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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #fafafa;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: 1rem 0;
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo h2 {
    color: #2563eb;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.nav-logo span {
    color: #6b7280;
    font-size: 0.875rem;
    font-weight: 500;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    text-decoration: none;
    color: #374151;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-menu a:hover {
    color: #2563eb;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: #2563eb;
    transition: width 0.3s ease;
}

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

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: #374151;
    margin: 3px 0;
    transition: 0.3s;
}

/* Hero Section */
.hero {
    padding: 120px 0 80px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-content h1 {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.highlight {
    color: #fbbf24;
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.hero-content p {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

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

.btn {
    padding: 12px 24px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    display: inline-block;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary {
    background: #fbbf24;
    color: #1f2937;
}

.btn-primary:hover {
    background: #f59e0b;
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(251, 191, 36, 0.3);
}

.btn-secondary {
    background: transparent;
    color: white;
    border: 2px solid white;
}

.btn-secondary:hover {
    background: white;
    color: #1f2937;
    transform: translateY(-2px);
}

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

.brain-icon {
    font-size: 8rem;
    animation: pulse 2s infinite;
}

.thought-bubbles {
    position: absolute;
    width: 100%;
    height: 100%;
}

.bubble {
    position: absolute;
    background: rgba(255, 255, 255, 0.9);
    color: #1f2937;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-weight: 600;
    font-size: 0.875rem;
    animation: float 3s infinite ease-in-out;
}

.bubble:nth-child(1) {
    top: 20%;
    left: 10%;
    animation-delay: 0s;
}

.bubble:nth-child(2) {
    top: 10%;
    right: 20%;
    animation-delay: 0.5s;
}

.bubble:nth-child(3) {
    bottom: 30%;
    left: 5%;
    animation-delay: 1s;
}

.bubble:nth-child(4) {
    bottom: 20%;
    right: 10%;
    animation-delay: 1.5s;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

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

/* Section Styles */
.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 1rem;
    color: #1f2937;
}

.section-subtitle {
    text-align: center;
    font-size: 1.125rem;
    color: #6b7280;
    margin-bottom: 3rem;
}

/* Critical Thinking Section */
.critical-thinking {
    padding: 80px 0;
    background: white;
}

.thinking-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.thinking-card {
    background: white;
    padding: 2rem;
    border-radius: 16px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    border: 1px solid #e5e7eb;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.thinking-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, #2563eb, #7c3aed);
}

.thinking-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.card-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #2563eb, #7c3aed);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.card-icon i {
    font-size: 1.5rem;
    color: white;
}

.thinking-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #1f2937;
}

.thinking-card p {
    color: #6b7280;
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.example {
    background: #f3f4f6;
    padding: 1rem;
    border-radius: 8px;
    border-left: 4px solid #2563eb;
}

.example strong {
    color: #2563eb;
}

/* Problem Solver Section */
.problem-solver {
    padding: 80px 0;
    background: #f8fafc;
}

.scenario-container {
    max-width: 800px;
    margin: 0 auto;
}

.scenario-card {
    background: white;
    padding: 2rem;
    border-radius: 16px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

.scenario-card h3 {
    color: #1f2937;
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.scenario-card > p {
    color: #6b7280;
    margin-bottom: 2rem;
}

.step h4 {
    color: #2563eb;
    margin-bottom: 1rem;
    font-size: 1.25rem;
}

.step-content p {
    margin-bottom: 1rem;
    color: #374151;
}

.options {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.option-btn {
    padding: 1rem;
    border: 2px solid #e5e7eb;
    border-radius: 8px;
    background: white;
    color: #374151;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: left;
    font-size: 1rem;
}

.option-btn:hover {
    border-color: #2563eb;
    background: #eff6ff;
}

.option-btn.correct {
    border-color: #10b981;
    background: #ecfdf5;
    color: #065f46;
}

.option-btn.incorrect {
    border-color: #ef4444;
    background: #fef2f2;
    color: #991b1b;
}

.scenario-feedback {
    background: #ecfdf5;
    border: 1px solid #10b981;
    border-radius: 8px;
    padding: 1.5rem;
    margin-top: 2rem;
}

.scenario-feedback h4 {
    color: #065f46;
    margin-bottom: 1rem;
}

.scenario-feedback ul {
    margin: 1rem 0;
    padding-left: 1.5rem;
}

.scenario-feedback li {
    margin-bottom: 0.5rem;
    color: #065f46;
}

/* Projects Section */
.projects {
    padding: 80px 0;
    background: white;
}

/* Industry Filter */
.industry-filter {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 0.75rem 1.5rem;
    border: 2px solid #e5e7eb;
    background: white;
    color: #6b7280;
    border-radius: 25px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 500;
    font-size: 0.875rem;
}

