/* ============================================
   DESIGN TOKENS & VARIABLES
   ============================================ */
:root {
    --bg-primary: #0a0e17;
    --bg-secondary: #111827;
    --bg-card: rgba(17, 24, 39, 0.7);
    --bg-card-hover: rgba(30, 41, 59, 0.8);
    --text-primary: #e2e8f0;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --accent: #58a6ff;
    --accent-glow: rgba(88, 166, 255, 0.15);
    --accent-secondary: #a78bfa;
    --accent-gradient: linear-gradient(135deg, #58a6ff 0%, #a78bfa 50%, #f472b6 100%);
    --border: rgba(148, 163, 184, 0.1);
    --border-hover: rgba(88, 166, 255, 0.3);
    --glass: rgba(15, 23, 42, 0.6);
    --glass-border: rgba(148, 163, 184, 0.08);
    --shadow-lg: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    --radius: 16px;
    --radius-sm: 8px;
    --radius-xs: 4px;
    --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ============================================
   RESET & BASE
   ============================================ */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--accent-secondary);
}

img {
    max-width: 100%;
    display: block;
}

/* ============================================
   LAYOUT
   ============================================ */
.container {
    width: 100%;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
}

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

.section-title {
    font-size: 2.2rem;
    font-weight: 800;
    text-align: center;
    margin-bottom: 60px;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.02em;
}

/* ============================================
   NAVBAR
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: transparent;
    transition: var(--transition);
    padding: 16px 0;
}

.navbar.scrolled {
    background: rgba(10, 14, 23, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    padding: 10px 0;
}

.nav-container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-primary) !important;
    letter-spacing: -0.03em;
}

.logo-dot {
    color: var(--accent);
}

.nav-menu {
    list-style: none;
    display: flex;
    gap: 8px;
}

.nav-link {
    color: var(--text-secondary) !important;
    font-size: 0.9rem;
    font-weight: 500;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.nav-link:hover {
    color: var(--text-primary) !important;
    background: var(--accent-glow);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition);
}

/* ============================================
   HERO
   ============================================ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    padding: 120px 24px 80px;
}

.hero-bg {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.hero-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.4;
    animation: orbFloat 15s ease-in-out infinite;
}

.hero-orb-1 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, #58a6ff 0%, transparent 70%);
    top: -10%;
    right: -5%;
    animation-delay: 0s;
}

.hero-orb-2 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, #a78bfa 0%, transparent 70%);
    bottom: -5%;
    left: -5%;
    animation-delay: -5s;
}

.hero-orb-3 {
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, #f472b6 0%, transparent 70%);
    top: 40%;
    left: 30%;
    animation-delay: -10s;
}

@keyframes orbFloat {
    0%, 100% { transform: translate(0, 0) scale(1); }
    25% { transform: translate(30px, -40px) scale(1.05); }
    50% { transform: translate(-20px, 20px) scale(0.95); }
    75% { transform: translate(15px, 30px) scale(1.02); }
}

.hero-content {
    text-align: center;
    position: relative;
    z-index: 1;
    max-width: 800px;
}

.hero-greeting {
    font-size: 1.1rem;
    color: var(--accent);
    font-weight: 500;
    margin-bottom: 12px;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.hero-name {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 900;
    letter-spacing: -0.03em;
    line-height: 1.1;
    margin-bottom: 16px;
    background: linear-gradient(135deg, #ffffff 0%, #94a3b8 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-title-wrapper {
    font-size: clamp(1.2rem, 3vw, 1.8rem);
    height: 2.5em;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
}

.hero-title {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
}

.hero-cursor {
    color: var(--accent);
    font-weight: 300;
    animation: blink 1s infinite;
    margin-left: 2px;
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

.hero-tagline {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 36px;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

.hero-cta {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-bottom: 60px;
    flex-wrap: wrap;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: 50px;
    font-family: var(--font);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    text-decoration: none;
}

.btn-primary {
    background: var(--accent-gradient);
    color: #fff;
    box-shadow: 0 4px 20px rgba(88, 166, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(88, 166, 255, 0.4);
    color: #fff;
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 1.5px solid var(--border-hover);
}

