/* ==========================================================================
   Design System & Variables
   ========================================================================== */
   :root {
    /* Colors - Light Theme (Default) */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --bg-glass: rgba(255, 255, 255, 0.7);
    --bg-glass-solid: rgba(255, 255, 255, 0.95);
    
    --text-primary: #0f172a; /* Deep Charcoal */
    --text-secondary: #334155; 
    --text-tertiary: #64748b;
    --text-light: #ffffff;
    
    --accent-primary: #0ea5e9; /* Electric Blue Accent */
    --accent-hover: #0284c7;
    --accent-glow: rgba(14, 165, 233, 0.3);
    
    --navy-dark: #0f172a; /* Deep Navy Baseline */
    --border-color: rgba(15, 23, 42, 0.08);

    --shadow-color: rgba(15, 23, 42, 0.06);
    --glow-color: rgba(14, 165, 233, 0.15);

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    
    /* Layout */
    --container-width: 1200px;
    --section-pad-y: 6rem;

    /* Shadows - Premium Apple/Stripe feel */
    --shadow-sm: 0 1px 2px 0 var(--shadow-color);
    --shadow-md: 0 4px 6px -1px var(--shadow-color), 0 2px 4px -1px var(--shadow-color);
    --shadow-lg: 0 12px 24px -4px var(--shadow-color), 0 4px 12px -4px var(--shadow-color);
    --shadow-glow: 0 0 30px var(--glow-color);

    /* Radii */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 600ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark Theme overrides */
body.dark-theme {
    --bg-primary: #0b1120; /* Intense Dark Navy */
    --bg-secondary: #0f172a;
    --bg-tertiary: #1e293b;
    --bg-glass: rgba(15, 23, 42, 0.7);
    --bg-glass-solid: rgba(15, 23, 42, 0.95);
    
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-tertiary: #94a3b8;
    
    --border-color: rgba(255, 255, 255, 0.1);
    --shadow-color: rgba(0, 0, 0, 0.4);
    --glow-color: rgba(14, 165, 233, 0.25);
}

/* ==========================================================================
   Reset & Base Styles
   ========================================================================== */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-sans);
    color: var(--text-primary);
    background-color: var(--bg-primary);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-sans);
    font-weight: 600;
    line-height: 1.15;
    letter-spacing: -0.03em;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

p {
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
}

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-fast), transform var(--transition-fast);
}

ul {
    list-style: none;
}

/* ==========================================================================
   Utilities
   ========================================================================== */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 1.5rem;
    width: 100%;
}

.relative { position: relative; }
.z-10 { z-index: 10; }
.block { display: block; }
.inline-block { display: inline-block; }
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }
.mx-auto { margin-left: auto; margin-right: auto; }
.max-w-2xl { max-width: 48rem; }
.max-w-sm { max-width: 24rem; }

/* Spacing */
.mt-sm { margin-top: 1rem; }
.mt-md { margin-top: 2rem; }
.mt-lg { margin-top: 3rem; }
.mt-xl { margin-top: 5rem; }
.mb-sm { margin-bottom: 1rem; }
.mb-md { margin-bottom: 2rem; }
.mb-lg { margin-bottom: 3rem; }
.mb-xl { margin-bottom: 5rem; }
.ml-sm { margin-left: 1rem; }
.py-md { padding-top: 2rem; padding-bottom: 2rem; }
.py-lg { padding-top: 4rem; padding-bottom: 4rem; }
.py-xl { padding-top: 6rem; padding-bottom: 6rem; }
.px-lg { padding-left: 3rem; padding-right: 3rem; }
.section-pad { padding: var(--section-pad-y) 0; }

/* Typography utils */
.text-sm { font-size: 0.875rem; }
.text-xl { font-size: 1.5rem; }
.text-display { font-size: clamp(2.5rem, 5vw, 4rem); letter-spacing: -0.04em; }
.text-gradient {
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.text-accent { color: var(--accent-primary); }
.text-tertiary { color: var(--text-tertiary); }
.text-secondary { color: var(--text-secondary); }
.font-medium { font-weight: 500; }
.uppercase { text-transform: uppercase; }
.tracking-wider { letter-spacing: 0.05em; }

