/* ===================================
   CSS Variables - Light/Dark Theme Support
   =================================== */

:root {
    /* Light Theme (Default) - Greenish background with darker text for visibility */
    --bg-primary: #e8f5e9;
    --bg-secondary: #f1f8e9;
    --bg-tertiary: #dcedc8;
    --bg-card: #ffffff;
    
    --text-primary: #0d0d0d;
    --text-secondary: #2d2d2d;
    --text-muted: #4a4a4a;
    
    /* Green accent for light theme */
    --accent-primary: #2e7d32;
    --accent-secondary: #388e3c;
    --accent-tertiary: #43a047;
    --accent-light: #81c784;
    --accent-rgb: 46, 125, 50;
    
    --border-color: rgba(0, 0, 0, 0.1);
    --card-border: rgba(0, 0, 0, 0.08);
    --shadow-color: rgba(0, 0, 0, 0.1);
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-serif: 'Playfair Display', Georgia, serif;
    
    /* Spacing */
    --section-padding: clamp(60px, 10vh, 120px);
    --container-max: 1200px;
    --container-padding: clamp(20px, 5vw, 60px);
    
    /* Borders & Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* Dark Theme */
[data-theme="dark"] {
    --bg-primary: #0a0a0a;
    --bg-secondary: #111111;
    --bg-tertiary: #1a1a1a;
    --bg-card: #141414;
    
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --text-muted: #666666;
    
    --accent-primary: #4ade80;
    --accent-secondary: #22c55e;
    --accent-tertiary: #16a34a;
    --accent-light: #86efac;
    --accent-rgb: 74, 222, 128;
    
    --border-color: rgba(255, 255, 255, 0.08);
    --card-border: rgba(255, 255, 255, 0.05);
    --shadow-color: rgba(0, 0, 0, 0.3);
}

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

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

body {
    font-family: var(--font-primary);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===================================
   Particle Canvas Background
   =================================== */
#particle-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

/* ===================================
   Navigation
   =================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 20px 0;
    transition: var(--transition-base);
}

.navbar.scrolled {
    background: rgba(232, 245, 233, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
}

[data-theme="dark"] .navbar.scrolled {
    background: rgba(10, 10, 10, 0.9);
}

/* Theme Toggle Button */
.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: var(--transition-base);
    color: var(--text-primary);
    font-size: 1.2rem;
}

.theme-toggle:hover {
    border-color: var(--accent-primary);
    transform: scale(1.05);
}

.theme-toggle .sun-icon {
    display: none;
}

.theme-toggle .moon-icon {
    display: block;
}

[data-theme="dark"] .theme-toggle .sun-icon {
    display: block;
}

[data-theme="dark"] .theme-toggle .moon-icon {
    display: none;
}

.nav-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-primary);
    text-decoration: none;
    letter-spacing: 0.05em;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 30px;
    list-style: none;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 15px;
}

.nav-link {
    font-size: 0.9rem;
    font-weight: 400;
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition-base);
    position: relative;
}

.nav-link:hover {
    color: var(--text-primary);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--accent-primary);
    transition: var(--transition-base);
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition-base);
}

/* ===================================
   Main Content
   =================================== */
.main-content {
    position: relative;
    z-index: 1;
}

.section-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* ===================================
   Hero Section
   =================================== */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 0 80px;
}

.hero-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.hero-left {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.hero-intro {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.95rem;
}

.intro-arrow {
    font-size: 1.2rem;
    color: var(--accent-primary);
}

.intro-text {
    color: var(--text-secondary);
}

.intro-name {
    color: var(--text-primary);
    font-weight: 500;
}

.hero-main {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.hero-designer {
    font-size: 1.1rem;
    color: var(--text-secondary);
    font-weight: 400;
}

.hero-title {
    font-family: var(--font-serif);
    font-size: clamp(3rem, 6vw, 5rem);
    font-weight: 400;
    line-height: 1.1;
    color: var(--text-primary);
}

.title-line {
    display: block;
}

.title-circle {
    display: inline-block;
    width: clamp(60px, 8vw, 100px);
    height: clamp(60px, 8vw, 100px);
    background: var(--accent-primary);
    border-radius: 50%;
    vertical-align: middle;
    margin-left: 10px;
    animation: pulse 3s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        opacity: 1;
    }
    50% {
        transform: scale(1.05);
        opacity: 0.9;
    }
}

.hero-cover {
    font-family: var(--font-serif);
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-style: italic;
    font-weight: 400;
    color: var(--text-primary);
    margin-top: 10px;
}

.hero-tagline {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-top: 20px;
    max-width: 450px;
}

.hero-role {
    margin-top: 20px;
}

.role-text {
    font-size: 1rem;
    color: var(--text-secondary);
}

.role-highlight {
    color: var(--accent-primary);
    font-weight: 500;
}



/* ===================================
   About Section
   =================================== */
.about-section {
    padding: var(--section-padding) 0;
}

.about-content {
    max-width: 800px;
}

.about-text {
    font-size: 1.15rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

.about-company {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--text-primary);
    font-weight: 500;
}

.about-company img {
    width: 24px;
    height: 24px;
    border-radius: 4px;
}

/* ===================================
   Education Section
   =================================== */
.education-section {
    padding: var(--section-padding) 0;
}