.filter-btn:hover {
    border-color: #2563eb;
    color: #2563eb;
    transform: translateY(-2px);
}

.filter-btn.active {
    background: #2563eb;
    color: white;
    border-color: #2563eb;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.project-card {
    background: white;
    border: 1px solid #e5e7eb;
    border-radius: 16px;
    overflow: hidden;
    transition: all 0.3s ease;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

.project-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.project-header {
    background: linear-gradient(135deg, #2563eb, #7c3aed);
    color: white;
    padding: 1.5rem;
}

.project-header h3 {
    margin-bottom: 1rem;
    font-size: 1.25rem;
}

.tech-stack {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.tech-tag {
    background: rgba(255, 255, 255, 0.2);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 500;
}

.project-content {
    padding: 1.5rem;
}

.project-content h4 {
    color: #1f2937;
    margin-bottom: 1rem;
    font-size: 1.125rem;
}

.project-content ul {
    margin-bottom: 1.5rem;
    padding-left: 1.5rem;
}

.project-content li {
    margin-bottom: 0.5rem;
    color: #6b7280;
}

.thinking-process {
    background: #f8fafc;
    padding: 1rem;
    border-radius: 8px;
    border-left: 4px solid #2563eb;
}

.thinking-process h5 {
    color: #2563eb;
    margin-bottom: 0.5rem;
    font-size: 1rem;
}

.thinking-process p {
    color: #6b7280;
    font-size: 0.875rem;
}

/* Project Metrics */
.metrics {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 1rem;
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid #e5e7eb;
}

.metric {
    text-align: center;
    padding: 1rem;
    background: #f8fafc;
    border-radius: 8px;
}

.metric-value {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: #2563eb;
    margin-bottom: 0.5rem;
}

.metric-label {
    font-size: 0.875rem;
    color: #6b7280;
    font-weight: 500;
}

/* Case Studies Section */
.case-studies {
    padding: 80px 0;
    background: #f8fafc;
}

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

.case-study {
    background: white;
    border-radius: 16px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    overflow: hidden;
    margin-bottom: 3rem;
}

.case-study-header {
    background: linear-gradient(135deg, #dc2626, #ea580c);
    color: white;
    padding: 2rem;
    text-align: center;
}

.case-study-header h3 {
    font-size: 1.75rem;
    margin-bottom: 1rem;
}

.case-study-tag {
    background: rgba(255, 255, 255, 0.2);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 500;
}

.case-study-content {
    padding: 2rem;
}

.problem-scenario h4,
.analysis-process h4,
.solution-implementation h4,
.results h4 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: #1f2937;
}

.problem-details {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}

.detail-item {
    background: #fef2f2;
    padding: 1rem;
    border-radius: 8px;
    border-left: 4px solid #dc2626;
}

.analysis-steps {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.analysis-step {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}

.step-number {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, #2563eb, #7c3aed);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    flex-shrink: 0;
}

.step-content h5 {
    color: #2563eb;
    margin-bottom: 0.5rem;
    font-size: 1.125rem;
}

.solution-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.solution-item {
    background: #f0f9ff;
    padding: 1.5rem;
    border-radius: 8px;
    border-left: 4px solid #2563eb;
}

.solution-item h5 {
    color: #2563eb;
    margin-bottom: 0.5rem;
    font-size: 1.125rem;
}

.improvement {
    background: #ecfdf5;
    color: #065f46;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-top: 1rem;
    text-align: center;
}

.results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.result-item {
    text-align: center;
    padding: 1.5rem;
    background: #f0fdf4;
    border-radius: 8px;
    border: 2px solid #22c55e;
}

.result-value {
    font-size: 2rem;
    font-weight: 700;
    color: #16a34a;
    margin-bottom: 0.5rem;
}

.result-label {
    font-size: 0.875rem;
    color: #166534;
    font-weight: 500;
}

/* Decision Making Framework Section */
.decision-framework {
    padding: 80px 0;
    background: white;
}

.framework-container {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    margin-top: 3rem;
}

.framework-step {
    display: flex;
    gap: 2rem;
    align-items: flex-start;
    padding: 2rem;
    background: #f8fafc;
    border-radius: 16px;
    border-left: 6px solid #2563eb;
    transition: all 0.3s ease;
}

.framework-step:hover {
    transform: translateX(10px);
    box-shadow: 0 10px 30px rgba(37, 99, 235, 0.1);
}

.step-visual {
    position: relative;
    flex-shrink: 0;
}

.step-icon {
    font-size: 3rem;
    margin-bottom: 0.5rem;
}

.step-number {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #2563eb, #7c3aed);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.25rem;
}

