/* ================================
   CSS Custom Properties (Variables)
   ================================ */
:root {
    /* Colors - Modern vibrant palette */
    --color-primary: #6366f1;
    --color-primary-light: #818cf8;
    --color-primary-dark: #4f46e5;
    --color-secondary: #f472b6;
    --color-accent: #22d3ee;
    --color-accent-alt: #a78bfa;

    /* Neutral colors */
    --color-bg: #0f0f1a;
    --color-bg-elevated: #1a1a2e;
    --color-bg-card: #252542;
    --color-text: #f8fafc;
    --color-text-muted: #94a3b8;
    --color-text-subtle: #64748b;
    --color-border: #334155;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    --gradient-accent: linear-gradient(135deg, var(--color-accent) 0%, var(--color-primary) 100%);
    --gradient-card: linear-gradient(145deg, var(--color-bg-elevated) 0%, var(--color-bg) 100%);

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

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;

    /* Border radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --shadow-glow: 0 0 40px -10px var(--color-primary);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
    --transition-bounce: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);

    /* Container */
    --container-max: 1200px;
    --container-padding: var(--space-lg);
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    overflow-x: hidden;
}

img, picture, video, canvas, svg {
    display: block;
    max-width: 100%;
}

input, button, textarea, select {
    font: inherit;
}

a {
    color: inherit;
    text-decoration: none;
}

ul, ol {
    list-style: none;
}

/* ================================
   Accessibility
   ================================ */
.skip-link {
    position: absolute;
    top: -100%;
    left: var(--space-md);
    background: var(--color-primary);
    color: white;
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-md);
    z-index: 10000;
    transition: top var(--transition-fast);
}

.skip-link:focus {
    top: var(--space-md);
}

/* Focus styles */
:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

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

.section-header {
    text-align: center;
    max-width: 600px;
    margin: 0 auto var(--space-3xl);
}

.section-tag {
    display: inline-block;
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-primary-light);
    margin-bottom: var(--space-md);
}

.section-label {
    font-size: 0.875rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--color-text-muted);
    text-align: center;
    margin-bottom: var(--space-xl);
}

/* ================================
   Typography
   ================================ */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    color: var(--color-text);
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.25rem, 2.5vw, 1.5rem); }

p {
    color: var(--color-text-muted);
}

/* ================================
   Header & Navigation
   ================================ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(15, 15, 26, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    transition: background var(--transition-base);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.logo-text {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
}

.nav-links a {
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--color-text-muted);
    transition: color var(--transition-fast);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width var(--transition-base);
}

.nav-links a:hover {
    color: var(--color-text);
}

.nav-links a:hover::after {
    width: 100%;
}

.mobile-menu-toggle {
    display: none;
    padding: var(--space-sm);
    background: none;
    border: none;
    cursor: pointer;
}

.hamburger {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text);
    position: relative;
    transition: background var(--transition-fast);
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--color-text);
    transition: transform var(--transition-base);
}

.hamburger::before { top: -8px; }
.hamburger::after { bottom: -8px; }

/* Mobile menu */
@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: none;
    }

    .nav-links {
        display: none;
    }
}

/* ================================
   Hero Section
   ================================ */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: calc(72px + var(--space-3xl)) 0 var(--space-3xl);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(ellipse 80% 50% at 50% -20%, rgba(99, 102, 241, 0.15), transparent),
        radial-gradient(ellipse 60% 40% at 100% 50%, rgba(244, 114, 182, 0.1), transparent);
    pointer-events: none;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-greeting {
    font-size: 1.125rem;
    color: var(--color-primary-light);
    font-weight: 500;
    margin-bottom: var(--space-md);
}

.hero-title {
    font-family: var(--font-display);
    font-weight: 700;
    margin-bottom: var(--space-lg);
    line-height: 1.1;
}

.highlight {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.highlight-alt {
    color: var(--color-accent);
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-md);
    max-width: 500px;
}