.btn-outline:hover {
    background: var(--accent-glow);
    border-color: var(--accent);
    transform: translateY(-2px);
    color: var(--text-primary);
}

/* Hero Stats */
.hero-stats {
    display: flex;
    justify-content: center;
    gap: 48px;
    flex-wrap: wrap;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline;
}

.stat-suffix {
    font-size: 2.5rem;
    font-weight: 800;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 500;
    margin-top: 4px;
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    animation: scrollBounce 2s ease-in-out infinite;
}

.scroll-mouse {
    width: 26px;
    height: 42px;
    border: 2px solid var(--text-muted);
    border-radius: 13px;
    display: flex;
    justify-content: center;
    padding-top: 8px;
}

.scroll-wheel {
    width: 3px;
    height: 8px;
    background: var(--accent);
    border-radius: 2px;
    animation: scrollWheel 2s ease-in-out infinite;
}

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

@keyframes scrollWheel {
    0%, 100% { opacity: 1; transform: translateY(0); }
    50% { opacity: 0.3; transform: translateY(6px); }
}

/* ============================================
   ABOUT
   ============================================ */
.about-grid {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 60px;
    align-items: start;
}

.image-frame {
    position: relative;
    border-radius: var(--radius);
    overflow: hidden;
    aspect-ratio: 3/4;
    background: var(--bg-card);
    border: 1px solid var(--border);
}

.image-frame::before {
    content: '';
    position: absolute;
    inset: -1px;
    border-radius: var(--radius);
    padding: 2px;
    background: var(--accent-gradient);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0.5;
    pointer-events: none;
}

.image-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    color: var(--text-muted);
}

.image-placeholder svg {
    width: 48px;
    height: 48px;
    opacity: 0.5;
}

.image-placeholder span {
    font-size: 0.85rem;
    font-weight: 500;
}

.about-lead {
    font-size: 1.15rem;
    line-height: 1.8;
    margin-bottom: 16px;
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.about-text strong {
    color: var(--text-primary);
}

.about-highlights {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-top: 28px;
}

.highlight-card {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.highlight-card:hover {
    border-color: var(--border-hover);
    background: var(--bg-card-hover);
}

.highlight-icon {
    font-size: 1.5rem;
    line-height: 1;
}

.highlight-card strong {
    display: block;
    color: var(--text-primary);
    font-size: 0.9rem;
}

.highlight-card span {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ============================================
   EXPERIENCE TIMELINE
   ============================================ */
.timeline {
    position: relative;
    padding-left: 40px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 14px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--accent), var(--accent-secondary), transparent);
}

.timeline-item {
    position: relative;
    margin-bottom: 40px;
}

.timeline-item:last-child {
    margin-bottom: 0;
}

.timeline-marker {
    position: absolute;
    left: -40px;
    top: 8px;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: var(--bg-primary);
    border: 3px solid var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1;
    transition: var(--transition);
}

.timeline-marker::after {
    content: '';
    width: 10px;
    height: 10px;
    background: var(--accent);
    border-radius: 50%;
    transition: var(--transition);
}

.timeline-item:hover .timeline-marker {
    border-color: var(--accent-secondary);
    box-shadow: 0 0 20px var(--accent-glow);
}

.timeline-item:hover .timeline-marker::after {
    background: var(--accent-secondary);
}

.timeline-content {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
    transition: var(--transition);
    backdrop-filter: blur(10px);
}

.timeline-content:hover {
    border-color: var(--border-hover);
    background: var(--bg-card-hover);
    transform: translateX(4px);
}

.timeline-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 12px;
    gap: 16px;
}

.timeline-header h3 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.01em;
}

.timeline-company {
    font-size: 0.95rem;
    color: var(--accent);
    font-weight: 500;
    margin-top: 2px;
}

.timeline-date {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-muted);
    background: var(--accent-glow);
    padding: 4px 12px;
    border-radius: 50px;
    white-space: nowrap;
    flex-shrink: 0;
}

.timeline-description {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 12px;
    font-style: italic;
}

.timeline-achievements {
    list-style: none;
    margin-bottom: 16px;
}

.timeline-achievements li {
    position: relative;
    padding-left: 20px;
    margin-bottom: 8px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.timeline-achievements li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--accent);
    font-weight: bold;
}

