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

:root {
    --kiro-purple: #6366f1;
    --kiro-purple-dark: #4f46e5;
    --kiro-purple-light: #8b5cf6;
    --accent-cyan: #06b6d4;
    --accent-green: #10b981;
    --accent-orange: #f59e0b;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-light: #94a3b8;
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-dark: #0f172a;
    --bg-card: #ffffff;
    --border-color: #e2e8f0;
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    --gradient-accent: linear-gradient(135deg, #06b6d4 0%, #10b981 100%);
}

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    overflow-x: hidden;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Modern Glassmorphism Effect */
.glass {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

/* Navigation - Modern Floating Style */
.navbar {
    position: fixed;
    top: 1rem;
    left: 50%;
    transform: translateX(-50%);
    width: calc(100% - 4rem);
    max-width: 1200px;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(20px);
    border-radius: 1rem;
    border: 1px solid rgba(99, 102, 241, 0.1);
    z-index: 1000;
    transition: all 0.3s ease;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}

.nav-container {
    max-width: 100%;
    margin: 0;
    padding: 0.75rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: auto;
}

.nav-logo h2 {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
    font-size: 1.25rem;
    letter-spacing: -0.02em;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.9rem;
    transition: all 0.3s ease;
    position: relative;
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
}

.nav-link:hover {
    color: var(--kiro-purple);
    background: rgba(99, 102, 241, 0.05);
}

.nav-link::after {
    display: none;
}

.language-switcher {
    display: flex;
    gap: 0.25rem;
    margin-left: 1rem;
    background: var(--bg-secondary);
    padding: 0.25rem;
    border-radius: 0.5rem;
}

.lang-btn {
    background: transparent;
    border: none;
    padding: 0.375rem 0.75rem;
    border-radius: 0.375rem;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.lang-btn.active {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.3);
}

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

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    margin: 3px 0;
    transition: 0.3s;
}

/* Hero Section - Modern Minimalist */
.hero {
    padding: 140px 0 100px;
    background: linear-gradient(135deg, #f8fafc 0%, #e0e7ff 50%, #f8fafc 100%);
    min-height: 90vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.1) 0%, transparent 70%);
    border-radius: 50%;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.08) 0%, transparent 70%);
    border-radius: 50%;
}

.hero-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 2rem;
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 4rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.03em;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.5;
    font-weight: 400;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    margin-bottom: 3rem;
}

.btn {
    padding: 1rem 2rem;
    border-radius: 0.75rem;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    text-align: center;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    border: none;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.4);
}

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

.btn-secondary:hover {
    background: var(--kiro-purple);
    color: white;
    transform: translateY(-2px);
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-links a {
    width: 48px;
    height: 48px;
    background: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--kiro-purple);
    font-size: 1.25rem;
    text-decoration: none;
    transition: all 0.3s ease;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
}

.social-links a:hover {
    background: var(--gradient-primary);
    color: white;
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(99, 102, 241, 0.3);
}

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

.profile-card {
    background: white;
    border-radius: 2rem;
    padding: 2rem;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
    text-align: center;
    max-width: 300px;
    position: relative;
}

.profile-card::before {
    content: '';
    position: absolute;
    inset: -2px;
    background: var(--gradient-primary);
    border-radius: 2rem;
    z-index: -1;
    opacity: 0.1;
}

/* Profile photo styles */
.profile-photo {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    object-fit: cover;
    margin-bottom: 1rem;
    box-shadow: 0 10px 40px rgba(99, 102, 241, 0.3);
    border: 4px solid white;
    position: relative;
}

.profile-placeholder {
    font-size: 10rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1rem;
}

/* Section Styles - Modern Cards */
section {
    padding: 100px 0;
    position: relative;
}

.section-title {
    font-size: 3rem;
    font-weight: 800;
    text-align: center;
    margin-bottom: 1rem;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.section-subtitle {
    text-align: center;
    color: var(--text-secondary);
    font-size: 1.125rem;
    margin-bottom: 4rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* About Section */
.about {
    background: var(--bg-secondary);
}

.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 4rem;
    align-items: start;
}