/* Backgrounds & Borders */
.subtle-bg { background-color: var(--bg-tertiary); }
.border-y { border-top: 1px solid var(--border-color); border-bottom: 1px solid var(--border-color); }
.border-t { border-top: 1px solid var(--border-color); }
.border-radius-lg { border-radius: var(--radius-lg); }

/* Flex & Grid */
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.flex-end { display: flex; justify-content: flex-end; }
.flex-column { display: flex; flex-direction: column; }
.align-center { align-items: center; }
.align-start { align-items: flex-start; }
.gap-xs { gap: 0.5rem; }
.gap-sm { gap: 1rem; }
.gap-md { gap: 2rem; }
.gap-lg { gap: 3rem; }
.gap-xl { gap: 4rem; }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; }

/* ==========================================================================
   Buttons & Inputs
   ========================================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    font-size: 0.95rem;
    font-weight: 500;
    border-radius: var(--radius-full);
    border: none;
    cursor: pointer;
    transition: all var(--transition-normal);
    text-align: center;
    white-space: nowrap;
    gap: 0.5rem;
}

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

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

.btn-secondary {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background-color: var(--bg-tertiary);
    border-color: var(--text-tertiary);
}

.btn-outline {
    background-color: transparent;
    color: var(--text-primary);
    border: 1px solid var(--text-primary);
}

.btn-outline:hover {
    background-color: var(--text-primary);
    color: var(--bg-primary);
}

.btn-ghost {
    background-color: transparent;
    color: var(--accent-primary);
    padding: 0.5rem 1rem;
}

.btn-ghost:hover {
    background-color: rgba(14, 165, 233, 0.1);
}

.btn-lg { padding: 1rem 2rem; font-size: 1.05rem; }
.btn-xl { padding: 1.25rem 2.5rem; font-size: 1.1rem; }
.btn-sm { padding: 0.5rem 1.25rem; font-size: 0.85rem; }
.btn-block { width: 100%; }

.input-minimal {
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-full);
    border: 1px solid var(--border-color);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    outline: none;
    transition: border-color var(--transition-fast);
}
.input-minimal:focus {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--glow-color);
}

/* ==========================================================================
   Navigation
   ========================================================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background-color: var(--bg-glass);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid transparent;
    transition: all var(--transition-normal);
    padding: 1.25rem 0;
}

.navbar.scrolled {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-color);
    background-color: var(--bg-glass-solid);
}

.nav-container { display: flex; justify-content: space-between; align-items: center; }

.logo {
    display: flex;
    flex-direction: column;
}

.logo-text {
    font-size: 1.2rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

.logo-credentials {
    font-size: 0.7rem;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

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

.nav-link {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.nav-link:hover { color: var(--accent-primary); }

.nav-actions { display: flex; align-items: center; gap: 1rem; }

.theme-toggle {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 1.2rem;
    cursor: pointer;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color var(--transition-fast);
}

.theme-toggle:hover {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

.menu-toggle {
    display: none;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero {
    position: relative;
    padding-top: calc(var(--section-pad-y) + 80px);
    padding-bottom: var(--section-pad-y);
    min-height: 90vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    z-index: 0;
}

.glow-orb {
    position: absolute;
    top: -10%; left: -10%;
    width: 60vh; height: 60vh;
    border-radius: 50%;
    background: radial-gradient(circle, var(--glow-color) 0%, rgba(255,255,255,0) 70%);
    filter: blur(40px);
}
.glow-orb.secondary {
    top: auto; bottom: -20%; right: -10%; left: auto;
    background: radial-gradient(circle, rgba(15,23,42,0.03) 0%, rgba(255,255,255,0) 70%);
}

body.dark-theme .glow-orb.secondary {
    background: radial-gradient(circle, rgba(255,255,255,0.05) 0%, rgba(255,255,255,0) 70%);
}

.grid-overlay {
    position: absolute; inset: 0;
    background-image: linear-gradient(var(--border-color) 1px, transparent 1px), linear-gradient(90deg, var(--border-color) 1px, transparent 1px);
    background-size: 4rem 4rem;
    mask-image: radial-gradient(ellipse 60% 60% at 50% 50%, #000 10%, transparent 100%);
    -webkit-mask-image: radial-gradient(ellipse 60% 60% at 50% 50%, #000 10%, transparent 100%);
    opacity: 0.5;
}

