/* Polished Minimal Styles with Theming */
:root {
    --bg-color: #ffffff;
    --text-color: #222222;
    --text-muted: #666666;
    --text-dim: #888888;
    --link-color: #1a0dab;
    --border-color: #eeeeee;
    --nav-bg: rgba(255, 255, 255, 0.95);
    --badge-bg: #f5f5f5;
    --badge-text: #555555;
    --accent-color: #1a0dab;
}

[data-theme="dark"] {
    --bg-color: #121212;
    --text-color: #e0e0e0;
    --text-muted: #b0b0b0;
    --text-dim: #808080;
    --link-color: #8ab4f8;
    --border-color: #333333;
    --nav-bg: rgba(18, 18, 18, 0.95);
    --badge-bg: #2d2d2d;
    --badge-text: #cccccc;
    --accent-color: #8ab4f8;
}

html, body {
    height: 100%;
    overflow: hidden;
}

body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    color: var(--text-color);
    background-color: var(--bg-color);
    line-height: 1.5;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    transition: background-color 0.3s, color 0.3s;
}

/* Navbar */
.navbar {
    flex: 0 0 auto;
    background-color: var(--nav-bg);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    padding: 12px 0;
}

.nav-container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-links {
    display: flex;
    gap: 24px;
    align-items: center;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-muted);
    font-size: 13px;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    line-height: 1;
    transition: color 0.2s;
}

.nav-links svg {
    flex-shrink: 0;
    display: block;
}

.nav-links a:hover {
    color: var(--link-color);
    text-decoration: underline;
}

.nav-links a.nav-email:hover { color: #ea4335; }
.nav-links a.nav-github:hover { color: #333; }
[data-theme="dark"] .nav-links a.nav-github:hover { color: #f0f6fc; }
.nav-links a.nav-linkedin:hover { color: #0077b5; }
.nav-links a.nav-leetcode:hover { color: #ffa116; }
.nav-links a.nav-instagram:hover { color: #e4405f; }
.nav-links a.nav-youtube:hover { color: #ff0000; }
.nav-links a.nav-resume:hover { color: var(--accent-color); }

/* Download Button */
.btn-download {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-top: 15px;
    padding: 8px 16px;
    background-color: var(--accent-color);
    color: white !important;
    text-decoration: none;
    border-radius: 6px;
    font-size: 13px;
    font-weight: 500;
    transition: opacity 0.2s, transform 0.2s;
}

.btn-download:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}

.btn-download:active {
    transform: translateY(0);
}

[data-theme="dark"] .btn-download {
    color: #121212 !important;
}

/* Theme Toggle */
#theme-toggle {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-muted);
    padding: 6px;
    margin-left: 10px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: background-color 0.2s, color 0.2s;
}

#theme-toggle:hover {
    background-color: var(--badge-bg);
    color: var(--link-color);
}

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

.sun, .moon {
    transition: transform 0.3s ease;
}

#theme-toggle:active .sun, #theme-toggle:active .moon {
    transform: scale(0.8);
}

.container {
    flex: 1;
    display: grid;
    grid-template-columns: 200px 1fr 220px;
    max-width: 1100px;
    margin: 0 auto;
    padding: 20px;
    gap: 40px; /* Increased gap for better breathing room */
    overflow: hidden;
}

/* Independent Scrolling Columns */
.profile, .content, .extras {
    height: 100%;
    overflow-y: auto;
    padding-bottom: 50px;
    scrollbar-width: thin;
    scrollbar-color: var(--border-color) transparent;
}

.profile::-webkit-scrollbar, .content::-webkit-scrollbar, .extras::-webkit-scrollbar {
    width: 4px;
}

.profile::-webkit-scrollbar-thumb, .content::-webkit-scrollbar-thumb, .extras::-webkit-scrollbar-thumb {
    background-color: var(--border-color);
    border-radius: 10px;
}

/* Profile Sidebar (Left) */
.profile {
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.profile-fixed {
    flex: 0 0 auto;
    padding-bottom: 20px;
    background-color: var(--bg-color);
    z-index: 10;
}

.work-journey {
    flex: 1;
    overflow-y: auto;
    padding-right: 10px;
}

.profile-image img {
    width: 140px;
    height: 140px;
    border-radius: 4px;
    object-fit: cover;
    border: 1px solid var(--border-color);
    margin-bottom: 20px;
}

