/* d:\portfolio\css\style.css */
:root {
    --bg-color: #FFFBF0;
    --primary: #FFD600;
    --secondary: #FF3F3F;
    --tertiary: #0066FF;
    --text-color: #0A0A0A;
    --border-color: #0A0A0A;
    
    --font-display: 'Syne', sans-serif;
    --font-mono: 'IBM Plex Mono', monospace;
    
    --border-width: 3px;
    --shadow-size: 6px;
    --shadow-hover: 8px;
    --radius: 0px;
    --badge-radius: 4px;
    
    --nav-height: 80px;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--nav-height);
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-mono);
    line-height: 1.6;
    overflow-x: hidden;
    cursor: none; /* For custom cursor */
}

/* Custom Cursor */
.custom-cursor {
    position: fixed;
    width: 20px;
    height: 20px;
    border: 2px solid var(--text-color);
    background-color: var(--primary);
    pointer-events: none;
    z-index: 9999;
    transform: translate(-50%, -50%);
    transition: width 0.2s, height 0.2s, background-color 0.2s, opacity 0.2s;
    mix-blend-mode: difference;
    border-radius: 0; /* Neubrutalism sharp */
    opacity: 0; /* Initial hidden */
    display: none; /* Controlled by JS based on pointer type */
}

@media (pointer: fine) {
    body {
        cursor: none; /* Hide default cursor */
    }
}

.custom-cursor.hovering {
    width: 40px;
    height: 40px;
    background-color: transparent;
    border-color: var(--primary);
}

/* Scroll Indicator */
.scroll-indicator {
    position: fixed;
    left: 20px;
    top: 50%;
    transform: translateY(-50%);
    height: 300px;
    width: 2px;
    background-color: rgba(10, 10, 10, 0.2);
    z-index: 100;
    display: none;
}

@media (min-width: 1200px) {
    .scroll-indicator {
        display: block;
    }
}

.scroll-line {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 0%;
    background-color: var(--text-color);
}

.scroll-dot {
    position: absolute;
    left: -4px;
    top: 0;
    width: 10px;
    height: 10px;
    background-color: var(--primary);
    border: 2px solid var(--border-color);
    transform: translateY(-50%);
    transition: top 0.1s;
    z-index: 2;
}

/* Layout */
.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: 100px 0;
    position: relative;
}

.section-marker {
    position: absolute;
    top: 40px;
    left: 0;
    font-family: var(--font-mono);
    font-weight: 600;
    font-size: 0.9rem;
    text-transform: uppercase;
}

@media (max-width: 900px) {
    .section-marker {
        left: 24px;
    }
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    color: var(--text-color);
    text-transform: uppercase;
}

/* Navbar */
.navbar {
    position: sticky;
    top: 0;
    background-color: var(--bg-color);
    border-bottom: var(--border-width) solid var(--border-color);
    height: var(--nav-height);
    z-index: 1000;
    display: flex;
    align-items: center;
}

.nav-container {
    width: 100%;
    max-width: 900px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    justify-content: space-between; /* Space out hamburger, links, and lang switcher */
    align-items: center;
}

.nav-logo {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-color);
    text-decoration: none;
    letter-spacing: -1px;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 24px;
}

.nav-link {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 600;
    font-size: 0.9rem;
    position: relative;
    text-transform: uppercase;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--text-color);
    transition: width 0.3s;
}

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

/* Language Switcher */
.lang-toggle {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 6px 12px;
    font-family: var(--font-mono);
    font-weight: 600;
    font-size: 0.8rem;
    background-color: var(--primary);
    border: var(--border-width) solid var(--border-color);
    box-shadow: 3px 3px 0px var(--border-color);
    cursor: none; /* Custom cursor handles this */
    transition: all 0.1s ease;
    text-transform: uppercase;
    color: var(--text-color);
}

.lang-toggle:hover {
    transform: translate(1px, 1px);
    box-shadow: 2px 2px 0px var(--border-color);
}

.lang-toggle:active {
    transform: translate(3px, 3px);
    box-shadow: 0px 0px 0px var(--border-color);
}

.lang-active {
    font-weight: 800;
}

.lang-sep {
    opacity: 0.5;
}

.lang-inactive {
    opacity: 0.6;
    font-weight: 400;
}

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

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

@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    .nav-links {
        position: absolute;
        top: var(--nav-height);
        left: 0;
        width: 100%;
        background-color: var(--bg-color);
        flex-direction: column;
        border-bottom: var(--border-width) solid var(--border-color);
        padding: 0;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease-out;
    }
    .nav-links.active {
        max-height: 400px;
        padding: 24px 0;
    }
    .nav-links li {
        text-align: center;
        padding: 12px 0;
    }
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    font-family: var(--font-mono);
    font-weight: 600;
    text-decoration: none;
    color: var(--text-color);
    border: var(--border-width) solid var(--border-color);
    box-shadow: var(--shadow-size) var(--shadow-size) 0px var(--border-color);
    transition: all 0.2s ease;
    cursor: none;
    background-color: transparent;
}