.hero-bio {
    font-size: 1rem;
    color: var(--color-text-muted);
    line-height: 1.7;
    max-width: 540px;
    margin-bottom: var(--space-sm);
}

.hero-bio:last-of-type {
    margin-bottom: var(--space-xl);
}

.hero-cta {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-md) var(--space-xl);
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.5);
}

.btn-secondary {
    background: transparent;
    color: var(--color-text);
    border: 2px solid var(--color-border);
}

.btn-secondary:hover {
    border-color: var(--color-primary);
    color: var(--color-primary-light);
}

.btn-outline {
    background: transparent;
    color: var(--color-text-muted);
    border: 1px solid var(--color-border);
    display: inline-flex;
    align-items: center;
}

.btn-outline:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.btn-outline svg {
    flex-shrink: 0;
}

/* Hero Visual */
.hero-visual {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-image-container {
    position: relative;
    width: 100%;
    max-width: 450px;
}

.hero-blob {
    width: 100%;
    aspect-ratio: 1;
    background: var(--gradient-primary);
    border-radius: 60% 40% 30% 70% / 60% 30% 70% 40%;
    animation: blob 8s ease-in-out infinite;
    opacity: 0.3;
}

.hero-photo-wrapper {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 70%;
    aspect-ratio: 1;
    border-radius: 50%;
    overflow: hidden;
    border: 4px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3), 0 0 80px rgba(99, 102, 241, 0.2);
}

.hero-photo {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center top;
}

@keyframes blob {
    0%, 100% { border-radius: 60% 40% 30% 70% / 60% 30% 70% 40%; }
    25% { border-radius: 30% 60% 70% 40% / 50% 60% 30% 60%; }
    50% { border-radius: 50% 60% 30% 60% / 30% 60% 70% 40%; }
    75% { border-radius: 60% 40% 60% 30% / 70% 30% 50% 60%; }
}

.hero-stats {
    position: absolute;
    bottom: -5%;
    right: -10%;
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.stat-card {
    background: var(--color-bg-elevated);
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    backdrop-filter: blur(10px);
    animation: float 4s ease-in-out infinite;
}

.stat-card:nth-child(2) {
    animation-delay: -2s;
}

.stat-card-link {
    text-decoration: none;
    color: inherit;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    display: block;
}

.stat-card-link:hover {
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    border-color: var(--color-primary-light);
    animation: none;
    transform: translateY(-4px);
}

.stat-card-link:hover .stat-label {
    color: var(--color-primary-light);
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-suffix {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary-light);
}

.stat-label {
    display: block;
    font-size: 0.75rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Scroll indicator */
.scroll-indicator {
    position: absolute;
    bottom: var(--space-sm);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    color: var(--color-text-subtle);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    animation: bounce 2s ease-in-out infinite;
}

.scroll-arrow {
    width: 24px;
    height: 24px;
    border-right: 2px solid currentColor;
    border-bottom: 2px solid currentColor;
    transform: rotate(45deg);
}

@keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(10px); }
}

/* ================================
   Brands Section
   ================================ */
.brands {
    padding: var(--space-4xl) 0;
    background: var(--color-bg-elevated);
}

.brands-grid {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--space-3xl);
    flex-wrap: wrap;
}

.brand-item {
    opacity: 0.6;
    transition: opacity var(--transition-base);
    filter: grayscale(100%);
}

.brand-item:hover {
    opacity: 1;
    filter: grayscale(0%);
}

/* ================================
   About Section
   ================================ */
.about {
    padding: var(--space-4xl) 0;
    position: relative;
}

.about-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: var(--space-3xl);
    align-items: start;
}

.about-content h2 {
    margin-bottom: var(--space-lg);
}

.about-lead {
    font-size: 1.125rem;
    margin-bottom: var(--space-lg);
    color: var(--color-text);
}

.about-highlights {
    margin-top: var(--space-xl);
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.highlight-item {
    display: flex;
    gap: var(--space-md);
    align-items: flex-start;
}

