/* stock-mutual-fund-returns-calculator.css */

/* -------------------------------------------------------------------------------------
   ROOT VARIABLES
------------------------------------------------------------------------------------- */

:root {
    --primary-blue: #0052cc;
    --hero-gradient: linear-gradient(135deg, #0061ff 0%, #0033aa 100%);
    --bg-light: #f8fafc;
    --white: #ffffff;
    --text-main: #1e293b;
    --text-muted: #64748b;
    --border-color: #e2e8f0;
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --radius: 12px;
    --transition: all 0.3s ease;
    --success-bg: #ecfdf5;
    --success-text: #047857;
    --warning-bg: #fff7ed;
    --warning-text: #c2410c;
    --danger-bg: #fef2f2;
    --danger-text: #b91c1c;
    --info-bg: #eff6ff;
    --info-border: #bfdbfe;
}

/* -------------------------------------------------------------------------------------
   GLOBAL RESET
------------------------------------------------------------------------------------- */

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: 'Inter', sans-serif;
    color: var(--text-main);
    background: var(--white);
    line-height: 1.7;
}

img {
    max-width: 100%;
    display: block;
}

a {
    color: var(--primary-blue);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    text-decoration: underline;
}

/* -------------------------------------------------------------------------------------
   LAYOUT HELPERS
------------------------------------------------------------------------------------- */

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 16px;
}

.section-padding {
    padding: 72px 0;
}

.bg-light {
    background: var(--bg-light);
}

.hidden {
    display: none !important;
}

.top-spacer {
    margin-top: 24px;
}

/* -------------------------------------------------------------------------------------
   SECTION HEADER
------------------------------------------------------------------------------------- */

.section-header {
    margin-bottom: 28px;
}

.section-header.left-align {
    text-align: left;
}

.section-header h2 {
    font-size: clamp(1.9rem, 3vw, 2.6rem);
    line-height: 1.2;
    margin: 0 0 12px;
    font-weight: 800;
}

.section-header p {
    margin: 0;
    max-width: 860px;
    color: var(--text-muted);
    font-size: 1.02rem;
}

/* -------------------------------------------------------------------------------------
   HERO
------------------------------------------------------------------------------------- */

.hero {
    background: var(--hero-gradient);
    color: var(--white);
    padding: 64px 0 72px;
}

.hero-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 16px;
}

.breadcrumb {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    font-size: 0.95rem;
    margin-bottom: 28px;
    opacity: 0.92;
}

.breadcrumb a,
.breadcrumb span {
    color: rgba(255, 255, 255, 0.92);
}

.hero-text {
    max-width: 920px;
    margin: 0;
}

.eyebrow {
    display: inline-flex;
    align-items: center;
    padding: 8px 14px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.14);
    font-size: 0.9rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    margin-bottom: 18px;
}

.hero h1 {
    font-size: clamp(2rem, 4vw, 3.4rem);
    line-height: 1.1;
    margin: 0 0 18px;
    font-weight: 800;
}

.hero p {
    font-size: 1.08rem;
    margin: 0;
    color: rgba(255, 255, 255, 0.95);
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-top: 30px;
}

.hero-note {
    margin-top: 20px !important;
    font-size: 0.96rem !important;
    opacity: 0.92;
}

/* -------------------------------------------------------------------------------------
   BUTTONS
------------------------------------------------------------------------------------- */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 48px;
    padding: 12px 22px;
    border-radius: 12px;
    border: none;
    font-weight: 700;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

.btn:hover {
    transform: translateY(-1px);
    text-decoration: none;
}

.btn-primary {
    background: var(--white);
    color: var(--primary-blue);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: transparent;
    color: var(--white);
    border: 1px solid rgba(255, 255, 255, 0.35);
}

.btn-light {
    background: var(--white);
    color: var(--primary-blue);
    border: 1px solid var(--border-color);
}

/* -------------------------------------------------------------------------------------
   QUICK NAV
------------------------------------------------------------------------------------- */

.quick-nav-section {
    margin-top: 16px;
    padding: 24px 0;
    border-bottom: 1px solid var(--border-color);
}

