/**
 * Foot Sizing Tips - Custom Blog Post Design
 * Beautiful, modern design for https://friendlyshoes.com/friendly-blog/foot-sizing-tips
 */

/* ============================================
   VARIABLES & ROOT STYLES
   ============================================ */
:root {
    --fs-primary: #00a9e0;
    --fs-primary-dark: #0088b8;
    --fs-secondary: #1a2640;
    --fs-accent: #e83d3d;
    --fs-text: #222222;
    --fs-text-light: #666666;
    --fs-bg-light: #f8f9fa;
    --fs-bg-gradient: linear-gradient(135deg, #00a9e0 0%, #0088b8 100%);
    --fs-shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --fs-shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --fs-shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.16);
    --fs-radius: 12px;
    --fs-radius-lg: 16px;
}

#foot-sizing-guide {
    font-family: 'Roboto', sans-serif;
    color: var(--fs-text);
    line-height: 1.7;
}

/* ============================================
   HERO SECTION
   ============================================ */
.fs-hero {
    position: relative;
    background: var(--fs-bg-gradient);
    color: white;
    padding: 80px 0 60px;
    margin-bottom: 60px;
    overflow: hidden;
    width: 100%;
    margin-left: calc(-50vw + 50%);
    margin-right: calc(-50vw + 50%);
}

.fs-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.fs-hero-inner {
    position: relative;
    z-index: 2;
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
    padding: 0 40px;
}

.fs-hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    padding: 8px 20px;
    border-radius: 50px;
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 0.5px;
    margin-bottom: 20px;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.fs-badge-icon {
    width: 16px;
    height: 16px;
}

.fs-hero h1 {
    font-size: 48px;
    font-weight: 900;
    margin: 0 0 20px;
    line-height: 1.2;
    text-shadow: 0 2px 20px rgba(0, 0, 0, 0.2);
}

.fs-hero-subtitle {
    font-size: 22px;
    font-weight: 300;
    margin: 0 0 30px;
    opacity: 0.95;
    line-height: 1.5;
}

.fs-hero-meta {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    font-size: 14px;
    opacity: 0.9;
    margin-top: 30px;
}

.fs-hero-meta-item {
    display: flex;
    align-items: center;
    gap: 6px;
}

.fs-scroll-indicator {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    opacity: 0.8;
    animation: fs-bounce 2s infinite;
}

.fs-scroll-indicator span {
    display: block;
    font-size: 12px;
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

@keyframes fs-bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    40% {
        transform: translateX(-50%) translateY(-10px);
    }
    60% {
        transform: translateX(-50%) translateY(-5px);
    }
}

/* ============================================
   CONTENT SECTIONS
   ============================================ */
.fs-section {
    padding: 40px 0;
}

.fs-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 40px;
}

.fs-content-wide {
    max-width: 1600px;
    margin: 0 auto;
    padding: 0 40px;
}

.fs-intro {
    background: white;
    padding: 60px 0;
}

.fs-intro p.fs-lead {
    font-size: 20px;
    font-weight: 400;
    color: var(--fs-text);
    margin-bottom: 30px;
    line-height: 1.8;
}

.fs-intro p {
    font-size: 16px;
    margin-bottom: 20px;
    color: var(--fs-text-light);
}

/* ============================================
   STEP CARDS / TIP BOXES
   ============================================ */
.fs-step-card {
    background: white;
    border-radius: var(--fs-radius-lg);
    box-shadow: var(--fs-shadow-md);
    padding: 40px;
    margin-bottom: 30px;
    border-left: 5px solid var(--fs-primary);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

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

.fs-step-header {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 24px;
}

.fs-step-number {
    flex-shrink: 0;
    width: 60px;
    height: 60px;
    background: var(--fs-bg-gradient);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    font-weight: 900;
    box-shadow: var(--fs-shadow-sm);
}

.fs-step-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--fs-secondary);
    margin: 0;
    line-height: 1.3;
}

.fs-step-content {
    font-size: 16px;
    line-height: 1.8;
    color: var(--fs-text);
}

.fs-step-content p {
    margin-bottom: 16px;
}

.fs-step-content ul,
.fs-step-content ol {
    margin: 20px 0;
    padding-left: 24px;
}

