:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --bg-color: #f8fafc;
    --card-bg: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
}

/* 全局禁用focus状态 */
*:focus {
    outline: none !important;
    box-shadow: none !important;
}

button:focus, 
.btn:focus,
.form-control:focus,
.form-check-input:focus {
    outline: none !important;
    box-shadow: none !important;
}

.btn.focus, 
.btn:focus,
.btn-primary.focus,
.btn-primary:focus,
.btn-light.focus,
.btn-light:focus {
    box-shadow: none !important;
}


.header-icon {
    font-size: 2rem;
    color: var(--primary);
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.app-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
}

.time-inputs {
    display: flex;
    gap: 0.5rem;
    justify-content: center;
}

.time-input-group {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
}

.time-input-group input {
    width: 4rem;
    text-align: center;
    border-radius: 0.375rem;
    border: 1px solid var(--border-color);
    font-size: 1.125rem;
}

.time-input-group label {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.quick-presets {
    display: flex;
    gap: 0.5rem;
    justify-content: center;
    flex-wrap: wrap;
}

.quick-presets .btn {
    font-size: 0.875rem;
    padding: 0.25rem 0.75rem;
}

.countdown-display {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 0;
}

.time-block {
    display: flex;
    flex-direction: column;
    align-items: center;
    min-width: 4rem;
}

.time-value {
    font-size: 2.5rem;
    font-weight: 600;
    font-variant-numeric: tabular-nums;
    line-height: 1;
    color: var(--primary);
}

.time-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
}

.time-separator {
    font-size: 2rem;
    font-weight: 300;
    color: var(--text-secondary);
    margin-top: -0.5rem;
}

.btn {
    font-weight: 500;
    font-size: 0.875rem;
    display: inline-flex;
    align-items: center;
}

.btn-primary {
    background-color: var(--primary);
    border-color: var(--primary);
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    border-color: var(--primary-dark);
}

.btn-light {
    background-color: #f1f5f9;
    border-color: #e2e8f0;
    color: var(--text-secondary);
}

.btn-light:hover {
    background-color: #e2e8f0;
    border-color: #cbd5e1;
}

.btn:disabled {
    opacity: 0.65;
}

.form-check-input:checked {
    background-color: var(--primary);
    border-color: var(--primary);
}

.settings {
    display: flex;
    justify-content: center;
}

/* 动画效果 */
@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

.time-value.ending {
    color: #ef4444;
    animation: pulse 1s infinite;
}