/* 
   Adiabatic - Google Cloud Consulting
   Modern, professional stylesheet
*/

/* Base Styles & Reset */
:root {
    /* Primary Colors */
    --primary-color: #4285F4; /* Google Cloud blue */
    --primary-dark: #3367D6;
    --primary-light: #8AB4F8;
    
    /* Secondary Colors */
    --secondary-color: #34A853; /* Google green */
    --accent-color: #FBBC05; /* Google yellow */
    --accent-secondary: #EA4335; /* Google red */
    --accent-color-secondary: #00A09A; /* New accent color */
    
    /* Neutral Colors */
    --dark: #202124;
    --gray-dark: #5F6368;
    --gray-medium: #9AA0A6;
    --gray-light: #DADCE0;
    --light: #F8F9FA;
    --white: #FFFFFF;
    
    /* Dark Mode Colors */
    --dark-bg: #121212;
    --dark-surface: #1E1E1E;
    --dark-border: #333333;
    --dark-text: #E1E1E1;
    --dark-text-secondary: #ABABAB;
    
    /* Typography */
    --heading-font: 'Poppins', sans-serif;
    --body-font: 'Inter', sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 5rem;
    
    /* Border Radius */
    --border-radius-sm: 4px;
    --border-radius-md: 8px;
    --border-radius-lg: 16px;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    
    /* Theme Variables */
    --bg-color: var(--white);
    --text-color: var(--dark);
    --text-color-secondary: var(--gray-dark);
    --border-color: var(--gray-light);
    --card-bg: var(--white);
    --header-bg: var(--white);
    --footer-bg: var(--light);
}

/* Dark Mode Theme */
[data-theme="dark"] {
    --bg-color: var(--dark-bg);
    --text-color: var(--dark-text);
    --text-color-secondary: var(--dark-text-secondary);
    --border-color: var(--dark-border);
    --card-bg: var(--dark-surface);
    --header-bg: var(--dark-surface);
    --footer-bg: var(--dark-surface);
    
    /* Section backgrounds for dark mode */
    --light-section-bg: var(--dark-surface);
    --dark-section-bg: var(--dark-bg);
    --hero-gradient-start: var(--dark-bg);
    --hero-gradient-end: var(--dark-surface);
    --cta-gradient-start: var(--primary-dark);
    --cta-gradient-end: var(--primary-color);
    
    /* Adjust shadow for dark mode */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.3);
}

/* Additions for Animations */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

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

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

body {
    font-family: var(--body-font);
    color: var(--text-color);
    line-height: 1.6;
    background-color: var(--bg-color);
    transition: background-color 0.3s ease, color 0.3s ease;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--heading-font);
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: var(--spacing-md);
    color: var(--text-color);
}

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 2rem;
}

h3 {
    font-size: 1.5rem;
}

h4 {
    font-size: 1.2rem;
}

p {
    margin-bottom: var(--spacing-md);
    color: var(--text-color);
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--primary-dark);
}

img {
    max-width: 100%;
    height: auto;
}

ul {
    list-style: none;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

section {
    padding: var(--spacing-xxl) 0;
}

.section-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto var(--spacing-xl);
}

.section-header h2 {
    margin-bottom: var(--spacing-md);
    position: relative;
    display: inline-block;
}

.section-header h2:after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 50px;
    height: 3px;
    background-color: var(--primary-color);
}

.section-header p {
    color: var(--gray-dark);
    font-size: 1.1rem;
}

/* Utility Classes */
.text-center {
    text-align: center;
}

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

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius-md);
    font-weight: 500;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 1rem;
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--white);
    border: 2px solid var(--primary-color);
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    border-color: var(--primary-dark);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover {
    background-color: var(--primary-light);
    border-color: var(--primary-light);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: var(--header-bg);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    padding: var(--spacing-md) 0;
    transition: all 0.3s ease;
}

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

.logo h1 {
    font-size: 1.8rem;
    margin-bottom: 0;
    color: var(--primary-color);
}

.nav-list {
    display: flex;
    gap: var(--spacing-lg);
}

.nav-list a {
    color: var(--text-color);
    font-weight: 500;
    position: relative;
}

.nav-list a:after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: width 0.3s ease;
}

.nav-list a:hover:after,
.nav-list a.active:after {
    width: 100%;
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.mobile-menu-btn span {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--text-color);
    transition: all 0.3s ease;
}

