/* ===================================
   Profit Margin Calculator Styles
   =================================== */

/* CSS Variables */
:root {
    --primary-color: #C62E2E;
    --secondary-color: #1e1e1e;
    --accent-color: #C1E172;
    --background-color: #f8f9fa;
    --text-dark: #1e1e1e;
    --text-muted: #6c757d;
    --white: #ffffff;
    --border-radius: 12px;
    --border-radius-sm: 8px;
    --transition: all 0.3s ease;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-hover: 0 4px 16px rgba(0, 0, 0, 0.12);
}

/* Global Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--background-color);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Hero Section */
.hero-section {
    background: linear-gradient(135deg, var(--primary-color) 0%, #a02525 100%);
    color: var(--white);
    padding: 80px 20px 60px;
    text-align: center;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.icon-wrapper {
    display: inline-block;
    margin-bottom: 24px;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

.hero-section h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 16px;
    line-height: 1.2;
}

.hero-description {
    font-size: 1.125rem;
    opacity: 0.95;
    max-width: 700px;
    margin: 0 auto;
}

/* Calculator Section */
.calculator-section {
    padding: 60px 20px;
    margin-top: -40px;
}

.calculator-card {
    background: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    padding: 40px;
    margin-bottom: 40px;
}

.calculator-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

/* Input Section */
.input-section h2,
.results-section h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 24px;
    color: var(--text-dark);
}

.input-group {
    margin-bottom: 24px;
}

.input-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-dark);
    font-size: 0.95rem;
}

.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.input-prefix,
.input-suffix {
    position: absolute;
    font-weight: 600;
    color: var(--text-muted);
    pointer-events: none;
}

.input-prefix {
    left: 16px;
}

.input-suffix {
    right: 16px;
}

.input-group input {
    width: 100%;
    padding: 14px 16px;
    padding-left: 36px;
    border: 2px solid #e0e0e0;
    border-radius: var(--border-radius-sm);
    font-size: 1rem;
    transition: var(--transition);
    font-family: inherit;
}

.input-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(198, 46, 46, 0.1);
}

.input-hint {
    display: block;
    margin-top: 6px;
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* Buttons */
.button-group {
    display: flex;
    gap: 12px;
    margin-top: 32px;
}

.btn {
    padding: 14px 32px;
    border: none;
    border-radius: var(--border-radius-sm);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--white);
    flex: 1;
}

.btn-primary:hover {
    background-color: #a02525;
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.btn-secondary {
    background-color: var(--background-color);
    color: var(--text-dark);
    border: 2px solid #e0e0e0;
}

.btn-secondary:hover {
    background-color: #e0e0e0;
    transform: translateY(-2px);
}

.btn-large {
    padding: 16px 40px;
    font-size: 1rem;
}

/* Results Section */
.results-section {
    opacity: 0;
    transform: translateY(20px);
    transition: var(--transition);
}

.results-section.active {
    opacity: 1;
    transform: translateY(0);
}

.primary-result {
    background: linear-gradient(135deg, var(--primary-color) 0%, #a02525 100%);
    color: var(--white);
    padding: 24px;
    border-radius: var(--border-radius);
    text-align: center;
    margin-bottom: 24px;
}

.result-label {
    font-size: 0.875rem;
    opacity: 0.9;
    margin-bottom: 8px;
    font-weight: 500;
}

.primary-result .result-value {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.result-status {
    font-size: 0.95rem;
    font-weight: 600;
    padding: 8px 16px;
    border-radius: 20px;
    display: inline-block;
    margin-top: 8px;
}

.status-success {
    background-color: rgba(193, 225, 114, 0.3);
    color: var(--accent-color);
}

.status-warning {
    background-color: rgba(255, 193, 7, 0.3);
    color: #f5a623;
}

.status-danger {
    background-color: rgba(255, 255, 255, 0.2);
    color: var(--white);
}

.results-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    margin-bottom: 24px;
}

.result-card {
    background: var(--background-color);
    padding: 20px;
    border-radius: var(--border-radius-sm);
    text-align: center;
    transition: var(--transition);
}

.result-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.result-icon {
    font-size: 2rem;
    margin-bottom: 8px;
}

.result-card .result-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

/* Insights Card */
.insights-card {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    padding: 24px;
    border-radius: var(--border-radius);
    margin-top: 24px;
}

.insights-card h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-dark);
}

.insight-item {
    padding: 12px 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    display: flex;
    align-items: flex-start;
    gap: 12px;
}

.insight-item:last-child {
    border-bottom: none;
}

.insight-icon {
    font-size: 1.25rem;
    flex-shrink: 0;
}

.insight-text {
    font-size: 0.95rem;
    line-height: 1.5;
}

/* Quick Reference */
.quick-reference {
    background: var(--white);
    padding: 32px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    margin-bottom: 40px;
}

.quick-reference h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 20px;
    text-align: center;
}

