/* Modern minimalist styling with subtle animations */

/* CSS Custom Properties for Theme Support */
:root {
    --bg-primary: #fafafa;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f8f9fa;
    --text-primary: #2c3e50;
    --text-secondary: #34495e;
    --text-muted: #7f8c8d;
    --text-accent: #95a5a6;
    --border-light: #e8e8e8;
    --border-medium: #bdc3c7;
    --border-card: #e1e8ed;
    --shadow-light: rgba(0, 0, 0, 0.05);
    --shadow-medium: rgba(0, 0, 0, 0.1);
    --shadow-heavy: rgba(0, 0, 0, 0.15);
    --accent-blue: #3498db;
    --accent-blue-dark: #2980b9;
    --accent-green: #27ae60;
    --accent-red: #e74c3c;
    --accent-purple: #9b59b6;
    --gradient-bg-opacity: 0.03;
}

[data-theme="dark"] {
    --bg-primary: #121212;
    --bg-secondary: #1e1e1e;
    --bg-tertiary: #242424;
    --text-primary: #ffffff;
    --text-secondary: #e0e0e0;
    --text-muted: #a0a0a0;
    --text-accent: #888888;
    --border-light: #333333;
    --border-medium: #444444;
    --border-card: #333333;
    --shadow-light: rgba(0, 0, 0, 0.3);
    --shadow-medium: rgba(0, 0, 0, 0.4);
    --shadow-heavy: rgba(0, 0, 0, 0.5);
    --accent-blue: #64b5f6;
    --accent-blue-dark: #42a5f5;
    --accent-green: #81c784;
    --accent-red: #e57373;
    --accent-purple: #ba68c8;
    --gradient-bg-opacity: 0.06;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    padding: 0;
    background: var(--bg-primary);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    position: relative;
    overflow-x: hidden;
    transition: background-color 0.3s ease, color 0.3s ease;
}



/* Subtle animated background */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 80%, rgba(120, 119, 198, var(--gradient-bg-opacity)) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(79, 172, 254, var(--gradient-bg-opacity)) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(139, 92, 246, calc(var(--gradient-bg-opacity) * 0.7)) 0%, transparent 50%);
    animation: backgroundMove 20s ease-in-out infinite;
    z-index: -1;
}

@keyframes backgroundMove {
    0%, 100% { 
        transform: translateX(0px) translateY(0px) scale(1);
    }
    25% { 
        transform: translateX(-5px) translateY(-10px) scale(1.02);
    }
    50% { 
        transform: translateX(10px) translateY(-5px) scale(0.98);
    }
    75% { 
        transform: translateX(-8px) translateY(10px) scale(1.01);
    }
}

/* Layout */
.container {
    margin-left: auto;
    margin-right: auto;
    padding-left: 20px;
    padding-right: 20px;
    max-width: 1000px;
    animation: fadeIn 0.8s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (min-width: 992px) {
    .container {
        width: 970px;
        padding-left: 15px;
        padding-right: 15px;
    }
}

.row {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 0 20px;
}

/* Header Section */
#dhead {
    margin-top: 40px;
    margin-bottom: 60px;
}

#dhead .row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 40px;
    max-width: 800px;
    margin: 0 auto;
}

#dpic {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

#ddesc {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
    min-width: 0;
}

@media (max-width: 991px) {
    #dhead .row {
        flex-direction: column;
        text-align: center;
        gap: 30px;
    }
    #ddesc {
        align-items: center;
    }
}

h1 {
    font-size: 42px;
    font-weight: 300;
    padding: 0;
    margin: 0 0 10px 0;
    letter-spacing: -0.5px;
    color: var(--text-primary);
    transition: color 0.3s ease;
    position: relative;
}

/* Pronunciation Tooltip */
h1.pronunciation-tooltip {
    cursor: pointer;
    transition: color 0.3s ease, opacity 0.3s ease;
}

h1.pronunciation-tooltip:hover {
    opacity: 0.8;
}

h1.pronunciation-tooltip::before {
    content: attr(data-pronunciation);
    position: absolute;
    top: 110%;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--text-primary);
    color: var(--bg-primary);
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 16px;
    font-weight: 400;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px var(--shadow-medium);
    z-index: 1000;
}

h1.pronunciation-tooltip::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 5px solid transparent;
    border-bottom-color: var(--text-primary);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

h1.pronunciation-tooltip:hover::before,
h1.pronunciation-tooltip:hover::after {
    opacity: 1;
    visibility: visible;
}

h2 {
    font-weight: 300;
    font-style: italic;
    color: var(--text-muted);
    font-size: 20px;
    padding: 0;
    margin: 0 0 25px 0;
    line-height: 1.4;
}

