/* CSS Variables */
:root {
    --primary-color: #00A3FF;
    --secondary-color: #0ea5e9;
    --background-dark: #1A1A1A;
    --background-light: #1A1A1A;
    --text-primary: #E5E5E5;
    --text-secondary: #a0a0a0;
    --accent-color: #00A3FF;
    --border-color: #333;
    --success-color: #4ade80;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    --navbar-bg: rgba(26, 26, 26, 0.7);
    --navbar-bg-scrolled: rgba(26, 26, 26, 0.95);
    --section-divider: rgba(0, 163, 255, 0.1);
}

/* Light Mode Variables */
[data-theme="light"] {
    --primary-color: #00A3FF;
    --secondary-color: #0284c7;
    --background-dark: #ffffff;
    --background-light: #f5f5f5;
    --text-primary: #1a1a1a;
    --text-secondary: #666666;
    --accent-color: #00A3FF;
    --border-color: #e0e0e0;
    --success-color: #22c55e;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.2);
    --navbar-bg: rgba(255, 255, 255, 0.7);
    --navbar-bg-scrolled: rgba(255, 255, 255, 0.95);
    --section-divider: rgba(0, 163, 255, 0.15);
}

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

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
    background-color: var(--background-dark);
    color: var(--text-primary);
    line-height: 1.6;
    position: relative;
    overflow-x: hidden;
    transition: background-color var(--transition-normal), color var(--transition-normal);
    font-size: 15px;
    font-weight: 400;
}

/* Canvas for Cursor Trail */
#cursorCanvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 9999;
}

/* Home Link */
.home-link {
    position: fixed;
    top: 2rem;
    left: 2rem;
    z-index: 1000;
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
    transition: all var(--transition-normal);
    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

.home-link:hover {
    color: var(--primary-color);
    transform: scale(1.1);
}

/* Theme Toggle */
.theme-toggle {
    position: fixed;
    top: 2rem;
    right: 2rem;
    z-index: 1000;
    background: transparent;
    border: none;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-normal);
    overflow: hidden;
    padding: 0;
}

.theme-toggle:hover {
    transform: rotate(20deg) scale(1.1);
    background: var(--primary-color);
}

.theme-toggle:hover svg {
    color: var(--background-dark);
}

.theme-toggle svg {
    position: absolute;
    transition: all var(--transition-normal);
    color: var(--text-primary);
}

.sun-icon {
    opacity: 1;
    transform: rotate(0deg) scale(1);
}

.moon-icon {
    opacity: 0;
    transform: rotate(180deg) scale(0);
}

[data-theme="light"] .sun-icon {
    opacity: 0;
    transform: rotate(-180deg) scale(0);
}

[data-theme="light"] .moon-icon {
    opacity: 1;
    transform: rotate(0deg) scale(1);
}

[data-theme="light"] .theme-toggle:hover svg {
    color: #ffffff;
}

/* Hero Section */
.hero {
    min-height: 90vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 2rem 1.5rem;
    background: var(--background-dark);
    transition: background var(--transition-normal);
}

.hero-content {
    text-align: center;
    z-index: 1;
    animation: fadeInUp 1s ease;
    position: relative;
}

.hero-title {
    font-size: clamp(2.2rem, 7vw, 4rem);
    margin-bottom: 0.8rem;
    font-weight: 700;
    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

.glitch {
    position: relative;
    color: var(--text-primary);
    animation: fadeIn 1s ease;
    transition: color var(--transition-normal);
}

.glitch::before,
.glitch::after {
    display: none;
}

.hero-subtitle {
    font-size: clamp(1rem, 2.5vw, 1.5rem);
    color: var(--primary-color);
    margin-bottom: 0.8rem;
    font-weight: 500;
    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

.hero-description {
    font-size: clamp(0.9rem, 1.8vw, 1.1rem);
    color: var(--text-secondary);
    margin-bottom: 1.8rem;
    max-width: 550px;
    margin-left: auto;
    margin-right: auto;
    font-weight: 400;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    padding: 0.7rem 1.8rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
    transition: all var(--transition-normal);
    display: inline-block;
    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

.btn-primary {
    background: var(--primary-color);
    color: var(--background-dark);
    box-shadow: 0 4px 15px rgba(0, 163, 255, 0.3);
}

[data-theme="light"] .btn-primary {
    color: #ffffff;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 163, 255, 0.5);
}

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

.btn-secondary:hover {
    background: var(--primary-color);
    transform: translateY(-2px);
}

[data-theme="light"] .btn-secondary:hover {
    color: #ffffff;
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    animation: float 2s ease-in-out infinite;
    z-index: 1;
}

