/* ============================================
   MODERN DESIGN ENHANCEMENTS - 2026 EDITION
   ============================================ */

/* Modern CSS Features & Performance */
* {
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    scroll-behavior: smooth;
    contain: layout style paint; /* Performance optimization */
}

/* ============================================
   MODERN COLOR SYSTEM - ENHANCED PALETTE 2026
   ============================================ */
:root {
    /* Enhanced color palette with modern gradients */
    --color-primary-teal: #00B4D8;           /* Bright cyan */
    --color-primary-teal-light: #48CAE4;     /* Light cyan */
    --color-primary-teal-dark: #0077B6;      /* Deep blue-cyan */
    --color-primary-dark: #0A2463;           /* Navy blue */
    --color-primary-dark-light: #1E3A8A;     /* Lighter navy */
    --color-accent-gold: #FFD700;            /* Gold accent */
    --color-accent-gold-light: #FFE55C;      /* Light gold */
    --color-neutral-white: #FFFFFF;          /* Pure white */
    --color-neutral-gray: #F8FAFC;           /* Very light gray */
    --color-neutral-charcoal: #334155;      /* Dark slate */
    --color-neutral-medium: #64748B;         /* Medium gray */
    --color-neutral-light: #E2E8F0;          /* Light gray */
    --color-success: #10B981;                /* Emerald green */
    --color-warning: #F59E0B;                /* Amber */
    --color-error: #EF4444;                  /* Red */
    --color-info: #3B82F6;                   /* Blue */
    --color-glass-bg: rgba(255, 255, 255, 0.85); /* Glassmorphism background */
    --color-glass-border: rgba(255, 255, 255, 0.2); /* Glassmorphism border */
    --color-gradient-primary: linear-gradient(135deg, #00B4D8 0%, #0077B6 100%);
    --color-gradient-secondary: linear-gradient(135deg, #0A2463 0%, #1E3A8A 100%);
    --color-gradient-accent: linear-gradient(135deg, #FFD700 0%, #FFE55C 100%);
}

/* ============================================
   SPACING SCALE (8px base unit)
   ============================================ */
:root {
    --spacing-base-8: 0.5rem;     /* 8px */
    --spacing-base-16: 1rem;      /* 16px */
    --spacing-base-24: 1.5rem;    /* 24px */
    --spacing-base-32: 2rem;      /* 32px */
    --spacing-base-40: 2.5rem;    /* 40px */
    --spacing-base-48: 3rem;      /* 48px */
    --spacing-base-64: 4rem;      /* 64px */
    --spacing-base-80: 5rem;      /* 80px */
    --spacing-base-96: 6rem;      /* 96px */
    --spacing-base-120: 7.5rem;   /* 120px */
    
    /* Section spacing */
    --section-spacing-vertical: 5rem;    /* 80px between major sections */
    --section-spacing-horizontal: 2rem;  /* 32px internal padding */
    
    /* Grid configuration */
    --grid-columns: 12;
    --grid-gap: 1.5rem;  /* 24px gap between columns */
    --container-max: 1440px;
    --container-padding: 2rem; /* 32px on sides */
}

/* ============================================
   TYPOGRAPHIC SCALE - REFINED HIERARCHY
   ============================================ */

/* H1 - Main Headlines */
h1 {
    font-size: var(--fs-h1);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.02em;
    color: var(--color-primary-dark);
    margin-bottom: var(--spacing-base-24);
}

/* H2 - Section Titles */
h2 {
    font-size: var(--fs-h2);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.01em;
    color: var(--color-primary-dark);
    margin-bottom: var(--spacing-base-32);
}

/* H3 - Subsection Titles / Card Headings */
h3 {
    font-size: var(--fs-h3);
    font-weight: 600;
    line-height: 1.3;
    color: var(--color-primary-dark);
    margin-bottom: var(--spacing-base-16);
}

/* H4 - Component Labels */
h4 {
    font-size: var(--fs-h4);
    font-weight: 600;
    line-height: 1.4;
    color: var(--color-primary-dark);
    margin-bottom: var(--spacing-base-12);
}

/* Body Text - Improved readability */
p, li, label {
    font-size: var(--fs-body);
    line-height: 1.7;
    letter-spacing: 0.3px;
    color: var(--color-neutral-charcoal);
}

/* Paragraph spacing */
p + p {
    margin-top: var(--spacing-base-16);
}

/* Small text */
small, .small {
    font-size: var(--fs-small);
    line-height: 1.5;
}

/* ============================================
   12-COLUMN GRID SYSTEM
   ============================================ */