.step-content h3 {
    color: #1f2937;
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.step-content p {
    color: #6b7280;
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.step-examples {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.example-item {
    background: white;
    padding: 0.75rem;
    border-radius: 6px;
    border-left: 3px solid #2563eb;
    font-size: 0.875rem;
}

.example-item strong {
    color: #2563eb;
}

/* Industry Expertise Section */
.industry-expertise {
    padding: 80px 0;
    background: white;
}

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

.expertise-card {
    background: white;
    padding: 2rem;
    border-radius: 16px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    border: 1px solid #e5e7eb;
    transition: all 0.3s ease;
    text-align: center;
}

.expertise-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.expertise-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.expertise-card h3 {
    color: #1f2937;
    margin-bottom: 1rem;
    font-size: 1.25rem;
}

.expertise-card p {
    color: #6b7280;
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.expertise-stats {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.expertise-stats span {
    background: #eff6ff;
    color: #2563eb;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
}

/* Testimonials Section */
.testimonials {
    padding: 80px 0;
    background: #f8fafc;
}

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

.testimonial-card {
    background: white;
    padding: 2rem;
    border-radius: 16px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    border: 1px solid #e5e7eb;
    transition: all 0.3s ease;
}

.testimonial-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.testimonial-content {
    margin-bottom: 1.5rem;
}

.testimonial-content p {
    color: #374151;
    font-style: italic;
    line-height: 1.6;
    font-size: 1.125rem;
}

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

.author-info h4 {
    color: #1f2937;
    margin-bottom: 0.25rem;
    font-size: 1.125rem;
}

.author-info span {
    color: #6b7280;
    font-size: 0.875rem;
}

.author-rating {
    color: #fbbf24;
    font-size: 1rem;
}

/* Skills Section */
.skills {
    padding: 80px 0;
    background: #f8fafc;
}

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

.skills-category h3 {
    color: #1f2937;
    margin-bottom: 1.5rem;
    font-size: 1.25rem;
    text-align: center;
}

.skill-items {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.skill-item {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.skill-name {
    min-width: 120px;
    font-weight: 500;
    color: #374151;
}

.skill-bar {
    flex: 1;
    height: 8px;
    background: #e5e7eb;
    border-radius: 4px;
    overflow: hidden;
}

.skill-progress {
    height: 100%;
    background: linear-gradient(90deg, #2563eb, #7c3aed);
    border-radius: 4px;
    transition: width 1s ease;
}

/* Contact Section */
.contact {
    padding: 80px 0;
    background: white;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    margin-top: 3rem;
}

.contact-info h3,
.contact-form h3 {
    color: #1f2937;
    margin-bottom: 1.5rem;
    font-size: 1.25rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
    color: #6b7280;
}

.contact-item i {
    color: #2563eb;
    width: 20px;
}

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

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    border: 2px solid #e5e7eb;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
    font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #2563eb;
}

/* Footer */
.footer {
    background: #1f2937;
    color: white;
    text-align: center;
    padding: 2rem 0;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 2rem 0;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }
    
    .hero-content h1 {
        font-size: 2.5rem;
    }
    
    .hero-buttons {
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .thinking-grid {
        grid-template-columns: 1fr;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .skills-container {
        grid-template-columns: 1fr;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .brain-icon {
        font-size: 6rem;
    }
    
    .bubble {
        font-size: 0.75rem;
        padding: 0.25rem 0.75rem;
    }
    
    .framework-step {
        flex-direction: column;
        text-align: center;
    }
    
    .case-study-content {
        padding: 1.5rem;
    }
    
    .problem-details {
        grid-template-columns: 1fr;
    }
    
    .solution-grid {
        grid-template-columns: 1fr;
    }
    
    .results-grid {
        grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    }
    
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
    
    .expertise-grid {
        grid-template-columns: 1fr;
    }
    
    .industry-filter {
        gap: 0.5rem;
    }
    
    .filter-btn {
        padding: 0.5rem 1rem;
        font-size: 0.75rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .hero-content h1 {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .thinking-card,
    .project-card,
    .scenario-card {
        padding: 1.5rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 250px;
        text-align: center;
    }
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.thinking-card,
.project-card {
    animation: fadeInUp 0.6s ease forwards;
}

.thinking-card:nth-child(1) { animation-delay: 0.1s; }
.thinking-card:nth-child(2) { animation-delay: 0.2s; }
.thinking-card:nth-child(3) { animation-delay: 0.3s; }
.thinking-card:nth-child(4) { animation-delay: 0.4s; }

/* Smooth scrolling for older browsers */
@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }
    
    .thinking-card,
    .project-card {
        animation: none;
    }
    
    .brain-icon {
        animation: none;
    }
    
    .bubble {
        animation: none;
    }
}