.mouse {
    width: 30px;
    height: 50px;
    border-radius: 20px;
    position: relative;
    background: transparent;
}

.mouse::before {
    content: '';
    position: absolute;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 10px;
    background: var(--primary-color);
    border-radius: 2px;
    animation: scroll 2s ease-in-out infinite;
}

/* Sections */
.section {
    padding: 4rem 1.5rem;
    position: relative;
}

.section::before {
    display: none;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 2rem;
}

.section-title {
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    text-align: center;
    margin-bottom: 2.5rem;
    position: relative;
    display: inline-block;
    width: 100%;
    color: var(--text-primary);
    font-weight: 700;
    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

.section-title::after {
    display: none;
}

/* About Section */
.about {
    background: var(--background-dark);
    transition: background-color var(--transition-normal);
}

.about-content {
    max-width: 750px;
    margin: 0 auto;
}

.about-text p {
    margin-bottom: 1.2rem;
    font-size: 0.95rem;
    line-height: 1.7;
    color: var(--text-secondary);
    font-weight: 400;
}

.inline-link {
    color: var(--primary-color);
    text-decoration: none;
    transition: opacity var(--transition-fast);
}

.inline-link:hover {
    opacity: 0.7;
}

.inline-link-btn {
    background: none;
    border: none;
    color: var(--primary-color);
    text-decoration: none;
    transition: opacity var(--transition-fast);
    cursor: pointer;
    font-size: inherit;
    font-family: inherit;
    padding: 0;
    display: inline;
    position: relative;
}

.inline-link-btn:hover {
    opacity: 0.7;
}

/* Skills Section */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.skill-category {
    background: transparent;
    padding: 1.5rem;
    padding-left: 0;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.skill-category-title {
    font-size: 1.1rem;
    margin-bottom: 0.8rem;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

.skill-icon {
    font-size: 1.4rem;
}

.skill-list {
    list-style: none;
}

.skill-list li {
    padding: 0.4rem 0;
    color: var(--text-secondary);
    position: relative;
    padding-left: 1.5rem;
    font-size: 0.9rem;
    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
    font-weight: 400;
}

.skill-list li::before {
    content: '▹';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

/* Experience Section */
.experience {
    background: var(--background-dark);
    transition: background-color var(--transition-normal);
}

.timeline {
    position: relative;
    padding: 1.5rem 0;
}

.timeline-item {
    position: relative;
    padding-left: 0;
    margin-bottom: 2.5rem;
}

.timeline-marker {
    display: none;
}

.timeline-content {
    background: transparent;
    padding: 1.5rem;
    padding-left: 0;
    transition: all var(--transition-normal);
}

.timeline-title {
    font-size: 1.2rem;
    color: var(--primary-color);
    margin-bottom: 0.4rem;
    font-weight: 600;
    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

.timeline-date {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-bottom: 0.8rem;
    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
    font-weight: 400;
}

.timeline-description {
    margin-bottom: 0.8rem;
    line-height: 1.6;
    font-size: 0.9rem;
    font-weight: 400;
}

.timeline-details {
    list-style: none;
}

.timeline-details li {
    padding: 0.4rem 0;
    color: var(--text-secondary);
    position: relative;
    padding-left: 1.5rem;
    line-height: 1.6;
    font-size: 0.88rem;
    font-weight: 400;
}

.timeline-details li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-size: 1.2rem;
}

.timeline-details strong {
    color: var(--primary-color);
    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
    font-weight: 600;
}

/* Education Section */
.education {
    background: var(--background-dark);
    transition: background-color var(--transition-normal);
}

.education-grid {
    display: grid;
    gap: 3rem;
}

.education-card {
    background: transparent;
    padding: 2rem;
    padding-left: 0;
    transition: all var(--transition-normal);
}

.education-card h3 {
    font-size: 1.4rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    font-weight: 600;
    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

.education-institution {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 0.4rem;
    font-weight: 400;
}

.education-date {
    color: var(--text-secondary);
    margin-bottom: 1.2rem;
    font-size: 0.9rem;
    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
    font-weight: 400;
}

.education-achievements h4 {
    color: var(--primary-color);
    margin: 1.2rem 0 0.8rem;
    font-size: 1rem;
    font-weight: 600;
    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

.results-dropdown {
    margin: 1.2rem 0 0;
}

.results-dropdown summary {
    color: var(--primary-color);
    font-size: 1rem;
    font-weight: 600;
    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
    cursor: pointer;
    list-style: none;
    padding: 0.5rem 0;
    transition: opacity var(--transition-fast);
}

