.tool-fullwidth {
    width: 100%;
    max-width: 100%;
    margin: 0;
    padding: 0;
}

/* Tool shell */
.game-tool {
    max-width: 100%;
    margin: 0 auto;
}

.game-tool.editor-section,
.editor-section.game-tool {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.game-tool .card {
    border: 1px solid var(--color-border, #e5e7eb);
    box-shadow: var(--shadow-sm, 0 1px 3px rgba(0, 0, 0, 0.06));
    border-radius: var(--radius, 12px);
    background: var(--color-surface, #fff);
}

.game-tool .card-body {
    padding: 1.25rem 1.35rem;
}

.game-tool .card-title {
    color: var(--color-text, #1f2937);
    font-weight: 700;
    font-size: 1.05rem;
}

.game-tool .form-control,
.game-tool .form-select,
.game-tool .select-input,
.game-tool textarea {
    border-radius: 8px;
    border: 1px solid var(--color-border, #e5e7eb);
}

.game-tool .form-control:focus,
.game-tool .form-select:focus,
.game-tool textarea:focus {
    border-color: var(--color-primary, #0d9488);
    box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.15);
}

.game-tool .btn-primary {
    background: var(--color-primary, #0d9488);
    border-color: var(--color-primary, #0d9488);
}

.game-tool .btn-primary:hover {
    background: var(--color-primary-hover, #0f766e);
    border-color: var(--color-primary-hover, #0f766e);
}

.game-tool .alert {
    border-radius: 10px;
}

[data-theme="dark"] .game-tool .card {
    background: var(--color-surface, #1f2937);
    border-color: var(--color-border, #374151);
}

[data-theme="dark"] .game-tool .card-title,
[data-theme="dark"] .game-tool .form-label,
[data-theme="dark"] .game-tool {
    color: var(--color-text, #f9fafb);
}

[data-theme="dark"] .game-tool .text-muted,
[data-theme="dark"] .game-tool .form-text {
    color: var(--color-text-secondary, #9ca3af) !important;
}

[data-theme="dark"] .game-tool .form-control,
[data-theme="dark"] .game-tool .form-select,
[data-theme="dark"] .game-tool textarea {
    background: #111827;
    color: var(--color-text, #f9fafb);
    border-color: var(--color-border, #374151);
}

/* --- tool: reaction-speed --- */
/* 反应速度测试 - 页面内样式，方便后续修改 */
.reaction-speed-tool .rs-area {
  width: 260px;
  height: 260px;
  background: #ffffff;
  border: 2px solid var(--bs-border-color,#dee2e6);
  border-radius: 8px;
  transition: background-color 80ms ease, border-color .2s ease;
  margin: 0 auto;
}
.reaction-speed-tool .rs-area.rs-go { border-color: transparent; }
.reaction-speed-tool .rs-area.rs-early { border-color: #dc3545; }
.reaction-speed-tool .hint { user-select: none; }
.reaction-speed-tool .stats .card { border: 1px solid var(--bs-border-color,#dee2e6); }
.reaction-speed-tool .stats .stat-label { color: var(--bs-secondary-color,#6c757d); }
.reaction-speed-tool .stats .stat-value { font-size: 1.5rem; font-weight: 700; }