.fs-step-content li {
    margin-bottom: 12px;
    line-height: 1.8;
}

.fs-step-content strong {
    color: var(--fs-secondary);
    font-weight: 600;
}

/* ============================================
   CALLOUT BOXES
   ============================================ */
.fs-callout {
    background: linear-gradient(135deg, #fff3cd 0%, #ffeaa7 100%);
    border-left: 5px solid #ffc107;
    border-radius: var(--fs-radius);
    padding: 24px 28px;
    margin: 30px 0;
    box-shadow: var(--fs-shadow-sm);
}

.fs-callout-warning {
    background: linear-gradient(135deg, #f8d7da 0%, #f5c2c7 100%);
    border-left-color: #dc3545;
}

.fs-callout-info {
    background: linear-gradient(135deg, #d1ecf1 0%, #bee5eb 100%);
    border-left-color: #17a2b8;
}

.fs-callout-success {
    background: linear-gradient(135deg, #d4edda 0%, #c3e6cb 100%);
    border-left-color: #28a745;
}

.fs-callout-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--fs-secondary);
    margin: 0 0 12px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.fs-callout-icon {
    width: 24px;
    height: 24px;
}

.fs-callout p {
    margin: 0;
    color: var(--fs-text);
    font-size: 15px;
    line-height: 1.7;
}

/* ============================================
   MEASUREMENT GRID
   ============================================ */
.fs-measurement-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    margin: 30px 0;
}

@media (max-width: 1199px) {
    .fs-measurement-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.fs-measurement-card {
    background: white;
    border-radius: var(--fs-radius);
    padding: 24px;
    box-shadow: var(--fs-shadow-sm);
    border-top: 4px solid var(--fs-primary);
    transition: all 0.3s ease;
}

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

.fs-measurement-icon {
    width: 48px;
    height: 48px;
    background: var(--fs-bg-gradient);
    border-radius: var(--fs-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
}

.fs-measurement-icon svg {
    width: 24px;
    height: 24px;
    color: white;
}

.fs-measurement-card h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--fs-secondary);
    margin: 0 0 12px;
}

.fs-measurement-card p {
    font-size: 14px;
    color: var(--fs-text-light);
    margin: 0;
    line-height: 1.6;
}

/* ============================================
   MISTAKE CARDS
   ============================================ */
.fs-mistakes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin: 30px 0;
}

.fs-mistake-card {
    background: white;
    border-radius: var(--fs-radius);
    padding: 24px;
    box-shadow: var(--fs-shadow-sm);
    border-left: 4px solid var(--fs-accent);
    display: flex;
    gap: 16px;
}

.fs-mistake-icon {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, #e83d3d 0%, #c82333 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 900;
}

.fs-mistake-content h4 {
    font-size: 16px;
    font-weight: 700;
    color: var(--fs-secondary);
    margin: 0 0 8px;
}

.fs-mistake-content p {
    font-size: 14px;
    color: var(--fs-text-light);
    margin: 0;
    line-height: 1.6;
}

/* ============================================
   SECTION HEADERS
   ============================================ */
.fs-section-header {
    text-align: center;
    margin-bottom: 50px;
    position: relative;
}

.fs-section-number {
    display: inline-block;
    font-size: 14px;
    font-weight: 700;
    color: var(--fs-primary);
    background: rgba(0, 169, 224, 0.1);
    padding: 6px 16px;
    border-radius: 50px;
    margin-bottom: 16px;
    letter-spacing: 1px;
}

.fs-section-header h2 {
    font-size: 36px;
    font-weight: 900;
    color: var(--fs-secondary);
    margin: 0 0 16px;
    line-height: 1.3;
}

.fs-section-header p {
    font-size: 18px;
    color: var(--fs-text-light);
    margin: 0;
    max-width: 700px;
    margin: 0 auto;
}

/* ============================================
   CTA SECTION
   ============================================ */
.fs-cta-section {
    background: var(--fs-bg-gradient);
    color: white;
    padding: 80px 0;
    margin-top: 60px;
    position: relative;
    overflow: hidden;
    width: 100%;
    margin-left: calc(-50vw + 50%);
    margin-right: calc(-50vw + 50%);
}