@media (min-width: 992px) {
    h2 {
        max-width: 350px;
    }
}

#dpic img {
    width: 200px;
    height: 200px;
    border-radius: 100px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

#dpic img:hover {
    transform: scale(1.05);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
}

/* Social Icons */
#dico {
    display: flex;
    gap: 15px;
    margin-top: 5px;
}

@media (max-width: 991px) {
    #dico {
        justify-content: center;
    }
}

/* Social Media Icons */
.iico {
    font-size: 42px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
    text-decoration: none;
    transition: all 0.3s ease;
}

.iico-resume {
    font-size: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
    text-decoration: none;
    transition: all 0.3s ease;
}

.iico-resume:hover {
    transform: translateY(-3px);
    color: var(--accent-green);
}

.iico:hover {
    transform: translateY(-3px);
    color: var(--accent-blue);
}

/* Specific colors for different social media platforms */
.fa-twitter:hover {
    color: #1da1f2;
}

.fa-github:hover {
    color: var(--text-primary);
}

.fa-medium:hover {
    color: #00ab6c;
}

.fa-linkedin:hover {
    color: #0077b5;
}

/* Email Links - Make them more visible in dark mode */
a[href^="mailto:"]{
    color: var(--accent-blue) !important;
    font-weight: 500;
    text-decoration: none;
    border-bottom: 2px solid transparent;
    transition: all 0.2s ease;
    padding: 2px 4px;
    border-radius: 4px;
}

a[href^="mailto:"]:hover {
    color: var(--accent-blue-dark) !important;
    background-color: rgba(100, 181, 246, 0.1);
    border-bottom-color: var(--accent-blue);
}

#demail {
    margin-top: 15px;
    color: var(--text-muted);
    opacity: 0;
    transition: opacity 0.7s ease;
    font-size: 14px;
    line-height: 1.5;
}

/* Theme Toggle Button */
.theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
    background: var(--bg-secondary);
    border: 2px solid var(--border-medium);
    border-radius: 50%;
    width: 44px;
    height: 44px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    color: var(--text-primary);
    box-shadow: 0 2px 8px var(--shadow-medium);
}

.theme-toggle:hover {
    transform: translateY(-2px);
    border-color: var(--accent-blue);
    box-shadow: 0 4px 12px var(--shadow-medium);
}

.theme-toggle:focus {
    outline: 2px solid var(--accent-blue);
    outline-offset: 2px;
}

.theme-toggle-icon {
    width: 20px;
    height: 20px;
    transition: transform 0.3s ease;
}

.theme-toggle:hover .theme-toggle-icon {
    transform: rotate(15deg);
}

/* Info Icon Toggle */
.info-toggle {
    position: fixed;
    top: 20px;
    left: 20px;
    z-index: 1000;
    background: var(--bg-secondary);
    border: 2px solid var(--border-medium);
    border-radius: 50%;
    width: 44px;
    height: 44px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    color: var(--text-primary);
    box-shadow: 0 2px 8px var(--shadow-medium);
}

.info-toggle:hover {
    transform: translateY(-2px);
    border-color: var(--accent-blue);
    box-shadow: 0 4px 12px var(--shadow-medium);
}

.info-toggle:focus {
    outline: 2px solid var(--accent-blue);
    outline-offset: 2px;
}

.info-icon {
    width: 20px;
    height: 20px;
    transition: transform 0.3s ease;
    filter: drop-shadow(0 1px 2px var(--shadow-light));
    color: var(--text-primary) !important;
}

.info-toggle:hover .info-icon {
    transform: scale(1.1);
    filter: drop-shadow(0 2px 4px var(--shadow-medium));
}

.info-tooltip {
    position: absolute;
    top: 50%;
    left: 100%;
    transform: translateY(-50%);
    margin-left: 10px;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.3s ease;
    pointer-events: none;
}

.info-toggle:hover .info-tooltip {
    opacity: 1;
    visibility: visible;
    transform: translateY(-50%) translateX(5px);
}

.info-tooltiptext {
    background-color: var(--text-primary);
    color: var(--bg-primary);
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 12px;
    white-space: nowrap;
    box-shadow: 0 2px 8px var(--shadow-medium);
    position: relative;
}

.info-tooltiptext::before {
    content: '';
    position: absolute;
    top: 50%;
    left: -5px;
    transform: translateY(-50%);
    width: 0;
    height: 0;
    border-top: 5px solid transparent;
    border-bottom: 5px solid transparent;
    border-right: 5px solid var(--text-primary);
}