.timeline-achievements strong {
    color: var(--text-primary);
}

.timeline-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.tag {
    font-size: 0.75rem;
    font-weight: 500;
    padding: 4px 10px;
    border-radius: 50px;
    background: var(--accent-glow);
    color: var(--accent);
    border: 1px solid rgba(88, 166, 255, 0.15);
}

/* ============================================
   SKILLS
   ============================================ */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.skill-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
    text-align: center;
    transition: var(--transition);
    backdrop-filter: blur(10px);
}

.skill-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    background: var(--bg-card-hover);
}

.skill-icon {
    font-size: 2rem;
    margin-bottom: 16px;
    line-height: 1;
}

.skill-card h3 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    justify-content: center;
}

.skill-tags span {
    font-size: 0.78rem;
    font-weight: 500;
    padding: 4px 12px;
    border-radius: 50px;
    background: rgba(88, 166, 255, 0.08);
    color: var(--text-secondary);
    border: 1px solid var(--border);
    transition: var(--transition);
}

.skill-card:hover .skill-tags span {
    border-color: var(--border-hover);
    color: var(--accent);
}

/* ============================================
   EDUCATION
   ============================================ */
.education-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    max-width: 900px;
    margin: 0 auto;
}

.education-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px;
    display: flex;
    gap: 20px;
    transition: var(--transition);
    backdrop-filter: blur(10px);
}

.education-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.edu-flag {
    font-size: 2.5rem;
    line-height: 1;
    flex-shrink: 0;
}

.edu-content h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.edu-university {
    color: var(--accent);
    font-weight: 500;
    font-size: 0.9rem;
    margin-bottom: 4px;
}

.edu-date {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-bottom: 10px;
}

.edu-gpa {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.edu-gpa strong {
    color: var(--accent);
}

.edu-thesis {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 8px;
    line-height: 1.5;
}

/* ============================================
   CONTACT
   ============================================ */
.contact {
    background: var(--bg-secondary);
}

.contact-subtitle {
    text-align: center;
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-top: -40px;
    margin-bottom: 50px;
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    max-width: 800px;
    margin: 0 auto;
}

.contact-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px 24px;
    text-align: center;
    transition: var(--transition);
    display: block;
    color: var(--text-primary) !important;
}

.contact-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    background: var(--bg-card-hover);
}

.contact-icon {
    font-size: 2rem;
    margin-bottom: 16px;
    line-height: 1;
    display: flex;
    justify-content: center;
    align-items: center;
}

.contact-icon svg {
    fill: var(--accent);
}

.contact-card h3 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.contact-card p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    word-break: break-word;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    text-align: center;
    padding: 32px 24px;
    color: var(--text-muted);
    font-size: 0.85rem;
    border-top: 1px solid var(--border);
}

/* ============================================
   REVEAL ANIMATION
   ============================================ */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1),
                transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: rgba(10, 14, 23, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 80px 32px 32px;
        transition: var(--transition);
        border-left: 1px solid var(--border);
    }

    .nav-menu.active {
        right: 0;
    }

    .nav-toggle {
        display: flex;
        z-index: 1001;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    .about-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .image-frame {
        max-width: 240px;
        margin: 0 auto;
    }

    .about-highlights {
        grid-template-columns: 1fr;
    }

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

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

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

    .hero-stats {
        gap: 32px;
    }

    .timeline {
        padding-left: 30px;
    }

    .timeline::before {
        left: 9px;
    }

    .timeline-marker {
        left: -30px;
        width: 22px;
        height: 22px;
    }

    .timeline-marker::after {
        width: 8px;
        height: 8px;
    }

    .timeline-header {
        flex-direction: column;
        gap: 8px;
    }

    .timeline-content {
        padding: 20px;
    }

    .section {
        padding: 70px 0;
    }

    .section-title {
        font-size: 1.8rem;
        margin-bottom: 40px;
    }
}

@media (max-width: 480px) {
    .hero-stats {
        flex-direction: column;
        gap: 24px;
    }

    .stat-number, .stat-suffix {
        font-size: 2rem;
    }

    .hero-cta {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 280px;
        justify-content: center;
    }
}