/* CSS Variables - Modern Dark Theme with Teal Accent */
:root {
    --bg-primary: #0a0e27;
    --bg-secondary: #0f1535;
    --bg-card: #141b3a;
    --bg-muted: #1a2247;
    --text-primary: #e8eef7;
    --text-secondary: #b4bcc8;
    --text-muted: #7a8293;
    --color-primary: #00d9ff;
    --color-primary-dark: #00a8cc;
    --color-secondary: #6366f1;
    --color-accent: #ec4899;
    --border-color: #1e2749;
    --radius: 0.75rem;
    --radius-lg: 1.25rem;
    --shadow-sm: 0 2px 8px rgba(0, 217, 255, 0.08);
    --shadow-md: 0 8px 24px rgba(0, 217, 255, 0.12);
    --shadow-lg: 0 16px 48px rgba(0, 217, 255, 0.15);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    font-weight: 400;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--color-primary);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-primary-dark);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.container-sm {
    max-width: 900px;
}

/* Header */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(10, 14, 39, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.site-header .container {
    padding: 1rem 1.5rem;
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 2rem;
}

.logo {
    font-size: 1.25rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-decoration: none;
    transition: all 0.3s ease;
}

.logo:hover {
    transform: scale(1.05);
}

.nav-right {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-right a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: all 0.3s ease;
    position: relative;
}

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

.nav-right a:hover {
    color: var(--color-primary);
}

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

/* Hero Section */
.hero-section {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    padding-top: 4rem;
}

.hero-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at 50% 0%, rgba(0, 217, 255, 0.08) 0%, transparent 70%);
    z-index: 1;
}

.hero-inner {
    position: relative;
    width: 100%;
    display: grid;
    gap: 3rem;
    align-items: center;
    grid-template-columns: 1fr;
    z-index: 2;
}

.hero-text {
    text-align: center;
    animation: fadeInUp 0.8s ease-out;
}

.hero-photo-col {
    display: flex;
    justify-content: center;
    animation: fadeInDown 0.8s ease-out;
}

@media (min-width: 880px) {
    .hero-inner {
        grid-template-columns: 1fr 420px;
    }
    .hero-text {
        text-align: left;
    }
    .hero-photo-col {
        justify-content: flex-end;
    }
}

.hero-title {
    font-size: clamp(2.5rem, 8vw, 5rem);
    font-weight: 800;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--color-primary) 50%, var(--color-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: clamp(1.1rem, 3vw, 1.4rem);
    color: var(--color-primary);
    margin-bottom: 1rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.hero-lead {
    max-width: 700px;
    color: var(--text-secondary);
    font-size: 1.05rem;
    margin: 1.5rem 0;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin: 2rem 0 2.5rem;
    justify-content: center;
}

@media (min-width: 880px) {
    .hero-buttons {
        justify-content: flex-start;
    }
}

.btn {
    padding: 0.875rem 1.75rem;
    border-radius: var(--radius);
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 1rem;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(45deg, transparent 30%, rgba(255, 255, 255, 0.1) 50%, transparent 70%);
    transform: translateX(-100%);
    transition: transform 0.6s ease;
}

.btn:hover::before {
    transform: translateX(100%);
}

.btn:focus-visible,
.social-link:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 3px;
    border-radius: calc(var(--radius) + 2px);
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: var(--bg-primary);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 32px rgba(0, 217, 255, 0.25);
}

.btn-outline {
    background: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

.btn-outline:hover {
    background: rgba(0, 217, 255, 0.1);
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.social-links {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
    justify-content: center;
}

@media (min-width: 880px) {
    .social-links {
        justify-content: flex-start;
    }
}

.social-link {
    padding: 0.75rem;
    background: rgba(20, 27, 58, 0.6);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    color: var(--text-secondary);
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
}

.social-link:hover {
    border-color: var(--color-primary);
    background: rgba(0, 217, 255, 0.15);
    color: var(--color-primary);
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
}

.scroll-box {
    width: 1.5rem;
    height: 2.5rem;
    border: 2px solid var(--color-primary);
    border-radius: 1.5rem;
    padding: 0.25rem;
}