/* Divider */
hr {
    height: 1px;
    background: linear-gradient(to right, transparent, var(--border-medium), transparent);
    padding: 0;
    margin: 50px 0;
    border: 0;
    transition: background 0.3s ease;
}

/* Timeline Section */
#history {
    margin-bottom: 60px;
}

.ico {
    grid-column: span 1;
    vertical-align: top;
    border-left: 2px solid var(--border-light);
    position: relative;
    transition: border-color 0.3s ease;
}

.ico:hover {
    border-left-color: var(--border-medium);
}

.ico img {
    border-radius: 8px;
    width: 100%;
    max-width: 70px;
    margin-left: 12px;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    box-shadow: 0 2px 8px var(--shadow-medium);
}

.ico img:hover {
    transform: scale(1.1);
    box-shadow: 0 4px 16px var(--shadow-heavy);
}

.desc {
    grid-column: span 10;
    vertical-align: top;
    font-size: 16px;
    padding-left: 25px;
    padding-bottom: 35px;
    line-height: 1.7;
    color: var(--text-secondary);
}

.desc a {
    color: var(--accent-blue);
    text-decoration: none;
    transition: color 0.2s ease;
    border-bottom: 1px solid transparent;
}

.desc a:hover {
    color: var(--accent-blue-dark);
    border-bottom-color: var(--accent-blue);
}

.entry {
    transition: transform 0.2s ease;
    margin-bottom: 10px;
}

.entry:hover {
    transform: translateX(5px);
}

.entry-dot {
    position: absolute;
    top: 5px;
    left: -8px;
    width: 12px;
    height: 12px;
    border-radius: 6px;
    background-color: var(--border-light);
    border: 3px solid var(--bg-primary);
    transition: background-color 0.3s ease, transform 0.2s ease;
    box-shadow: 0 2px 4px var(--shadow-medium);
}

.entry:hover .entry-dot {
    background-color: var(--accent-blue);
    transform: scale(1.2);
}

.timespan {
    grid-column: span 1;
    font-size: 13px;
    text-align: right;
    padding-right: 8px;
    color: var(--text-accent);
    font-weight: 500;
    letter-spacing: 0.5px;
}

/* Section Titles */
.ctitle {
    font-size: 32px;
    margin-bottom: 30px;
    margin-top: 50px;
    font-weight: 300;
    color: var(--text-primary);
    letter-spacing: -0.5px;
    position: relative;
    padding-bottom: 10px;
    transition: color 0.3s ease;
}

.ctitle::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 2px;
    background: linear-gradient(to right, var(--accent-blue), var(--accent-purple));
    border-radius: 1px;
}

/* About Me Section */
#about {
    margin-bottom: 50px;
}

.about-content {
    padding: 0;
}

.about-content p {
    font-size: 16px;
    line-height: 1.7;
    color: var(--text-secondary);
    margin-bottom: 20px;
    transition: color 0.3s ease;
}

.about-content p:last-child {
    margin-bottom: 0;
}

@media (max-width: 768px) {
    .about-content p {
        font-size: 15px;
        line-height: 1.6;
    }
}

/* Writing Section Background */
.writing-section {
    padding-top: 1px;
    margin-top: 50px;
    padding-bottom: 30px;
    transition: background-color 0.3s ease;
    position: relative;
}

/* Featured Writing Section */
.nodot {
    list-style-type: none;
    padding-left: 0;
}

.nodot li {
    padding: 8px 0;
    border-bottom: 1px solid var(--border-light);
    transition: padding-left 0.2s ease, background-color 0.2s ease;
}

.nodot li:hover {
    padding-left: 10px;
    background-color: var(--bg-tertiary);
}

.nodot a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s ease;
}

.nodot a:hover {
    color: var(--accent-blue);
}

/* Projects Section */
.project {
    margin-bottom: 20px;
    padding: 20px 0;
    border-bottom: 1px solid var(--border-light);
    transition: transform 0.2s ease, background-color 0.2s ease;
    border-radius: 8px;
    padding-left: 10px;
    padding-right: 10px;
}

.project:hover {
    transform: translateY(-2px);
    background-color: var(--bg-tertiary);
    box-shadow: 0 4px 12px var(--shadow-light);
}

.pico {
    float: left;
    margin-right: 15px;
}

.pico img {
    height: 70px;
    width: 70px;
    border-radius: 8px;
    border: 1px solid var(--border-card);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    object-fit: cover;
}

.pico img:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 12px var(--shadow-medium);
}