.highlight-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-card);
    border-radius: var(--radius-md);
    color: var(--color-primary-light);
}

.highlight-item strong {
    display: block;
    margin-bottom: var(--space-xs);
    color: var(--color-text);
}

.highlight-item p {
    font-size: 0.9375rem;
    margin: 0;
}

.about-visual {
    position: sticky;
    top: 100px;
}

.about-card {
    background: var(--gradient-card);
    padding: var(--space-xl);
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-border);
    position: relative;
    overflow: hidden;
}

.card-decoration {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
}

.about-card blockquote {
    font-size: 1.125rem;
    font-style: italic;
    color: var(--color-text);
    margin-bottom: var(--space-md);
    line-height: 1.7;
}

.about-card cite {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    font-style: normal;
}

/* ================================
   Work / Case Studies Section
   ================================ */
.work {
    padding: var(--space-4xl) 0;
    background: var(--color-bg-elevated);
}

.case-studies {
    display: flex;
    flex-direction: column;
    gap: var(--space-2xl);
}

.case-study {
    display: grid;
    grid-template-columns: 0.4fr 1fr;
    gap: var(--space-xl);
    background: var(--color-bg);
    border-radius: var(--radius-xl);
    overflow: hidden;
    border: 1px solid var(--color-border);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.case-study:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.case-study-image {
    position: relative;
    min-height: 300px;
}

.case-study-tag {
    position: absolute;
    top: var(--space-md);
    left: var(--space-md);
    padding: var(--space-xs) var(--space-md);
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: white;
    z-index: 1;
}

.case-study-visual {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.visual-1 { background: linear-gradient(135deg, #10b981 0%, #059669 100%); }
.visual-2 { background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%); }
.visual-3 { background: linear-gradient(135deg, #ec4899 0%, #be185d 100%); }

.visual-icon {
    color: white;
    opacity: 0.8;
}

.case-study-content {
    padding: var(--space-xl);
    display: flex;
    flex-direction: column;
}

.case-study-content h3 {
    margin-bottom: var(--space-md);
    font-size: 1.5rem;
}

.case-study-summary {
    font-size: 1.0625rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-lg);
}

.case-study-details {
    display: none;
    flex-direction: column;
    gap: var(--space-lg);
    margin-bottom: var(--space-lg);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--color-border);
}

.case-study.expanded .case-study-details {
    display: flex;
}

.detail-group h4 {
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-primary-light);
    margin-bottom: var(--space-sm);
}

.detail-group p {
    font-size: 0.9375rem;
}

.detail-group.results {
    background: var(--color-bg-card);
    padding: var(--space-lg);
    border-radius: var(--radius-lg);
}

.result-stat {
    display: flex;
    align-items: baseline;
    gap: var(--space-sm);
    margin-bottom: var(--space-sm);
}

.result-number {
    font-size: 2.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.result-label {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.case-study-toggle {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text-muted);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    align-self: flex-start;
    margin-top: auto;
}

.case-study-toggle:hover {
    border-color: var(--color-primary);
    color: var(--color-primary-light);
}

.case-study-toggle svg {
    transition: transform var(--transition-base);
}

.case-study.expanded .case-study-toggle svg {
    transform: rotate(180deg);
}

.case-study.expanded .case-study-toggle span::before {
    content: 'Hide ';
}

.case-study-list {
    list-style: none;
    padding: 0;
    margin: var(--space-sm) 0 0 0;
}

.case-study-list li {
    position: relative;
    padding-left: 1.5em;
    margin-bottom: var(--space-xs);
    color: var(--color-text-muted);
    font-size: 0.95rem;
    line-height: 1.6;
}

.case-study-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.6em;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--color-primary-light);
}

/* ================================
   Expertise Section
   ================================ */
.expertise {
    padding: var(--space-4xl) 0;
}

.expertise-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
}

.expertise-card {
    background: var(--color-bg-elevated);
    padding: var(--space-xl);
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-border);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.expertise-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-base);
}

