/* ===================================
   FORMAL PROFESSIONAL PORTFOLIO
   Kevin Ryou Inoue
   =================================== */

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

:root {
    /* Light Mode Colors */
    --primary-bg: #ffffff;
    --primary-bg-alt: #f8f9fa;
    --text-primary: #000000;
    --text-secondary: #000000;
    --text-muted: #000000;
    --border-color: #e0e0e0;
    --accent-orange: #ff9d5c;
    --accent-orange-light: #ffb07c;
    --accent-orange-dark: #e6884a;
    --navbar-bg: rgba(255, 255, 255, 0.95);
    --card-bg: rgba(0, 0, 0, 0.02);
    --card-hover-bg: rgba(0, 0, 0, 0.04);
    
    /* Typography - Consistent across all themes */
    --font-main: 'Calibri', 'Segoe UI', Arial, sans-serif;
    
    /* Spacing - Consistent across all themes */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
}

[data-theme="dark"] {
    /* Dark Mode Colors */
    --primary-bg: #0a0e17;
    --primary-bg-alt: #1a2332;
    --text-primary: #ffffff;
    --text-secondary: #e0e6ed;
    --text-muted: #a0aec0;
    --border-color: #2d3748;
    --accent-orange: #ff9d5c;
    --accent-orange-light: #ffb07c;
    --accent-orange-dark: #e6884a;
    --navbar-bg: rgba(26, 35, 50, 0.95);
    --card-bg: rgba(255, 157, 92, 0.03);
    --card-hover-bg: rgba(255, 157, 92, 0.06);
}

html {
    scroll-behavior: smooth;
    font-size: 18px;
}

body {
    font-family: var(--font-main);
    background-color: var(--primary-bg);
    color: var(--text-primary);
    line-height: 1.8;
    font-weight: 400;
    overflow-x: hidden;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* ===================================
   NAVIGATION
   =================================== */

.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: var(--navbar-bg);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1.5rem 3rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-family: var(--font-main);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    text-decoration: none;
    letter-spacing: 1px;
    transition: color 0.3s ease;
}

.nav-logo:hover {
    color: var(--accent-orange);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2.5rem;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 1.1rem;
    font-weight: 400;
    letter-spacing: 0;
    text-transform: capitalize;
    transition: all 0.3s ease;
    position: relative;
    padding: 0.5rem 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-orange);
    transition: width 0.3s ease;
}

.nav-link:hover,
.nav-link.active {
    color: var(--accent-orange);
}

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

.theme-toggle {
    background: transparent;
    border: 2px solid var(--border-color);
    border-radius: 50%;
    width: 45px;
    height: 45px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    margin-left: 2rem;
}

.theme-toggle:hover {
    border-color: var(--accent-orange);
    background: rgba(255, 157, 92, 0.1);
    transform: rotate(20deg);
}

.theme-icon {
    font-size: 1.5rem;
    transition: transform 0.3s ease;
}

/* ===================================
   HERO SECTION
   =================================== */

.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: var(--spacing-lg) var(--spacing-md);
    background: var(--primary-bg);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(255, 157, 92, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 157, 92, 0.03) 0%, transparent 50%);
    opacity: 1;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 900px;
}

.hero-greeting {
    font-size: 0.9rem;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--accent-gold);
    margin-bottom: var(--spacing-sm);
    font-weight: 400;
}

.hero-title {
    font-family: var(--font-main);
    font-size: 6.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    letter-spacing: 0;
    line-height: 1.1;
    text-transform: none;
}

.hero-divider {
    width: 80px;
    height: 2px;
    background: var(--accent-gold);
    margin: var(--spacing-md) auto;
}

.hero-subtitle {
    font-size: 2.2rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    font-weight: 400;
    letter-spacing: 0;
}

.accent-text {
    color: var(--accent-orange);
    font-weight: 400;
}

.hero-location {
    font-size: 1rem;
    color: var(--text-muted);
    margin-bottom: var(--spacing-md);
    font-style: italic;
}

