:root {
    --bg-color: #0b0f19;
    --card-bg: #151d2a;
    --accent-color: #38bdf8;
    --accent-hover: #0284c7;
    --text-main: #f8fafc;
    --text-sub: #94a3b8;
    --border-color: #1e293b;
    --danger-color: #ef4444;
    --success-color: #10b981;
}

* {
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    margin: 0;
    padding: 20px 10px;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    min-height: 100vh;
}

/* 強制單欄垂直居中佈局 */
.container { 
    max-width: 650px; 
    width: 100%; 
    margin: 0 auto;
    display: flex;
    flex-direction: column;
}

.lang-switch { text-align: right; margin-bottom: 10px; }
.lang-btn {
    background: transparent; border: 1px solid var(--border-color); color: var(--text-sub);
    padding: 4px 10px; border-radius: 6px; cursor: pointer; font-size: 0.85rem; width: auto;
}
.lang-btn.active { border-color: var(--accent-color); color: var(--accent-color); font-weight: bold; }

header { text-align: center; margin-bottom: 25px; position: relative; }
h1 { margin: 0; font-size: 1.8rem; letter-spacing: -0.5px; }
.slogan { color: var(--text-sub); font-size: 0.95rem; margin-top: 8px; font-weight: 500; }

.status-bar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 15px; }
.status-text { color: var(--success-color); font-weight: bold; font-size: 0.9rem; }
.lock-btn { background: transparent; border: 1px solid var(--danger-color); color: var(--danger-color); padding: 4px 12px; border-radius: 6px; cursor: pointer; font-size: 0.85rem; width: auto; }
.lock-btn:hover { background: var(--danger-color); color: #fff; }

.card { background: var(--card-bg); padding: 24px; border-radius: 12px; border: 1px solid var(--border-color); margin-bottom: 20px; box-shadow: 0 4px 20px rgba(0,0,0,0.3); transition: background 0.3s ease; }
.notice-card { border-left: 4px solid var(--accent-color); background: rgba(56, 189, 248, 0.05); }

input, button { width: 100%; padding: 12px; margin: 8px 0; border-radius: 8px; border: 1px solid var(--border-color); background: #0b0f19; color: #fff; font-size: 0.95rem; }
input:focus { outline: none; border-color: var(--accent-color); }

.file-upload-wrapper { position: relative; margin: 8px 0; }
.file-upload-wrapper input[type="file"] { display: none; }
.file-upload-label { display: block; width: 100%; padding: 12px; border-radius: 8px; border: 1px dashed var(--border-color); background: #0b0f19; color: var(--text-sub); font-size: 0.95rem; text-align: center; cursor: pointer; transition: border-color 0.2s, color 0.2s; }
.file-upload-label:hover { border-color: var(--accent-color); color: var(--text-main); }

button.primary-btn { background: var(--accent-color); color: #0b0f19; font-weight: 600; cursor: pointer; border: none; transition: background 0.2s; }
button.primary-btn:hover { background: var(--accent-hover); color: #fff; }
button.secondary-btn { background: transparent; border: 1px solid var(--accent-color); color: var(--accent-color); font-weight: 600; cursor: pointer; transition: 0.2s; }
button.secondary-btn:hover { background: var(--accent-color); color: #0b0f19; }
button.danger-btn { background: transparent; border: 1px solid var(--danger-color); color: var(--danger-color); font-weight: 600; cursor: pointer; transition: 0.2s; }
button.danger-btn:hover { background: var(--danger-color); color: #fff; }

details.reset-details { margin-top: 15px; padding-top: 10px; border-top: 1px dashed var(--border-color); }
details.reset-details summary { color: var(--text-sub); font-size: 0.85rem; cursor: pointer; text-align: center; user-select: none; }
details.reset-details summary:hover { color: var(--danger-color); }
.reset-box { background: rgba(239, 68, 68, 0.05); border: 1px solid rgba(239, 68, 68, 0.2); padding: 12px; border-radius: 8px; margin-top: 10px; }
.reset-notice { color: var(--danger-color); font-size: 0.8rem; margin: 0 0 8px 0; line-height: 1.4; }

.flex-row { display: flex; gap: 10px; }
.item { border-bottom: 1px solid var(--border-color); padding: 15px 0; display: flex; flex-direction: column; gap: 8px; }
.item:last-child { border-bottom: none; }
.item-header { display: flex; justify-content: space-between; align-items: center; }
.item-actions button { width: auto; padding: 4px 10px; margin: 0; font-size: 0.8rem; border-radius: 4px; border: 1px solid var(--border-color); background: #0b0f19; color: var(--text-main); cursor: pointer; }
.item-actions button:hover { border-color: var(--accent-color); color: var(--accent-color); }
.btn-danger:hover { border-color: var(--danger-color) !important; color: var(--danger-color) !important; }

.notice-text { color: var(--text-sub); font-size: 0.85em; text-align: center; }
ul.notice-list { padding-left: 20px; font-size: 0.85rem; color: var(--text-sub); margin: 8px 0 0 0; line-height: 1.5; }
ul.notice-list li { margin-bottom: 6px; }

#toast { position: fixed; bottom: -50px; left: 50%; transform: translateX(-50%); background: var(--accent-color); color: #0b0f19; padding: 10px 20px; border-radius: 8px; font-weight: bold; font-size: 0.9rem; transition: bottom 0.3s ease; z-index: 1000; box-shadow: 0 4px 12px rgba(0,0,0,0.5); }
#toast.show { bottom: 20px; }