body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f4f4f9;
    color: #333;
    margin: 40px;
}

.container {
    background: #fff;
    padding: 30px;
    border-radius: 10px;
    max-width: 800px;
    margin: auto;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

h1 {
    color: #2c3e50;
    margin-bottom: 20px;
}

a {
    color: #3498db;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

/* Stylish list */
ul {
    list-style: none;
    padding: 0;
}

ul li {
    background-color: #ecf0f1;
    margin-bottom: 10px;
    padding: 12px 18px;
    border-radius: 6px;
    transition: background-color 0.3s;
}

ul li:hover {
    background-color: #d0e4f0;
}

hr {
    border: none;
    height: 1px;
    background: linear-gradient(to right, #ccc, #eee, #ccc);
    margin: 30px 0;
}

.challenge-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.challenge-row {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px;
    background-color: #ecf0f1;
    border-radius: 6px;
}

.challenge-name {
    flex: 1;
    font-weight: bold;
}

.challenge-input {
    flex: 2;
    padding: 6px 10px;
    border: 1px solid #ccc;
    border-radius: 4px;
}

.validate-btn {
    flex: 1;
    padding: 6px 12px;
    background-color: #3498db;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

.validate-btn:hover {
    background-color: #2980b9;
}

.status-icon {
    font-size: 1.5rem;
    width: 30px;
    text-align: center;
}

.status-icon.valid {
    color: green;
}

.status-icon.invalid {
    color: red;
}

/* Only style login form with vertical layout */
form.login-form {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

/* Restore horizontal row layout for challenge items */
.challenge-row {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 10px;
    padding: 10px;
    background-color: #ecf0f1;
    border-radius: 6px;
}

input[type="text"],
input[type="password"] {
    padding: 10px 12px;
    border: 1px solid #ccc;
    border-radius: 6px;
    font-size: 1rem;
    width: 100%;
    box-sizing: border-box;
}

input[type="submit"] {
    padding: 10px 16px;
    background-color: #3498db;
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    cursor: pointer;
    align-self: flex-start;
}

input[type="submit"]:hover {
    background-color: #2980b9;
}

/* Error message styling */
.error {
    color: #e74c3c;
    background-color: #fceae9;
    padding: 10px;
    border: 1px solid #e74c3c;
    border-radius: 6px;
}

form.login-form {
    display: flex;
    flex-direction: column;
    gap: 20px;  /* increased spacing */
}

form.login-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-row {
    display: flex;
    align-items: center;
    gap: 10px;
}

.form-row label {
    width: 100px; /* adjust width as needed for alignment */
    font-weight: bold;
}

.form-row input {
    flex: 1;
    padding: 6px 10px;
    border: 1px solid #ccc;
    border-radius: 4px;
}

.result-indicator {
    display: inline-block;
    width: 1.5em;  /* enough space for ✅/❌ */
    text-align: center;
    margin-left: 0.5em;
}

details.week {
    margin-left: 20px;  /* adjust indent as needed */
}