.fs-cta-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(circle at 30% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 70% 80%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.fs-cta-inner {
    position: relative;
    z-index: 2;
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
    padding: 0 40px;
}

.fs-cta-inner h2 {
    font-size: 42px;
    font-weight: 900;
    margin: 0 0 20px;
    line-height: 1.2;
}

.fs-cta-inner p {
    font-size: 20px;
    margin: 0 0 40px;
    opacity: 0.95;
    line-height: 1.6;
}

.fs-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 40px;
    font-size: 18px;
    font-weight: 700;
    text-decoration: none;
    border-radius: 50px;
    transition: all 0.3s ease;
    box-shadow: var(--fs-shadow-md);
}

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

.fs-btn-primary:hover {
    background: var(--fs-bg-light);
    transform: translateY(-2px);
    box-shadow: var(--fs-shadow-lg);
    color: var(--fs-primary-dark);
}

.fs-btn-outline {
    background: transparent;
    color: white;
    border: 2px solid white;
    margin-left: 16px;
}

.fs-btn-outline:hover {
    background: white;
    color: var(--fs-primary);
    transform: translateY(-2px);
    box-shadow: var(--fs-shadow-lg);
}

/* ============================================
   QUICK TIPS BOXES
   ============================================ */
.fs-quick-tips {
    background: var(--fs-bg-light);
    border-radius: var(--fs-radius-lg);
    padding: 40px;
    margin: 40px 0;
}

.fs-quick-tips h3 {
    font-size: 24px;
    font-weight: 900;
    color: var(--fs-secondary);
    margin: 0 0 24px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.fs-quick-tips-icon {
    width: 32px;
    height: 32px;
    color: var(--fs-primary);
}

.fs-quick-tips ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.fs-quick-tips li {
    padding: 16px 0 16px 40px;
    position: relative;
    font-size: 16px;
    line-height: 1.7;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.fs-quick-tips li:last-child {
    border-bottom: none;
}

.fs-quick-tips li::before {
    content: '✓';
    position: absolute;
    left: 0;
    top: 16px;
    width: 28px;
    height: 28px;
    background: var(--fs-primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 900;
    font-size: 16px;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 768px) {
    .fs-hero h1 {
        font-size: 32px;
    }

    .fs-hero-subtitle {
        font-size: 18px;
    }

    .fs-hero {
        padding: 60px 0 40px;
    }

    .fs-hero-inner,
    .fs-cta-inner,
    .fs-content {
        padding: 0 20px;
    }

    .fs-section-header h2 {
        font-size: 28px;
    }

    .fs-step-card {
        padding: 24px;
    }

    .fs-step-number {
        width: 50px;
        height: 50px;
        font-size: 24px;
    }

    .fs-step-title {
        font-size: 20px;
    }

    .fs-measurement-grid,
    .fs-mistakes-grid,
    .fs-horizontal-cards {
        grid-template-columns: 1fr;
    }

    .fs-cta-inner h2 {
        font-size: 32px;
    }

    .fs-cta-inner p {
        font-size: 18px;
    }

    .fs-btn {
        padding: 14px 32px;
        font-size: 16px;
    }

    .fs-btn-outline {
        margin-left: 0;
        margin-top: 16px;
    }

    .fs-hero-meta {
        flex-direction: column;
        gap: 10px;
    }
}

@media (max-width: 480px) {
    .fs-hero h1 {
        font-size: 28px;
    }

    .fs-step-header {
        flex-direction: column;
        text-align: center;
    }

    .fs-quick-tips {
        padding: 24px;
    }
}

/* ============================================
   HORIZONTAL CARDS (Measurement Types)
   ============================================ */
.fs-horizontal-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    margin: 40px 0;
}

@media (max-width: 1199px) {
    .fs-horizontal-cards {
        grid-template-columns: repeat(2, 1fr);
    }
}

.fs-horizontal-card {
    background: white;
    border-radius: var(--fs-radius-lg);
    padding: 32px;
    box-shadow: var(--fs-shadow-md);
    border-top: 5px solid var(--fs-primary);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.fs-horizontal-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 5px;
    background: var(--fs-bg-gradient);
}

.fs-horizontal-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--fs-shadow-lg);
}