/* Hero Section */
.hero {
    padding-top: calc(var(--spacing-xxl) + 80px); /* Account for fixed header */
    padding-bottom: var(--spacing-xxl);
    background: linear-gradient(rgba(255, 255, 255, 0.6), rgba(255, 255, 255, 0.6)), url('../images/clouds.jpg'); /* Overlay + Background Image */
    background-size: cover;
    background-position: center bottom; /* Shifted to bottom */
    position: relative;
    overflow: hidden;
    transition: background 0.3s ease;
}

[data-theme="dark"] .hero {
    background: linear-gradient(rgba(18, 18, 18, 0.6), rgba(18, 18, 18, 0.6)), url('../images/clouds.jpg'); /* Dark Overlay + Background Image */
    background-size: cover;
    background-position: center bottom; /* Shifted to bottom */
}

.hero:before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 50%;
    height: 100%;
    background-image: radial-gradient(var(--primary-light) 2px, transparent 2px);
    background-size: 30px 30px;
    opacity: 0.1;
    z-index: 0;
}

.hero-content {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
    position: relative;
    z-index: 1;
}

.hero-text {
    flex: 1;
}

.hero-text h1 {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    color: var(--text-color);
}

.hero-text p {
    font-size: 1.2rem;
    color: var(--text-color-secondary);
    margin-bottom: var(--spacing-lg);
}

.hero-btns {
    display: flex;
    gap: var(--spacing-md);
}

.hero-image {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-image img {
    max-width: 100%;
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-20px);
    }
    100% {
        transform: translateY(0px);
    }
}

.trusted-by {
    margin-top: var(--spacing-xl);
    text-align: center;
}

.trusted-by p {
    color: var(--gray-medium);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: var(--spacing-md);
}

.client-logos {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-xl);
    flex-wrap: wrap;
}

.logo-placeholder {
    width: 120px;
    height: 40px;
    background-color: var(--gray-light);
    border-radius: var(--border-radius-sm);
    opacity: 0.5;
}

/* Services Section */
.services {
    background-color: var(--light);
    transition: background-color 0.3s ease;
}

[data-theme="dark"] .services {
    background-color: var(--dark-surface);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.service-card {
    background-color: var(--card-bg);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.service-icon {
    width: 60px;
    height: 60px;
    background-color: var(--primary-light);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.service-icon i {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.service-card h3 {
    margin-bottom: var(--spacing-sm);
}

.service-card p {
    color: var(--text-color-secondary);
    margin-bottom: 0;
}

/* Why Choose Us Section */
.why-choose-us {
    background-color: var(--white);
    transition: background-color 0.3s ease;
}

[data-theme="dark"] .why-choose-us {
    background-color: var(--dark-bg);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.feature {
    text-align: center;
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    transition: transform 0.3s ease;
}

.feature:hover {
    transform: translateY(-5px);
}

.feature-icon {
    width: 70px;
    height: 70px;
    background-color: var(--light);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 0 auto var(--spacing-md);
}

.feature-icon i {
    font-size: 1.8rem;
    color: var(--accent-color-secondary);
}

.feature h3 {
    margin-bottom: var(--spacing-sm);
}

.feature p {
    color: var(--text-color-secondary);
    margin-bottom: 0;
}

/* Case Studies Section */
.case-studies {
    background-color: var(--light);
    transition: background-color 0.3s ease;
}

[data-theme="dark"] .case-studies {
    background-color: var(--dark-surface);
}

.case-studies-slider {
    max-width: 900px;
    margin: 0 auto;
}

.case-study {
    background-color: var(--white);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.case-study-content {
    padding: var(--spacing-lg);
}

.case-study h3 {
    margin-bottom: var(--spacing-xs);
}

.company {
    color: var(--primary-color);
    font-weight: 500;
    margin-bottom: var(--spacing-md);
}

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

.results {
    display: flex;
    gap: var(--spacing-lg);
}

.result {
    text-align: center;
}

.number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
}

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

/* CTA Section */
.cta {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: var(--white);
    text-align: center;
    transition: background 0.3s ease;
}

[data-theme="dark"] .cta {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--dark-bg) 100%);
}

.cta-content {
    max-width: 800px;
    margin: 0 auto;
}

.cta h2 {
    color: var(--white);
}

.cta p {
    margin-bottom: var(--spacing-lg);
    font-size: 1.2rem;
    opacity: 0.9;
}

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

.cta .btn-primary:hover {
    background-color: transparent;
    color: var(--white);
}