.quick-nav-simple h2 {
    font-size: 1.1rem;
    margin: 0 0 10px;
    font-weight: 700;
}

.quick-nav-links {
    display: flex;
    flex-wrap: wrap;
    gap: 12px 18px;
}

.quick-nav-links a {
    font-size: 0.95rem;
    color: var(--primary-blue);
    border-bottom: 1px solid transparent;
}

.quick-nav-links a:hover {
    color: var(--primary-blue);
}

/* -------------------------------------------------------------------------------------
   COMMON CARDS
------------------------------------------------------------------------------------- */

.content-card,
.table-card,
.trust-card,
.cta-card,
.calculator-card,
.use-card,
.method-card,
.benefit-card,
.tip-card,
.step-card,
.related-card,
.snapshot-card,
.interpretation-card,
.chart-card,
.example-card,
.formula-summary-card,
.mini-card {
    border-radius: 20px;
}

.content-card,
.table-card,
.trust-card,
.cta-card {
    background: var(--white);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    padding: 28px;
}

.prose p {
    margin: 0 0 18px;
    color: var(--text-main);
}

.prose p:last-child {
    margin-bottom: 0;
}

.prose a {
    font-weight: 600;
}

/* -------------------------------------------------------------------------------------
   GRIDS
------------------------------------------------------------------------------------- */

.use-grid,
.method-grid,
.benefit-grid,
.tips-grid,
.steps-grid,
.related-grid,
.examples-grid,
.mistakes-grid {
    display: grid;
    gap: 20px;
}

.use-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.method-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.benefit-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.tips-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.steps-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.related-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.related-grid.related-grid-4 {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.examples-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.mistakes-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

/* -------------------------------------------------------------------------------------
   GRID CARD STYLING
------------------------------------------------------------------------------------- */

.use-card,
.method-card,
.benefit-card,
.tip-card,
.step-card,
.related-card,
.example-card,
.mini-card {
    background: var(--white);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    padding: 24px;
    transition: var(--transition);
}

.use-card:hover,
.method-card:hover,
.benefit-card:hover,
.tip-card:hover,
.step-card:hover,
.related-card:hover,
.example-card:hover,
.mini-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
    text-decoration: none;
}

.use-card i,
.benefit-card i {
    font-size: 1.4rem;
    color: var(--primary-blue);
    margin-bottom: 14px;
}

.use-card h3,
.method-card h3,
.benefit-card h3,
.tip-card h3,
.step-card h3,
.related-card h3,
.example-card h3,
.mini-card h3 {
    margin: 0 0 10px;
    font-size: 1.12rem;
    line-height: 1.35;
}

.use-card p,
.method-card p,
.benefit-card p,
.tip-card p,
.step-card p,
.related-card p,
.example-card p,
.mini-card p {
    margin: 0 0 10px;
    color: var(--text-muted);
    font-size: 0.98rem;
}

.example-card p:last-child,
.related-card p:last-child,
.mini-card p:last-child {
    margin-bottom: 0;
}

.related-card {
    color: inherit;
}

/* -------------------------------------------------------------------------------------
   CALCULATOR
------------------------------------------------------------------------------------- */

.calculator-grid {
    display: grid;
    grid-template-columns: 1.08fr 0.92fr;
    gap: 24px;
    align-items: start;
}

.calculator-card {
    background: var(--white);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
    padding: 28px;
}

.calculator-card h3 {
    margin: 0 0 10px;
    font-size: 1.4rem;
}

.card-intro {
    margin: 0 0 22px;
    color: var(--text-muted);
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
}

.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 700;
    font-size: 0.96rem;
}

.form-group input,
.form-group select {
    width: 100%;
    min-height: 50px;
    padding: 12px 14px;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    background: var(--white);
    font: inherit;
    color: var(--text-main);
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 4px rgba(0, 82, 204, 0.12);
}

.button-row {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 8px;
}

.form-message {
    padding: 14px 16px;
    border-radius: 12px;
    margin-bottom: 18px;
    font-weight: 600;
    font-size: 0.95rem;
}

