:root {
    /* Colors - Refined Dark Theme with Warm Accents */
    --bg-primary: #0a0a0a;
    --bg-secondary: #111111;
    --bg-tertiary: #1a1a1a;
    --text-primary: #F9F7F2;
    --text-secondary: #A8A29E;
    --text-muted: #6B6B6B;
    --accent-blue: #6BA5FF;
    --accent-blue-bright: #3A9AFE;
    --accent-cream: #F9F7F2;
    --accent-warm: #D4C4B0;
    --glass-border: rgba(249, 247, 242, 0.08);
    --glass-bg: rgba(249, 247, 242, 0.02);
    --glass-bg-hover: rgba(249, 247, 242, 0.05);

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 8rem;

    /* Typography */
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-serif: 'Playfair Display', Georgia, 'Times New Roman', serif;

    /* Transitions - Smooth & Elegant */
    --transition-fast: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-smooth: 500ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 800ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-spring: 600ms cubic-bezier(0.34, 1.56, 0.64, 1);

    /* Shadows */
    --shadow-soft: 0 4px 20px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 40px rgba(107, 165, 255, 0.15);
    --shadow-glow-strong: 0 0 60px rgba(107, 165, 255, 0.25);

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-full: 9999px;

    /* Spotlight Variables */
    --mouse-x: 50%;
    --mouse-y: 50%;
    --spotlight-color: rgba(107, 165, 255, 0.12);
}

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

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-main);
    font-weight: 300;
    line-height: 1.7;
    overflow-x: hidden;
    position: relative;
    letter-spacing: 0.01em;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-smooth);
}

ul {
    list-style: none;
}

/* Premium Typography */
h1,
h2,
h3 {
    font-family: var(--font-serif);
    font-weight: 500;
    line-height: 1.15;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

h4,
h5,
h6 {
    font-family: var(--font-main);
    font-weight: 600;
    line-height: 1.3;
    letter-spacing: 0.01em;
}

h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    background: linear-gradient(135deg, var(--accent-cream) 0%, var(--accent-warm) 50%, var(--accent-cream) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: var(--spacing-sm);
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--text-secondary) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

h3 {
    font-size: clamp(1.5rem, 3vw, 2rem);
}

p {
    color: var(--text-secondary);
    font-size: 1.125rem;
    font-weight: 300;
    line-height: 1.8;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Premium Button Styles */
.btn {
    display: inline-block;
    padding: 1rem 2.5rem;
    border-radius: var(--radius-full);
    font-family: var(--font-main);
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    cursor: pointer;
    transition: var(--transition-smooth);
    border: none;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transition: var(--transition-slow);
}

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

.btn-primary {
    background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-blue-bright) 100%);
    color: var(--bg-primary);
    box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-glow-strong);
}

.btn-secondary {
    background-color: transparent;
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background-color: var(--glass-bg-hover);
    border-color: var(--accent-cream);
    transform: translateY(-2px);
}

/* Premium Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes float {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-10px);
    }
}

@keyframes pulse-glow {

    0%,
    100% {
        box-shadow: var(--shadow-glow);
    }

    50% {
        box-shadow: var(--shadow-glow-strong);
    }
}

.fade-in {
    animation: fadeIn 0.8s ease forwards;
}

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(10, 10, 10, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    z-index: 1000;
    padding: 1.25rem 0;
    transition: var(--transition-smooth);
}

.navbar.scrolled {
    background: rgba(10, 10, 10, 0.95);
    padding: 1rem 0;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.nav-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    transition: var(--transition-fast);
}

.logo:hover {
    transform: translateY(-1px);
}

.logo img {
    height: 42px;
    width: auto;
    border-radius: var(--radius-sm);
}

.logo-text {
    color: var(--accent-cream);
    font-family: var(--font-serif);
    font-weight: 500;
    font-size: 1.35rem;
    letter-spacing: 0.02em;
    white-space: nowrap;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--accent-cream);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
    transition: var(--transition-fast);
}

.mobile-menu-btn:hover {
    color: var(--accent-blue);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2.5rem;
}

.nav-links a:not(.btn) {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.8rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    transition: var(--transition-fast);
    white-space: nowrap;
    position: relative;
}

.nav-links a:not(.btn)::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--accent-blue);
    transition: var(--transition-fast);
}