/* Contact Section */
.contact {
    background-color: var(--white);
    transition: background-color 0.3s ease;
}

[data-theme="dark"] .contact {
    background-color: var(--dark-bg);
}

.contact-container {
    display: grid;
    grid-template-columns: 3fr 2fr;
    gap: var(--spacing-xl);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    font-family: var(--body-font);
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.contact-info {
    background-color: var(--light);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
}

.info-item {
    display: flex;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.info-item i {
    width: 40px;
    height: 40px;
    background-color: var(--primary-light);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    color: var(--primary-color);
    margin-right: var(--spacing-md);
}

.info-item p {
    margin-bottom: 0;
}

/* Footer */
.footer {
    background-color: var(--footer-bg);
    color: var(--white);
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--spacing-xl);
}

.footer-logo h2 {
    color: var(--white);
    margin-bottom: var(--spacing-xs);
}

.footer-logo p {
    color: var(--gray-medium);
}

.footer-links {
    display: flex;
    gap: var(--spacing-xl);
}

.link-group h3 {
    color: var(--white);
    font-size: 1.1rem;
    margin-bottom: var(--spacing-md);
}

.link-group ul li {
    margin-bottom: var(--spacing-sm);
}

.link-group a {
    color: var(--gray-medium);
    transition: color 0.3s ease;
}

.link-group a:hover {
    color: var(--primary-light);
}

.footer-bottom {
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-bottom p {
    margin-bottom: 0;
    color: var(--gray-medium);
    font-size: 0.9rem;
}

.footer-legal {
    display: flex;
    gap: var(--spacing-md);
}

.footer-legal a {
    color: var(--gray-medium);
    font-size: 0.9rem;
}

.footer-legal a:hover {
    color: var(--white);
}

/* About Page Styles */
.about-hero {
    padding-top: calc(var(--spacing-xxl) + 80px);
    padding-bottom: var(--spacing-xl);
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: var(--white);
    text-align: center;
    transition: background 0.3s ease;
}

[data-theme="dark"] .about-hero {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--dark-bg) 100%);
}

.about-hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.about-hero h1 {
    font-size: 3.5rem;
    margin-bottom: var(--spacing-sm);
    color: var(--white);
}

.about-hero .subtitle {
    font-size: 1.5rem;
    opacity: 0.9;
}

.about-company {
    background-color: var(--white);
    padding-top: var(--spacing-xl);
    transition: background-color 0.3s ease;
}

[data-theme="dark"] .about-company {
    background-color: var(--dark-bg);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.about-content h2 {
    color: var(--primary-color);
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

.about-content h2:first-child {
    margin-top: 0;
}

.about-content p {
    color: var(--text-color-secondary);
    font-size: 1.1rem;
    margin-bottom: var(--spacing-md);
}

.about-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.rounded-image {
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    max-width: 100%;
}

/* Founder Section */
.founder-section {
    background-color: var(--light);
    padding: var(--spacing-xxl) 0;
    transition: background-color 0.3s ease;
}

[data-theme="dark"] .founder-section {
    background-color: var(--dark-surface);
}

.founder-grid {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-xl);
    align-items: start;
}

.founder-image {
    display: flex;
    justify-content: center;
}

.profile-image-container {
    width: 280px;
    height: 280px;
    border-radius: 50%;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    border: 5px solid var(--white);
}

.profile-image-placeholder {
    width: 100%;
    height: 100%;
    background-color: var(--primary-light);
    display: flex;
    justify-content: center;
    align-items: center;
}

.profile-image-placeholder i {
    font-size: 5rem;
    color: var(--white);
}

.founder-content h2 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-xs);
}

.founder-content h3 {
    font-size: 2.2rem;
    margin-bottom: var(--spacing-xs);
}

.founder-title {
    font-size: 1.2rem;
    color: var(--text-color-secondary);
    margin-bottom: var(--spacing-lg);
}

.experience-highlights {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.experience-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    background-color: var(--white);
    padding: var(--spacing-md);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-sm);
}

.experience-icon {
    width: 50px;
    height: 50px;
    background-color: var(--primary-light);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-shrink: 0;
}

.experience-icon i {
    font-size: 1.2rem;
    color: var(--primary-color);
}

.experience-text h4 {
    margin-bottom: 0;
    color: var(--primary-color);
}

.experience-text p {
    margin-bottom: 0;
    font-size: 0.9rem;
    color: var(--text-color-secondary);
}

.founder-content p {
    margin-bottom: var(--spacing-md);
    font-size: 1.1rem;
}

