:root {
    --mc-bg: #4a4a4a;
    --mc-panel-bg: #c6c6c6;
    --mc-border-light: #ffffff;
    --mc-border-dark: #555555;
    --mc-border-darker: #373737;
    --mc-btn-hover: #7b7bb2;
    --mc-text: #333333;
    --mc-gold: #FFAA00;
    --mc-green: #55FF55;
    --mc-red: #FF5555;
}

@font-face {
    font-family: 'Minecraftia';
    /* Fallback to web font if local is not available */
    src: local('Minecraftia'), url('https://fonts.cdnfonts.com/s/72225/Minecraftia-Regular.woff') format('woff');
}

body {
    background-color: var(--mc-bg);
    /* Dirty dirt block background pattern approximation */
    background-image: url('data:image/svg+xml;utf8,<svg width="64" height="64" xmlns="http://www.w3.org/2000/svg"><rect width="32" height="32" fill="%23755b40"/><rect x="32" width="32" height="32" fill="%23866849"/><rect y="32" width="32" height="32" fill="%23866849"/><rect x="32" y="32" width="32" height="32" fill="%23755b40"/></svg>');
    color: var(--mc-text);
    font-family: 'Microsoft YaHei', 'PingFang SC', sans-serif;
    margin: 0;
    padding: 20px;
    display: flex;
    justify-content: center;
    min-height: 100vh;
}

h1, h2, h3, .mc-btn, .nav-btn, .nickname-display {
    font-family: 'Minecraftia', 'Press Start 2P', monospace;
    text-shadow: 2px 2px 0px rgba(0,0,0,0.3);
}

.mc-color-gold {
    color: var(--mc-gold);
}

.container {
    width: 100%;
    max-width: 800px;
}

header {
    text-align: center;
    margin-bottom: 30px;
    color: white;
}

nav {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-top: 20px;
}

.panel {
    background-color: var(--mc-panel-bg);
    border: 4px solid;
    border-color: var(--mc-border-light) var(--mc-border-dark) var(--mc-border-dark) var(--mc-border-light);
    padding: 30px;
    box-shadow: 0 10px 20px rgba(0,0,0,0.5);
    image-rendering: pixelated;
}

h2 {
    text-align: center;
    margin-top: 0;
    border-bottom: 2px solid var(--mc-border-dark);
    padding-bottom: 15px;
}

.form-group {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: bold;
}

input[type="text"], textarea {
    width: 100%;
    padding: 10px;
    background-color: #1e1e1e;
    color: #ffffff;
    border: 3px solid;
    border-color: var(--mc-border-darker) var(--mc-border-light) var(--mc-border-light) var(--mc-border-darker);
    font-family: 'Microsoft YaHei', 'PingFang SC', sans-serif;
    font-size: 16px;
    box-sizing: border-box;
    resize: vertical;
}

input[type="text"]:focus, textarea:focus {
    outline: 2px solid white;
}

.mc-btn, .nav-btn {
    display: inline-block;
    background-color: var(--mc-panel-bg);
    color: var(--mc-text);
    padding: 10px 20px;
    text-decoration: none;
    border: 4px solid;
    border-color: var(--mc-border-light) var(--mc-border-dark) var(--mc-border-dark) var(--mc-border-light);
    cursor: pointer;
    font-size: 16px;
    text-align: center;
    transition: background-color 0.1s;
    width: 100%;
    box-sizing: border-box;
}

.nav-btn {
    width: auto;
    font-size: 14px;
}

.mc-btn:hover, .nav-btn:hover {
    background-color: var(--mc-btn-hover);
    color: white;
}

.mc-btn:active, .nav-btn:active {
    border-color: var(--mc-border-dark) var(--mc-border-light) var(--mc-border-light) var(--mc-border-dark);
    background-color: var(--mc-btn-hover);
}

.nav-btn.active {
    background-color: #5b5b5b;
    color: white;
    border-color: var(--mc-border-dark) var(--mc-border-light) var(--mc-border-light) var(--mc-border-dark);
}

.message {
    margin-top: 20px;
    padding: 15px;
    text-align: center;
    font-weight: bold;
    border: 2px solid;
}

.message.success {
    background-color: #d4edda;
    color: #155724;
    border-color: #c3e6cb;
}

.message.error {
    background-color: #f8d7da;
    color: #721c24;
    border-color: #f5c6cb;
}

.hidden {
    display: none;
}

/* Feedback List Styles */
.feedback-card {
    background-color: #dedede;
    border: 2px solid;
    border-color: var(--mc-border-light) var(--mc-border-dark) var(--mc-border-dark) var(--mc-border-light);
    padding: 15px;
    margin-bottom: 20px;
}

.feedback-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 2px dashed #999;
    padding-bottom: 10px;
    margin-bottom: 10px;
}

.nickname-display {
    font-size: 1.2em;
    color: #1a5c1a;
}

.time-display {
    font-size: 0.8em;
    color: #666;
}

.feedback-section {
    margin-bottom: 10px;
}

.feedback-section h3 {
    margin: 0 0 5px 0;
    font-size: 1em;
    font-family: 'Microsoft YaHei', sans-serif;
    text-shadow: none;
}

.add-title {
    color: #006600;
}

.remove-title {
    color: #cc0000;
}

.content-box {
    background-color: #f0f0f0;
    padding: 10px;
    border: 1px inset #aaa;
    min-height: 40px;
    white-space: pre-wrap;
    word-break: break-all;
}

.empty-msg {
    color: #888;
    font-style: italic;
}

.loading {
    text-align: center;
    font-size: 1.2em;
    font-family: 'Minecraftia', monospace;
    padding: 20px;
}