.error-message {
    background: var(--danger-bg);
    color: var(--danger-text);
    border: 1px solid #fecaca;
}

/* -------------------------------------------------------------------------------------
   RESULTS
------------------------------------------------------------------------------------- */

.results-placeholder {
    min-height: 460px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    background: var(--bg-light);
    border: 1px dashed #cbd5e1;
    border-radius: 18px;
    padding: 28px;
}

.results-placeholder i {
    font-size: 2rem;
    color: var(--primary-blue);
    margin-bottom: 14px;
}

.results-placeholder p {
    max-width: 430px;
    margin: 0;
    color: var(--text-muted);
}

.status-banner {
    padding: 18px;
    border-radius: 16px;
    margin-bottom: 20px;
    border: 1px solid transparent;
}

.status-banner.general {
    background: var(--info-bg);
    border-color: var(--info-border);
    color: var(--primary-blue);
}

.status-banner.strong {
    background: var(--success-bg);
    border-color: #a7f3d0;
    color: var(--success-text);
}

.status-banner.caution {
    background: var(--warning-bg);
    border-color: #fed7aa;
    color: var(--warning-text);
}

.status-badge {
    display: inline-flex;
    padding: 8px 12px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.55);
    font-weight: 800;
    font-size: 0.88rem;
    margin-bottom: 10px;
}

.status-banner p {
    margin: 0;
    font-weight: 600;
}

.results-summary-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
    margin-bottom: 20px;
}

.summary-item {
    background: var(--bg-light);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 18px;
}

.summary-item .label {
    display: block;
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 8px;
}

.summary-item strong {
    font-size: 1.18rem;
    line-height: 1.3;
}

.summary-item.accent {
    background: #eff6ff;
    border-color: #bfdbfe;
}

.snapshot-card,
.interpretation-card,
.chart-card,
.formula-summary-card {
    background: var(--bg-light);
    border: 1px solid var(--border-color);
    padding: 20px;
}

.snapshot-card h4,
.interpretation-card h4,
.chart-card h4,
.formula-summary-card h4 {
    margin: 0 0 14px;
    font-size: 1.04rem;
}

.snapshot-row {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    padding: 10px 0;
    border-bottom: 1px solid var(--border-color);
}

.snapshot-row:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.snapshot-row span {
    color: var(--text-muted);
}

.formula-summary-card {
    margin-top: 18px;
}

.formula-summary-card p,
.interpretation-card p {
    margin: 0;
    color: var(--text-main);
}

/* -------------------------------------------------------------------------------------
   CHART
------------------------------------------------------------------------------------- */

.chart-card {
    margin-top: 18px;
}

.chart-wrap {
    background: var(--white);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 16px;
    overflow: hidden;
}

.chart-wrap canvas {
    display: block;
    width: 100%;
    height: auto;
}

.chart-note {
    margin: 12px 0 0;
    color: var(--text-muted);
    font-size: 0.92rem;
}

.interpretation-card {
    margin-top: 18px;
}

/* -------------------------------------------------------------------------------------
   STEPS
------------------------------------------------------------------------------------- */

.step-card {
    position: relative;
    padding-top: 56px;
}

.step-number {
    position: absolute;
    top: 20px;
    left: 20px;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--primary-blue);
    color: var(--white);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 0.95rem;
}

/* -------------------------------------------------------------------------------------
   FORMULAS
------------------------------------------------------------------------------------- */

.formula-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
    margin: 22px 0;
}

.formula-grid.formula-grid-2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.formula-box {
    background: #eff6ff;
    color: var(--text-main);
    border: 1px solid #bfdbfe;
    border-radius: 14px;
    padding: 18px;
    font-weight: 700;
    text-align: center;
}

.formula-large {
    background: #eff6ff;
    border: 1px solid #bfdbfe;
    color: var(--text-main);
    border-radius: 18px;
    padding: 20px;
    margin-bottom: 18px;
    text-align: center;
    font-size: clamp(1rem, 2vw, 1.25rem);
    font-weight: 800;
    overflow-wrap: anywhere;
}

