/* =============================================
   DESIGN SYSTEM — Dark Glassmorphism Portfolio
   ============================================= */

:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-card: rgba(255, 255, 255, 0.03);
    --bg-card-hover: rgba(255, 255, 255, 0.06);
    --border-color: rgba(255, 255, 255, 0.08);
    --border-glow: rgba(139, 92, 246, 0.3);

    --text-primary: #f0f0f5;
    --text-secondary: #a0a0b8;
    --text-muted: #6b6b80;

    --accent-1: #8b5cf6;   /* violet */
    --accent-2: #06b6d4;   /* cyan */
    --accent-3: #f59e0b;   /* amber */
    --gradient-primary: linear-gradient(135deg, var(--accent-1), var(--accent-2));
    --gradient-text: linear-gradient(135deg, #c084fc, #38bdf8);
    --gradient-hero: linear-gradient(160deg, rgba(139,92,246,0.15) 0%, transparent 50%, rgba(6,182,212,0.1) 100%);

    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;

    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-full: 9999px;

    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

/* =================== RESET =================== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { max-width: 100%; display: block; }
strong { color: var(--text-primary); font-weight: 600; }

/* =================== LAYOUT =================== */
.container { max-width: 1100px; margin: 0 auto; padding: 0 24px; }
.section { padding: 120px 0; position: relative; }

.section-title {
    font-size: clamp(1.8rem, 4vw, 2.4rem);
    font-weight: 700;
    margin-bottom: 60px;
    display: flex;
    align-items: center;
    gap: 16px;
}
.section-number {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--accent-1);
}
.section-title::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border-color);
    margin-left: 16px;
}

/* =================== NAVBAR =================== */
#navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    transition: var(--transition);
    backdrop-filter: blur(0px);
}
#navbar.scrolled {
    background: rgba(10, 10, 15, 0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    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;
    letter-spacing: -0.02em;
}
.nav-logo .accent { color: var(--accent-1); }
.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}
.nav-links a {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: var(--transition);
    position: relative;
}
.nav-links a:hover { color: var(--text-primary); }
.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: var(--transition);
}
.nav-links a:hover::after { width: 100%; }
.nav-cta {
    background: var(--gradient-primary) !important;
    color: white !important;
    padding: 8px 20px;
    border-radius: var(--radius-full);
    font-weight: 600 !important;
}
.nav-cta::after { display: none !important; }
.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    flex-direction: column;
    gap: 5px;
    padding: 4px;
}
.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition);
}

/* =================== HERO =================== */
#hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}
.hero-bg {
    position: absolute;
    inset: 0;
    pointer-events: none;
}
.hero-gradient {
    position: absolute;
    inset: 0;
    background: var(--gradient-hero);
}
.hero-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse 60% 60% at 50% 50%, black 20%, transparent 70%);
}
.hero-content {
    position: relative;
    z-index: 1;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
    padding-top: 100px;
}
.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--accent-2);
    border: 1px solid rgba(6, 182, 212, 0.3);
    padding: 6px 16px;
    border-radius: var(--radius-full);
    margin-bottom: 32px;
    animation: glow-pulse 3s ease-in-out infinite;
}
@keyframes glow-pulse {
    0%, 100% { box-shadow: 0 0 8px rgba(6, 182, 212, 0.1); }
    50% { box-shadow: 0 0 20px rgba(6, 182, 212, 0.25); }
}
.hero-greeting {
    display: block;
    font-size: clamp(1rem, 2.5vw, 1.3rem);
    font-weight: 400;
    color: var(--text-secondary);
    margin-bottom: 8px;
}
.hero-name {
    display: block;
    font-size: clamp(2.8rem, 7vw, 5rem);
    font-weight: 900;
    letter-spacing: -0.03em;
    line-height: 1.1;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero-role-wrapper {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 16px;
    font-size: clamp(1.1rem, 2.5vw, 1.5rem);
}
.hero-role-prefix {
    color: var(--text-secondary);
    font-weight: 400;
}
.hero-role {
    color: var(--accent-1);
    font-weight: 600;
    min-width: 280px;
}
.hero-cursor {
    animation: blink 1s step-end infinite;
    color: var(--accent-1);
    font-weight: 300;
}
@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}
.hero-desc {
    max-width: 540px;
    margin-top: 24px;
    font-size: 1.05rem;
    color: var(--text-secondary);
    line-height: 1.8;
}
.hero-actions {
    display: flex;
    gap: 16px;
    margin-top: 40px;
    flex-wrap: wrap;
}

