:root {
    --bg-color: #f8f9fa;
    --text-color: #212529;
    --container-bg: #ffffff;
    --message-bg: #f1f3f5;
    --accent-color: #0d6efd;
    --button-bg: #0d6efd;
    --button-text: white;
    --edit-btn-bg: #ffc107;
    --delete-btn-bg: #dc3545;
}

body.dark {
    --bg-color: #121212;
    --text-color: #e0e0e0;
    --container-bg: #1e1e1e;
    --message-bg: #2a2a2a;
    --accent-color: #66b2ff;
    --button-bg: #66b2ff;
    --button-text: black;
    --edit-btn-bg: #e0a800;
    --delete-btn-bg: #f44336;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
    background: var(--container-bg);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    border-radius: 12px;
    padding: 30px;
    margin: 40px auto;
    max-width: 700px;
    text-align: center;
}

h2, h3 {
    text-align: center;
    color: var(--text-color);
}

.message-box {
    background-color: var(--message-bg);
    border-left: 6px solid var(--accent-color);
    border-radius: 10px;
    padding: 20px;
    margin: 20px 0;
    position: relative;
    text-align: left;
}

.messages {
    text-align: left;
}

.username {
    font-weight: 600;
    color: var(--accent-color);
}

.date {
    font-size: 0.85em;
    color: #6c757d;
    margin-bottom: 10px;
}

.message-text {
    margin: 10px 0;
    font-size: 1em;
    line-height: 1.5;
}

.message-image {
    max-width: 100%;
    height: 200px;
    margin-top: 12px;
    border-radius: 8px;
    border: 1px solid #dee2e6;
}

button {
    transition: background-color 0.3s ease;
    background-color: var(--button-bg);
    color: var(--button-text);
    border: none;
    padding: 8px 14px;
    border-radius: 6px;
    cursor: pointer;
    margin-top: 10px;
    font-weight: 500;
}

#textField {
    width: 90%;
}

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

.edit-btn:hover {
    background-color: #e0a800;
}

.delete-btn {
    background-color: var(--delete-btn-bg);
    color: var(--button-text);
    position: absolute;
    top: 10px;
    right: 10px;
}

.delete-btn:hover {
    background-color: #bd2130;
}

.form-container {
    background-color: var(--message-bg);
    padding: 20px;
    border-radius: 10px;
    margin-bottom: 30px;
}

textarea {
    width: 100%;
    min-height: 100px;
    padding: 10px;
    margin-bottom: 10px;
    border-radius: 8px;
    border: 1px solid #ced4da;
    resize: vertical;
    font-family: inherit;
    font-size: 1em;
}

input[type="file"] {
    margin-top: 10px;
}

button[type="submit"] {
    background-color: #0d6efd;
    color: white;
}

button[type="submit"]:hover {
    background-color: #0b5ed7;
}

.red {
    color: #dc3545;
    font-weight: bold;
}