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

.about-illustration {
    width: 100%;
    max-width: 300px;
    height: auto;
}

.about-text p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.7;
}

/* Skills Section - Modern Card Grid */
.skills {
    background: var(--bg-primary);
    padding: 100px 0;
}

.skills-category {
    margin-bottom: 3rem;
    background: white;
    padding: 2.5rem;
    border-radius: 1.5rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.skills-category:hover {
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
    transform: translateY(-2px);
}

.category-title {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--bg-secondary);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.category-title::before {
    content: '';
    width: 8px;
    height: 8px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: inline-block;
}

.skills-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.25rem;
}

.skill-bar-item {
    background: var(--bg-secondary);
    padding: 1.25rem 1.5rem;
    border-radius: 1rem;
    transition: all 0.3s ease;
    border: 1px solid transparent;
}

.skill-bar-item:hover {
    background: white;
    border-color: var(--kiro-purple);
    transform: translateX(4px);
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.15);
}

.skill-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
}

.skill-name {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.95rem;
}

.skill-level {
    font-size: 0.8rem;
    color: var(--text-light);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0.25rem 0.75rem;
    background: white;
    border-radius: 2rem;
}

.skill-bar {
    width: 100%;
    height: 6px;
    background: rgba(99, 102, 241, 0.1);
    border-radius: 3px;
    overflow: hidden;
    position: relative;
}

.skill-progress {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: 3px;
    transition: width 1.5s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.skill-progress::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

/* Experience Section - Modern Timeline */
.experience {
    background: var(--bg-primary);
}

.timeline {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
    padding-left: 3rem;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--gradient-primary);
    border-radius: 2px;
}

.timeline-item {
    position: relative;
    margin-bottom: 3rem;
    padding-left: 2rem;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -3.5rem;
    top: 0;
    width: 20px;
    height: 20px;
    background: white;
    border: 4px solid var(--kiro-purple);
    border-radius: 50%;
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
    z-index: 1;
}

.timeline-content {
    background: white;
    padding: 2rem;
    border-radius: 1.5rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    position: relative;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.timeline-content:hover {
    box-shadow: 0 8px 30px rgba(99, 102, 241, 0.15);
    transform: translateX(8px);
    border-color: var(--kiro-purple);
}

.timeline-content::before {
    content: '';
    position: absolute;
    left: -12px;
    top: 24px;
    width: 0;
    height: 0;
    border-top: 8px solid transparent;
    border-bottom: 8px solid transparent;
    border-right: 12px solid white;
}

.timeline-content h3 {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
    margin-bottom: 0.5rem;
    font-size: 1.5rem;
}

.timeline-period {
    color: var(--text-light);
    font-weight: 600;
    margin-bottom: 1rem;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.timeline-content p {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* Talks Section - Modern Video Grid */
.talks {
    background: var(--bg-secondary);
}

.talks-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
    gap: 2.5rem;
    margin-bottom: 5rem;
}

.talk-card {
    background: white;
    border-radius: 1.5rem;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid var(--border-color);
}

.talk-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(99, 102, 241, 0.2);
    border-color: var(--kiro-purple);
}

.talk-thumbnail {
    position: relative;
    width: 100%;
    padding-bottom: 56.25%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    overflow: hidden;
}

.talk-thumbnail::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 0%, rgba(0, 0, 0, 0.3) 100%);
    z-index: 1;
}

.talk-thumbnail iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

.talk-content {
    padding: 2rem;
}

.talk-content h3 {
    color: var(--text-primary);
    font-weight: 700;
    margin-bottom: 0.75rem;
    font-size: 1.25rem;
    line-height: 1.4;
}

.talk-content p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.6;
    font-size: 0.95rem;
}

.talk-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--kiro-purple);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    transition: all 0.3s ease;
    padding: 0.5rem 1rem;
    background: rgba(99, 102, 241, 0.05);
    border-radius: 0.5rem;
}

.talk-link:hover {
    background: var(--gradient-primary);
    color: white;
    transform: translateX(4px);
}

.talk-link i {
    font-size: 0.875rem;
    transition: transform 0.3s ease;
}

.talk-link:hover i {
    transform: translateX(2px);
}

.subsection-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 3rem;
    text-align: center;
    position: relative;
    padding-bottom: 1rem;
}