.pdesc {
    line-height: 1.6;
    color: var(--text-secondary);
}

.pdesc a {
    color: var(--accent-blue);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s ease;
}

.pdesc a:hover {
    color: var(--accent-blue-dark);
}

.pend {
    clear: both;
}

/* Publications Section */
.pub {
    font-size: 14px;
    border-left: 4px solid var(--border-medium);
    padding: 12px 0 12px 15px;
    margin-bottom: 15px;
    transition: border-color 0.3s ease, background-color 0.2s ease;
    background-color: var(--bg-secondary);
    border-radius: 0 4px 4px 0;
}

.pub:hover {
    border-left-color: var(--accent-blue);
    background-color: var(--bg-tertiary);
}

.pub-title {
    display: inline;
    color: var(--text-primary);
    line-height: 1.5;
}

.pub-title a {
    color: var(--text-primary);
    text-decoration: none;
    transition: color 0.2s ease;
}

.pub-title a:hover {
    color: var(--accent-blue);
}

.pub-venue {
    display: inline;
    color: var(--accent-green);
    font-weight: 500;
}

.pub-authors {
    display: block;
    color: var(--accent-red);
    margin-top: 5px;
    font-style: italic;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .container {
        padding-left: 15px;
        padding-right: 15px;
    }
    
    .row {
        gap: 0 10px;
    }
    
    h1 {
        font-size: 36px;
    }
    
    h2 {
        font-size: 18px;
    }
    
    .ctitle {
        font-size: 28px;
        margin-top: 40px;
    }
    
    #dpic img {
        width: 180px;
        height: 180px;
        border-radius: 90px;
    }
    
    .desc {
        font-size: 15px;
        padding-left: 20px;
    }
    
    .project {
        padding-left: 5px;
        padding-right: 5px;
    }
}

/* Smooth scrolling enhancement */
html {
    scroll-padding-top: 20px;
}

/* Focus states for accessibility */
a:focus,
button:focus {
    outline: 2px solid var(--accent-blue);
    outline-offset: 2px;
}

/* Additional utility classes */
.hassets {
    position: relative;
}

@media (max-width: 991px) {
    .hassets {
        display: none;
    }
}

.hasset {
    position: absolute;
    margin: 0;
    padding: 0;
}

.card {
    grid-column: span 3;
    vertical-align: top;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-card);
    border-radius: 8px;
    padding: 15px;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    box-shadow: 0 2px 8px var(--shadow-light);
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px var(--shadow-medium);
}

@media (max-width: 991px) {
    .card {
        grid-column: span 6;
    }
}

.card img {
    border-radius: 6px;
    width: 100%;
    transition: transform 0.2s ease;
}

.card img:hover {
    transform: scale(1.02);
}

.cdesc {
    height: auto;
    min-height: 30px;
    vertical-align: top;
    margin-bottom: 10px;
    font-size: 15px;
    line-height: 1.5;
    color: var(--text-secondary);
}

@media (max-width: 768px) {
    .cdesc {
        font-size: 14px;
        padding-bottom: 10px;
    }
}

.tul {
    text-align: center;
    padding: 0;
}

.til {
    display: inline-block;
    padding: 8px 18px;
    margin-bottom: 8px;
    transition: background-color 0.2s ease;
}

.til:hover {
    background-color: var(--bg-tertiary);
}

.tilb {
    border-right: 1px solid var(--border-card);
}

/* Contact Form Styles */
.contact-content {
    max-width: 500px;
}

.contact-content p {
    margin-bottom: 20px;
    color: var(--text-secondary);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.contact-form input,
.contact-form textarea {
    padding: 12px;
    border: 1px solid var(--border-light);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 16px;
    font-family: inherit;
    border-radius: 4px;
    transition: border-color 0.3s ease, background-color 0.3s ease;
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--border-medium);
}

.contact-form textarea {
    resize: vertical;
    min-height: 100px;
}

.contact-form button {
    padding: 12px 24px;
    background: var(--text-primary);
    color: var(--bg-primary);
    border: none;
    font-size: 16px;
    font-family: inherit;
    cursor: pointer;
    border-radius: 4px;
    transition: background-color 0.3s ease, transform 0.2s ease;
    align-self: flex-start;
}

.contact-form button:hover {
    background: var(--text-secondary);
    transform: translateY(-1px);
}

.contact-form button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

#formStatus {
    padding: 10px;
    border-radius: 4px;
    font-size: 14px;
}

#formStatus.success {
    background: rgba(39, 174, 96, 0.1);
    color: var(--accent-green);
}

#formStatus.error {
    background: rgba(231, 76, 60, 0.1);
    color: var(--accent-red);
}