/* -------------------------------------------------------------------------------------
   FAQ
------------------------------------------------------------------------------------- */

.faq-list {
    display: grid;
    gap: 16px;
}

.faq-item {
    background: var(--white);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
    padding: 0;
    overflow: hidden;
}

.faq-item summary {
    list-style: none;
    cursor: pointer;
    padding: 20px 22px;
    font-weight: 700;
    position: relative;
}

.faq-item summary::-webkit-details-marker {
    display: none;
}

.faq-item summary::after {
    content: '+';
    position: absolute;
    right: 22px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.2rem;
    color: var(--primary-blue);
}

.faq-item[open] summary::after {
    content: '−';
}

.faq-item p {
    margin: 0;
    padding: 0 22px 22px;
    color: var(--text-muted);
}

/* -------------------------------------------------------------------------------------
   TRUST CARD
------------------------------------------------------------------------------------- */

.trust-card {
    text-align: left;
}

.trust-card h2 {
    margin: 0 0 12px;
    font-size: 1.7rem;
}

.trust-card p {
    margin: 0;
    color: var(--text-muted);
}

/* -------------------------------------------------------------------------------------
   CTA
------------------------------------------------------------------------------------- */

.cta-card {
    background: var(--hero-gradient);
    color: var(--white);
    text-align: center;
    padding: 40px 28px;
}

.cta-card h2 {
    margin: 0 0 12px;
    font-size: clamp(1.7rem, 2.8vw, 2.4rem);
    line-height: 1.2;
}

.cta-card p {
    margin: 0 auto 22px;
    max-width: 760px;
    color: rgba(255, 255, 255, 0.94);
}

.cta-card .btn-primary {
    min-width: 240px;
}

/* -------------------------------------------------------------------------------------
   RESPONSIVE
------------------------------------------------------------------------------------- */

@media (max-width: 1200px) {
    .related-grid.related-grid-4 {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .mistakes-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}

@media (max-width: 1100px) {
    .calculator-grid,
    .use-grid,
    .benefit-grid,
    .related-grid,
    .tips-grid,
    .examples-grid,
    .mistakes-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .steps-grid,
    .method-grid,
    .formula-grid.formula-grid-2 {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

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

@media (max-width: 768px) {
    .section-padding {
        padding: 56px 0;
    }

    .hero {
        padding: 48px 0 56px;
    }

    .quick-nav-simple h2 {
        font-size: 1rem;
    }

    .quick-nav-links {
        gap: 8px 12px;
    }

    .quick-nav-links a {
        font-size: 0.9rem;
        padding: 6px 0;
    }

    .content-card,
    .table-card,
    .trust-card,
    .cta-card,
    .calculator-card,
    .use-card,
    .method-card,
    .benefit-card,
    .tip-card,
    .step-card,
    .related-card,
    .example-card,
    .snapshot-card,
    .interpretation-card,
    .chart-card,
    .formula-summary-card,
    .mini-card {
        border-radius: 16px;
    }

    .calculator-grid,
    .use-grid,
    .method-grid,
    .benefit-grid,
    .tips-grid,
    .steps-grid,
    .related-grid,
    .examples-grid,
    .mistakes-grid,
    .results-summary-grid,
    .formula-grid,
    .formula-grid.formula-grid-2,
    .form-grid {
        grid-template-columns: 1fr;
    }

    .calculator-card,
    .content-card,
    .trust-card,
    .cta-card {
        padding: 22px;
    }

    .btn {
        width: 100%;
    }

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

    .snapshot-row {
        flex-direction: column;
        align-items: flex-start;
    }

    .summary-item strong {
        font-size: 1.08rem;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 2rem;
    }

    .hero p,
    .section-header p,
    .prose p,
    .use-card p,
    .method-card p,
    .benefit-card p,
    .tip-card p,
    .step-card p,
    .related-card p,
    .example-card p,
    .mini-card p {
        font-size: 0.96rem;
    }

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