.nav-links a:not(.btn):hover {
    color: var(--accent-cream);
}

.nav-links a:not(.btn):hover::after {
    width: 100%;
}

.nav-btn {
    padding: 0.75rem 1.5rem !important;
    font-size: 0.75rem !important;
}

.nav-cta {
    background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-blue-bright) 100%);
    color: var(--bg-primary) !important;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-full);
    text-decoration: none;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    transition: var(--transition-smooth);
    white-space: nowrap;
    box-shadow: var(--shadow-glow);
}

.nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow-strong);
}

@media (max-width: 768px) {
    .mobile-menu-btn {
        display: block;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: rgba(10, 10, 10, 0.98);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 2rem;
        border-bottom: 1px solid var(--glass-border);
        gap: 1.5rem;
    }

    .nav-links.active {
        display: flex;
    }

    .nav-cta,
    .nav-btn {
        width: 100%;
        text-align: center;
    }
}

.hero-section {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    overflow: hidden;
    padding: 120px var(--spacing-md) 60px;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(ellipse 80% 60% at 50% 30%, rgba(107, 165, 255, 0.08) 0%, transparent 60%),
        radial-gradient(ellipse 60% 40% at 80% 70%, rgba(212, 196, 176, 0.05) 0%, transparent 50%),
        radial-gradient(ellipse 50% 50% at 20% 80%, rgba(107, 165, 255, 0.04) 0%, transparent 40%);
    z-index: 0;
    animation: hero-bg-pulse 8s ease-in-out infinite alternate;
}

@keyframes hero-bg-pulse {
    0% {
        opacity: 0.8;
        transform: scale(1);
    }

    100% {
        opacity: 1;
        transform: scale(1.05);
    }
}

.hero-content {
    z-index: 2;
    max-width: 1000px;
    animation: fadeInUp 1s ease-out;
}

.hero-content h1 {
    margin-bottom: var(--spacing-sm);
}

.subheadline {
    font-size: clamp(1.1rem, 2.5vw, 1.4rem);
    margin: var(--spacing-sm) auto var(--spacing-md);
    color: var(--text-secondary);
    font-weight: 300;
    max-width: 600px;
    line-height: 1.6;
}

.hero-actions {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2.5rem;
    margin-top: 3rem;
    animation: fadeInUp 1s ease-out 0.2s backwards;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
}

.hero-checklist {
    text-align: left;
    background: var(--glass-bg);
    padding: 1.75rem 2.5rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    animation: fadeInUp 1s ease-out 0.4s backwards;
}

.hero-checklist h3 {
    font-family: var(--font-main);
    font-size: 0.75rem;
    margin-bottom: 1rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    font-weight: 600;
}

.hero-checklist ul {
    display: flex;
    gap: 2.5rem;
}

.hero-checklist ul li {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.95rem;
    font-weight: 400;
    color: var(--text-primary);
}

.hero-checklist ul li i {
    color: var(--accent-blue);
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--text-muted);
    font-size: 0.7rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    animation: float 3s ease-in-out infinite;
    z-index: 2;
}

.scroll-indicator::after {
    content: '';
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, var(--text-muted), transparent);
}

.section {
    padding: 6rem 0;
}

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

.mt-sm {
    margin-top: var(--spacing-sm);
}

.text-blue {
    color: var(--accent-blue);
}

.pain-section {
    background-color: var(--bg-primary);
    position: relative;
    overflow: hidden;
    padding-top: 2rem;
}

.pain-header {
    margin-bottom: var(--spacing-lg);
}

.pain-header h2 {
    margin-bottom: var(--spacing-sm);
}

.pain-header .subheadline {
    font-size: 1.15rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.pain-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.pain-item {
    text-align: center;
    padding: var(--spacing-md);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.pain-item:hover {
    transform: translateY(-8px);
    border-color: rgba(107, 165, 255, 0.3);
    box-shadow: var(--shadow-glow);
    background: var(--glass-bg-hover);
}

.icon-glow {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--spacing-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: rgba(107, 165, 255, 0.05);
    box-shadow: 0 0 25px rgba(107, 165, 255, 0.08);
    transition: var(--transition-smooth);
}

.pain-item:hover .icon-glow {
    background: rgba(107, 165, 255, 0.1);
    box-shadow: var(--shadow-glow);
    transform: scale(1.05);
}

.pain-item i {
    font-size: 1.5rem;
    color: var(--text-secondary);
    transition: var(--transition-smooth);
}