.hero-content {
    max-width: 800px;
}

.badge {
    display: inline-block;
    padding: 0.35rem 1rem;
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 500;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    margin-bottom: 2rem;
    color: var(--text-secondary);
}

.hero-title {
    font-size: clamp(3rem, 5vw, 4.5rem);
    letter-spacing: -0.03em;
    margin-bottom: 1.5rem;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 3rem;
    max-width: 80%;
}

.hero-cta { display: flex; gap: 1rem; }

/* ==========================================================================
   Credibility Section
   ========================================================================== */
.credibility { padding: 3rem 0; }
.credibility-grid {
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
    gap: 2rem;
}
.cred-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}
.cred-value {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}
.cred-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-top: 0.25rem;
}

.logo-carousel-container {
    overflow: hidden;
    width: 100%;
    position: relative;
    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);
}

.carousel-track {
    display: flex;
    width: max-content;
    animation: scroll 30s linear infinite;
}

.carousel-track:hover {
    animation-play-state: paused;
}

.carousel-set {
    display: flex;
    align-items: center;
    justify-content: space-around;
    gap: clamp(3rem, 6vw, 5rem);
    padding-right: clamp(3rem, 6vw, 5rem);
}

.brand-logo {
    height: 40px;
    width: auto;
    max-width: 150px;
    object-fit: contain;
}

@keyframes scroll {
    to {
        transform: translateX(-50%);
    }
}

.opacity-60 { opacity: 0.6; }
.grayscale { filter: grayscale(100%); }
.transition-slow { transition: all 0.5s ease; }
.hover-grayscale-0:hover { filter: grayscale(0%); opacity: 1; }

/* ==========================================================================
   About Section
   ========================================================================== */
.glass-border {
    padding: 1rem;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, rgba(255,255,255,0.4) 0%, rgba(255,255,255,0.1) 100%);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg);
}

body.dark-theme .glass-border {
    background: linear-gradient(135deg, rgba(255,255,255,0.05) 0%, rgba(255,255,255,0) 100%);
}

.headshot-img {
    width: 100%;
    height: auto;
    aspect-ratio: 4/5;
    object-fit: cover;
    border-radius: var(--radius-md);
    display: block;
}

.section-badge {
    display: inline-block;
    color: var(--accent-primary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-size: 0.85rem;
    margin-bottom: 1rem;
}

.section-title { font-size: clamp(2rem, 4vw, 3rem); margin-bottom: 1.5rem; }
.section-desc { font-size: 1.15rem; }

.feature-list li {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
    font-weight: 500;
}

/* ==========================================================================
   Glass Panel & Cards
   ========================================================================== */
.glass-panel {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
    border-radius: var(--radius-lg);
}

body.dark-theme .glass-panel {
    background: var(--bg-secondary);
}

.hover-lift {
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}
.hover-lift:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.service-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    padding: 2.5rem;
    border-radius: var(--radius-lg);
    transition: all var(--transition-normal);
}

body.dark-theme .service-card {
    background: var(--bg-secondary);
}

.service-card:hover {
    border-color: var(--accent-hover);
    box-shadow: var(--shadow-lg);
}

.service-icon {
    width: 56px; height: 56px;
    border-radius: var(--radius-md);
    background-color: var(--bg-tertiary);
    color: var(--accent-primary);
    display: flex; align-items: center; justify-content: center;
    font-size: 1.75rem;
    margin-bottom: 1.5rem;
}

.service-card h3 { font-size: 1.25rem; margin-bottom: 1rem; }
.service-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--accent-primary);
    font-weight: 500;
    margin-top: 1rem;
}
.service-link:hover { gap: 0.75rem; }

/* ==========================================================================
   Case Studies
   ========================================================================== */
.timeline {
    display: flex;
    flex-direction: column;
    gap: 3rem;
}

.case-study-row {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 3rem;
    align-items: center;
}

.case-meta {
    padding-right: 2rem;
}

.case-metric {
    font-size: 2rem;
    line-height: 1.2;
    margin-bottom: 0.5rem;
}

.case-tag {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-tertiary);
    font-weight: 600;
}

.case-body {
    padding: 2.5rem;
}

.story-grid {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-top: 1.5rem;
    color: var(--text-secondary);
}
.story-grid strong { color: var(--text-primary); }

/* ==========================================================================
   Insights
   ========================================================================== */
.insight-card {
    display: flex;
    flex-direction: column;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-normal);
}

body.dark-theme .insight-card { background: var(--bg-secondary); }

.insight-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--text-tertiary);
}