.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.grid {
    display: grid;
    grid-template-columns: repeat(var(--grid-columns), 1fr);
    gap: var(--grid-gap);
}

/* Grid column utilities */
.col-1  { grid-column: span 1; }
.col-2  { grid-column: span 2; }
.col-3  { grid-column: span 3; }
.col-4  { grid-column: span 4; }
.col-5  { grid-column: span 5; }
.col-6  { grid-column: span 6; }
.col-7  { grid-column: span 7; }
.col-8  { grid-column: span 8; }
.col-9  { grid-column: span 9; }
.col-10 { grid-column: span 10; }
.col-11 { grid-column: span 11; }
.col-12 { grid-column: span 12; }

/* ============================================
   SECTION LAYOUTS - CONSISTENT ALIGNMENT
   ============================================ */

section {
    padding: var(--section-spacing-vertical) var(--section-spacing-horizontal);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-base-80);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.section-header h2 {
    margin-bottom: var(--spacing-base-24);
}

.section-header p {
    font-size: 1.125rem;
    color: var(--color-neutral-charcoal);
    line-height: 1.7;
}

/* ============================================
   SCROLL-TRIGGERED ANIMATIONS - MODERN 2026
   ============================================ */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
    will-change: opacity, transform;
}

.animate-on-scroll.animate-in {
    opacity: 1;
    transform: translateY(0);
}

.animate-on-scroll-left {
    opacity: 0;
    transform: translateX(-30px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
    will-change: opacity, transform;
}

.animate-on-scroll-left.animate-in {
    opacity: 1;
    transform: translateX(0);
}

.animate-on-scroll-right {
    opacity: 0;
    transform: translateX(30px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
    will-change: opacity, transform;
}

.animate-on-scroll-right.animate-in {
    opacity: 1;
    transform: translateX(0);
}

.animate-fade-in {
    opacity: 0;
    transition: opacity 1s cubic-bezier(0.4, 0, 0.2, 1);
    will-change: opacity;
}

.animate-fade-in.animate-in {
    opacity: 1;
}

.animate-scale-in {
    opacity: 0;
    transform: scale(0.9);
    transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    will-change: opacity, transform;
}

.animate-scale-in.animate-in {
    opacity: 1;
    transform: scale(1);
}

/* ============================================
   MODERN LOADING STATES - SKELETON SCREENS
   ============================================ */
.skeleton {
    background: linear-gradient(90deg, var(--color-neutral-light) 25%, var(--color-neutral-gray) 50%, var(--color-neutral-light) 75%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s infinite;
    border-radius: 8px;
    position: relative;
    overflow: hidden;
}

.skeleton::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    animation: skeleton-shine 1.5s infinite;
}

.skeleton-text {
    height: 1.2em;
    margin-bottom: 0.5em;
}

.skeleton-text:last-child {
    width: 60%;
}

.skeleton-card {
    padding: var(--spacing-base-32);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-base-24);
}

.skeleton-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    flex-shrink: 0;
}

.skeleton-button {
    height: 48px;
    border-radius: var(--radius-md);
    width: 120px;
}

/* Loading animations */
@keyframes skeleton-loading {
    0% {
        background-position: -200% 0;
    }
    100% {
        background-position: 200% 0;
    }
}

@keyframes skeleton-shine {
    0% {
        left: -100%;
    }
    100% {
        left: 100%;
    }
}
.form-input {
    width: 100%;
    padding: 1rem 1.25rem;
    border: 2px solid var(--color-neutral-light);
    border-radius: 12px;
    font-size: 1rem;
    font-family: inherit;
    background: var(--color-neutral-white);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    z-index: 1;
    min-height: 48px; /* Accessible touch target */
    box-sizing: border-box;
}

.form-input:focus {
    outline: none;
    border-color: var(--color-primary-teal);
    box-shadow: 0 0 0 4px rgba(0, 180, 216, 0.1), 0 4px 12px rgba(0, 180, 216, 0.15);
    transform: translateY(-2px);
    background: var(--color-neutral-white);
    animation: input-focus 0.3s ease-out;
}

.form-input::placeholder {
    color: var(--color-neutral-medium);
    opacity: 0.7;
    transition: opacity 0.2s ease;
}

.form-input:focus::placeholder {
    opacity: 0.5;
    transform: translateX(4px);
}

.form-textarea {
    min-height: 120px;
    resize: vertical;
    line-height: 1.6;
}

.form-group {
    margin-bottom: 1.5rem;
    position: relative;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--color-neutral-charcoal);
    font-size: 0.875rem;
    letter-spacing: 0.025em;
    transition: color 0.2s ease;
}

.form-input:focus + .form-label,
.form-label:focus-within {
    color: var(--color-primary-teal);
}