.pain-item:hover i {
    color: var(--accent-blue);
}

.pain-item h4 {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin: 0;
    transition: var(--transition-fast);
}

.pain-item:hover h4 {
    color: var(--text-primary);
}

.comparison-container {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: var(--spacing-lg);
    align-items: stretch;
    max-width: 1000px;
    margin: 0 auto;
}

.comparison-block {
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    transition: var(--transition-smooth);
}

.comparison-block h3 {
    font-size: 1.4rem;
    margin-bottom: var(--spacing-md);
}

.comparison-block ul {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.comparison-block ul li {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 1rem;
    color: var(--text-secondary);
    transition: var(--transition-fast);
}

.comparison-block.before {
    background: rgba(255, 80, 80, 0.03);
    border: 1px solid rgba(255, 80, 80, 0.15);
}

.comparison-block.before h3 {
    color: var(--text-secondary);
}

.comparison-block.before i {
    color: #ff6b6b;
}

.comparison-block.after {
    background: rgba(107, 165, 255, 0.05);
    border: 1px solid rgba(107, 165, 255, 0.2);
    position: relative;
}

.comparison-block.after:hover {
    box-shadow: var(--shadow-glow);
}

.comparison-block.after h3 {
    color: var(--text-primary);
}

.comparison-block.after ul li {
    color: var(--text-primary);
    font-weight: 400;
}

.comparison-block.after i {
    color: var(--accent-blue);
    font-size: 1.1rem;
}

/* Steps Section */
.steps-section {
    padding-top: 2rem;
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.step-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    padding: 3rem 2rem;
    border-radius: var(--radius-lg);
    text-align: center;
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.step-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, transparent, var(--accent-blue), transparent);
    opacity: 0;
    transition: var(--transition-smooth);
}

.step-card:hover {
    transform: translateY(-8px);
    border-color: var(--accent-blue);
    background: var(--glass-bg-hover);
    box-shadow: var(--shadow-glow);
}

.step-card:hover::before {
    opacity: 1;
}

.step-number {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-blue-bright) 100%);
    color: var(--bg-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 600;
    margin: 0 auto 1.75rem;
    box-shadow: var(--shadow-glow);
}

.step-card h4 {
    font-size: 1.2rem;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.step-card p {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* Calculator Section - Universal Premium Design */
.calculator-section {
    background: var(--bg-primary);
    padding: var(--spacing-lg) 0;
    border-top: 1px solid var(--glass-border);
}

.calculator-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
    background: var(--bg-secondary);
    padding: 3.5rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow-soft);
}

.harvard-banner {
    background: rgba(255, 230, 0, 0.08);
    border: 1px solid rgba(255, 230, 0, 0.2);
    padding: 1.25rem 1.5rem;
    border-radius: var(--radius-sm);
    margin-bottom: 2.5rem;
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    max-width: 900px;
    margin: 0 auto 2.5rem auto;
    backdrop-filter: blur(10px);
}

.harvard-banner i {
    color: #ffe600;
    margin-top: 4px;
    font-size: 1.1rem;
}

.harvard-banner p {
    color: var(--text-primary);
    font-size: 0.95rem;
    margin: 0;
    line-height: 1.5;
}

.calc-title {
    font-family: var(--font-serif);
    font-size: 1.75rem;
    color: var(--text-primary);
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--glass-border);
}

/* Inputs */
.input-group {
    margin-bottom: 1.75rem;
}

.input-group label {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-secondary);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 0.75rem;
    font-weight: 600;
}

.input-group input:not([type="range"]) {
    width: 100%;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    padding: 1.25rem;
    color: var(--text-primary);
    font-family: var(--font-main);
    font-size: 1.1rem;
    transition: var(--transition-fast);
}

.input-group input:not([type="range"]):focus {
    outline: none;
    border-color: var(--accent-blue);
    background: rgba(255, 255, 255, 0.06);
    box-shadow: 0 0 0 4px rgba(58, 154, 254, 0.1);
}

/* Premium Range Slider */
input[type=range] {
    -webkit-appearance: none;
    width: 100%;
    background: transparent;
    margin: 15px 0;
}

input[type=range]:focus {
    outline: none;
}

/* Webkit Track */
input[type=range]::-webkit-slider-runnable-track {
    width: 100%;
    height: 4px;
    cursor: pointer;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 4px;
    transition: background 0.3s;
}