.results-dropdown summary::-webkit-details-marker {
    display: none;
}

.results-dropdown summary::before {
    content: '▸ ';
    display: inline-block;
    transition: transform var(--transition-fast);
}

.results-dropdown[open] summary::before {
    transform: rotate(90deg);
}

.results-dropdown summary:hover {
    opacity: 0.7;
}

.results-dropdown ul {
    margin-top: 0.8rem;
    animation: fadeIn 0.3s ease;
}

.education-achievements ul {
    list-style: none;
}

.education-achievements li {
    padding: 0.4rem 0;
    color: var(--text-secondary);
    position: relative;
    padding-left: 1.5rem;
    font-size: 0.88rem;
    font-weight: 400;
}

.education-achievements li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--success-color);
    font-weight: bold;
}

.education-achievements strong {
    color: var(--success-color);
    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
    font-weight: 600;
}

.certifications {
    background: transparent;
    padding: 2rem;
    padding-left: 0;
    transition: all var(--transition-normal);
}

.certifications h3 {
    font-size: 1.4rem;
    color: var(--primary-color);
    margin-bottom: 1.2rem;
    font-weight: 600;
    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

.cert-grid {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
    margin-top: 1.5rem;
}

.cert-badge {
    display: block;
    width: 120px;
    height: 120px;
    transition: all var(--transition-normal);
    border-radius: 8px;
    overflow: hidden;
    position: relative;
}

.cert-badge img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: all var(--transition-normal);
    filter: brightness(1);
}

.cert-badge:hover {
    transform: translateY(-8px) rotate(2deg);
}

.cert-badge:hover img {
    filter: brightness(1.1);
}

.cert-badge:active {
    transform: translateY(-4px) rotate(1deg);
}

/* Contact Section */
.contact {
    background: var(--background-dark);
    transition: background-color var(--transition-normal);
    padding: 2rem 1.5rem;
}

.contact-container {
    max-width: 400px;
}

.contact-content {
    text-align: center;
    max-width: 100%;
    margin: 0 auto;
}

.contact-text {
    font-size: 1rem;
    margin-bottom: 2rem;
    color: var(--text-secondary);
    font-weight: 400;
}

.contact-methods {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    flex-wrap: wrap;
    margin-top: 1rem;
}

.contact-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background: transparent;
    border-radius: 50%;
    text-decoration: none;
    color: var(--text-primary);
    transition: all var(--transition-normal);
    position: relative;
    cursor: pointer;
}

.contact-link svg {
    width: 22px;
    height: 22px;
    transition: all var(--transition-normal);
}

.contact-link:hover {
    background: var(--primary-color);
    transform: translateY(-3px);
    box-shadow: 0 4px 12px rgba(0, 163, 255, 0.3);
}

.contact-link:hover svg {
    stroke: var(--background-dark);
}

[data-theme="light"] .contact-link:hover svg {
    stroke: #ffffff;
}

/* Email Copy Button */
.email-copy-btn {
    position: relative;
}

.email-tooltip {
    position: absolute;
    bottom: -45px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--background-light);
    color: var(--text-primary);
    padding: 0.5rem 0.8rem;
    border-radius: 6px;
    font-size: 0.8rem;
    white-space: nowrap;
    opacity: 1;
    pointer-events: none;
    transition: all var(--transition-normal);
    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

.email-copy-btn:hover .email-tooltip {
    opacity: 1;
}

.email-tooltip::after {
    content: '';
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 0;
}

.email-tooltip.copied {
    background: var(--primary-color);
    color: #ffffff;
}

.email-tooltip.copied::after {
    display: none;
}

.contact-icon {
    display: none;
}

/* Footer */
.footer {
    background: var(--background-dark);
    padding: 1.5rem;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 400;
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

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

@keyframes scroll {
    0% {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
    100% {
        opacity: 0;
        transform: translateX(-50%) translateY(20px);
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .timeline-item {
        padding-left: 0;
    }

    .contact-methods {
        flex-direction: row;
        align-items: center;
        justify-content: center;
    }

    .contact-link {
        width: 48px;
        height: 48px;
        flex-shrink: 0;
    }

    .cert-grid {
        gap: 1.5rem;
    }

    .cert-badge {
        width: 100px;
        height: 100px;
    }
}

@media (max-width: 480px) {
    .section {
        padding: 2.5rem 1rem;
    }

    .cert-grid {
        gap: 1rem;
    }

    .cert-badge {
        width: 90px;
        height: 90px;
    }
}