/* Facebook Advertising Course - Stylesheet */
/* Color Scheme: Green, Saffron (Orange), and White */

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

:root {
    --primary-green: #2E7D32;
    --light-green: #4CAF50;
    --dark-green: #1B5E20;
    --saffron: #FF9800;
    --light-saffron: #FFB74D;
    --dark-saffron: #F57C00;
    --white: #FFFFFF;
    --light-gray: #F5F5F5;
    --text-dark: #212121;
    --text-gray: #616161;
    --border-color: #E0E0E0;
    --shadow: rgba(0, 0, 0, 0.1);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background: linear-gradient(135deg, #f5f7fa 0%, #e8f5e9 100%);
    min-height: 100vh;
}

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

/* Header Styles */
header {
    background: linear-gradient(135deg, var(--primary-green) 0%, var(--dark-green) 100%);
    color: var(--white);
    padding: 40px 30px;
    border-radius: 15px;
    box-shadow: 0 5px 20px var(--shadow);
    margin-bottom: 30px;
    text-align: center;
}

header h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
}

.subtitle {
    font-size: 1.2em;
    opacity: 0.95;
    font-weight: 300;
}

/* Navigation Styles */
.navigation {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 15px;
    margin-bottom: 30px;
    background: var(--white);
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 2px 10px var(--shadow);
}

.nav-btn {
    padding: 12px 25px;
    background: var(--white);
    color: var(--primary-green);
    border: 2px solid var(--primary-green);
    border-radius: 25px;
    cursor: pointer;
    font-size: 1em;
    font-weight: 600;
    transition: all 0.3s ease;
}

.nav-btn:hover {
    background: var(--light-green);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--shadow);
}

.nav-btn.active {
    background: linear-gradient(135deg, var(--saffron) 0%, var(--dark-saffron) 100%);
    color: var(--white);
    border-color: var(--saffron);
}

/* Content Section Styles */
.content-section {
    display: none;
    animation: fadeIn 0.5s ease-in;
}

.content-section.active {
    display: block;
}

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

.content-section h2 {
    color: var(--primary-green);
    font-size: 2em;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 3px solid var(--saffron);
}

.intro-text {
    font-size: 1.1em;
    color: var(--text-gray);
    margin-bottom: 25px;
    text-align: center;
}

/* Ad Type Cards */
.ad-type-card {
    background: var(--white);
    padding: 25px;
    margin-bottom: 20px;
    border-radius: 10px;
    box-shadow: 0 3px 15px var(--shadow);
    border-left: 5px solid var(--saffron);
    transition: all 0.3s ease;
}

.ad-type-card:hover {
    transform: translateX(5px);
    box-shadow: 0 5px 20px rgba(255, 152, 0, 0.3);
}

.ad-type-card h3 {
    color: var(--primary-green);
    font-size: 1.5em;
    margin-bottom: 15px;
}

.ad-type-card p {
    margin-bottom: 10px;
    line-height: 1.8;
}

.ad-type-card strong {
    color: var(--dark-green);
    font-weight: 600;
}

.ad-type-card ul {
    margin: 10px 0 10px 30px;
    color: var(--text-gray);
}

.ad-type-card li {
    margin-bottom: 8px;
    line-height: 1.6;
}

/* Metric Cards */
.metric-card {
    background: var(--white);
    padding: 30px;
    margin-bottom: 25px;
    border-radius: 12px;
    box-shadow: 0 4px 15px var(--shadow);
    border-top: 4px solid var(--primary-green);
    transition: all 0.3s ease;
}

.metric-card:hover {
    box-shadow: 0 6px 25px rgba(46, 125, 50, 0.3);
    transform: translateY(-3px);
}

.metric-card h3 {
    color: var(--saffron);
    font-size: 1.6em;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--light-green);
}

.metric-definition p {
    margin-bottom: 12px;
    line-height: 1.8;
}

.formula {
    background: linear-gradient(135deg, var(--light-green) 0%, var(--primary-green) 100%);
    color: var(--white);
    padding: 15px;
    border-radius: 8px;
    margin: 15px 0;
    text-align: center;
    font-size: 1.1em;
    font-weight: 600;
    font-family: 'Courier New', monospace;
    box-shadow: 0 3px 10px var(--shadow);
}

.metric-example {
    background: #FFF3E0;
    padding: 20px;
    border-radius: 8px;
    margin-top: 15px;
    border-left: 4px solid var(--saffron);
}

.metric-example h4 {
    color: var(--dark-saffron);
    margin-bottom: 10px;
}

.metric-example ul {
    margin: 10px 0 10px 25px;
}

.metric-example li {
    margin-bottom: 8px;
    color: var(--text-dark);
    line-height: 1.6;
}

.metric-example p {
    margin: 10px 0;
    line-height: 1.7;
}

.metric-example strong {
    color: var(--dark-green);
}

/* Calculator Section */
.calculator-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    margin-top: 30px;
}

@media (max-width: 968px) {
    .calculator-container {
        grid-template-columns: 1fr;
    }
}

.calculator-card, .results-card {
    background: var(--white);
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 15px var(--shadow);
}

.calculator-card {
    border-top: 4px solid var(--saffron);
}

.results-card {
    border-top: 4px solid var(--primary-green);
}

.calculator-card h3, .results-card h3 {
    color: var(--primary-green);
    font-size: 1.5em;
    margin-bottom: 25px;
    text-align: center;
}

