; color: white; padding: 1rem; border-radius: 8px; margin-bottom: 1rem; text-align: center; font-weight: bold; }

/* Forms & Lists */
input, select { padding: 10px; margin: 5px 0; width: 100%; box-sizing: border-box; border: 1px solid #ccc; border-radius: 5px; }
button[type="submit"] { width: 100%; background: var(--success); color: white; border: none; padding: 12px; border-radius: 5px; cursor: pointer; font-size: 1rem; margin-top: 10px; }
.transaction-list { list-style: none; padding: 0; }
.transaction-list li { border-bottom: 1px solid #eee; padding: 10px 0; display: flex; justify-content: space-between; }
.t-plus { color: var(--success); font-weight: bold; }
.t-minus { color: var(--danger); font-weight: bold; }

/* Tables */
table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
th, td { text-align: left; padding: 8px; border-bottom: 1px solid #ddd; }
.scroll-box { max-height: 300px; overflow-y: auto; }