.reference-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}

.reference-item {
    background: var(--background-color);
    padding: 16px;
    border-radius: var(--border-radius-sm);
    text-align: center;
    font-size: 0.95rem;
    border: 2px solid transparent;
    transition: var(--transition);
}

.reference-item:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
}

.reference-item strong {
    color: var(--primary-color);
    display: block;
    margin-bottom: 4px;
}

/* Features Section */
.features-section {
    padding: 80px 20px;
    background: var(--white);
}

.section-title {
    font-size: 2rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 48px;
    color: var(--text-dark);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.feature-card {
    text-align: center;
    padding: 32px 24px;
    border-radius: var(--border-radius);
    background: var(--background-color);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 16px;
    display: inline-block;
}

.feature-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.feature-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* How To Section */
.how-to-section {
    padding: 80px 20px;
    background: var(--background-color);
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}

.step-card {
    background: var(--white);
    padding: 32px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
    position: relative;
}

.step-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
}

.step-number {
    position: absolute;
    top: -16px;
    left: 32px;
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary-color) 0%, #a02525 100%);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    font-weight: 700;
}

.step-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 12px;
    margin-top: 16px;
}

.step-card p {
    color: var(--text-muted);
    line-height: 1.6;
}

/* CTA Section */
.cta-section {
    padding: 80px 20px;
    background: linear-gradient(135deg, var(--secondary-color) 0%, #000000 100%);
    color: var(--white);
}

.cta-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.cta-content h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 20px;
}

.cta-content p {
    font-size: 1.125rem;
    margin-bottom: 32px;
    opacity: 0.9;
}

.cta-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-bottom: 32px;
}

.cta-features {
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
    justify-content: center;
    opacity: 0.8;
}

.cta-feature {
    font-size: 0.95rem;
}

/* Content Section */
.content-section {
    padding: 80px 20px;
    background: var(--white);
}

.content-article {
    max-width: 800px;
    margin: 0 auto;
}

.content-article h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 24px;
    color: var(--text-dark);
}

.content-article h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-top: 40px;
    margin-bottom: 16px;
    color: var(--text-dark);
}

.content-article p {
    margin-bottom: 20px;
    line-height: 1.8;
    color: var(--text-muted);
}

/* FAQ Section */
.faq-section {
    padding: 80px 20px;
    background: var(--background-color);
}

.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: var(--white);
    border-radius: var(--border-radius-sm);
    margin-bottom: 16px;
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: var(--transition);
}

.faq-question {
    width: 100%;
    padding: 20px 24px;
    background: none;
    border: none;
    text-align: left;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-dark);
    font-family: inherit;
    transition: var(--transition);
}

.faq-question:hover {
    color: var(--primary-color);
}

.faq-icon {
    font-size: 1.5rem;
    color: var(--primary-color);
    transition: var(--transition);
    flex-shrink: 0;
    margin-left: 16px;
}

.faq-item.active .faq-icon {
    transform: rotate(45deg);
}

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

.faq-item.active .faq-answer {
    max-height: 500px;
}

.faq-answer p {
    padding: 0 24px 20px;
    color: var(--text-muted);
    line-height: 1.7;
}

/* Responsive Design */
@media (max-width: 992px) {
    .calculator-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .reference-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .hero-section h1 {
        font-size: 2rem;
    }

    .hero-description {
        font-size: 1rem;
    }

    .calculator-card {
        padding: 24px;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .steps-grid {
        grid-template-columns: 1fr;
    }

    .results-grid {
        grid-template-columns: 1fr;
    }

    .reference-grid {
        grid-template-columns: 1fr;
    }

    .button-group {
        flex-direction: column;
    }

    .cta-buttons {
        flex-direction: column;
    }

    .btn-large {
        width: 100%;
    }

    .primary-result .result-value {
        font-size: 2.5rem;
    }

    .section-title {
        font-size: 1.75rem;
    }

    .content-article h2 {
        font-size: 1.75rem;
    }

    .content-article h3 {
        font-size: 1.25rem;
    }
}

@media (max-width: 480px) {
    .hero-section {
        padding: 60px 20px 40px;
    }

    .calculator-section {
        padding: 40px 20px;
    }

    .features-section,
    .how-to-section,
    .cta-section,
    .content-section,
    .faq-section {
        padding: 60px 20px;
    }

    .hero-section h1 {
        font-size: 1.75rem;
    }
}

/* Utility Classes */
.text-center {
    text-align: center;
}

.mt-4 {
    margin-top: 24px;
}

.mb-4 {
    margin-bottom: 24px;
}

/* Animation */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.5s ease forwards;
}

/* Print Styles */
@media print {
    .hero-section,
    .features-section,
    .how-to-section,
    .cta-section,
    .faq-section,
    #site-header,
    #site-footer {
        display: none;
    }

    .calculator-section {
        margin-top: 0;
    }

    .calculator-card {
        box-shadow: none;
        border: 1px solid #ddd;
    }
}