.education-grid {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.education-card {
    display: flex;
    gap: 24px;
    padding: 30px;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.3);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.06);
    transition: var(--transition-base);
}

[data-theme="dark"] .education-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.education-card:hover {
    background: rgba(255, 255, 255, 0.22);
    border-color: rgba(var(--accent-rgb), 0.4);
    transform: translateX(5px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] .education-card:hover {
    background: rgba(255, 255, 255, 0.06);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
}

.education-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.education-info {
    flex: 1;
}

.education-year {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--accent-primary);
    background: rgba(var(--accent-rgb), 0.1);
    padding: 4px 12px;
    border-radius: var(--radius-full);
    margin-bottom: 12px;
}

.education-degree {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.education-school {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.education-details {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.6;
}

/* ===================================
   Skills & Technologies Section
   =================================== */
.skills-tech-section {
    padding: var(--section-padding) 0;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 30px;
}

.skill-category {
    padding: 28px;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.3);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.06);
    transition: var(--transition-base);
}

[data-theme="dark"] .skill-category {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.skill-category:hover {
    background: rgba(255, 255, 255, 0.22);
    border-color: rgba(var(--accent-rgb), 0.4);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] .skill-category:hover {
    background: rgba(255, 255, 255, 0.06);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
}

.skill-category-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 18px;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.skill-tag {
    font-size: 0.85rem;
    color: var(--text-secondary);
    background: rgba(255, 255, 255, 0.05);
    padding: 8px 14px;
    border-radius: var(--radius-full);
    border: 1px solid var(--border-color);
    transition: var(--transition-base);
}

.skill-tag:hover {
    color: var(--accent-primary);
    border-color: var(--accent-primary);
    background: rgba(var(--accent-rgb), 0.1);
}

/* ===================================
   Statement Section
   =================================== */
.statement-section {
    padding: var(--section-padding) 0;
}

.statement-content {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.statement-text {
    font-family: var(--font-serif);
    font-size: clamp(1.8rem, 3vw, 2.5rem);
    font-weight: 400;
    line-height: 1.4;
    color: var(--text-primary);
}

/* ===================================
   Project Tech Tags
   =================================== */
.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 20px;
}

.tech-tag {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--accent-primary);
    background: rgba(var(--accent-rgb), 0.1);
    padding: 6px 12px;
    border-radius: var(--radius-full);
    border: 1px solid rgba(var(--accent-rgb), 0.2);
}

/* ===================================
   Projects Section
   =================================== */
.projects-section {
    padding: var(--section-padding) 0;
}

.project-featured {
    margin-bottom: 80px;
}

.project-featured:last-child {
    margin-bottom: 0;
}

.project-label {
    display: inline-block;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--accent-primary);
    margin-bottom: 20px;
    letter-spacing: 0.05em;
}

.project-title {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 20px;
}

.project-description {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.8;
    max-width: 700px;
    margin-bottom: 24px;
}

.project-link {
    display: inline-block;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--accent-primary);
    text-decoration: none;
    margin-bottom: 30px;
    transition: var(--transition-base);
}

.project-link:hover {
    color: var(--accent-light);
}

.project-image {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}

.project-image img {
    width: 100%;
    height: auto;
    display: block;
    transition: var(--transition-slow);
}

/* Theme-based image switching */
.project-image .img-dark {
    display: none;
}

.project-image .img-light {
    display: block;
}

[data-theme="dark"] .project-image .img-dark {
    display: block;
}

[data-theme="dark"] .project-image .img-light {
    display: none;
}

.project-featured:hover .project-image img {
    transform: scale(1.02);
}

/* ===================================
   Contact Section
   =================================== */
.contact-section {
    padding: var(--section-padding) 0;
}

.contact-intro {
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 1.8;
    max-width: 600px;
    margin-bottom: 40px;
}

.contact-links {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
}

.contact-link {
    font-size: 0.95rem;
    color: var(--text-primary);
    text-decoration: none;
    padding: 12px 24px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    transition: var(--transition-base);
}

.contact-link:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

/* ===================================
   Footer
   =================================== */
.footer {
    padding: 40px 0;
    border-top: 1px solid var(--border-color);
}

.footer-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
    text-align: center;
}

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

/* ===================================
   Responsive Design
   =================================== */
@media (max-width: 992px) {
    .hero-container {
        text-align: center;
        align-items: center;
    }
    
    .hero-left {
        align-items: center;
    }
    
    .hero-intro {
        justify-content: center;
    }
    
    .hero-tagline {
        margin-left: auto;
        margin-right: auto;
    }
    
    .skills-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 70%;
        max-width: 300px;
        height: 100vh;
        background: var(--bg-secondary);
        flex-direction: column;
        justify-content: center;
        gap: 30px;
        transition: var(--transition-base);
        border-left: 1px solid var(--border-color);
    }
    
    .nav-actions {
        position: absolute;
        top: 20px;
        right: 70px;
    }
    
    .theme-toggle {
        width: 40px;
        height: 40px;
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero-title {
        font-size: clamp(2.2rem, 8vw, 3.5rem);
    }
    
    .hero-cover {
        font-size: clamp(1.8rem, 7vw, 3rem);
    }
    
    .title-circle {
        width: 50px;
        height: 50px;
    }
    
    .education-card {
        flex-direction: column;
        text-align: center;
    }
    
    .skills-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-links {
        flex-direction: column;
        align-items: flex-start;
    }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
}