/* Form animations */
@keyframes input-focus {
    0% {
        transform: translateY(0);
        box-shadow: 0 0 0 0 rgba(0, 180, 216, 0.1);
    }
    50% {
        transform: translateY(-3px);
        box-shadow: 0 0 0 6px rgba(0, 180, 216, 0.15);
    }
    100% {
        transform: translateY(-2px);
        box-shadow: 0 0 0 4px rgba(0, 180, 216, 0.1), 0 4px 12px rgba(0, 180, 216, 0.15);
    }
}
.gradient-hero {
    background: var(--color-gradient-primary);
    background-attachment: fixed;
    position: relative;
    overflow: hidden;
}

.gradient-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 20% 80%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 80% 20%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
    animation: gradient-shift 20s ease-in-out infinite alternate;
    z-index: 1;
}

.gradient-secondary {
    background: var(--color-gradient-secondary);
    position: relative;
}

.gradient-accent {
    background: var(--color-gradient-accent);
    position: relative;
}

.gradient-subtle {
    background: linear-gradient(135deg, rgba(0, 180, 216, 0.05) 0%, rgba(10, 36, 99, 0.05) 100%);
    position: relative;
}

/* Gradient animations */
@keyframes gradient-shift {
    0% {
        transform: translateX(-10px) translateY(-10px) scale(1);
        opacity: 0.8;
    }
    100% {
        transform: translateX(10px) translateY(10px) scale(1.1);
        opacity: 1;
    }
}
.glass-card {
    background: var(--color-glass-bg);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid var(--color-glass-border);
    border-radius: 16px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1), 0 1px 0 rgba(255, 255, 255, 0.2) inset;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    z-index: 1;
    transform: translateZ(0); /* Hardware acceleration */
    will-change: transform, box-shadow, backdrop-filter;
    contain: layout style paint; /* Performance optimization */
}

.glass-card:hover {
    backdrop-filter: blur(25px) saturate(200%);
    -webkit-backdrop-filter: blur(25px) saturate(200%);
    box-shadow: 0 12px 48px rgba(0, 0, 0, 0.15), 0 1px 0 rgba(255, 255, 255, 0.3) inset, 0 0 0 1px rgba(255, 255, 255, 0.1) inset;
    transform: translateY(-8px) scale(1.02) translateZ(0);
    border-color: rgba(255, 255, 255, 0.3);
    z-index: 2;
    animation: glass-glow 0.3s ease-out forwards;
}

/* Glassmorphism animations */
@keyframes glass-glow {
    0% {
        box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1), 0 1px 0 rgba(255, 255, 255, 0.2) inset;
    }
    100% {
        box-shadow: 0 12px 48px rgba(0, 0, 0, 0.15), 0 1px 0 rgba(255, 255, 255, 0.3) inset, 0 0 0 1px rgba(255, 255, 255, 0.1) inset;
    }
}

.card {
    background: var(--color-glass-bg);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid var(--color-glass-border);
    border-radius: 16px;
    padding: var(--spacing-base-32);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1), 0 1px 0 rgba(255, 255, 255, 0.2) inset;
    position: relative;
    overflow: hidden;
    z-index: 1;
    transform: translateZ(0);
    will-change: transform, box-shadow, backdrop-filter;
    contain: layout style paint;
}

.card:hover {
    backdrop-filter: blur(25px) saturate(200%);
    -webkit-backdrop-filter: blur(25px) saturate(200%);
    box-shadow: 0 12px 48px rgba(0, 0, 0, 0.15), 0 1px 0 rgba(255, 255, 255, 0.3) inset, 0 0 0 1px rgba(255, 255, 255, 0.1) inset;
    transform: translateY(-8px) scale(1.02) translateZ(0);
    border-color: rgba(255, 255, 255, 0.3);
    z-index: 2;
    animation: glass-glow 0.3s ease-out forwards;
}

/* Problem/feature card */
.problem-card, .feature-card {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-base-16);
}

.problem-card h3, .feature-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
}

/* ============================================
   BUTTON & CTA STYLING - ENHANCED PROMINENCE
   ============================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-base-8);
    padding: 0.875rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    text-decoration: none;
    cursor: pointer;
    border: 2px solid transparent;
    min-height: 48px; /* Accessible touch target */
}

.btn-primary {
    background: var(--color-gradient-primary);
    color: var(--color-neutral-white);
    box-shadow: 0 4px 12px rgba(0, 180, 216, 0.3);
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s ease;
    z-index: -1;
}