.fs-horizontal-card-icon {
    width: 64px;
    height: 64px;
    background: var(--fs-bg-gradient);
    border-radius: var(--fs-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    box-shadow: var(--fs-shadow-sm);
}

.fs-horizontal-card-icon svg {
    width: 32px;
    height: 32px;
    color: white;
}

.fs-horizontal-card-number {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 40px;
    height: 40px;
    background: rgba(0, 169, 224, 0.1);
    color: var(--fs-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    font-weight: 900;
}

.fs-horizontal-card h3 {
    font-size: 22px;
    font-weight: 700;
    color: var(--fs-secondary);
    margin: 0 0 16px;
    line-height: 1.3;
}

.fs-horizontal-card p {
    font-size: 15px;
    color: var(--fs-text-light);
    margin: 0 0 16px;
    line-height: 1.7;
}

.fs-why-matters {
    background: var(--fs-bg-light);
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 14px;
    line-height: 1.6;
    margin-top: 16px;
}

.fs-why-matters strong {
    color: var(--fs-primary);
}

/* ============================================
   QUICK TIPS GRID - BEAUTIFUL CARDS
   ============================================ */
.fs-quick-tips-section {
    margin: 50px 0;
}

.fs-quick-tips-title {
    font-size: 28px;
    font-weight: 900;
    color: var(--fs-secondary);
    margin: 0 0 32px;
    display: flex;
    align-items: center;
    gap: 16px;
}

.fs-quick-tips-icon-wrapper {
    width: 48px;
    height: 48px;
    background: var(--fs-bg-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 15px rgba(0, 169, 224, 0.3);
}

.fs-quick-tips-icon-wrapper svg {
    width: 24px;
    height: 24px;
    stroke: white;
}

.fs-quick-tips-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

@media (max-width: 1199px) {
    .fs-quick-tips-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 600px) {
    .fs-quick-tips-grid {
        grid-template-columns: 1fr;
    }
}

.fs-quick-tip-card {
    background: white;
    border-radius: var(--fs-radius-lg);
    padding: 28px 24px;
    display: flex;
    align-items: flex-start;
    gap: 16px;
    box-shadow: var(--fs-shadow-sm);
    border: 1px solid rgba(0, 0, 0, 0.04);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.fs-quick-tip-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--fs-bg-gradient);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.fs-quick-tip-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--fs-shadow-lg);
}

.fs-quick-tip-card:hover::before {
    opacity: 1;
}

.fs-quick-tip-card-highlight {
    background: linear-gradient(135deg, #f0faff 0%, #e6f7ff 100%);
    border: 2px solid var(--fs-primary);
}

.fs-quick-tip-card-highlight::before {
    opacity: 1;
}

.fs-quick-tip-icon {
    width: 52px;
    height: 52px;
    min-width: 52px;
    background: linear-gradient(135deg, var(--fs-primary) 0%, var(--fs-primary-dark) 100%);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(0, 169, 224, 0.25);
}

.fs-quick-tip-icon svg {
    width: 26px;
    height: 26px;
    stroke: white;
}

.fs-quick-tip-content h4 {
    font-size: 17px;
    font-weight: 800;
    color: var(--fs-secondary);
    margin: 0 0 6px;
    line-height: 1.3;
}

.fs-quick-tip-content p {
    font-size: 14px;
    color: var(--fs-text-light);
    margin: 0;
    line-height: 1.5;
}

/* 7 items layout - 4+3 with centered last row */
@media (min-width: 1200px) {
    .fs-quick-tips-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
    }

    .fs-quick-tip-card:nth-child(5) {
        grid-column: 1;
    }

    .fs-quick-tip-card:nth-child(6) {
        grid-column: 2;
    }

    .fs-quick-tip-card:nth-child(7) {
        grid-column: 3;
    }
}

/* ============================================
   STEPS GRID - 2x2 LAYOUT
   ============================================ */
.fs-steps-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 28px;
    margin: 40px 0;
}

@media (max-width: 768px) {
    .fs-steps-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
}

.fs-step-grid-card {
    background: white;
    border-radius: var(--fs-radius-lg);
    padding: 32px;
    box-shadow: var(--fs-shadow-md);
    display: flex;
    gap: 20px;
    align-items: flex-start;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.fs-step-grid-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 5px;
    height: 100%;
    background: var(--fs-bg-gradient);
}

