/* sleep-calculator.css */
.sleep-calculator-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
}

.calculator-card {
    background: white;
    border-radius: 16px;
    padding: 30px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    margin: 30px 0;
}

.mode-selector {
    display: flex;
    gap: 15px;
    margin-bottom: 25px;
    background: #f8fafc;
    padding: 15px;
    border-radius: 12px;
}

.mode-option {
    flex: 1;
    text-align: center;
    padding: 12px;
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.mode-option input {
    display: none;
}

.mode-option span {
    font-weight: 500;
    color: #64748b;
}

.mode-option input:checked + span {
    color: var(--primary, #3b82f6);
}

.mode-option input:checked {
    background: var(--primary, #3b82f6);
    border-color: var(--primary, #3b82f6);
}

.input-group {
    margin-bottom: 20px;
}

.input-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--dark, #1e293b);
}

.time-input, .number-input {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    font-size: 16px;
    transition: border-color 0.3s ease;
}

.time-input:focus, .number-input:focus {
    outline: none;
    border-color: var(--primary, #3b82f6);
}

.advanced-options {
    margin: 20px 0;
}

.advanced-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 0;
    cursor: pointer;
    color: var(--primary, #3b82f6);
    font-weight: 500;
}

.advanced-toggle svg {
    transition: transform 0.3s ease;
}

.advanced-toggle.active svg {
    transform: rotate(180deg);
}

.advanced-content {
    padding-top: 15px;
    border-top: 1px solid #e2e8f0;
}

.input-info {
    font-size: 0.875rem;
    color: #64748b;
    margin-top: 5px;
}

.calculate-btn {
    width: 100%;
    padding: 15px;
    background: var(--primary, #3b82f6);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: background-color 0.3s ease;
}

.calculate-btn:hover {
    background: var(--primary-dark, #2563eb);
}

.results-container {
    margin-top: 30px;
    padding-top: 25px;
    border-top: 1px solid #e2e8f0;
}

.results-container h3 {
    color: var(--dark, #1e293b);
    margin-bottom: 20px;
    font-size: 1.25rem;
}

.results-grid {
    display: grid;
    gap: 12px;
    margin-bottom: 20px;
}

.result-item {
    padding: 15px;
    border-radius: 8px;
    border-left: 4px solid;
    background: #f8fafc;
}

.result-item.excellent {
    border-left-color: #10b981;
    background: #f0fdf4;
}

.result-item.good {
    border-left-color: #3b82f6;
    background: #f0f9ff;
}

.result-item.fair {
    border-left-color: #f59e0b;
    background: #fffbeb;
}

.result-item.minimum {
    border-left-color: #ef4444;
    background: #fef2f2;
}

.result-time {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--dark, #1e293b);
    margin-bottom: 5px;
}

.result-details {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: #64748b;
    font-size: 0.875rem;
}

.result-quality {
    font-weight: 600;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.75rem;
}

.results-note {
    background: #f0f9ff;
    padding: 15px;
    border-radius: 8px;
    border-left: 4px solid #3b82f6;
}

.results-note p {
    margin: 0;
    color: #0369a1;
    font-size: 0.875rem;
}

.sleep-cycle-visual {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
    margin: 25px 0;
}

.cycle-stage {
    padding: 15px 10px;
    border-radius: 8px;
    text-align: center;
}

.stage-label {
    font-weight: 700;
    font-size: 1.125rem;
    margin-bottom: 5px;
}

.stage-name {
    font-weight: 600;
    font-size: 0.875rem;
    margin-bottom: 3px;
}

.stage-desc {
    font-size: 0.75rem;
    color: #64748b;
}

.faq-section {
    margin-top: 20px;
}

.faq-item {
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    margin-bottom: 10px;
    overflow: hidden;
}

.faq-question {
    padding: 15px 20px;
    background: #f8fafc;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
}

.faq-question svg {
    transition: transform 0.3s ease;
}

.faq-question.active svg {
    transform: rotate(180deg);
}

.faq-answer {
    padding: 0 20px;
    max-height: 0;
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-answer.active {
    padding: 15px 20px;
    max-height: 500px;
}

.faq-answer p {
    margin: 0;
    color: #64748b;
    line-height: 1.6;
}

@media (max-width: 768px) {
    .sleep-calculator-container {
        padding: 15px;
    }
    
    .calculator-card {
        padding: 20px;
    }
    
    .mode-selector {
        flex-direction: column;
        gap: 10px;
    }
    
    .sleep-cycle-visual {
        grid-template-columns: repeat(2, 1fr);
        gap: 8px;
    }
    
    .result-details {
        flex-direction: column;
        align-items: flex-start;
        gap: 5px;
    }
}