*,
*::before,
*::after {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    background: linear-gradient(145deg, #1a1f36 0%, #252b48 45%, #1e3a5f 100%);
    min-height: 100vh;
    color: #e8ecf4;
    line-height: 1.5;
}

.page {
    max-width: 920px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

.header {
    text-align: center;
    margin-bottom: 24px;
}

.back-link {
    display: inline-block;
    color: #8ba3c7;
    text-decoration: none;
    font-size: 14px;
    margin-bottom: 16px;
}

.back-link:hover {
    color: #b8cce8;
}

.header h1 {
    margin: 0 0 8px;
    font-size: 28px;
    font-weight: 600;
}

.subtitle {
    margin: 0;
    color: #9aa8be;
    font-size: 14px;
}

.card {
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    padding: 20px;
    backdrop-filter: blur(12px);
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.25);
}

.toolbar {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 16px;
}

.btn {
    border: none;
    cursor: pointer;
    font-size: 13px;
    border-radius: 8px;
    padding: 8px 14px;
    transition: background 0.15s, transform 0.1s;
}

.btn:active {
    transform: scale(0.98);
}

.btn-primary {
    background: linear-gradient(135deg, #3d8bfd, #2a6fd6);
    color: #fff;
    font-weight: 600;
}

.btn-primary:hover {
    background: linear-gradient(135deg, #4d97ff, #3578e0);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: #dce4f0;
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.18);
}

.options-row {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 16px;
    font-size: 13px;
    color: #9aa8be;
}

.options-row label {
    display: flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
}

.options-row input[type="checkbox"],
.options-row select {
    accent-color: #3d8bfd;
}

.options-row select {
    padding: 4px 8px;
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 6px;
    background: rgba(0, 0, 0, 0.25);
    color: #fff;
}

.editor-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.editor-panel label {
    display: block;
    font-size: 13px;
    color: #9aa8be;
    margin-bottom: 8px;
}

.editor-panel textarea {
    width: 100%;
    min-height: 360px;
    padding: 14px;
    font-family: "SF Mono", "Consolas", "Monaco", monospace;
    font-size: 13px;
    line-height: 1.55;
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 10px;
    background: rgba(0, 0, 0, 0.25);
    color: #e8ecf4;
    resize: vertical;
    outline: none;
}

.editor-panel textarea:focus {
    border-color: #5b9fd4;
}

.editor-panel textarea.error {
    border-color: #e74c3c;
}

.status {
    margin-top: 12px;
    padding: 10px 14px;
    border-radius: 8px;
    font-size: 13px;
}

.status.ok {
    background: rgba(46, 204, 113, 0.15);
    color: #6ee7a0;
    border: 1px solid rgba(46, 204, 113, 0.3);
}

.status.err {
    background: rgba(231, 76, 60, 0.15);
    color: #f5a8a0;
    border: 1px solid rgba(231, 76, 60, 0.3);
}

.status.hide {
    display: none;
}

.footer {
    text-align: center;
    margin-top: 24px;
    font-size: 12px;
    color: #7a8ba8;
}

.footer a {
    color: #8ba3c7;
}

.toast {
    position: fixed;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%) translateY(80px);
    padding: 10px 20px;
    background: rgba(30, 40, 60, 0.95);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 8px;
    font-size: 14px;
    opacity: 0;
    transition: transform 0.25s, opacity 0.25s;
    pointer-events: none;
    z-index: 100;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

@media (max-width: 768px) {
    .editor-grid {
        grid-template-columns: 1fr;
    }

    .editor-panel textarea {
        min-height: 200px;
    }
}