.scroll-indicator {
    position: absolute;
    bottom: 3rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    color: var(--accent-orange);
    animation: bounce 2s infinite;
    cursor: pointer;
}

.scroll-arrow {
    font-size: 2rem;
    color: var(--accent-orange);
}

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

.hero-contact {
    display: flex;
    gap: 1rem;
    justify-content: center;
    align-items: center;
    margin-bottom: var(--spacing-sm);
    flex-wrap: wrap;
}

.hero-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 1.1rem;
    transition: color 0.3s ease;
    border-bottom: 1px solid transparent;
}

.hero-link:hover {
    color: var(--accent-gold);
    border-bottom-color: var(--accent-gold);
}

.divider {
    color: var(--border-color);
}

.hero-social {
    display: flex;
    gap: 2rem;
    justify-content: center;
    margin-top: var(--spacing-md);
}

.social-link {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.95rem;
    letter-spacing: 1px;
    text-transform: uppercase;
    padding: 0.8rem 1.5rem;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.social-link:hover {
    color: var(--accent-gold);
    border-color: var(--accent-gold);
    background: rgba(201, 169, 97, 0.05);
}

/* ===================================
   ABOUT SECTION
   =================================== */

.about-section {
    padding: var(--spacing-xl) var(--spacing-md);
    min-height: 100vh;
}

.about-container {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-content {
    padding-right: 2rem;
}

.about-title {
    font-size: 4rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 2rem;
    font-family: var(--font-main);
}

.about-description {
    font-size: 1.25rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem 2rem;
    margin-bottom: 2.5rem;
}

.tech-item {
    font-size: 1.1rem;
    color: #5b9cff;
    font-weight: 400;
}

[data-theme="light"] .tech-item {
    color: var(--accent-orange);
}

.download-cv-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2.2rem;
    background: #5b9cff;
    color: #ffffff;
    text-decoration: none;
    border-radius: 8px;
    font-size: 1.15rem;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
}

.download-cv-btn:hover {
    background: #4a8ae8;
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(91, 156, 255, 0.4);
}

[data-theme="light"] .download-cv-btn {
    background: var(--accent-orange);
}

[data-theme="light"] .download-cv-btn:hover {
    background: var(--accent-orange-dark);
    box-shadow: 0 8px 20px rgba(255, 157, 92, 0.4);
}

.cv-icon {
    font-size: 1.2rem;
}

.about-image {
    width: 100%;
    height: 600px;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

[data-theme="light"] .about-image {
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
}

.about-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

@media (max-width: 1024px) {
    .about-container {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .about-content {
        padding-right: 0;
    }
    
    .tech-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .about-image {
        height: 500px;
    }
}

/* ===================================
   SECTIONS
   =================================== */

.section {
    padding: var(--spacing-xl) var(--spacing-md);
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: var(--primary-bg);
    transition: background-color 0.3s ease;
}

.section-alternate {
    background-color: var(--primary-bg-alt);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

.section-title {
    font-family: var(--font-main);
    font-size: 3.5rem;
    text-align: center;
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
    font-weight: 600;
    letter-spacing: 2px;
    position: relative;
    padding-bottom: var(--spacing-md);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: var(--accent-orange);
}

/* ===================================
   SUMMARY SECTION
   =================================== */

.summary-content {
    max-width: 900px;
    margin: 0 auto;
}

.summary-text {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 2;
    text-align: justify;
}

/* ===================================
   EXPERIENCE SECTION
   =================================== */

.experience-container {
    max-width: 1000px;
    margin: 0 auto;
}

.experience-item {
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md);
    border-left: 3px solid var(--accent-orange);
    background: var(--card-bg);
    transition: all 0.3s ease;
}

.experience-item:hover {
    background: var(--card-hover-bg);
    border-left-width: 5px;
}

.experience-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.experience-left {
    flex: 1;
    min-width: 250px;
}

.experience-right {
    text-align: right;
}

.experience-title {
    font-family: var(--font-main);
    font-size: 1.8rem;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
}

.experience-company {
    font-size: 1.35rem;
    color: var(--accent-orange);
    font-weight: 400;
}