.expertise-card:hover {
    transform: translateY(-4px);
    border-color: var(--color-primary);
    box-shadow: var(--shadow-glow);
}

.expertise-card:hover::before {
    transform: scaleX(1);
}

.expertise-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    color: var(--color-primary-light);
    margin-bottom: var(--space-md);
}

.expertise-card h3 {
    margin-bottom: var(--space-sm);
    font-size: 1.125rem;
}

.expertise-card p {
    font-size: 0.9375rem;
}

/* ================================
   Contact Section
   ================================ */
.contact {
    padding: var(--space-4xl) 0;
    background: var(--gradient-primary);
    position: relative;
    overflow: hidden;
}

.contact::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.5;
}

.contact-content {
    position: relative;
    z-index: 1;
    max-width: 600px;
}

.contact .section-tag {
    color: rgba(255, 255, 255, 0.8);
}

.contact h2 {
    color: white;
    margin-bottom: var(--space-md);
}

.contact-content > p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.125rem;
    margin-bottom: var(--space-xl);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
}

.contact-link,
.contact-location {
    display: inline-flex;
    align-items: center;
    gap: var(--space-md);
    color: white;
    font-size: 1.0625rem;
    transition: transform var(--transition-fast);
}

.contact-link:hover {
    transform: translateX(4px);
}

.contact-location {
    color: rgba(255, 255, 255, 0.8);
}

.social-links {
    display: flex;
    gap: var(--space-md);
}

.social-link {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-full);
    color: white;
    transition: all var(--transition-fast);
}

.social-link:hover {
    background: white;
    color: var(--color-primary);
    transform: translateY(-2px);
}

/* ================================
   Footer
   ================================ */
.footer {
    padding: var(--space-xl) 0;
    background: var(--color-bg);
    text-align: center;
}

.footer p {
    font-size: 0.875rem;
    color: var(--color-text-subtle);
}

/* ================================
   Chat Widget
   ================================ */
.chat-widget {
    position: fixed;
    bottom: var(--space-xl);
    right: var(--space-xl);
    z-index: 1000;
}

.chat-toggle {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-full);
    background: var(--gradient-primary);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    box-shadow: 0 4px 20px rgba(99, 102, 241, 0.4);
    transition: all var(--transition-base);
}

.chat-toggle:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 30px rgba(99, 102, 241, 0.5);
}

.chat-toggle .close-icon {
    display: none;
}

.chat-toggle[aria-expanded="true"] .chat-icon {
    display: none;
}

.chat-toggle[aria-expanded="true"] .close-icon {
    display: block;
}

.chat-container {
    position: absolute;
    bottom: 80px;
    right: 0;
    width: 380px;
    max-height: 500px;
    background: var(--color-bg-elevated);
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-xl);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    opacity: 0;
    transform: translateY(20px) scale(0.95);
    transition: opacity 0.3s ease, transform 0.3s ease;
    pointer-events: none;
}

.chat-container.open {
    opacity: 1;
    transform: translateY(0) scale(1);
    pointer-events: auto;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.chat-header {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-lg);
    background: var(--gradient-primary);
    color: white;
}

.chat-avatar {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background: rgba(255, 255, 255, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.125rem;
    overflow: hidden;
    flex-shrink: 0;
}

.chat-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.chat-header-text h3 {
    font-size: 1rem;
    margin-bottom: 2px;
    color: white;
}

.chat-header-text p {
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.8);
    margin: 0;
}

.chat-close {
    margin-left: auto;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    border: none;
    border-radius: var(--radius-full);
    color: white;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.chat-close:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: scale(1.1);
}

.quick-replies {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-top: var(--space-sm);
}

.quick-reply {
    padding: var(--space-xs) var(--space-md);
    background: transparent;
    border: 1px solid var(--color-primary);
    border-radius: var(--radius-full);
    color: var(--color-primary-light);
    font-size: 0.8125rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.quick-reply:hover {
    background: var(--color-primary);
    color: white;
    transform: translateY(-1px);
}