.profile-info h1 {
    font-size: 22px;
    margin: 0 0 5px 0;
    color: var(--text-color);
}

.affiliation {
    color: var(--text-muted);
    font-size: 15px;
    margin: 0 0 8px 0;
}

.location {
    font-size: 13px;
    color: var(--text-dim);
    margin: 0 0 15px 0;
}

.short-about {
    font-size: 13px;
    color: var(--text-muted);
    line-height: 1.5;
    border-left: 2px solid var(--accent-color);
    padding-left: 12px;
}

.work-journey h3 {
    font-size: 11px;
    text-transform: uppercase;
    color: var(--text-dim);
    letter-spacing: 1.2px;
    margin-bottom: 15px;
    position: sticky;
    top: 0;
    background-color: var(--bg-color);
    padding: 10px 0 5px 0;
    z-index: 5;
}

.timeline-card {
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 12px;
    margin-bottom: 12px;
    cursor: pointer;
    transition: transform 0.2s, border-color 0.2s, box-shadow 0.2s;
}

.timeline-card:hover {
    border-color: var(--link-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

[data-theme="dark"] .timeline-card:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.exp-company {
    font-size: 13px;
    font-weight: bold;
    color: var(--text-color);
    display: block;
}

.exp-role {
    font-size: 12px;
    color: var(--link-color);
    margin: 2px 0;
}

.exp-period {
    font-size: 11px;
    color: var(--text-dim);
}

/* Modal Styles */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    backdrop-filter: blur(2px);
}

.modal-content {
    background-color: var(--bg-color);
    max-width: 600px;
    width: 90%;
    max-height: 85vh;
    padding: 30px;
    border-radius: 12px;
    position: relative;
    overflow-y: auto;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    color: var(--text-color);
}

#modal-close {
    position: absolute;
    top: 15px;
    right: 20px;
    background: none;
    border: none;
    font-size: 24px;
    color: var(--text-dim);
    cursor: pointer;
}

#modal-close:hover {
    color: var(--text-color);
}

#modal-body h2 {
    font-size: 20px;
    margin-top: 0;
    color: var(--link-color);
}

#modal-body .modal-meta {
    font-size: 14px;
    color: var(--text-dim);
    margin-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 10px;
}

#modal-body .modal-desc {
    font-size: 15px;
    line-height: 1.6;
    margin-bottom: 25px;
}

/* Main Content (Middle) */
.content {
    border-right: 1px solid var(--border-color);
    padding-right: 40px; /* Matched to the new gap */
}

.content h2 {
    font-size: 18px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 8px;
    margin-top: 0;
    margin-bottom: 20px;
    color: var(--text-color);
}

section {
    margin-bottom: 40px;
}

/* Badges */
.badge-container {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-top: 8px;
}

.badge {
    background-color: var(--badge-bg);
    color: var(--badge-text);
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 500;
}

/* Project & Experience Items */
.project-item {
    background-color: var(--bg-color);
    border-bottom: 1px solid var(--border-color); /* More like a list of papers */
    padding: 15px 0;
    margin-bottom: 10px;
}

.timeline-card {
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 12px;
    margin-bottom: 12px;
    cursor: pointer;
    transition: transform 0.2s, border-color 0.2s, box-shadow 0.2s;
}

.timeline-card:hover {
    border-color: var(--link-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.timeline-card:hover .exp-company {
    text-decoration: underline;
    color: var(--link-color);
}

.project-header-row {
    display: flex;
    justify-content: flex-start;
    align-items: baseline;
    gap: 12px;
}

.project-title {
    font-size: 16px;
    font-weight: 500;
    color: var(--link-color);
    text-decoration: none;
}

.project-title:hover {
    text-decoration: underline;
}

.live-link {
    font-size: 12px;
    font-weight: bold;
    color: #006621; /* Academic green often used for versions */
    text-decoration: none;
    border: 1px solid #006621;
    padding: 1px 6px;
    border-radius: 3px;
    text-transform: uppercase;
}

[data-theme="dark"] .live-link {
    color: #4ecb71;
    border-color: #4ecb71;
}