/* Webkit Thumb */
input[type=range]::-webkit-slider-thumb {
    height: 20px;
    width: 20px;
    border-radius: 50%;
    background: var(--accent-blue);
    border: 2px solid var(--bg-secondary);
    cursor: pointer;
    -webkit-appearance: none;
    margin-top: -8px;
    /* Center thumb on track */
    box-shadow: 0 0 10px rgba(58, 154, 254, 0.5);
    transition: transform 0.2s, box-shadow 0.2s, background 0.2s;
}

input[type=range]:hover::-webkit-slider-thumb {
    background: var(--accent-blue-bright);
    transform: scale(1.1);
}

input[type=range]:focus::-webkit-slider-thumb {
    box-shadow: 0 0 0 6px rgba(58, 154, 254, 0.1);
}

/* Moz Track */
input[type=range]::-moz-range-track {
    width: 100%;
    height: 4px;
    cursor: pointer;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 4px;
}

/* Moz Thumb */
input[type=range]::-moz-range-thumb {
    height: 20px;
    width: 20px;
    border: 2px solid var(--bg-secondary);
    border-radius: 50%;
    background: var(--accent-blue);
    cursor: pointer;
    box-shadow: 0 0 10px rgba(58, 154, 254, 0.5);
}

/* Result Cards */
.result-card {
    padding: 1.5rem 1.75rem;
    border-radius: var(--radius-md);
    margin-bottom: 1.25rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border: 1px solid var(--glass-border);
    transition: transform 0.3s ease;
}

.result-card:hover {
    transform: translateY(-2px);
    border-color: rgba(255, 255, 255, 0.1);
}

.result-card.default {
    background: rgba(255, 255, 255, 0.02);
}

.result-card.highlight-blue {
    background: linear-gradient(90deg, rgba(58, 154, 254, 0.08), transparent);
    border-left: 2px solid var(--accent-blue);
}

.result-card.highlight-blue .value {
    color: var(--accent-blue-bright);
    text-shadow: 0 0 20px rgba(58, 154, 254, 0.3);
}

.result-card.highlight-red {
    background: linear-gradient(90deg, rgba(255, 107, 107, 0.08), transparent);
    border-left: 2px solid #ff6b6b;
}

.result-card.highlight-red .value {
    color: #ff6b6b;
}

.result-card .label {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
}

.result-card .value {
    font-weight: 700;
    font-size: 1.6rem;
    color: var(--text-primary);
    font-family: var(--font-main);
    letter-spacing: -0.02em;
}

.calc-stats {
    margin-top: 2.5rem;
    padding-top: 2rem;
    border-top: 1px solid var(--glass-border);
}

.stat-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 400;
}

.stat-item i {
    color: var(--accent-blue);
    font-size: 1.1rem;
}

.stat-item strong {
    color: var(--text-primary);
    font-weight: 600;
}

.mt-md {
    margin-top: 2.5rem;
}

.btn-block {
    width: 100%;
}

@media (max-width: 900px) {
    .calculator-container {
        grid-template-columns: 1fr;
        gap: 3rem;
        padding: 2.5rem;
    }

    .calc-title {
        text-align: center;
        margin-bottom: 2.5rem;
    }
}

@media (max-width: 600px) {
    .calculator-section {
        padding: 4rem 0;
    }

    .calculator-container {
        padding: 1.5rem;
        gap: 2.5rem;
        background: transparent;
        /* Cleaner look on mobile */
        border: none;
        box-shadow: none;
    }

    .input-group input:not([type="range"]) {
        padding: 1rem;
        font-size: 1rem;
    }

    /* Stack result cards nicely on mobile */
    .result-card {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
        padding: 1.25rem;
        text-align: left;
    }

    .result-card .label {
        font-size: 0.85rem;
        opacity: 0.8;
    }

    .result-card .value {
        font-size: 1.5rem;
        align-self: flex-start;
        /* Align value to start */
    }

    .harvard-banner {
        flex-direction: column;
        align-items: center;
        text-align: center;
        padding: 1.5rem;
    }

    .harvard-banner i {
        font-size: 1.5rem;
        margin-bottom: 0.5rem;
    }
}

.calculator-promo h2 {
    margin-bottom: var(--spacing-md);
}

/* Services Grid */
.services-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    margin-top: 3rem;
}

.service-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2.5rem 1.5rem;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: var(--transition-smooth);
    height: 100%;
    min-height: 180px;
    position: relative;
    overflow: hidden;
}