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

.btn-outline {
    background-color: var(--bg-color);
}

.btn-sm {
    padding: 8px 16px;
    font-size: 0.8rem;
}

.btn:hover {
    transform: translate(2px, 2px);
    box-shadow: calc(var(--shadow-size) - 2px) calc(var(--shadow-size) - 2px) 0px var(--border-color);
}

.btn:active {
    transform: translate(var(--shadow-size), var(--shadow-size));
    box-shadow: 0px 0px 0px var(--border-color);
}

/* Badges */
.badge {
    display: inline-block;
    padding: 4px 8px;
    font-size: 0.75rem;
    font-weight: 600;
    border: 2px solid var(--border-color);
    border-radius: var(--badge-radius);
    background-color: var(--bg-color);
}

.badge-yellow { background-color: var(--primary); }
.badge-red { background-color: var(--secondary); color: white; }
.badge-blue { background-color: var(--tertiary); color: white; }

/* 01 Hero Section */
.hero {
    min-height: calc(100vh - var(--nav-height));
    display: flex;
    align-items: center;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
}

.hero-title {
    font-size: clamp(36px, 8vw, 96px);
    line-height: 0.9;
    margin-bottom: 16px;
    letter-spacing: -2px;
}

.hero-subtitle {
    font-size: 1.5rem;
    font-family: var(--font-mono);
    margin-bottom: 24px;
    background-color: var(--text-color);
    color: var(--bg-color);
    display: inline-block;
    padding: 4px 12px;
}

.hero-desc {
    font-size: 1.1rem;
    margin-bottom: 32px;
    max-width: 400px;
}

.hero-cta {
    display: flex;
    gap: 16px;
    margin-bottom: 32px;
}

.hero-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.avatar-placeholder {
    width: 100%;
    aspect-ratio: 1;
    border: var(--border-width) solid var(--border-color);
    box-shadow: var(--shadow-size) var(--shadow-size) 0px var(--border-color);
    background-image: radial-gradient(var(--border-color) 2px, transparent 2px);
    background-size: 20px 20px;
    background-color: var(--primary);
    transition: transform 0.3s, box-shadow 0.3s;
}

.avatar-placeholder:hover {
    transform: translate(-4px, -4px);
    box-shadow: var(--shadow-hover) var(--shadow-hover) 0px var(--border-color);
}

@media (max-width: 768px) {
    .hero-content {
        grid-template-columns: 1fr;
    }
    .hero-visual {
        grid-row: 1;
        max-width: 300px;
        margin: 0 auto;
    }
}

/* 02 About Section */
.section-title {
    font-size: clamp(32px, 5vw, 64px);
    line-height: 1;
    margin-bottom: 48px;
    letter-spacing: -1px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 48px;
}

.stat-card {
    border: var(--border-width) solid var(--border-color);
    padding: 24px;
    box-shadow: var(--shadow-size) var(--shadow-size) 0px var(--border-color);
    background-color: var(--bg-color);
    transition: transform 0.3s, box-shadow 0.3s;
}

.stat-card:hover {
    transform: translate(-4px, -4px);
    box-shadow: var(--shadow-hover) var(--shadow-hover) 0px var(--border-color);
}

.stat-value {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 8px;
}

.stat-label {
    font-size: 0.9rem;
    font-weight: 600;
}

.about-text {
    font-size: 1.1rem;
    max-width: 700px;
}

@media (max-width: 768px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
}

/* 03 Skills Section */
.skill-group {
    margin-bottom: 48px;
}

.group-title {
    font-family: var(--font-mono);
    font-size: 1.2rem;
    margin-bottom: 24px;
    border-bottom: 2px solid var(--border-color);
    display: inline-block;
    padding-bottom: 4px;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 16px;
}

.skill-card {
    border: var(--border-width) solid var(--border-color);
    padding: 12px 16px;
    box-shadow: 4px 4px 0px var(--border-color);
    background-color: var(--bg-color);
    transition: transform 0.3s, box-shadow 0.3s;
    display: flex;
    align-items: center;
    gap: 12px;
}

.skill-card:hover {
    transform: translate(-3px, -3px);
    box-shadow: var(--shadow-size) var(--shadow-size) 0px var(--border-color);
}

.skill-name {
    font-weight: 600;
    font-size: 1.1rem;
}

/* 04 Projects Section */
.projects-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 48px;
}

