/* Newsletter & Substack Revenue Calculator 2026 - Stylesheet */

/* --- VARIABLES --- */
:root {
    --brand: #f59e0b;
    --brand-dark: #d97706;
    --brand-light: #fef3c7;
    --dark: #1f2937;
    --gray: #6b7280;
    --gray-dark: #374151;
    --gray-light: #f3f4f6;
    --white: #ffffff;
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 15px rgba(0,0,0,0.1), 0 4px 6px rgba(0,0,0,0.05);
    --stream-sub: #3b82f6;
    --stream-sponsor: #22c55e;
    --stream-referral: #8b5cf6;
}

/* --- RESET & BASE --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--dark);
    background: var(--gray-light);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}
a { color: var(--brand); text-decoration: none; }
a:hover { color: var(--brand-dark); }
.container { max-width: 1200px; margin: 0 auto; padding: 0 var(--spacing-lg); }

/* --- NAVBAR --- */
.navbar {
    background: var(--dark);
    padding: var(--spacing-md) 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-md);
}
.navbar .container { display: flex; align-items: center; justify-content: space-between; }
.logo {
    color: var(--white);
    font-weight: 700;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}
.logo:hover { color: var(--brand); }
.logo i { color: var(--brand); }
.nav-links { display: flex; gap: var(--spacing-md); align-items: center; }
.nav-links a { color: #d1d5db; font-size: 0.9rem; font-weight: 500; transition: color 0.2s; }
.nav-links a:hover { color: var(--brand); }
.hamburger {
    display: none;
    background: none;
    border: none;
    color: var(--white);
    font-size: 1.3rem;
    cursor: pointer;
}

/* --- HERO --- */
.hero {
    background: linear-gradient(135deg, var(--dark) 0%, #374151 100%);
    padding: var(--spacing-2xl) 0;
    text-align: center;
    color: var(--white);
}
.hero h1 {
    font-family: 'Poppins', sans-serif;
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    background: linear-gradient(135deg, var(--brand) 0%, #fbbf24 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero .subtitle {
    color: #d1d5db;
    font-size: 1.05rem;
    max-width: 700px;
    margin: 0 auto var(--spacing-xl);
}
.hero-stats { display: flex; justify-content: center; gap: var(--spacing-xl); flex-wrap: wrap; }
.hero-stats .stat { text-align: center; }
.hero-stats .stat-number {
    font-family: 'Poppins', sans-serif;
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--brand);
}
.hero-stats .stat-label { font-size: 0.85rem; color: #9ca3af; margin-top: var(--spacing-xs); }

/* --- SECTION HEADERS --- */
.section-header { text-align: center; margin-bottom: var(--spacing-xl); }
.section-header h2 {
    font-family: 'Poppins', sans-serif;
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--dark);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
}
.section-header h2 i { color: var(--brand); }
.section-header .subtitle { color: var(--gray); font-size: 1rem; margin-top: var(--spacing-sm); }

/* --- CALCULATOR SECTION --- */
.calculator-section { padding: var(--spacing-2xl) 0; }
.calculator-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: start;
}

/* --- INPUT PANEL --- */
.input-panel {
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-lg);
}
.input-group { margin-bottom: var(--spacing-lg); }
.input-group.conditional { display: none; }
.input-group.conditional.visible { display: block; }
.input-group label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--dark);
    margin-bottom: var(--spacing-sm);
}
.input-group label i { color: var(--brand); width: 16px; text-align: center; }
.input-group select,
.input-group input[type="number"] {
    width: 100%;
    padding: 0.7rem 1rem;
    border: 2px solid #e5e7eb;
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    font-family: inherit;
    color: var(--dark);
    background: var(--white);
    transition: border-color 0.2s, box-shadow 0.2s;
}
.input-group select:focus,
.input-group input:focus {
    outline: none;
    border-color: var(--brand);
    box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.1);
}
.input-hint { font-size: 0.8rem; color: var(--gray); margin-top: var(--spacing-xs); }
.platform-note {
    font-size: 0.8rem;
    color: var(--brand-dark);
    background: var(--brand-light);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    margin-top: var(--spacing-xs);
    display: none;
}
.input-divider {
    border: none;
    border-top: 2px solid #e5e7eb;
    margin: var(--spacing-lg) 0;
}
.input-section-label {
    font-weight: 700;
    font-size: 0.85rem;
    color: var(--brand-dark);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

/* --- RESULTS PANEL --- */
.results-panel { position: sticky; top: 80px; }
.results-card {
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-lg);
    border-top: 4px solid var(--brand);
}
.results-card > h3 {
    font-family: 'Poppins', sans-serif;
    font-size: 1.2rem;
    color: var(--dark);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}
.results-card > h3 i { color: var(--brand); }