/* =================== BUTTONS =================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    transition: var(--transition);
    cursor: pointer;
    border: none;
}
.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 24px rgba(139, 92, 246, 0.25);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(139, 92, 246, 0.35);
}
.btn-ghost {
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}
.btn-ghost:hover {
    border-color: var(--accent-1);
    background: rgba(139, 92, 246, 0.08);
}

/* =================== HERO STATS =================== */
.hero-stats {
    display: flex;
    gap: 48px;
    margin-top: 64px;
    padding-top: 32px;
    border-top: 1px solid var(--border-color);
}
.stat-number {
    display: block;
    font-size: 2.4rem;
    font-weight: 800;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.stat-number::after { content: '+'; }
.stat-label {
    display: block;
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 4px;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

/* =================== SCROLL INDICATOR =================== */
.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
}
.scroll-line {
    width: 1px;
    height: 60px;
    background: linear-gradient(to bottom, var(--accent-1), transparent);
    animation: scroll-pulse 2s ease-in-out infinite;
}
@keyframes scroll-pulse {
    0%, 100% { opacity: 0.3; transform: scaleY(0.6); }
    50% { opacity: 1; transform: scaleY(1); }
}

/* =================== GLASS CARD =================== */
.glass-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 32px;
    transition: var(--transition);
}
.glass-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-glow);
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(139, 92, 246, 0.08);
}

/* =================== ABOUT =================== */
.about-grid {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 64px;
    align-items: start;
}
.about-image-wrapper { position: relative; }
.about-image-frame {
    border-radius: var(--radius-md);
    overflow: hidden;
    position: relative;
    z-index: 1;
}
.about-image {
    width: 100%;
    aspect-ratio: 3/4;
    object-fit: cover;
    filter: grayscale(20%) contrast(1.05);
    transition: var(--transition);
}
.about-image-wrapper:hover .about-image { filter: none; }
.about-image-decoration {
    position: absolute;
    top: 16px;
    left: 16px;
    right: -16px;
    bottom: -16px;
    border: 2px solid var(--accent-1);
    border-radius: var(--radius-md);
    opacity: 0.4;
    transition: var(--transition);
}
.about-image-wrapper:hover .about-image-decoration {
    top: 12px; left: 12px; opacity: 0.7;
}
.about-text p {
    color: var(--text-secondary);
    margin-bottom: 20px;
    font-size: 1rem;
}
.about-text .flag { font-size: 1.2em; }
.about-languages {
    display: flex;
    gap: 16px;
    margin-top: 32px;
}
.lang-card {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    flex: 1;
}
.lang-flag { font-size: 1.5rem; }
.lang-name { font-weight: 600; font-size: 0.9rem; }
.lang-level { font-size: 0.8rem; color: var(--accent-2); margin-left: auto; font-weight: 500; }

/* =================== SKILLS =================== */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}
.skill-category {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 32px;
    transition: var(--transition);
}
.skill-category:hover {
    border-color: var(--border-glow);
    background: var(--bg-card-hover);
}
.skill-icon { font-size: 2rem; margin-bottom: 16px; }
.skill-category h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 16px;
}
.skill-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.skill-tag {
    font-size: 0.8rem;
    font-weight: 500;
    padding: 6px 14px;
    background: rgba(139, 92, 246, 0.1);
    border: 1px solid rgba(139, 92, 246, 0.2);
    border-radius: var(--radius-full);
    color: var(--accent-1);
    transition: var(--transition);
}
.skill-tag:hover {
    background: rgba(139, 92, 246, 0.2);
    border-color: var(--accent-1);
}

/* =================== TIMELINE =================== */
.timeline { position: relative; padding-left: 40px; }
.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--accent-1), var(--accent-2), transparent);
}
.timeline-item {
    position: relative;
    margin-bottom: 40px;
}
.timeline-item:last-child { margin-bottom: 0; }
.timeline-marker {
    position: absolute;
    left: -47px;
    top: 36px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--accent-1);
    border: 3px solid var(--bg-primary);
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.3);
}
.timeline-header {
    display: flex;
    align-items: baseline;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 8px;
}
.timeline-header h3 { font-size: 1.15rem; font-weight: 700; }
.timeline-company {
    font-size: 0.9rem;
    color: var(--accent-2);
    font-weight: 500;
}
.timeline-date {
    display: inline-block;
    font-size: 0.8rem;
    font-family: var(--font-mono);
    color: var(--text-muted);
    margin-bottom: 16px;
}
.timeline-content ul { padding-left: 0; }
.timeline-content li {
    position: relative;
    padding-left: 20px;
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 8px;
}
.timeline-content li::before {
    content: '▹';
    position: absolute;
    left: 0;
    color: var(--accent-1);
    font-weight: 700;
}