/* Typing cursor for streaming effect */
.chat-message .cursor {
    display: inline;
    animation: blink 0.7s infinite;
    color: var(--color-primary-light);
    font-weight: 300;
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-lg);
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    min-height: 250px;
    max-height: 300px;
}

.chat-message {
    max-width: 85%;
    padding: var(--space-md);
    border-radius: var(--radius-lg);
    font-size: 0.9375rem;
    line-height: 1.5;
}

.chat-message.bot {
    background: var(--color-bg-card);
    color: var(--color-text);
    align-self: flex-start;
    border-bottom-left-radius: var(--radius-sm);
}

.chat-message.user {
    background: var(--gradient-primary);
    color: white;
    align-self: flex-end;
    border-bottom-right-radius: var(--radius-sm);
}

.chat-message p {
    margin: 0;
    color: inherit;
}

.chat-form {
    display: flex;
    gap: var(--space-sm);
    padding: var(--space-md);
    border-top: 1px solid var(--color-border);
    background: var(--color-bg);
}

.chat-input {
    flex: 1;
    padding: var(--space-md);
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    color: var(--color-text);
    font-size: 0.9375rem;
}

.chat-input::placeholder {
    color: var(--color-text-subtle);
}

.chat-input:focus {
    outline: none;
    border-color: var(--color-primary);
}

.chat-send {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border: none;
    border-radius: var(--radius-lg);
    color: white;
    cursor: pointer;
    transition: transform var(--transition-fast);
}

.chat-send:hover {
    transform: scale(1.05);
}

/* Typing indicator */
.typing-indicator {
    display: flex;
    gap: 4px;
    padding: var(--space-md);
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    align-self: flex-start;
    border-bottom-left-radius: var(--radius-sm);
}

.typing-indicator span {
    width: 8px;
    height: 8px;
    background: var(--color-text-subtle);
    border-radius: var(--radius-full);
    animation: typing 1.4s infinite both;
}

.typing-indicator span:nth-child(2) { animation-delay: 0.2s; }
.typing-indicator span:nth-child(3) { animation-delay: 0.4s; }

@keyframes typing {
    0%, 60%, 100% { transform: translateY(0); }
    30% { transform: translateY(-4px); }
}

/* ================================
   Responsive Design
   ================================ */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-subtitle {
        margin: 0 auto var(--space-md);
    }

    .hero-bio {
        margin: 0 auto var(--space-sm);
    }

    .hero-bio:last-of-type {
        margin: 0 auto var(--space-xl);
    }

    .hero-cta {
        justify-content: center;
    }

    .hero-visual {
        display: none;
    }

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

    .about-visual {
        position: static;
    }

    .case-study {
        grid-template-columns: 1fr;
    }

    .case-study-image {
        min-height: 200px;
    }

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

@media (max-width: 768px) {
    :root {
        --container-padding: var(--space-md);
    }

    .hero {
        min-height: auto;
        padding: calc(72px + var(--space-2xl)) 0 var(--space-2xl);
    }

    .scroll-indicator {
        display: none;
    }

    .brands-grid {
        gap: var(--space-xl);
    }

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

    .chat-container {
        width: calc(100vw - var(--space-xl) * 2);
        right: calc(-1 * var(--space-xl) + 60px);
    }
}

@media (max-width: 480px) {
    .hero-cta {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }
}

/* ================================
   Animation on Scroll (AOS) Fallback
   ================================ */
[data-aos] {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-aos].aos-animate {
    opacity: 1;
    transform: translateY(0);
}

/* ================================
   Print Styles
   ================================ */
@media print {
    .header,
    .chat-widget,
    .scroll-indicator {
        display: none;
    }

    body {
        background: white;
        color: black;
    }

    .hero {
        min-height: auto;
        padding: var(--space-xl) 0;
    }
}