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

.fs-step-grid-number {
    width: 56px;
    height: 56px;
    min-width: 56px;
    background: var(--fs-bg-gradient);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: 900;
    color: white;
    box-shadow: 0 4px 15px rgba(0, 169, 224, 0.3);
}

.fs-step-grid-content h3 {
    font-size: 20px;
    font-weight: 800;
    color: var(--fs-secondary);
    margin: 0 0 12px;
    line-height: 1.3;
}

.fs-step-grid-content p {
    font-size: 15px;
    color: var(--fs-text-light);
    margin: 0 0 12px;
    line-height: 1.7;
}

.fs-step-grid-content p:last-child {
    margin-bottom: 0;
}

.fs-step-grid-content .fs-pro-tip {
    background: linear-gradient(135deg, #e8f4fd 0%, #d1ecf1 100%);
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 14px;
    color: var(--fs-secondary);
    border-left: 3px solid var(--fs-primary);
}

.fs-step-grid-content .fs-important {
    background: linear-gradient(135deg, #fff3cd 0%, #ffeeba 100%);
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 14px;
    color: #856404;
    border-left: 3px solid #ffc107;
}

@media (max-width: 480px) {
    .fs-step-grid-card {
        padding: 24px;
        flex-direction: column;
        gap: 16px;
    }

    .fs-step-grid-number {
        width: 48px;
        height: 48px;
        min-width: 48px;
        font-size: 20px;
    }

    .fs-step-grid-content h3 {
        font-size: 18px;
    }
}

/* ============================================
   CAROUSEL - STEP CARDS (legacy)
   ============================================ */
.fs-carousel-wrapper {
    position: relative;
    margin: 40px 0;
}

.fs-carousel-container {
    overflow: hidden;
    position: relative;
}

.fs-carousel-track {
    display: flex;
    gap: 20px;
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.fs-carousel-card {
    flex: 0 0 calc(33.333% - 14px);
    background: white;
    border-radius: var(--fs-radius-lg);
    box-shadow: var(--fs-shadow-md);
    padding: 32px;
    border-left: 5px solid var(--fs-primary);
    min-height: 280px;
    display: flex;
    flex-direction: column;
}

.fs-carousel-card-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 20px;
}

.fs-carousel-number {
    flex-shrink: 0;
    width: 56px;
    height: 56px;
    background: var(--fs-bg-gradient);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 26px;
    font-weight: 900;
    box-shadow: var(--fs-shadow-sm);
}

.fs-carousel-card-header h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--fs-secondary);
    margin: 0;
    line-height: 1.3;
}

.fs-carousel-card-content {
    font-size: 15px;
    line-height: 1.7;
    color: var(--fs-text);
}

.fs-carousel-card-content p {
    margin: 0 0 12px;
}

.fs-carousel-card-content .fs-pro-tip,
.fs-carousel-card-content .fs-important {
    background: rgba(0, 169, 224, 0.05);
    padding: 12px;
    border-radius: 8px;
    margin-top: 12px;
    font-size: 14px;
}

/* Navigation Arrows */
.fs-carousel-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 48px;
    height: 48px;
    background: white;
    border: 2px solid var(--fs-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 10;
    transition: all 0.3s ease;
    box-shadow: var(--fs-shadow-md);
}

.fs-carousel-nav:hover:not(:disabled) {
    background: var(--fs-primary);
    transform: translateY(-50%) scale(1.1);
    box-shadow: var(--fs-shadow-lg);
}

.fs-carousel-nav:hover:not(:disabled) svg {
    color: white;
}

.fs-carousel-nav:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.fs-carousel-nav svg {
    width: 24px;
    height: 24px;
    color: var(--fs-primary);
    transition: color 0.3s ease;
}

.fs-carousel-prev {
    left: -24px;
}

.fs-carousel-next {
    right: -24px;
}

/* Carousel Dots */
.fs-carousel-dots {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 30px;
}

.fs-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: #ddd;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
    padding: 0;
}

.fs-dot:hover {
    background: var(--fs-primary);
    transform: scale(1.2);
}

.fs-dot.active {
    background: var(--fs-primary);
    width: 32px;
    border-radius: 6px;
}