.card-img-placeholder {
    height: 200px;
    background-color: var(--bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-tertiary);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-size: 0.9rem;
}

.card-content { padding: 2rem; }
.card-content .date {
    font-size: 0.85rem;
    color: var(--accent-primary);
    font-weight: 500;
    margin-bottom: 0.5rem;
    display: block;
}
.card-content h4 { font-size: 1.15rem; margin-bottom: 0.75rem; }
.card-content p { margin-bottom: 0; font-size: 0.95rem; }

/* ==========================================================================
   Testimonials
   ========================================================================== */
.testimonial-box {
    padding: 3rem;
    position: relative;
}
.quote-mark {
    font-family: Georgia, serif;
    font-size: 6rem;
    color: var(--border-color);
    position: absolute;
    top: -1rem; left: 1.5rem;
    line-height: 1;
    z-index: 0;
}
.quote-text {
    font-size: 1.1rem;
    font-style: italic;
    color: var(--text-primary);
    position: relative;
    z-index: 1;
    margin-bottom: 2rem;
}
.quote-author {
    display: flex;
    align-items: center;
    gap: 1rem;
}
.author-avatar {
    width: 48px; height: 48px;
    border-radius: 50%;
    background-color: var(--bg-tertiary);
    display: flex; align-items: center; justify-content: center;
    color: var(--text-tertiary);
    font-size: 1.25rem;
}
.quote-author strong { display: block; color: var(--text-primary); }
.quote-author span { font-size: 0.85rem; color: var(--text-secondary); }

/* ==========================================================================
   Final CTA & Footer
   ========================================================================== */
.final-cta { position: relative; overflow: hidden; }
.cta-bg-glow {
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    width: 80%; height: 80%;
    background: radial-gradient(circle, var(--glow-color) 0%, rgba(255,255,255,0) 60%);
    z-index: 0;
}

.shadow-glow { box-shadow: var(--shadow-glow); }

.social-icon {
    width: 40px; height: 40px;
    border-radius: 50%;
    background-color: var(--bg-primary);
    display: flex; align-items: center; justify-content: center;
    font-size: 1.2rem;
    border: 1px solid var(--border-color);
}
.social-icon:hover { color: var(--accent-primary); border-color: var(--accent-primary); }

.sticky-mobile-cta { display: none; }

/* ==========================================================================
   Animations
   ========================================================================== */
.animate-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.animate-up.visible {
    opacity: 1;
    transform: translateY(0);
}

.delay-1 { transition-delay: 150ms; }
.delay-2 { transition-delay: 300ms; }
.delay-3 { transition-delay: 450ms; }
.delay-4 { transition-delay: 600ms; }

/* ==========================================================================
   Responsive Design
   ========================================================================== */
@media (max-width: 992px) {
    .grid-3 { grid-template-columns: repeat(2, 1fr); }
    .case-study-row { grid-template-columns: 1fr; gap: 1.5rem; }
    .case-meta { padding-right: 0; }
    .hero-title { font-size: 3rem; }
}

@media (max-width: 768px) {
    :root {
        --section-pad-y: 4rem;
    }

    .nav-links, .nav-actions .btn { display: none; }
    .menu-toggle { display: block; }
    
    .grid-2, .grid-3 { grid-template-columns: 1fr; }
    
    .hero { min-height: 80vh; text-align: center; }
    .hero-bg { opacity: 0.5; }
    .hero-content { margin: 0 auto; }
    .hero-subtitle { margin: 0 auto 2rem; }
    .hero-cta { justify-content: center; flex-direction: column; }
    
    .credibility-grid { flex-direction: column; gap: 3rem; }
    
    .footer-grid { text-align: center; gap: 2rem; }
    .footer-links.flex-column { align-items: center; }
    .social-links.flex-end { justify-content: center; }
    
    .sticky-mobile-cta {
        display: block;
        position: fixed;
        bottom: 0; left: 0; right: 0;
        padding: 1rem;
        background: var(--bg-glass-solid);
        backdrop-filter: blur(10px);
        border-top: 1px solid var(--border-color);
        z-index: 1000;
        text-align: center;
    }
    
    footer { padding-bottom: calc(var(--section-pad-y) + 80px); }
}