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

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

.input-group input {
    width: 100%;
    padding: 12px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1em;
    transition: all 0.3s ease;
}

.input-group input:focus {
    outline: none;
    border-color: var(--saffron);
    box-shadow: 0 0 0 3px rgba(255, 152, 0, 0.1);
}

.calculate-btn, .reset-btn {
    width: 100%;
    padding: 15px;
    border: none;
    border-radius: 8px;
    font-size: 1.1em;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 10px;
}

.calculate-btn {
    background: linear-gradient(135deg, var(--primary-green) 0%, var(--dark-green) 100%);
    color: var(--white);
}

.calculate-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(46, 125, 50, 0.4);
}

.reset-btn {
    background: linear-gradient(135deg, var(--saffron) 0%, var(--dark-saffron) 100%);
    color: var(--white);
}

.reset-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(255, 152, 0, 0.4);
}

.placeholder-text {
    text-align: center;
    color: var(--text-gray);
    padding: 40px 20px;
    font-style: italic;
}

.result-item {
    background: var(--light-gray);
    padding: 15px;
    margin-bottom: 12px;
    border-radius: 8px;
    border-left: 4px solid var(--saffron);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.result-label {
    font-weight: 600;
    color: var(--text-dark);
}

.result-value {
    font-size: 1.2em;
    font-weight: 700;
    color: var(--primary-green);
}

.result-status {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 15px;
    font-size: 0.85em;
    margin-left: 10px;
    font-weight: 600;
}

.status-excellent {
    background: #C8E6C9;
    color: var(--dark-green);
}

.status-good {
    background: #FFF9C4;
    color: #F57F17;
}

.status-average {
    background: #FFE0B2;
    color: var(--dark-saffron);
}

.status-poor {
    background: #FFCDD2;
    color: #C62828;
}

/* Example Cards */
.example-card {
    background: var(--white);
    padding: 30px;
    margin-bottom: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 15px var(--shadow);
    border: 3px solid var(--light-green);
}

.example-card h3 {
    color: var(--saffron);
    font-size: 1.7em;
    margin-bottom: 20px;
    text-align: center;
}

.example-details p {
    margin-bottom: 10px;
    line-height: 1.8;
}

.example-details strong {
    color: var(--dark-green);
}

.example-data, .example-metrics, .example-analysis {
    margin-top: 20px;
    padding: 20px;
    border-radius: 8px;
}

.example-data {
    background: #E8F5E9;
    border-left: 4px solid var(--primary-green);
}

.example-metrics {
    background: #FFF3E0;
    border-left: 4px solid var(--saffron);
}

.example-analysis {
    background: #F1F8E9;
    border-left: 4px solid var(--light-green);
}

.example-data h4, .example-metrics h4, .example-analysis h4 {
    color: var(--primary-green);
    margin-bottom: 12px;
    font-size: 1.2em;
}

.example-data ul, .example-metrics ul {
    margin: 10px 0 10px 25px;
}

.example-data li, .example-metrics li {
    margin-bottom: 8px;
    line-height: 1.6;
}

.example-analysis p {
    margin: 8px 0;
    line-height: 1.8;
}

/* Comparison Table */
.comparison-table-container {
    margin-top: 40px;
    background: var(--white);
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 15px var(--shadow);
}

.comparison-table-container h3 {
    color: var(--primary-green);
    font-size: 1.6em;
    margin-bottom: 20px;
    text-align: center;
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}

.comparison-table thead {
    background: linear-gradient(135deg, var(--primary-green) 0%, var(--dark-green) 100%);
    color: var(--white);
}

.comparison-table th {
    padding: 15px;
    text-align: left;
    font-weight: 600;
}

.comparison-table td {
    padding: 15px;
    border-bottom: 1px solid var(--border-color);
}

.comparison-table tbody tr:nth-child(even) {
    background: #F1F8E9;
}

.comparison-table tbody tr:hover {
    background: #FFF3E0;
    transition: all 0.3s ease;
}

.comparison-table tbody tr td:first-child {
    font-weight: 600;
    color: var(--primary-green);
}

/* Footer */
footer {
    margin-top: 50px;
    padding: 30px;
    background: linear-gradient(135deg, var(--dark-green) 0%, var(--primary-green) 100%);
    color: var(--white);
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 4px 15px var(--shadow);
}

footer p {
    line-height: 1.8;
    margin-bottom: 10px;
}

.footer-note {
    margin-top: 20px;
    font-size: 0.9em;
    opacity: 0.9;
}

/* Responsive Design */
@media (max-width: 768px) {
    header h1 {
        font-size: 1.8em;
    }

    .subtitle {
        font-size: 1em;
    }

    .navigation {
        flex-direction: column;
    }

    .nav-btn {
        width: 100%;
    }

    .content-section h2 {
        font-size: 1.5em;
    }

    .metric-card, .ad-type-card, .example-card {
        padding: 20px;
    }

    .calculator-container {
        grid-template-columns: 1fr;
    }

    .comparison-table {
        font-size: 0.85em;
    }

    .comparison-table th, .comparison-table td {
        padding: 10px 8px;
    }
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--light-gray);
}

::-webkit-scrollbar-thumb {
    background: var(--primary-green);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--dark-green);
}

/* Print Styles */
@media print {
    body {
        background: white;
    }

    .navigation, .calculate-btn, .reset-btn {
        display: none;
    }

    .content-section {
        display: block !important;
        page-break-before: always;
    }
}