/* ============================================
   MISTAKES GRID - 3x2 LAYOUT
   ============================================ */
.fs-mistakes-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin: 40px 0;
}

@media (max-width: 1024px) {
    .fs-mistakes-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 600px) {
    .fs-mistakes-grid {
        grid-template-columns: 1fr;
    }
}

.fs-mistake-card {
    background: white;
    border-radius: var(--fs-radius-lg);
    padding: 28px;
    display: flex;
    gap: 18px;
    align-items: flex-start;
    box-shadow: var(--fs-shadow-sm);
    border-left: 4px solid var(--fs-accent);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.fs-mistake-icon-badge {
    width: 48px;
    height: 48px;
    min-width: 48px;
    background: linear-gradient(135deg, #e83d3d 0%, #c82333 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(232, 61, 61, 0.3);
}

.fs-mistake-icon-badge svg {
    width: 22px;
    height: 22px;
    stroke: white;
}

.fs-mistake-card-content h4 {
    font-size: 17px;
    font-weight: 800;
    color: var(--fs-secondary);
    margin: 0 0 8px;
    line-height: 1.3;
}

.fs-mistake-card-content p {
    font-size: 14px;
    color: var(--fs-text-light);
    margin: 0;
    line-height: 1.6;
}

@media (max-width: 480px) {
    .fs-mistake-card {
        padding: 20px;
    }

    .fs-mistake-icon-badge {
        width: 40px;
        height: 40px;
        min-width: 40px;
    }

    .fs-mistake-icon-badge svg {
        width: 18px;
        height: 18px;
    }
}

/* ============================================
   MISTAKES SLIDER (legacy)
   ============================================ */
.fs-mistakes-slider-wrapper {
    position: relative;
    margin: 40px 0;
}

.fs-mistakes-slider {
    overflow: hidden;
    position: relative;
}

.fs-mistakes-track {
    display: flex;
    gap: 32px;
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.fs-mistake-slide {
    flex: 0 0 calc(33.333% - 22px);
    background: white;
    border-radius: var(--fs-radius);
    padding: 28px;
    box-shadow: var(--fs-shadow-sm);
    border-left: 4px solid var(--fs-accent);
    display: flex;
    gap: 20px;
    min-height: 200px;
}

@media (max-width: 1199px) {
    .fs-mistake-slide {
        flex: 0 0 calc(50% - 16px);
    }
}

.fs-mistake-slide .fs-mistake-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, #e83d3d 0%, #c82333 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 900;
    font-size: 24px;
    box-shadow: var(--fs-shadow-sm);
}

.fs-mistake-slide .fs-mistake-content h4 {
    font-size: 18px;
    font-weight: 700;
    color: var(--fs-secondary);
    margin: 0 0 12px;
}

.fs-mistake-slide .fs-mistake-content p {
    font-size: 15px;
    color: var(--fs-text-light);
    margin: 0;
    line-height: 1.7;
}

/* ============================================
   RESPONSIVE CAROUSEL & SLIDERS
   ============================================ */
@media (max-width: 1199px) {
    .fs-carousel-card {
        flex: 0 0 calc(50% - 10px);
    }

    .fs-carousel-prev {
        left: -16px;
    }

    .fs-carousel-next {
        right: -16px;
    }
}

@media (max-width: 768px) {
    .fs-carousel-card,
    .fs-mistake-slide {
        flex: 0 0 100%;
    }

    .fs-carousel-nav {
        width: 40px;
        height: 40px;
    }

    .fs-carousel-nav svg {
        width: 20px;
        height: 20px;
    }

    .fs-carousel-prev {
        left: 0;
    }

    .fs-carousel-next {
        right: 0;
    }

    .fs-carousel-card {
        padding: 24px;
        min-height: auto;
    }

    .fs-carousel-number {
        width: 48px;
        height: 48px;
        font-size: 22px;
    }
}

@media (max-width: 480px) {
    .fs-horizontal-card {
        padding: 24px;
    }

    .fs-carousel-wrapper,
    .fs-mistakes-slider-wrapper {
        margin: 30px -20px;
        padding: 0 20px;
    }