.btn-primary:hover {
    background: var(--color-gradient-primary);
    box-shadow: 0 8px 24px rgba(0, 180, 216, 0.4);
    transform: translateY(-3px) scale(1.02);
    animation: btn-pulse 0.6s ease-out;
}

.btn-primary:hover::before {
    left: 100%;
}

.btn-primary:hover::before {
    left: 100%;
}

.btn-secondary {
    background: var(--color-gradient-secondary);
    color: var(--color-neutral-white);
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
}

.btn-secondary::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.btn-secondary:hover {
    background: var(--color-gradient-secondary);
    box-shadow: 0 6px 20px rgba(10, 36, 99, 0.3);
    transform: translateY(-2px) scale(1.01);
    border-color: rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover::before {
    opacity: 1;
}

/* Button animations */
@keyframes btn-pulse {
    0% {
        box-shadow: 0 4px 12px rgba(0, 180, 216, 0.3);
    }
    50% {
        box-shadow: 0 8px 24px rgba(0, 180, 216, 0.5), 0 0 0 4px rgba(0, 180, 216, 0.1);
    }
    100% {
        box-shadow: 0 8px 24px rgba(0, 180, 216, 0.4);
    }
}

.btn-text {
    background: transparent;
    color: var(--color-primary-teal);
    font-weight: 600;
    padding: 0;
}

.btn-text:hover {
    color: #00A8C8;
}

/* ============================================
   HERO SECTION - IMPROVED HIERARCHY
   ============================================ */

.hero {
    position: relative;
    padding: var(--spacing-base-120) var(--section-spacing-horizontal) var(--spacing-base-80);
    background: linear-gradient(135deg, rgba(10, 36, 99, 0.02) 0%, rgba(0, 180, 216, 0.03) 100%);
    overflow: hidden;
}

.hero-overline {
    font-size: 0.875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--color-primary-teal);
    margin-bottom: var(--spacing-base-16);
    display: block;
}

.hero-title {
    margin-bottom: var(--spacing-base-32);
    max-width: 900px;
    line-height: 1.15;
}

.hero-subtitle {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--color-neutral-charcoal);
    max-width: 700px;
    margin-bottom: var(--spacing-base-40);
}

.hero-cta-group {
    display: flex;
    gap: var(--spacing-base-16);
    margin-bottom: var(--spacing-base-80);
    flex-wrap: wrap;
}

.trust-bar {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-base-32);
    padding-top: var(--spacing-base-40);
    border-top: 2px solid rgba(0, 180, 216, 0.2);
}

.trust-stat {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--color-primary-teal);
    line-height: 1;
    margin-bottom: var(--spacing-base-8);
}

.stat-label {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-neutral-charcoal);
    line-height: 1.4;
}

/* ============================================
   ROI CALCULATOR - PROMINENT DESIGN
   ============================================ */

.roi-card {
    background: linear-gradient(135deg, #FFFFFF 0%, #F0F9FB 100%);
    border: 2px solid var(--color-primary-teal);
    padding: var(--spacing-base-40);
    border-radius: var(--radius-lg);
    max-width: 520px;
    margin: var(--spacing-base-80) auto;
    box-shadow: 0 8px 32px rgba(0, 180, 216, 0.15);
}

.roi-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary-dark);
    margin-bottom: var(--spacing-base-24);
}

.roi-row {
    margin-bottom: var(--spacing-base-24);
}

.roi-row label {
    display: block;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--color-neutral-charcoal);
    margin-bottom: var(--spacing-base-8);
}

.roi-row input[type="range"] {
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: #E0E0E0;
    outline: none;
    -webkit-appearance: none;
}

.roi-row input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--color-primary-teal);
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(0, 180, 216, 0.4);
}

.roi-row input[type="number"] {
    width: 100%;
    padding: var(--spacing-base-12) var(--spacing-base-16);
    border: 1px solid #D8D8D8;
    border-radius: var(--radius-sm);
    font-size: 1rem;
}

.roi-results {
    background: rgba(0, 180, 216, 0.08);
    padding: var(--spacing-base-32);
    border-radius: var(--radius-md);
    text-align: center;
    border-left: 4px solid var(--color-primary-teal);
}

.roi-amount {
    font-size: 2.25rem;
    font-weight: 800;
    color: var(--color-primary-teal);
    margin: var(--spacing-base-12) 0;
}

.roi-hours {
    font-size: 1rem;
    color: var(--color-neutral-charcoal);
    font-weight: 500;
}

/* ============================================
   RESPONSIVE DESIGN - BREAKPOINTS
   ============================================ */