/* Bento Grid Hover Effect */
.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(600px circle at var(--mouse-x) var(--mouse-y),
            rgba(107, 165, 255, 0.08),
            transparent 40%);
    opacity: 0;
    transition: var(--transition-smooth);
    pointer-events: none;
}

.service-card:hover::before {
    opacity: 1;
}

.service-card:hover {
    border-color: var(--accent-blue);
    transform: translateY(-8px);
    box-shadow: var(--shadow-glow);
    background: var(--glass-bg-hover);
}

/* Calculator Insights & Tables */
.insight-box {
    margin: 2rem 0;
}

.insight-content {
    padding: 1.25rem;
    border-radius: var(--radius-sm);
    display: flex;
    gap: 1rem;
    align-items: flex-start;
    font-size: 0.95rem;
    line-height: 1.6;
}

.insight-content i {
    font-size: 1.25rem;
    margin-top: 0.2rem;
}

.insight-content.success {
    background: rgba(40, 167, 69, 0.1);
    border: 1px solid rgba(40, 167, 69, 0.3);
    color: #2ecc71;
}

.insight-content.warning {
    background: rgba(107, 165, 255, 0.1);
    border: 1px solid rgba(107, 165, 255, 0.3);
    color: var(--accent-blue-bright);
}

.insight-content.caution {
    background: rgba(255, 193, 7, 0.1);
    border: 1px solid rgba(255, 193, 7, 0.3);
    color: #ffc107;
}

.insight-content.critical {
    background: rgba(255, 80, 80, 0.1);
    border: 1px solid rgba(255, 80, 80, 0.3);
    color: #ff6b6b;
}

.breakdown-section h4 {
    color: var(--text-primary);
    font-size: 1.1rem;
    margin-bottom: 1rem;
    font-family: var(--font-serif);
}

.table-responsive {
    overflow-x: auto;
}

.breakdown-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

.breakdown-table th {
    text-align: left;
    padding: 1rem;
    border-bottom: 1px solid var(--glass-border);
    color: var(--text-secondary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-size: 0.8rem;
}

.breakdown-table td {
    padding: 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
    color: var(--text-primary);
}

.breakdown-table tr:last-child td {
    border-bottom: none;
}

.breakdown-table tr.highlight-row {
    background: rgba(107, 165, 255, 0.08);
}

.breakdown-table tr.highlight-row td {
    color: white;
    font-weight: 500;
}

.text-red {
    color: #ff6b6b;
}

.text-green {
    color: #2ecc71;
}

.text-muted {
    color: var(--text-muted);
    font-size: 0.85em;
}

.service-card i {
    font-size: 2.25rem;
    color: var(--text-secondary);
    margin-bottom: 1.25rem;
    transition: var(--transition-smooth);
    z-index: 2;
}

.service-card h4 {
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 500;
    transition: var(--transition-smooth);
    margin: 0;
    z-index: 2;
}

.service-card:hover i {
    color: var(--accent-blue);
    transform: scale(1.1);
}

.service-card:hover h4 {
    color: var(--text-primary);
}

/* Testimonials Section */
.testimonials-section {
    background: var(--bg-secondary);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.testimonial-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    padding: 2.5rem;
    border-radius: var(--radius-lg);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    text-align: left;
    transition: var(--transition-smooth);
    position: relative;
}

.testimonial-card::before {
    content: '"';
    position: absolute;
    top: 1.5rem;
    left: 1.5rem;
    font-family: var(--font-serif);
    font-size: 4rem;
    color: var(--accent-blue);
    opacity: 0.2;
    line-height: 1;
}

.testimonial-card:hover {
    transform: translateY(-5px);
    border-color: rgba(107, 165, 255, 0.3);
    background: var(--glass-bg-hover);
    box-shadow: var(--shadow-soft);
}

.testimonial-card .quote {
    font-size: 1.1rem;
    font-style: italic;
    font-family: var(--font-serif);
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.7;
    padding-top: 1.5rem;
}

.testimonial-card .author-info {
    border-top: 1px solid var(--glass-border);
    padding-top: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.testimonial-card .name {
    color: var(--text-primary);
    font-weight: 600;
    font-size: 1rem;
    margin-bottom: 0.15rem;
}

.testimonial-card .title {
    color: var(--accent-blue);
    font-size: 0.8rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