.experience-location {
    font-size: 0.95rem;
    color: var(--text-muted);
    margin-bottom: 0.25rem;
}

.experience-period {
    font-size: 0.95rem;
    color: var(--text-muted);
    font-style: italic;
}

.experience-description {
    list-style: none;
    padding-left: 0;
}

.experience-description li {
    margin-bottom: var(--spacing-sm);
    padding-left: 1.5rem;
    position: relative;
    color: var(--text-secondary);
    line-height: 1.8;
    font-size: 1.1rem;
}

.experience-description li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--accent-orange);
    font-size: 1.2rem;
}

/* ===================================
   PROJECTS SECTION
   =================================== */

.projects-container {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

@media (max-width: 1024px) {
    .projects-container {
        grid-template-columns: 1fr;
    }
}

.project-item {
    margin-bottom: 0;
    padding: 0;
    border: 2px solid rgba(99, 102, 241, 0.3);
    background: #2d3748;
    transition: all 0.3s ease;
    overflow: hidden;
    border-radius: 12px;
    display: flex;
    flex-direction: column;
}

[data-theme="light"] .project-item {
    background: #f8f9fa;
    border-color: #e0e0e0;
}

.project-item:hover {
    border-color: rgba(99, 102, 241, 0.6);
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(99, 102, 241, 0.3);
}

[data-theme="light"] .project-item:hover {
    border-color: var(--accent-orange);
    box-shadow: 0 15px 40px rgba(255, 157, 92, 0.2);
}

.project-image {
    width: 100%;
    height: 300px;
    overflow: hidden;
    background: #1a202c;
    flex-shrink: 0;
}

[data-theme="light"] .project-image {
    background: #ffffff;
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.project-item:hover .project-image img {
    transform: scale(1.08);
}

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-sm);
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-md) 0 var(--spacing-md);
    background: #3d4a5c;
    flex: 1;
}

[data-theme="light"] .project-header {
    background: transparent;
}

.project-title {
    font-family: var(--font-main);
    font-size: 1.8rem;
    color: #ffffff;
    font-weight: 600;
    flex: 1;
    line-height: 1.3;
}

[data-theme="light"] .project-title {
    color: var(--text-primary);
}

.project-link {
    color: #5b9cff;
    text-decoration: none;
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
    padding: 0.5rem 1rem;
    background: rgba(91, 156, 255, 0.1);
    border: 1px solid rgba(91, 156, 255, 0.3);
    border-radius: 6px;
    font-weight: 500;
}

.project-link:hover {
    background: rgba(91, 156, 255, 0.2);
    border-color: #5b9cff;
    transform: translateY(-2px);
}

[data-theme="light"] .project-link {
    color: var(--accent-orange);
    background: rgba(255, 157, 92, 0.1);
    border-color: rgba(255, 157, 92, 0.3);
}

[data-theme="light"] .project-link:hover {
    background: rgba(255, 157, 92, 0.2);
    border-color: var(--accent-orange);
}

.github-icon {
    font-weight: 500;
}

.project-date {
    font-size: 0.9rem;
    color: var(--text-muted);
    font-style: italic;
}

.project-description {
    color: #cbd5e0;
    margin-bottom: var(--spacing-md);
    line-height: 1.7;
    padding: 0 var(--spacing-md);
    background: #3d4a5c;
    font-size: 1.15rem;
}

[data-theme="light"] .project-description {
    color: var(--text-secondary);
    background: transparent;
}

.project-technologies {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
    padding: 0 var(--spacing-md) var(--spacing-md) var(--spacing-md);
    background: #3d4a5c;
}

[data-theme="light"] .project-technologies {
    background: transparent;
}

.tech-tag {
    padding: 0.5rem 1.2rem;
    background: #5b9cff;
    border: none;
    color: #ffffff;
    font-size: 1rem;
    letter-spacing: 0;
    transition: all 0.3s ease;
    border-radius: 20px;
    font-weight: 500;
}

.tech-tag:hover {
    background: #4a8ae8;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(91, 156, 255, 0.4);
}