.founder-cta {
    margin-top: var(--spacing-lg);
}

/* Expertise Section */
.expertise-section {
    background-color: var(--white);
    padding: var(--spacing-xxl) 0;
    transition: background-color 0.3s ease;
}

[data-theme="dark"] .expertise-section {
    background-color: var(--dark-bg);
}

.expertise-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.expertise-card {
    background-color: var(--card-bg);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.expertise-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.expertise-icon {
    width: 60px;
    height: 60px;
    background-color: var(--light);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.expertise-icon i {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.expertise-card h3 {
    margin-bottom: var(--spacing-md);
    color: var(--primary-color);
}

.expertise-list li {
    margin-bottom: var(--spacing-sm);
    position: relative;
    padding-left: var(--spacing-md);
}

.expertise-list li:before {
    content: '';
    position: absolute;
    left: 0;
    top: 10px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background-color: var(--primary-color);
}

/* Approach Section */
.approach-section {
    background-color: var(--light);
    padding: var(--spacing-xxl) 0;
    transition: background-color 0.3s ease;
}

[data-theme="dark"] .approach-section {
    background-color: var(--dark-surface);
}

.approach-steps {
    max-width: 800px;
    margin: 0 auto;
}

.approach-step {
    display: flex;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    position: relative;
}

.approach-step:not(:last-child):after {
    content: '';
    position: absolute;
    top: 50px;
    left: 25px;
    width: 2px;
    height: calc(100% + var(--spacing-lg));
    background-color: var(--primary-light);
}

.step-number {
    width: 50px;
    height: 50px;
    background-color: var(--primary-color);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.5rem;
    font-weight: 600;
    z-index: 1;
    flex-shrink: 0;
}

.step-content {
    background-color: var(--white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    flex-grow: 1;
}

.step-content h3 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.step-content p {
    margin-bottom: 0;
    color: var(--text-color-secondary);
}

/* Speaking Section & Talk Cards */
.speaking-section {
    background-color: var(--white);
    padding: var(--spacing-xxl) 0;
    transition: background-color 0.3s ease;
}

[data-theme="dark"] .speaking-section {
    background-color: var(--dark-bg);
}

.talks-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
    margin-top: var(--spacing-lg);
}

.talk-card {
    background-color: var(--light);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.talk-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.talk-thumbnail {
    position: relative;
    overflow: hidden;
    width: 250px;
    flex-shrink: 0;
}

.talk-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.thumbnail-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.3);
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.thumbnail-overlay i {
    font-size: 3rem;
    color: var(--white);
}

.talk-thumbnail:hover .thumbnail-overlay {
    opacity: 1;
}

.talk-thumbnail:hover .talk-img {
    transform: scale(1.05);
}

.talk-content {
    padding: var(--spacing-lg);
    flex: 1;
}

.talk-content h3 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.talk-description {
    color: var(--text-color-secondary);
    margin-bottom: var(--spacing-md);
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
}

/* Dark Mode Toggle */
.theme-toggle {
    display: flex;
    align-items: center;
    margin-left: var(--spacing-md);
    cursor: pointer;
}

.theme-toggle-track {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 24px;
    background-color: var(--gray-light);
    border-radius: 12px;
    transition: all 0.3s ease;
}

.theme-toggle-thumb {
    position: absolute;
    top: 2px;
    left: 2px;
    width: 20px;
    height: 20px;
    background-color: var(--white);
    border-radius: 50%;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-color);
    font-size: 12px;
}

[data-theme="dark"] .theme-toggle-track {
    background-color: var(--primary-color);
}

[data-theme="dark"] .theme-toggle-thumb {
    left: calc(100% - 22px);
    color: var(--dark);
}

.theme-toggle-icon {
    font-size: 14px;
}

/* Additional Dark Mode Adjustments */
[data-theme="dark"] .logo h1 {
    color: var(--white);
}

[data-theme="dark"] .case-study {
    background-color: var(--dark-surface);
    border: 1px solid var(--dark-border);
}

[data-theme="dark"] .trusted-by {
    border-top: 1px solid var(--dark-border);
}

[data-theme="dark"] .logo-placeholder {
    background-color: var(--dark-border);
}

[data-theme="dark"] .cta {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--dark-bg) 100%);
}

[data-theme="dark"] .footer {
    color: var(--dark-text);
}

[data-theme="dark"] .footer-logo h2,
[data-theme="dark"] .footer-links h3 {
    color: var(--white);
}