/* --- REVENUE SUMMARY --- */
.revenue-summary {
    background: linear-gradient(135deg, #fffbeb 0%, #fef3c7 100%);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    text-align: center;
}
.total-monthly-value {
    font-family: 'Poppins', sans-serif;
    font-size: 2.8rem;
    font-weight: 700;
    color: #22c55e;
    line-height: 1.1;
}
.total-monthly-label { font-size: 0.9rem; color: var(--gray); margin-top: var(--spacing-xs); }
.total-annual-row {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(217, 119, 6, 0.2);
}
.total-annual-row .label { font-size: 0.9rem; color: var(--gray); }
.total-annual-row .value {
    font-family: 'Poppins', sans-serif;
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--brand-dark);
}

/* --- REVENUE BREAKDOWN --- */
.revenue-breakdown {
    background: var(--gray-light);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}
.revenue-breakdown h4 {
    font-size: 0.95rem;
    color: var(--dark);
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}
.revenue-breakdown h4 i { color: var(--brand); }
.breakdown-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid #e5e7eb;
    font-size: 0.9rem;
}
.breakdown-row:last-child { border-bottom: none; }
.breakdown-row .label { color: var(--gray-dark); }
.breakdown-row .sublabel { font-size: 0.75rem; color: var(--gray); display: block; }
.breakdown-row .value { font-weight: 600; }
.breakdown-row .value.positive { color: var(--dark); }
.breakdown-row .value.negative { color: #ef4444; }
.breakdown-row .value.net { color: #22c55e; }
.breakdown-row.total {
    border-top: 2px solid #e5e7eb;
    border-bottom: none;
    padding-top: var(--spacing-md);
    margin-top: var(--spacing-sm);
}
.paid-subs-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    background: var(--brand-light);
    color: var(--brand-dark);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 2rem;
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

/* --- STREAM BREAKDOWN --- */
.stream-breakdown {
    background: var(--white);
    border: 2px solid #e5e7eb;
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}
.stream-breakdown h4 {
    font-size: 0.95rem;
    color: var(--dark);
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}
.stream-breakdown h4 i { color: var(--brand); }
.stream-row {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-sm) 0;
}
.stream-color {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    flex-shrink: 0;
}
.stream-color.sub { background: var(--stream-sub); }
.stream-color.sponsor { background: var(--stream-sponsor); }
.stream-color.referral { background: var(--stream-referral); }
.stream-info { flex: 1; }
.stream-label { font-size: 0.85rem; color: var(--gray-dark); font-weight: 500; }
.stream-value { font-size: 0.85rem; font-weight: 600; color: var(--dark); }
.stream-pct { font-size: 0.8rem; color: var(--gray); min-width: 40px; text-align: right; }
.stream-bar-container {
    width: 100%;
    height: 8px;
    background: #e5e7eb;
    border-radius: 4px;
    margin-top: var(--spacing-sm);
    overflow: hidden;
    display: flex;
}
.stream-bar {
    height: 100%;
    transition: width 0.3s ease;
    border-radius: 4px;
}
.stream-bar.sub { background: var(--stream-sub); }
.stream-bar.sponsor { background: var(--stream-sponsor); }
.stream-bar.referral { background: var(--stream-referral); }

/* --- FULLTIME ESTIMATE --- */
.fulltime-section {
    background: linear-gradient(135deg, #fffbeb 0%, #fef3c7 100%);
    border-left: 4px solid var(--brand);
    border-radius: var(--radius-sm);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}
.fulltime-section h4 {
    font-size: 0.95rem;
    color: var(--brand-dark);
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}
.fulltime-section h4 i { color: var(--brand); }
.fulltime-value {
    font-family: 'Poppins', sans-serif;
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--brand-dark);
    margin-bottom: var(--spacing-xs);
}
.fulltime-detail {
    font-size: 0.85rem;
    color: var(--gray-dark);
    line-height: 1.5;
}

/* --- COPY BUTTON --- */
.copy-result {
    width: 100%;
    padding: 0.85rem;
    background: var(--dark);
    color: var(--white);
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    transition: background 0.2s, transform 0.1s;
    margin-bottom: var(--spacing-md);
}
.copy-result:hover { background: #374151; transform: translateY(-1px); }
.copy-result:active { transform: translateY(0); }
.copy-result.copied { background: #22c55e; }

/* --- DISCLAIMER --- */
.disclaimer {
    font-size: 0.8rem;
    color: var(--gray);
    text-align: center;
    padding-top: var(--spacing-sm);
    border-top: 1px solid #e5e7eb;
}
.disclaimer i { margin-right: var(--spacing-xs); }

/* --- BENCHMARK TABLE --- */
.benchmark-section { padding: var(--spacing-2xl) 0; }
.benchmark-table-container { overflow-x: auto; }
.benchmark-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}
.benchmark-table thead { background: var(--dark); }
.benchmark-table th {
    color: var(--white);
    font-weight: 600;
    font-size: 0.9rem;
    padding: var(--spacing-md);
    text-align: left;
}
.benchmark-table td {
    padding: var(--spacing-md);
    font-size: 0.9rem;
    border-bottom: 1px solid #e5e7eb;
    color: var(--gray-dark);
}
.benchmark-table tbody tr:hover { background: #f9fafb; }