[data-theme="light"] .tech-tag {
    background: var(--accent-orange);
    color: #ffffff;
}

[data-theme="light"] .tech-tag:hover {
    background: var(--accent-orange-dark);
    box-shadow: 0 4px 12px rgba(255, 157, 92, 0.4);
}

/* ===================================
   SKILLS SECTION
   =================================== */

.skills-container {
    max-width: 1000px;
    margin: 0 auto;
}

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

.skill-group-title {
    font-family: var(--font-main);
    font-size: 1.7rem;
    color: var(--accent-orange);
    margin-bottom: var(--spacing-md);
    font-weight: 600;
    text-align: center;
}

.skill-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    justify-content: center;
}

.skill-badge {
    padding: 0.7rem 1.6rem;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 1.1rem;
    letter-spacing: 0.5px;
    transition: all 0.3s ease;
}

.skill-badge:hover {
    background: rgba(255, 157, 92, 0.15);
    border-color: var(--accent-orange);
    color: var(--accent-orange);
    transform: translateY(-2px);
}

/* ===================================
   EDUCATION SECTION
   =================================== */

.education-container {
    max-width: 1000px;
    margin: 0 auto;
}

.education-item {
    padding: var(--spacing-md);
    border: 1px solid var(--border-color);
    background: var(--card-bg);
}

.education-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.education-left {
    flex: 1;
    min-width: 250px;
}

.education-right {
    text-align: right;
}

.education-degree {
    font-family: var(--font-main);
    font-size: 2rem;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
}

.education-school {
    font-size: 1.5rem;
    color: var(--accent-orange);
    font-weight: 400;
}

.education-location {
    font-size: 0.95rem;
    color: var(--text-muted);
    margin-bottom: 0.25rem;
}

.education-period {
    font-size: 0.95rem;
    color: var(--text-muted);
    font-style: italic;
}

/* ===================================
   CONTACT SECTION
   =================================== */

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

.contact-intro {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.contact-text {
    font-size: 1.3rem;
    color: var(--text-secondary);
    line-height: 2;
}

.contact-details {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

.contact-group {
    padding: var(--spacing-md);
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.contact-group:hover {
    border-color: var(--accent-orange);
    background: var(--card-hover-bg);
}

.contact-label {
    font-family: var(--font-main);
    font-size: 1.1rem;
    color: var(--accent-orange);
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.contact-value {
    color: var(--text-secondary);
    font-size: 1.1rem;
    text-decoration: none;
    display: block;
    transition: color 0.3s ease;
}

.contact-value:hover {
    color: var(--accent-orange);
}

.contact-links {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.contact-value-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 1rem;
    transition: color 0.3s ease;
    border-bottom: 1px solid transparent;
    display: inline-block;
}

.contact-value-link:hover {
    color: var(--accent-orange);
    border-bottom-color: var(--accent-orange);
}

/* ===================================
   FOOTER
   =================================== */

.footer {
    background: var(--primary-bg-alt);
    padding: var(--spacing-md);
    border-top: 1px solid var(--border-color);
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
}

.footer-text {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.footer-tech {
    color: var(--text-muted);
    font-size: 0.85rem;
    font-style: italic;
}

/* ===================================
   RESPONSIVE DESIGN
   =================================== */

@media (max-width: 1024px) {
    .nav-container {
        padding: 1.5rem 2rem;
    }
    
    .hero-title {
        font-size: 3.5rem;
    }
    
    .section-title {
        font-size: 2.5rem;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .nav-container {
        padding: 1rem 1.5rem;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.2rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .section {
        padding: var(--spacing-lg) var(--spacing-sm);
    }
    
    .experience-header,
    .education-header,
    .project-header {
        flex-direction: column;
    }
    
    .experience-right,
    .education-right {
        text-align: left;
    }
    
    .hero-contact {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .divider {
        display: none;
    }
}

@media (max-width: 480px) {
    :root {
        font-size: 14px;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .nav-logo {
        font-size: 1.1rem;
    }
}