.project-card {
    border: var(--border-width) solid var(--border-color);
    padding: 32px;
    box-shadow: var(--shadow-size) var(--shadow-size) 0px var(--border-color);
    background-color: var(--bg-color);
    transition: transform 0.3s, box-shadow 0.3s;
    display: flex;
    flex-direction: column;
}

.project-card:hover {
    transform: translate(-4px, -4px);
    box-shadow: var(--shadow-hover) var(--shadow-hover) 0px var(--border-color);
}

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 16px;
}

.project-num {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 800;
    line-height: 1;
}

.project-year {
    font-weight: 600;
    font-size: 0.9rem;
    border: 2px solid var(--border-color);
    padding: 2px 8px;
}

.project-title {
    font-size: 2rem;
    margin-bottom: 16px;
}

.project-desc {
    margin-bottom: 24px;
    flex-grow: 1;
}

.project-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 24px;
}

.stack-badge {
    padding: 4px 8px;
    border: 2px solid var(--border-color);
    font-size: 0.8rem;
    font-weight: 600;
}

.project-links {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: auto;
}

@media (min-width: 768px) {
    .projects-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* 05 Experience & 06 Education Section */
.timeline {
    position: relative;
}

.exp-header, .edu-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 16px;
    flex-wrap: wrap;
    gap: 16px;
}

.timeline-item, .edu-card {
    border: var(--border-width) solid var(--border-color);
    border-left: 6px solid var(--primary);
    padding: 32px;
    box-shadow: var(--shadow-size) var(--shadow-size) 0px var(--border-color);
    background-color: var(--bg-color);
    margin-bottom: 32px;
    transition: transform 0.3s, box-shadow 0.3s;
}

.edu-card {
    border-left: 6px solid var(--tertiary);
}

.timeline-item:hover, .edu-card:hover {
    transform: translate(-4px, -4px);
    box-shadow: var(--shadow-hover) var(--shadow-hover) 0px var(--border-color);
}

.exp-title, .edu-school {
    font-size: 1.5rem;
    margin-bottom: 4px;
}

.exp-company, .edu-major {
    font-family: var(--font-mono);
    font-weight: 600;
    font-size: 1.1rem;
    color: rgba(10, 10, 10, 0.7);
}

.exp-meta, .edu-meta {
    display: flex;
    align-items: center;
    gap: 12px;
}

.exp-period, .edu-period {
    font-weight: 600;
    font-size: 0.9rem;
}

.exp-points {
    margin-left: 20px;
}

.exp-points li {
    margin-bottom: 8px;
}

/* 07 Contact Section */
.contact-title {
    font-size: clamp(40px, 6vw, 80px);
    line-height: 1;
    margin-bottom: 48px;
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 48px;
}

.contact-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 24px 16px;
    border: var(--border-width) solid var(--border-color);
    box-shadow: var(--shadow-size) var(--shadow-size) 0px var(--border-color);
    background-color: var(--bg-color);
    text-decoration: none;
    color: var(--text-color);
    transition: transform 0.3s, box-shadow 0.3s, background-color 0.3s, color 0.3s;
    cursor: none;
    min-height: 160px;
}

.contact-card:hover {
    transform: translate(-4px, -4px);
    box-shadow: var(--shadow-hover) var(--shadow-hover) 0px var(--border-color);
}

.card-yellow:hover { background-color: var(--primary); }
.card-blue:hover { background-color: var(--tertiary); color: white; }
.card-red:hover { background-color: var(--secondary); color: white; }

.contact-icon {
    font-size: 24px;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 32px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    width: 100%;
}

.contact-label {
    font-weight: 800;
    font-size: 0.75rem;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: rgba(10, 10, 10, 0.6);
}

.contact-card:hover .contact-label {
    color: inherit;
    opacity: 0.8;
}

.contact-value {
    font-weight: 600;
    font-size: 0.95rem;
    word-break: break-all;
    max-width: 100%;
}

@media (max-width: 768px) {
    .contact-grid {
        grid-template-columns: 1fr;
    }
}

.cta-box {
    background-color: var(--primary);
    border: var(--border-width) solid var(--border-color);
    box-shadow: var(--shadow-size) var(--shadow-size) 0px var(--border-color);
    padding: 48px 24px;
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
}

.cta-box:hover {
    transform: translate(-4px, -4px);
    box-shadow: var(--shadow-hover) var(--shadow-hover) 0px var(--border-color);
}

.cta-box h3 {
    font-size: 2rem;
    margin-bottom: 24px;
}

/* Footer */
.footer {
    border-top: 2px solid var(--border-color);
    padding: 24px 0;
    margin-top: 48px;
}

.footer-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
    font-size: 0.9rem;
}

@media (max-width: 768px) {
    .footer-container {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }
}

/* Animations */
.fade-in-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

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