/* ===================================
   KPI Calculator Page - Styles
   =================================== */

/* Screen Reader Only */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* Hero Section */
.kpi-hero {
    text-align: center;
    padding: var(--spacing-3xl) 0;
}

/* KPI Section */
.kpi-section {
    margin-bottom: var(--spacing-3xl);
    animation: fadeInUp 0.6s ease 0.2s both;
}

.kpi-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    list-style: none;
    padding: 0;
    margin: 0;
}

.kpi-grid li {
    list-style: none;
}

/* KPI Card */
.kpi-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-2xl);
    overflow: hidden;
    transition: var(--transition-fast);
    animation: fadeInUp 0.6s ease both;
}

.kpi-grid li:nth-child(1) .kpi-card { animation-delay: 0.1s; }
.kpi-grid li:nth-child(2) .kpi-card { animation-delay: 0.2s; }
.kpi-grid li:nth-child(3) .kpi-card { animation-delay: 0.3s; }

.kpi-card:hover {
    border-color: var(--color-border-light);
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl), var(--shadow-glow);
}

.kpi-card-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-xl);
    background: var(--gradient-surface);
    border-bottom: 1px solid var(--color-border);
}

.kpi-card-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: var(--radius-lg);
    font-size: 1.5rem;
    color: white;
    flex-shrink: 0;
}

.kpi-card-info {
    flex: 1;
}

.kpi-card-title {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.kpi-card-subtitle {
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
}

.kpi-card-content {
    padding: var(--spacing-xl);
}

/* Formula */
.kpi-formula {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md);
    background: var(--color-bg-secondary);
    border-radius: var(--radius-lg);
}

.formula-label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.formula-code {
    font-family: 'Courier New', monospace;
    font-size: 0.875rem;
    color: var(--color-primary-light);
    background: transparent;
    padding: 0;
}

/* Inputs */
.kpi-inputs {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.input-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-secondary);
}

.input-label i {
    font-size: 1rem;
    color: var(--color-primary-light);
}

.kpi-input {
    width: 100%;
    padding: var(--spacing-md);
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    font-family: inherit;
    font-size: 1rem;
    color: var(--color-text);
    transition: var(--transition-fast);
}

.kpi-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.kpi-input::placeholder {
    color: var(--color-text-muted);
}

/* Result */
.kpi-result {
    padding: var(--spacing-lg);
    background: var(--gradient-primary);
    border-radius: var(--radius-xl);
    text-align: center;
    margin-bottom: var(--spacing-md);
}

.result-label {
    font-size: 0.875rem;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--spacing-xs);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.result-value {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: var(--spacing-xs);
}

.result-number {
    font-size: 2rem;
    font-weight: 800;
    color: white;
    line-height: 1;
}

.result-unit {
    font-size: 1.125rem;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.9);
}

/* Interpretation */
.kpi-interpretation {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-bg-secondary);
    border-radius: var(--radius-md);
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
    line-height: 1.5;
}

.kpi-interpretation i {
    font-size: 1rem;
    color: var(--color-primary-light);
    flex-shrink: 0;
}

.kpi-interpretation.good {
    background: rgba(16, 185, 129, 0.1);
    color: var(--color-success);
}

.kpi-interpretation.good i {
    color: var(--color-success);
}

.kpi-interpretation.warning {
    background: rgba(245, 158, 11, 0.1);
    color: var(--color-warning);
}

.kpi-interpretation.warning i {
    color: var(--color-warning);
}

.kpi-interpretation.danger {
    background: rgba(239, 68, 68, 0.1);
    color: var(--color-error);
}

.kpi-interpretation.danger i {
    color: var(--color-error);
}

/* Info Section */
.kpi-info-section {
    margin-bottom: var(--spacing-3xl);
    animation: fadeInUp 0.6s ease 0.4s both;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    list-style: none;
    padding: 0;
    margin: 0;
}

.info-grid li {
    list-style: none;
}

.info-card {
    padding: var(--spacing-xl);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    transition: var(--transition-fast);
}

.info-card:hover {
    border-color: var(--color-border-light);
    transform: translateY(-4px);
}

.info-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-lg);
    background: rgba(99, 102, 241, 0.1);
    border-radius: var(--radius-lg);
    font-size: 1.5rem;
    color: var(--color-primary-light);
}

.info-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.info-desc {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-lg);
}

.info-benchmark {
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
}

.info-benchmark strong {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
}

.info-benchmark ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.info-benchmark li {
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
    padding-left: var(--spacing-md);
    position: relative;
}

.info-benchmark li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--color-primary-light);
    font-weight: bold;
}

/* Responsive */
@media (max-width: 1200px) {
    .kpi-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .info-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .kpi-grid {
        grid-template-columns: 1fr;
    }
    
    .info-grid {
        grid-template-columns: 1fr;
    }
    
    .kpi-card-header {
        flex-direction: column;
        text-align: center;
    }
    
    .kpi-card-icon {
        margin: 0 auto;
    }
    
    .result-number {
        font-size: 1.5rem;
    }
}