.scroll-dot {
    width: 0.375rem;
    height: 0.75rem;
    background: var(--color-primary);
    border-radius: 0.375rem;
    animation: float 2s infinite;
}

/* Sections */
.section {
    padding: 5rem 1.5rem;
    position: relative;
}

.section-alt {
    background: rgba(15, 21, 53, 0.5);
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
    animation: fadeInUp 0.6s ease-out;
}

.section-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 800;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.01em;
}

.title-underline {
    width: 5rem;
    height: 3px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
    margin: 0 auto;
    border-radius: 2px;
    box-shadow: var(--shadow-md);
}

.section-subtitle {
    color: var(--text-secondary);
    font-size: 1.05rem;
    line-height: 1.8;
}

/* Card */
.card {
    background: rgba(20, 27, 58, 0.6);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.card:hover {
    border-color: var(--color-primary);
    background: rgba(20, 27, 58, 0.8);
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

/* About Section */
.about-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    align-items: center;
}

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

.about-left {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    animation: fadeInLeft 0.6s ease-out;
}

.about-right {
    animation: fadeInRight 0.6s ease-out;
}

.profile-photo-wrapper {
    display: flex;
    justify-content: center;
    margin-bottom: 0.5rem;
}

.profile-photo {
    width: 16rem;
    height: 16rem;
    border-radius: 50%;
    overflow: hidden;
    border: 3px solid var(--color-primary);
    transition: all 0.3s ease;
    background: var(--bg-card);
    box-shadow: 0 0 30px rgba(0, 217, 255, 0.2);
}

.profile-photo.large {
    width: 18rem;
    height: 18rem;
}

.profile-photo:hover {
    border-color: var(--color-secondary);
    transform: scale(1.05);
    box-shadow: 0 0 40px rgba(0, 217, 255, 0.3);
}

.profile-photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.about-text {
    font-size: 1.05rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

/* Skills Section */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.skill-card {
    padding: 1.5rem;
    background: rgba(20, 27, 58, 0.6);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    animation: fadeInUp 0.6s ease-out;
}

.skill-card:hover {
    border-color: var(--color-primary);
    background: rgba(20, 27, 58, 0.8);
    transform: translateY(-6px);
    box-shadow: var(--shadow-md);
}

.skill-card h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--color-primary);
    font-weight: 700;
}

.skill-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.skill-badges span {
    padding: 0.5rem 1rem;
    background: rgba(0, 217, 255, 0.1);
    color: var(--color-primary);
    font-size: 0.875rem;
    border-radius: 2rem;
    border: 1px solid rgba(0, 217, 255, 0.3);
    transition: all 0.3s ease;
    font-weight: 500;
}

.skill-badges span:hover {
    background: rgba(0, 217, 255, 0.2);
    border-color: var(--color-primary);
    transform: scale(1.05);
}

/* Projects Section */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 1.5rem;
}

.project-card {
    position: relative;
    padding: 1.5rem;
    background: rgba(20, 27, 58, 0.6);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    animation: fadeInUp 0.6s ease-out;
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
}

.project-card:hover {
    border-color: var(--color-primary);
    background: rgba(20, 27, 58, 0.8);
    transform: translateY(-6px);
    box-shadow: var(--shadow-md);
}

.project-card:hover::before {
    transform: scaleX(1);
}

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 0.75rem;
}

.project-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    transition: color 0.3s ease;
    flex: 1;
}

.project-link {
    flex-shrink: 0;
    padding: 0.5rem;
    background: rgba(0, 217, 255, 0.1);
    border: 1px solid rgba(0, 217, 255, 0.3);
    border-radius: var(--radius);
    color: var(--color-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    text-decoration: none;
}

.project-link:hover {
    background: rgba(0, 217, 255, 0.2);
    border-color: var(--color-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.project-card:hover h3 {
    color: var(--color-primary);
}

.project-card p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    line-height: 1.7;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.project-tags span {
    padding: 0.375rem 0.75rem;
    background: rgba(0, 217, 255, 0.1);
    color: var(--color-primary);
    font-size: 0.75rem;
    border-radius: 2rem;
    border: 1px solid rgba(0, 217, 255, 0.3);
    font-weight: 500;
    transition: all 0.3s ease;
}