    .fs-quick-tips-title {
        font-size: 22px;
    }

    .fs-quick-tip-card {
        padding: 20px 16px;
    }

    .fs-quick-tip-icon {
        width: 44px;
        height: 44px;
        min-width: 44px;
    }
}

/* ============================================
   SIZING COLUMNS - SIZE UP / SIZE DOWN
   ============================================ */
.fs-sizing-columns {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
    margin: 30px 0;
}

@media (max-width: 768px) {
    .fs-sizing-columns {
        grid-template-columns: 1fr;
        gap: 24px;
    }
}

.fs-sizing-column {
    background: white;
    border-radius: var(--fs-radius-lg);
    padding: 32px;
    box-shadow: var(--fs-shadow-md);
    position: relative;
    overflow: hidden;
}

.fs-sizing-column::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
}

.fs-sizing-up::before {
    background: linear-gradient(90deg, #28a745 0%, #20c997 100%);
}

.fs-sizing-down::before {
    background: linear-gradient(90deg, #6f42c1 0%, #e83e8c 100%);
}

.fs-sizing-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 24px;
    padding-bottom: 20px;
    border-bottom: 1px solid #eee;
}

.fs-sizing-icon {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.fs-sizing-up .fs-sizing-icon {
    background: linear-gradient(135deg, #28a745 0%, #20c997 100%);
    box-shadow: 0 4px 12px rgba(40, 167, 69, 0.3);
}

.fs-sizing-down .fs-sizing-icon {
    background: linear-gradient(135deg, #6f42c1 0%, #e83e8c 100%);
    box-shadow: 0 4px 12px rgba(111, 66, 193, 0.3);
}

.fs-sizing-icon svg {
    width: 26px;
    height: 26px;
    stroke: white;
}

.fs-sizing-header h4 {
    font-size: 22px;
    font-weight: 800;
    color: var(--fs-secondary);
    margin: 0;
}

.fs-sizing-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.fs-sizing-list li {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    padding: 14px 0;
    border-bottom: 1px solid #f5f5f5;
    font-size: 15px;
    color: var(--fs-text);
    line-height: 1.5;
}

.fs-sizing-list li:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.fs-check-icon {
    width: 24px;
    height: 24px;
    min-width: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 1px;
}

.fs-sizing-up .fs-check-icon {
    background: linear-gradient(135deg, #d4edda 0%, #c3e6cb 100%);
}

.fs-sizing-up .fs-check-icon svg {
    width: 14px;
    height: 14px;
    stroke: #28a745;
}

.fs-sizing-down .fs-check-icon {
    background: linear-gradient(135deg, #e2d9f3 0%, #f5d0e6 100%);
}

.fs-sizing-down .fs-check-icon svg {
    width: 14px;
    height: 14px;
    stroke: #6f42c1;
}

@media (max-width: 480px) {
    .fs-sizing-column {
        padding: 24px;
    }

    .fs-sizing-header h4 {
        font-size: 18px;
    }

    .fs-sizing-list li {
        font-size: 14px;
        padding: 12px 0;
    }
}

/* ============================================
   UTILITY CLASSES
   ============================================ */
.fs-text-center {
    text-align: center;
}

.fs-mb-30 {
    margin-bottom: 30px;
}

.fs-mt-30 {
    margin-top: 30px;
}

.fs-highlight {
    background: linear-gradient(120deg, #84fab0 0%, #8fd3f4 100%);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 900;
}

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes fs-fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fs-animate {
    animation: fs-fadeInUp 0.6s ease-out;
}

/* ============================================
   PRINT STYLES
   ============================================ */
@media print {
    .fs-hero,
    .fs-cta-section,
    .fs-scroll-indicator {
        background: white;
        color: black;
    }

    .fs-step-card,
    .fs-callout,
    .fs-measurement-card,
    .fs-carousel-card,
    .fs-mistake-slide {
        box-shadow: none;
        border: 1px solid #ddd;
        page-break-inside: avoid;
    }

    .fs-carousel-nav,
    .fs-carousel-dots {
        display: none;
    }

    .fs-carousel-track,
    .fs-mistakes-track {
        display: block;
    }

    .fs-carousel-card,
    .fs-mistake-slide {
        flex: none;
        width: 100%;
        margin-bottom: 20px;
    }
}