/* --- EDUCATION SECTION --- */
.education-section { padding: var(--spacing-2xl) 0; }
.education-content {
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow);
}
.education-content h3 {
    font-family: 'Poppins', sans-serif;
    font-size: 1.3rem;
    color: var(--dark);
    margin: var(--spacing-xl) 0 var(--spacing-md);
}
.education-content h3:first-child { margin-top: 0; }
.education-content p {
    color: var(--gray-dark);
    font-size: 0.95rem;
    margin-bottom: var(--spacing-md);
    line-height: 1.7;
}
.education-content ul { margin: var(--spacing-md) 0; padding-left: var(--spacing-lg); }
.education-content li {
    color: var(--gray-dark);
    font-size: 0.95rem;
    margin-bottom: var(--spacing-sm);
    line-height: 1.6;
}

/* --- FAQ SECTION --- */
.faq-section { padding: var(--spacing-2xl) 0; }
.faq-container { max-width: 800px; margin: 0 auto; }
.faq-item {
    background: var(--white);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow);
    overflow: hidden;
}
.faq-question {
    width: 100%;
    background: none;
    border: none;
    padding: var(--spacing-lg);
    font-size: 1rem;
    font-weight: 600;
    color: var(--dark);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    text-align: left;
    font-family: inherit;
    transition: background 0.2s;
}
.faq-question:hover { background: #f9fafb; }
.faq-question i {
    color: var(--brand);
    transition: transform 0.3s;
    flex-shrink: 0;
    margin-left: var(--spacing-md);
}
.faq-question.active i { transform: rotate(180deg); }
.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
}
.faq-answer.active {
    max-height: 600px;
    padding: 0 var(--spacing-lg) var(--spacing-lg);
}
.faq-answer p {
    color: var(--gray-dark);
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: var(--spacing-sm);
}
.faq-answer p:last-child { margin-bottom: 0; }
.faq-answer ul { margin: var(--spacing-sm) 0; padding-left: var(--spacing-lg); }
.faq-answer li { color: var(--gray-dark); font-size: 0.95rem; margin-bottom: var(--spacing-xs); }

/* --- RELATED TOOLS --- */
.related-section { padding: var(--spacing-2xl) 0; }
.related-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}
.related-card {
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    text-align: center;
    box-shadow: var(--shadow);
    transition: transform 0.2s, box-shadow 0.2s;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
    color: var(--dark);
}
.related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); color: var(--dark); }
.related-card i { font-size: 2rem; color: var(--brand); }
.related-card h3 { font-size: 1.1rem; font-weight: 600; }
.related-card p { font-size: 0.9rem; color: var(--gray); }

/* --- BUTTONS --- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 0.65rem 1.5rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.9rem;
    transition: all 0.2s;
    cursor: pointer;
    border: none;
    text-decoration: none;
}
.btn-primary { background: var(--brand); color: var(--white); }
.btn-primary:hover { background: var(--brand-dark); color: var(--white); transform: translateY(-1px); }

/* --- ADSENSE --- */
.adsense-container {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    text-align: center;
    min-height: 100px;
}

/* --- FOOTER --- */
.footer {
    background: var(--dark);
    color: #d1d5db;
    padding: var(--spacing-2xl) 0 var(--spacing-lg);
    margin-top: var(--spacing-xl);
}
.footer-content {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}
.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 700;
    font-size: 1.05rem;
    color: var(--white);
    margin-bottom: var(--spacing-md);
}
.footer-logo i { color: var(--brand); }
.footer-description { font-size: 0.85rem; color: #9ca3af; line-height: 1.6; }
.footer-title { font-size: 0.95rem; font-weight: 700; color: var(--white); margin-bottom: var(--spacing-md); }
.footer-link { display: block; color: #9ca3af; font-size: 0.85rem; margin-bottom: var(--spacing-sm); transition: color 0.2s; }
.footer-link:hover { color: var(--brand); }
.footer-bottom {
    border-top: 1px solid #374151;
    padding-top: var(--spacing-lg);
    text-align: center;
    font-size: 0.85rem;
    color: #9ca3af;
}
.footer-bottom p { margin-bottom: var(--spacing-sm); }

/* --- RESPONSIVE --- */
@media (max-width: 1024px) {
    .calculator-wrapper { grid-template-columns: 1fr; }
    .results-panel { position: static; }
    .footer-content { grid-template-columns: repeat(2, 1fr); }
    .related-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .hamburger { display: block; }
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--dark);
        flex-direction: column;
        padding: var(--spacing-md) var(--spacing-lg);
        border-top: 1px solid #374151;
    }
    .nav-links.active { display: flex; }
    .hero h1 { font-size: 1.7rem; }
    .hero .subtitle { font-size: 0.95rem; }
    .hero-stats { gap: var(--spacing-md); }
    .hero-stats .stat-number { font-size: 1.4rem; }
    .section-header h2 { font-size: 1.4rem; }
    .total-monthly-value { font-size: 2rem; }
    .footer-content { grid-template-columns: 1fr; }
    .benchmark-table { font-size: 0.8rem; }
    .benchmark-table th, .benchmark-table td { padding: var(--spacing-sm); }
}