/* Tablet: 768px */
@media (max-width: 768px) {
    :root {
        --section-spacing-vertical: 3rem;    /* 48px */
        --container-padding: 1.5rem;        /* 24px */
        --grid-gap: 1rem;                   /* 16px */
    }
    
    h1 { margin-bottom: var(--spacing-base-16); }
    h2 { margin-bottom: var(--spacing-base-24); }
    
    .hero {
        padding: var(--spacing-base-64) var(--section-spacing-horizontal) var(--spacing-base-48);
    }
    
    .hero-cta-group {
        flex-direction: column;
    }
    
    .trust-bar {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
        gap: var(--spacing-base-24);
    }
    
    .grid {
        gap: var(--grid-gap);
    }
    
    .col-6 { grid-column: span 12; }
    
    .roi-card {
        padding: var(--spacing-base-32);
        margin: var(--spacing-base-48) auto;
    }
    
    .card {
        padding: var(--spacing-base-24);
    }
}

/* Mobile: 375px - 599px */
@media (max-width: 599px) {
    :root {
        --section-spacing-vertical: 2rem;   /* 32px */
        --container-padding: 1rem;          /* 16px */
        --grid-gap: 0.75rem;                /* 12px */
    }
    
    section {
        padding: var(--section-spacing-vertical) var(--section-spacing-horizontal);
    }
    
    h1 {
        font-size: 1.75rem;
        margin-bottom: var(--spacing-base-16);
        line-height: 1.2;
    }
    
    h2 {
        font-size: 1.5rem;
        margin-bottom: var(--spacing-base-16);
    }
    
    h3 {
        font-size: 1.125rem;
    }
    
    p, li {
        font-size: 0.95rem;
        line-height: 1.6;
    }
    
    .hero {
        padding: var(--spacing-base-48) var(--section-spacing-horizontal) var(--spacing-base-32);
    }
    
    .hero-subtitle {
        font-size: 1rem;
        margin-bottom: var(--spacing-base-24);
    }
    
    .hero-cta-group {
        flex-direction: column;
        gap: var(--spacing-base-12);
        margin-bottom: var(--spacing-base-40);
    }
    
    .btn {
        width: 100%;
        padding: 0.75rem 1.5rem;
        min-height: 44px;
    }
    
    .trust-bar {
        grid-template-columns: 1fr;
        gap: var(--spacing-base-16);
        padding-top: var(--spacing-base-24);
        border-top: 1px solid rgba(0, 180, 216, 0.2);
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .section-header {
        margin-bottom: var(--spacing-base-40);
    }
    
    .roi-card {
        padding: var(--spacing-base-24);
        margin: var(--spacing-base-40) auto;
        border-radius: var(--radius-md);
    }
    
    .roi-title {
        font-size: 1.25rem;
        margin-bottom: var(--spacing-base-16);
    }
    
    .roi-row {
        margin-bottom: var(--spacing-base-16);
    }
    
    .card {
        padding: var(--spacing-base-16);
    }
    
    .problem-card h3,
    .feature-card h3 {
        font-size: 1.125rem;
    }
    
    .grid {
        grid-template-columns: 1fr;
    }
    
    .col-3, .col-4, .col-6 {
        grid-column: span 12;
    }
}

/* ============================================
   ACCESSIBILITY - TEXT CONTRAST & FOCUS
   ============================================ */

/* Ensure minimum 4.5:1 contrast ratio */
.btn, a, button {
    outline: 2px solid transparent;
    outline-offset: 2px;
}

.btn:focus-visible, a:focus-visible, button:focus-visible {
    outline: 2px solid var(--color-primary-teal);
    outline-offset: 2px;
}

/* ============================================
   UTILITY CLASSES
   ============================================ */

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.mt-16 { margin-top: var(--spacing-base-16); }
.mb-16 { margin-bottom: var(--spacing-base-16); }
.mt-24 { margin-top: var(--spacing-base-24); }
.mb-24 { margin-bottom: var(--spacing-base-24); }
.mt-32 { margin-top: var(--spacing-base-32); }
.mb-32 { margin-bottom: var(--spacing-base-32); }

.mt-40 { margin-top: var(--spacing-base-40); }
.mb-40 { margin-bottom: var(--spacing-base-40); }
.mt-48 { margin-top: var(--spacing-base-48); }
.mb-48 { margin-bottom: var(--spacing-base-48); }
.mt-64 { margin-top: var(--spacing-base-64); }
.mb-64 { margin-bottom: var(--spacing-base-64); }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.gap-16 { gap: var(--spacing-base-16); }
.gap-24 { gap: var(--spacing-base-24); }

.align-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }

/* Print styles */
@media print {
    section { page-break-inside: avoid; }
    .btn { display: none; }
}