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

body {
    font-family: 'Segoe UI', sans-serif;
    background-color: #0F172A;
    color: #E2E8F0;
    min-height: 100vh;
}

/* Header */
header {
    background-color: #1E293B;
    padding: 20px;
    text-align: center;
}

.tagline {
    margin-top: 10px;
    font-size: 14px;
}

nav a {
    margin: 0 10px;
    text-decoration: none;
    color: #38BDF8;
    font-weight: bold;
}

nav a:hover {
    color: #FACC15;
}

/* Layout */
.container {
    display: flex;
    gap: 30px;
    padding: 30px;
    justify-content: center;
    flex-wrap: wrap;
}

/* Form  */
.task-form {
    background-color: #1E293B;
    padding: 20px;
    border-radius: 8px;
    width: 300px;
}

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

input, select {
    width: 100%;
    padding: 8px;
    border-radius: 5px;
    border: none;
    margin-top: 5px;
}

button {
    width: 100%;
    padding: 10px;
    background-color: #38BDF8;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-weight: bold;
}

button:hover {
    background-color: #0EA5E9;
}

/* Task Display */
.task-display {
    background-color: #1E293B;
    padding: 20px;
    border-radius: 8px;
    width: 400px;
}

.task-card {
    background-color: #334155;
    padding: 15px;
    margin-bottom: 15px;
    border-radius: 6px;
}

.task-card.completed {
    text-decoration: line-through;
    opacity: 0.6;
}

/* Footer */
footer {
    text-align: center;
    padding: 15px;
    background-color: #1E293B;
    margin-top: 30px;
}

/* Error Text */
.error {
    color: red;
    font-size: 12px;
}

/* Responsive */
@media (max-width: 768px) {
    .container {
        flex-direction: column;
        align-items: center;
    }

    .task-form, .task-display {
        width: 90%;
    }
}