[data-theme="dark"] .footer-links a {
    color: var(--dark-text-secondary);
}

[data-theme="dark"] .footer-links a:hover {
    color: var(--primary-light);
}

[data-theme="dark"] .footer-bottom {
    border-top: 1px solid var(--dark-border);
}

[data-theme="dark"] .footer-legal a {
    color: var(--dark-text-secondary);
}

[data-theme="dark"] .mobile-menu-btn span {
    background-color: var(--white);
}

[data-theme="dark"] .talk-card {
    background-color: var(--dark-surface);
    border: 1px solid var(--dark-border);
}

[data-theme="dark"] .talk-meta {
    color: var(--dark-text-secondary);
}

[data-theme="dark"] input,
[data-theme="dark"] textarea {
    background-color: var(--dark-surface);
    color: var(--dark-text);
    border-color: var(--dark-border);
}

[data-theme="dark"] input:focus,
[data-theme="dark"] textarea:focus {
    border-color: var(--primary-color);
}

[data-theme="dark"] label {
    color: var(--dark-text);
}

[data-theme="dark"] .contact-info {
    background-color: var(--dark-surface);
}

[data-theme="dark"] .info-item i {
    color: var(--primary-light);
}

[data-theme="dark"] .info-item p {
    color: var(--dark-text);
}

/* Additional dark mode styles for feature cards and icons */
[data-theme="dark"] .feature-icon,
[data-theme="dark"] .expertise-icon,
[data-theme="dark"] .experience-icon {
    background-color: var(--dark-surface);
    border: 1px solid var(--dark-border);
}

[data-theme="dark"] .feature-icon i,
[data-theme="dark"] .expertise-icon i,
[data-theme="dark"] .experience-icon i {
    color: var(--primary-light);
}

[data-theme="dark"] .service-icon {
    background-color: var(--dark-surface);
}

[data-theme="dark"] .service-icon i {
    color: var(--primary-light);
}

[data-theme="dark"] .experience-item {
    background-color: var(--dark-surface);
    border: 1px solid var(--dark-border);
}

[data-theme="dark"] .step-content {
    background-color: var(--dark-surface);
    border: 1px solid var(--dark-border);
}

[data-theme="dark"] .main-nav {
    background-color: var(--dark-surface);
}

[data-theme="dark"] .profile-image-container {
    border-color: var(--dark-surface);
}

[data-theme="dark"] .section-header p {
    color: var(--dark-text-secondary);
}

[data-theme="dark"] .hero:before {
    opacity: 0.05;
}

/* Media Queries for Dark Mode Toggle */
@media (max-width: 768px) {
    .theme-toggle {
        margin-right: 50px;
    }
}

/* Responsive Styles */
@media (max-width: 992px) {
    html {
        font-size: 15px;
    }
    
    .hero-content {
        flex-direction: column;
    }
    
    .hero-text {
        text-align: center;
    }
    
    .hero-btns {
        justify-content: center;
    }
    
    .contact-container {
        grid-template-columns: 1fr;
    }
    
    .about-grid,
    .founder-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .about-content {
        order: 2;
    }
    
    .about-image {
        order: 1;
        margin-bottom: var(--spacing-lg);
    }
    
    .founder-image {
        margin-bottom: var(--spacing-lg);
    }
}

@media (max-width: 768px) {
    .mobile-menu-btn {
        display: flex;
    }
    
    .main-nav {
        position: fixed;
        top: 70px;
        left: 0;
        width: 100%;
        background-color: var(--white);
        padding: var(--spacing-lg);
        box-shadow: var(--shadow-md);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
    }
    
    .main-nav.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-list {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .footer-content {
        flex-direction: column;
        gap: var(--spacing-lg);
    }
    
    .footer-links {
        flex-direction: column;
        gap: var(--spacing-lg);
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }
    
    .experience-highlights {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 576px) {
    section {
        padding: var(--spacing-xl) 0;
    }
    
    .hero-text h1 {
        font-size: 2.2rem;
    }
    
    .hero-btns {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .services-grid,
    .features-grid,
    .expertise-grid {
        grid-template-columns: 1fr;
    }
    
    .about-hero h1 {
        font-size: 2.5rem;
    }
    
    .founder-content h3 {
        font-size: 1.8rem;
    }
    
    .approach-step {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .approach-step:not(:last-child):after {
        display: none;
    }
    
    .step-number {
        margin: 0 auto;
    }
}