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

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

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

.query-tool .card:not(.result-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);
}

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

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

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

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

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

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

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

[data-theme="dark"] .query-tool .card:not(.result-card) {
    background: var(--color-surface, #1f2937);
    border-color: var(--color-border, #374151);
}

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

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

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

/* --- tool: what-day-is-it-today --- */
/* 星期几计算器样式 */
.tool-weekday-calculator {
    max-width: 1000px;
    margin: 0 auto;
}

.current-date-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.3);
}

.current-date-card .card-body {
    padding: 2rem;
}

.today-display {
    font-size: 3rem;
    font-weight: bold;
    margin-bottom: 0.5rem;
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.date-info {
    font-size: 1.2rem;
    opacity: 0.9;
}

.calculator-card {
    border: none;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    border-radius: 15px;
}

.date-input-group {
    background: #f8f9fa;
    border-radius: 10px;
    padding: 1.5rem;
    margin-bottom: 1rem;
}

.result-card {
    background: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
    color: white;
    border: none;
    box-shadow: 0 10px 30px rgba(17, 153, 142, 0.3);
    border-radius: 15px;
}

.result-value {
    font-size: 2.5rem;
    font-weight: bold;
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.result-label {
    font-size: 1rem;
    opacity: 0.9;
    margin-bottom: 0.5rem;
}

.weekday-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.8;
}

.history-card {
    border: none;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    border-radius: 15px;
}

.history-item {
    background: #f8f9fa;
    border-radius: 10px;
    padding: 1rem;
    margin-bottom: 0.5rem;
    border-left: 4px solid #667eea;
}

.btn-calculate {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: none;
    border-radius: 25px;
    padding: 0.75rem 2rem;
    font-weight: bold;
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.3);
    transition: all 0.3s ease;
}

.btn-calculate:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
}

.btn-reset {
    border-radius: 25px;
    padding: 0.75rem 2rem;
}

.form-control {
    border-radius: 10px;
    border: 2px solid #e9ecef;
    transition: all 0.3s ease;
}

.form-control:focus {
    border-color: #667eea;
    box-shadow: 0 0 0 0.2rem rgba(102, 126, 234, 0.25);
}

.form-label {
    font-weight: 600;
    color: #495057;
}

@media (max-width: 768px) {
    .today-display {
        font-size: 2rem;
    }
    
    .result-value {
        font-size: 2rem;
    }
    
    .weekday-icon {
        font-size: 2rem;
    }
}