/* =================== PROJECTS =================== */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 24px;
}
.project-card {
    display: flex;
    flex-direction: column;
    cursor: default;
}
.project-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}
.project-icon { font-size: 2rem; }
.project-links { display: flex; gap: 12px; }
.project-links a {
    color: var(--text-muted);
    transition: var(--transition);
    padding: 4px;
}
.project-links a:hover { color: var(--accent-1); transform: translateY(-2px); }
.project-title {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 8px;
}
.project-badge {
    display: inline-block;
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    color: var(--accent-3);
    background: rgba(245, 158, 11, 0.1);
    border: 1px solid rgba(245, 158, 11, 0.2);
    padding: 4px 12px;
    border-radius: var(--radius-full);
    margin-bottom: 12px;
}
.project-desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
    flex: 1;
    margin-bottom: 20px;
}
.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: auto;
}
.project-tags span {
    font-size: 0.75rem;
    font-family: var(--font-mono);
    color: var(--text-muted);
    padding: 4px 10px;
    background: rgba(255,255,255,0.04);
    border-radius: var(--radius-sm);
}

/* =================== EDUCATION =================== */
.education-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 40px;
}
.education-card { text-align: center; }
.edu-icon { font-size: 2.4rem; margin-bottom: 16px; }
.education-card h3 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 8px;
}
.edu-school {
    display: block;
    font-size: 0.85rem;
    color: var(--accent-2);
    margin-bottom: 4px;
}
.edu-date {
    display: block;
    font-size: 0.8rem;
    font-family: var(--font-mono);
    color: var(--text-muted);
    margin-bottom: 12px;
}
.education-card p {
    font-size: 0.88rem;
    color: var(--text-secondary);
}

.certs-row {
    display: flex;
    gap: 24px;
    justify-content: center;
}
.cert-badge {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 28px 40px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: var(--transition);
    min-width: 220px;
}
.cert-badge:hover {
    border-color: var(--border-glow);
    transform: translateY(-4px);
}
.cert-score {
    font-size: 2.2rem;
    font-weight: 900;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: 8px;
}
.cert-name {
    font-size: 0.9rem;
    font-weight: 600;
}
.cert-detail {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 4px;
}

/* =================== CONTACT =================== */
#contact { padding-bottom: 80px; }
.contact-lead {
    text-align: center;
    font-size: 1.15rem;
    color: var(--text-secondary);
    max-width: 500px;
    margin: 0 auto 48px;
}
.contact-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    max-width: 600px;
    margin: 0 auto;
}
.contact-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 28px 20px;
    text-align: center;
}
.contact-icon { font-size: 1.8rem; }
.contact-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
}
.contact-value {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--accent-2);
}

/* =================== FOOTER =================== */
footer {
    padding: 32px 0;
    text-align: center;
    border-top: 1px solid var(--border-color);
}
footer p {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* =================== ANIMATIONS =================== */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* =================== RESPONSIVE =================== */
@media (max-width: 900px) {
    .about-grid { grid-template-columns: 1fr; gap: 40px; }
    .about-image-wrapper { max-width: 260px; margin: 0 auto; }
    .skills-grid { grid-template-columns: 1fr; }
    .education-grid { grid-template-columns: 1fr; }
    .hero-stats { gap: 32px; }
}

@media (max-width: 768px) {
    .section { padding: 80px 0; }
    .nav-links {
        display: none;
        position: fixed;
        top: 0;
        right: 0;
        bottom: 0;
        width: 70%;
        max-width: 300px;
        background: rgba(10, 10, 15, 0.97);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 100px 40px 40px;
        gap: 24px;
        border-left: 1px solid var(--border-color);
    }
    .nav-links.open { display: flex; }
    .nav-toggle { display: flex; }
    .hero-stats { flex-direction: column; gap: 20px; }
    .hero-role { min-width: auto; }
    .certs-row { flex-direction: column; align-items: center; }
    .contact-grid { grid-template-columns: 1fr; }
    .projects-grid { grid-template-columns: 1fr; }
    .about-languages { flex-direction: column; }
    .timeline { padding-left: 30px; }
    .timeline-marker { left: -37px; }
}

/* =================== PREFERS REDUCED MOTION =================== */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}