/* Footer */
.footer {
    background: var(--bg-primary);
    padding: 5rem 0 2rem;
    border-top: 1px solid var(--glass-border);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer-col h3 {
    font-family: var(--font-serif);
    color: var(--text-primary);
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

.footer-col h4 {
    color: var(--text-primary);
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-sm);
}

.footer-col p {
    font-size: 0.95rem;
    line-height: 1.7;
}

.footer-col ul li {
    margin-bottom: 0.75rem;
}

.footer-col ul li a {
    color: var(--text-secondary);
    font-size: 0.95rem;
    transition: var(--transition-fast);
    position: relative;
}

.footer-col ul li a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--accent-blue);
    transition: var(--transition-fast);
}

.footer-col ul li a:hover {
    color: var(--accent-cream);
}

.footer-col ul li a:hover::after {
    width: 100%;
}

.footer-bottom {
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--glass-border);
    color: var(--text-muted);
    font-size: 0.85rem;
}

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

@media (max-width: 768px) {
    .section {
        padding: 4rem 0;
    }

    .hero-section {
        min-height: auto;
        padding: 120px var(--spacing-sm) 80px;
    }

    .hero-checklist {
        padding: 1.25rem 1.5rem;
    }

    .hero-checklist ul {
        flex-direction: column;
        gap: 0.75rem;
    }

    .hero-buttons {
        flex-direction: column;
        width: 100%;
        max-width: 320px;
    }

    .btn {
        width: 100%;
        text-align: center;
        padding: 1rem 1.5rem;
    }

    .scroll-indicator {
        display: none;
    }

    .comparison-container {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .comparison-block.before {
        background: rgba(255, 80, 80, 0.03);
        border: 1px solid rgba(255, 80, 80, 0.12);
    }

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

    .services-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }

    .service-card {
        min-height: 150px;
        padding: 1.75rem 1rem;
    }

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

    .testimonial-card {
        padding: 2rem 1.5rem;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
        text-align: center;
    }

    .footer-col ul li a::after {
        display: none;
    }
}

@media (max-width: 480px) {
    .services-grid {
        grid-template-columns: 1fr;
    }

    .hero-checklist {
        width: 100%;
    }

    .pain-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }

    .pain-item {
        padding: 1.25rem;
    }

    .icon-glow {
        width: 52px;
        height: 52px;
    }
}

/* Global Spotlight Effect */
body::before {
    content: "";
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(600px circle at var(--mouse-x) var(--mouse-y),
            var(--spotlight-color),
            transparent 40%);
    pointer-events: none;
    z-index: 1;
    opacity: 0.6;
}

/* Ensure content is above spotlight */
.navbar,
.hero-content,
.section,
footer {
    position: relative;
    z-index: 2;
}

/* Marquee Section */
.marquee-section {
    padding: 2rem 0;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--glass-border);
    overflow: hidden;
    position: relative;
    z-index: 2;
}

.marquee-container {
    overflow: hidden;
    mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
    -webkit-mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
}

.marquee-content {
    display: flex;
    gap: 4rem;
    width: max-content;
    will-change: transform;
    animation: marquee-scroll var(--marquee-duration, 40s) linear infinite;
}

.marquee-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-secondary);
    white-space: nowrap;
}

.marquee-logo {
    height: 32px;
    width: auto;
    max-width: 120px;
    object-fit: contain;
    filter: grayscale(100%) brightness(0) invert(1);
    /* Make logos white */
    opacity: 0.7;
    transition: opacity 0.3s ease;
}

.marquee-logo:hover {
    opacity: 1;
}

/* Continuous Scroll Keyframes (0 to -50% for duplicated content) */
@keyframes marquee-scroll {
    from {
        transform: translateX(0);
    }

    to {
        transform: translateX(calc(-1 * var(--marquee-shift, 0px)));
    }
}


/* Text Flip Animation */
.flip-container {
    display: inline-block;
    position: relative;
    height: 1.2em;
    /* Adjust based on font size */
    overflow: hidden;
    vertical-align: bottom;
    width: auto;
    min-width: 350px;
    text-align: left;
}

.flip-wrapper {
    position: absolute;
    top: 0;
    left: 0;
    display: flex;
    flex-direction: column;
    transition: transform 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
    /* Bouncy spring effect */
}

.flip-item {
    height: 1.2em;
    display: flex;
    align-items: center;
    color: var(--accent-blue);
    font-weight: 700;
    white-space: nowrap;
}