.project-tags span:hover {
    background: rgba(0, 217, 255, 0.2);
    border-color: var(--color-primary);
}

/* Timeline */
.timeline {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.timeline-item {
    position: relative;
    padding: 1.5rem;
    padding-left: 2rem;
    background: rgba(20, 27, 58, 0.6);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    animation: fadeInUp 0.6s ease-out;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(180deg, var(--color-primary), var(--color-secondary));
    transform: scaleY(0);
    transform-origin: top;
    transition: transform 0.3s ease;
}

.timeline-item:hover {
    border-color: var(--color-primary);
    background: rgba(20, 27, 58, 0.8);
    transform: translateX(4px);
    box-shadow: var(--shadow-md);
}

.timeline-item:hover::before {
    transform: scaleY(1);
}

.timeline-header {
    margin-bottom: 0.5rem;
}

.timeline-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 0.25rem;
}

.timeline-date {
    font-size: 0.875rem;
    color: var(--text-muted);
    font-weight: 500;
}

.timeline-subtitle {
    color: var(--text-secondary);
    font-weight: 500;
    margin-bottom: 0.75rem;
}

.timeline-body {
    color: var(--text-secondary);
    line-height: 1.7;
}

.timeline-body ul {
    margin-left: 1.25rem;
    list-style: disc;
}

.timeline-body li {
    margin-bottom: 0.5rem;
}

/* Certifications */
.certifications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.cert-card {
    padding: 1.5rem;
    text-align: center;
    animation: fadeInUp 0.6s ease-out;
}

.cert-card h4 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 0.5rem;
}

.cert-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Contact Section */
.contact-section {
    background: rgba(15, 21, 53, 0.5);
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

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

.contact-box {
    padding: 2rem;
    background: rgba(20, 27, 58, 0.6);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(10px);
    animation: fadeInUp 0.6s ease-out;
}

.contact-heading {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 1.5rem;
}

.contact-item {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.contact-item:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.contact-item:hover {
    transform: translateX(4px);
}

.contact-icon-wrapper {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 217, 255, 0.1);
    border-radius: var(--radius);
    color: var(--color-primary);
    flex-shrink: 0;
    transition: all 0.3s ease;
}

.contact-item:hover .contact-icon-wrapper {
    background: rgba(0, 217, 255, 0.2);
    transform: scale(1.1);
}

.contact-label {
    font-size: 0.875rem;
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.25rem;
}

.contact-value {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.contact-value:hover {
    color: var(--color-primary);
}

.connect-item {
    padding: 1rem;
    text-align: center;
    transition: all 0.3s ease;
}

.connect-item a {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
}

.connect-item:hover a {
    color: var(--color-primary);
    transform: translateY(-2px);
}

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

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

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

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

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

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(8px);
    }
}

@keyframes glow {
    0%, 100% {
        box-shadow: 0 0 10px rgba(0, 217, 255, 0.3);
    }
    50% {
        box-shadow: 0 0 20px rgba(0, 217, 255, 0.5);
    }
}

/* Responsive */
@media (max-width: 768px) {
    .nav-right {
        gap: 1rem;
    }

    .hero-buttons {
        justify-content: center;
    }

    .social-links {
        justify-content: center;
    }

    .section {
        padding: 3rem 1.5rem;
    }

    .section-header {
        margin-bottom: 2rem;
    }
}

/* Utility Classes */
.text-gradient {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

strong {
    color: var(--color-primary);
    font-weight: 600;
}

/* Languages Section */
.languages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.language-card {
    text-align: center;
    padding: 2rem 1.5rem;
    animation: fadeInUp 0.6s ease-out;
}

.language-card h3 {
    font-size: 1.5rem;
    color: var(--color-primary);
    margin-bottom: 0.75rem;
    font-weight: 700;
}

.language-level {
    font-size: 1.1rem;
    color: var(--text-secondary);
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.language-description {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.6;
}