.subsection-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: var(--gradient-primary);
    border-radius: 2px;
}

.speaking-topics {
    margin-top: 5rem;
}

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

.topic-card {
    background: white;
    padding: 2.5rem;
    border-radius: 1.5rem;
    text-align: center;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.topic-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

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

.topic-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 30px rgba(99, 102, 241, 0.15);
}

.topic-card i {
    font-size: 3rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1.5rem;
    display: block;
}

.topic-card h4 {
    color: var(--text-primary);
    margin-bottom: 1rem;
    font-weight: 700;
    font-size: 1.25rem;
}

.topic-card p {
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: 0.95rem;
}

/* Mentorship Section */
.mentorship-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 3rem;
    align-items: start;
}

.mentorship-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.mentorship-illustration {
    width: 100%;
    max-width: 250px;
    height: auto;
}

.mentorship-text h3 {
    color: var(--kiro-purple);
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.mentorship-text p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.7;
}

.mentorship-btn {
    display: inline-block;
}

.mentorship-stats {
    display: grid;
    gap: 1.5rem;
}

.stat-item {
    text-align: center;
    background: white;
    padding: 2rem;
    border-radius: 0.75rem;
    box-shadow: var(--shadow);
}

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--kiro-purple);
    margin-bottom: 0.5rem;
}

.stat-label {
    color: var(--text-secondary);
    font-weight: 500;
}

/* Contact Section */
.contact {
    background: var(--bg-secondary);
}

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

.contact-content > p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 3rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.contact-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.contact-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background: white;
    padding: 1rem 1.5rem;
    border-radius: 0.5rem;
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 500;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}

.contact-link:hover {
    background: var(--kiro-purple);
    color: white;
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.contact-link i {
    font-size: 1.25rem;
}

/* Footer */
.footer {
    background: var(--bg-dark);
    color: white;
    text-align: center;
    padding: 2rem 0;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow);
        padding: 2rem 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .hamburger {
        display: flex;
    }

    .hamburger.active span:nth-child(2) {
        opacity: 0;
    }

    .hamburger.active span:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    .hamburger.active span:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .about-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .about-visual {
        order: -1;
    }

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

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

    .speaking-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .speaking-visual {
        order: -1;
    }

    .mentorship-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .mentorship-visual {
        order: -1;
    }

    .timeline::before {
        left: 20px;
    }

    .timeline-item:nth-child(odd) .timeline-content,
    .timeline-item:nth-child(even) .timeline-content {
        margin-left: 60px;
        margin-right: 0;
        padding-left: 2rem;
        padding-right: 2rem;
        text-align: left;
    }

    .timeline-item:nth-child(odd) .timeline-content::before,
    .timeline-item:nth-child(even) .timeline-content::before {
        left: -2.5rem;
        right: auto;
    }

    .speaking-topics {
        grid-template-columns: 1fr;
    }

    .mentorship-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .contact-links {
        flex-direction: column;
        align-items: center;
    }

    .container {
        padding: 0 1rem;
    }

    .nav-container {
        padding: 0 1rem;
    }

    .hero-container {
        padding: 0 1rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .btn {
        padding: 0.75rem 1.5rem;
    }

    .social-links a {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }
}

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}

/* Animation classes */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

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


/* Additional Modern Responsive Updates */
@media (max-width: 768px) {
    .navbar {
        top: 0.5rem;
        width: calc(100% - 2rem);
        border-radius: 0.75rem;
    }

    .skills-list {
        grid-template-columns: 1fr;
    }

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

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

    .timeline {
        padding-left: 2rem;
    }

    .timeline::before {
        left: 0;
    }

    .timeline-item::before {
        left: -2.5rem;
    }

    .timeline-content::before {
        display: none;
    }
}

@media (max-width: 480px) {
    .profile-photo {
        width: 160px;
        height: 160px;
    }

    .skills-category {
        padding: 1.5rem;
    }

    .talk-content {
        padding: 1.5rem;
    }

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

    .section-title {
        font-size: 1.75rem;
    }
}