.live-link:hover {
    background-color: #006621;
    color: #fff;
}

[data-theme="dark"] .live-link:hover {
    background-color: #4ecb71;
    color: #121212;
}

.project-desc, .exp-desc {
    font-size: 14px;
    color: var(--text-muted);
    margin: 6px 0;
}

.project-year, .exp-period {
    font-size: 12px;
    color: var(--text-dim);
}

/* Extras Sidebar (Right) */
.extras h2 {
    font-size: 14px;
    text-transform: uppercase;
    color: var(--text-dim);
    letter-spacing: 1px;
}

.education-item {
    margin-bottom: 20px;
}

.edu-title {
    font-size: 14px;
    font-weight: bold;
}

.edu-year {
    font-size: 12px;
    color: var(--text-dim);
}

.edu-desc {
    font-size: 13px;
    color: var(--text-muted);
    margin: 2px 0;
}

.achievements-list {
    padding-left: 18px;
    margin: 0;
    font-size: 13px;
    color: var(--text-muted);
}

.achievements-list li {
    margin-bottom: 8px;
}

/* Mobile Header Elements (Hidden by default) */
.mobile-header-left, .mobile-only-btn {
    display: none;
}

/* Responsive */
@media (max-width: 992px) {
    .container { grid-template-columns: 200px 1fr; }
    .extras {
        grid-column: span 2;
        border-top: 1px solid var(--border-color);
        padding-top: 30px;
        display: grid;
        grid-template-columns: 1fr 1fr 1fr;
        gap: 20px;
        height: auto;
        overflow: visible;
    }
}

@media (max-width: 768px) {
    html, body { overflow: auto; height: auto; }
    
    .navbar {
        position: sticky;
        top: 0;
        width: 100%;
        padding: 8px 0;
    }

    .nav-container {
        padding: 0 15px;
        gap: 10px;
    }

    /* Mobile Profile in Header */
    .mobile-header-left {
        display: flex;
        align-items: center;
        gap: 10px;
        flex: 1;
    }

    .mobile-avatar {
        width: 32px;
        height: 32px;
        border-radius: 4px;
        object-fit: cover;
    }

    .mobile-profile-text {
        display: flex;
        flex-direction: column;
    }

    .mobile-name {
        font-size: 14px;
        font-weight: bold;
        line-height: 1.2;
    }

    .mobile-headline {
        font-size: 11px;
        color: var(--text-muted);
    }

    /* Toggles */
    .mobile-only-btn {
        display: flex;
        background: none;
        border: none;
        color: var(--text-muted);
        padding: 8px;
        cursor: pointer;
    }

    .nav-controls {
        display: flex;
        align-items: center;
    }

    /* Nav Links Dropdown */
    .nav-links-wrapper {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--bg-color);
        border-bottom: 1px solid var(--border-color);
        display: none;
        padding: 15px 0;
        z-index: 999;
        box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    }

    .nav-links-wrapper.active {
        display: block;
    }

    .nav-links {
        flex-direction: column;
        gap: 0;
        padding: 0;
    }

    .nav-links a {
        padding: 12px 20px;
        font-size: 14px;
        width: 100%;
        box-sizing: border-box;
    }

    /* Layout Restructuring */
    .container { 
        display: flex; 
        flex-direction: column; 
        padding: 15px;
        gap: 20px;
    }

    /* Hide Profile Sidebar default view, but allow toggle */
    .profile { 
        position: fixed;
        top: 0;
        left: -100%;
        width: 85%;
        height: 100%;
        background-color: var(--bg-color);
        z-index: 1001;
        transition: left 0.3s ease;
        padding: 20px;
        box-shadow: 4px 0 12px rgba(0,0,0,0.1);
        display: flex;
        flex-direction: column;
    }

    .profile.active {
        left: 0;
    }

    .profile-fixed {
        padding-bottom: 20px;
        border-bottom: 1px solid var(--border-color);
        margin-bottom: 20px;
    }

    .profile-image img {
        width: 100px;
        height: 100px;
    }

    .content { 
        border-right: none; 
        padding-right: 0; 
    }

    /* Extras as Footer */
    .extras { 
        display: block; 
        border-top: 1px solid var(--border-color);
        padding-top: 30px;
        margin-top: 20px;
    }

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