/* ===========================
   Data Analyst Portfolio
   Dark Theme + Dashboard Style
   =========================== */

:root {
    --bg-primary: #0a0f1c;
    --bg-secondary: #111827;
    --bg-card: #1a2235;
    --bg-card-hover: #232d42;
    
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    
    --accent-cyan: #22d3ee;
    --accent-cyan-dim: rgba(34, 211, 238, 0.1);
    --accent-emerald: #10b981;
    --accent-emerald-dim: rgba(16, 185, 129, 0.1);
    
    --border-color: rgba(148, 163, 184, 0.1);
    --glow-cyan: 0 0 40px rgba(34, 211, 238, 0.15);
    
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Data Grid Background */
.data-grid {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        linear-gradient(rgba(34, 211, 238, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(34, 211, 238, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    pointer-events: none;
    z-index: -1;
}

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem 3rem;
    z-index: 100;
    transition: all 0.3s ease;
}

.nav.scrolled {
    background: rgba(10, 15, 28, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
}

.nav-logo {
    font-family: var(--font-mono);
    font-size: 1.25rem;
    font-weight: 600;
}

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

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

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    transition: color 0.2s ease;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-cyan);
    transition: width 0.2s ease;
}

.nav-link:hover {
    color: var(--text-primary);
}

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

/* Hero Section */
.hero {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    padding: 6rem 4rem;
    max-width: 1400px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--accent-emerald-dim);
    color: var(--accent-emerald);
    padding: 0.5rem 1rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 1.5rem;
}

.badge-dot {
    width: 6px;
    height: 6px;
    background: var(--accent-emerald);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 0.75rem;
}

.title-line {
    display: block;
}

.gradient-text {
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-emerald));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--text-secondary);
    font-weight: 400;
    margin-bottom: 1rem;
}

.hero-description {
    color: var(--text-muted);
    font-size: 1rem;
    max-width: 500px;
    margin-bottom: 2rem;
}

/* Hero Stats */
.hero-stats {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1rem 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-cyan);
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Social Links */
.hero-social {
    display: flex;
    gap: 0.75rem;
}

.social-link {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-secondary);
    transition: all 0.2s ease;
}

.social-link:hover {
    background: var(--accent-cyan-dim);
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
    transform: translateY(-2px);
}

/* Hero Visual - Chart */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.chart-container {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    overflow: hidden;
    width: 100%;
    max-width: 450px;
    box-shadow: var(--glow-cyan);
}

.chart-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.25rem;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
}

.chart-title {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.chart-dots {
    display: flex;
    gap: 6px;
}

.dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.dot.red { background: #ef4444; }
.dot.yellow { background: #eab308; }
.dot.green { background: #22c55e; }

.chart-bars {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.bar-item {
    display: grid;
    grid-template-columns: 80px 1fr 45px;
    align-items: center;
    gap: 1rem;
}

.bar-label {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.bar-track {
    height: 8px;
    background: var(--bg-secondary);
    border-radius: 4px;
    overflow: hidden;
}

.bar-fill {
    height: 100%;
    width: 0;
    background: linear-gradient(90deg, var(--accent-cyan), var(--accent-emerald));
    border-radius: 4px;
    transition: width 1s ease-out;
}

.bar-fill.animate {
    width: var(--width);
}

.bar-value {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--accent-cyan);
    text-align: right;
}

/* Section Styles */
section {
    padding: 5rem 4rem;
    max-width: 1400px;
    margin: 0 auto;
}

.section-header {
    margin-bottom: 3rem;
}

.section-tag {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--accent-cyan);
    display: block;
    margin-bottom: 0.75rem;
}

.section-title {
    font-size: 2rem;
    font-weight: 700;
}

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

.skill-category {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.5rem;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.4s ease;
}

.skill-category.animate {
    opacity: 1;
    transform: translateY(0);
}

.skill-category:hover {
    border-color: rgba(34, 211, 238, 0.3);
    background: var(--bg-card-hover);
}

.category-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.category-icon {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-cyan-dim);
    border-radius: 8px;
    color: var(--accent-cyan);
}

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

.skill-tag {
    background: var(--bg-secondary);
    color: var(--text-secondary);
    padding: 0.4rem 0.75rem;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 500;
    transition: all 0.2s ease;
}

.skill-tag:hover {
    background: var(--accent-cyan-dim);
    color: var(--accent-cyan);
}

.skill-tag.highlight {
    background: var(--accent-emerald-dim);
    color: var(--accent-emerald);
}

/* Experience Timeline */
.timeline {
    position: relative;
    padding-left: 2rem;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 7px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--border-color);
}

.timeline-item {
    position: relative;
    padding-bottom: 2.5rem;
    padding-left: 2rem;
    opacity: 0;
    transform: translateX(-20px);
    transition: all 0.4s ease;
}

.timeline-item.animate {
    opacity: 1;
    transform: translateX(0);
}

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

.timeline-marker {
    position: absolute;
    left: -2rem;
    top: 4px;
    width: 16px;
    height: 16px;
    background: var(--bg-card);
    border: 2px solid var(--text-muted);
    border-radius: 50%;
    z-index: 1;
}

.timeline-marker.current {
    border-color: var(--accent-cyan);
    background: var(--accent-cyan);
    box-shadow: 0 0 0 4px var(--accent-cyan-dim);
}

.timeline-content {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
}

.timeline-date {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--accent-cyan);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.timeline-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin: 0.5rem 0 0.25rem;
}

.timeline-company {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 0.75rem;
}

.timeline-desc {
    color: var(--text-muted);
    font-size: 0.875rem;
    line-height: 1.6;
}

/* Projects Section */
.project-card {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 2rem;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.4s ease;
}

.project-card.animate {
    opacity: 1;
    transform: translateY(0);
}

.project-preview {
    display: flex;
    align-items: center;
    justify-content: center;
}

.project-mockup {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    width: 100%;
}

.mockup-header {
    background: var(--bg-primary);
    padding: 0.75rem 1rem;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-color);
}

.mockup-content {
    padding: 1.5rem;
}

.mockup-chart {
    display: flex;
    align-items: flex-end;
    gap: 0.75rem;
    height: 120px;
    margin-bottom: 1rem;
}

.mock-bar {
    flex: 1;
    height: var(--h);
    background: linear-gradient(180deg, var(--accent-cyan), var(--accent-emerald));
    border-radius: 4px 4px 0 0;
    opacity: 0.8;
    transition: opacity 0.2s ease;
}

.mock-bar:hover {
    opacity: 1;
}

.mockup-metrics {
    display: flex;
    gap: 1.5rem;
}

.metric {
    display: flex;
    flex-direction: column;
    gap: 0.125rem;
}

.metric-value {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--accent-cyan);
}

.metric-label {
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
}

.project-info {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.project-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.project-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

.project-tech {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.project-tech span {
    background: var(--accent-cyan-dim);
    color: var(--accent-cyan);
    padding: 0.4rem 0.75rem;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 500;
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s ease;
}

.project-link:hover {
    color: var(--accent-cyan);
}

/* Contact Section */
.contact {
    text-align: center;
    padding: 6rem 4rem;
}

.contact-content {
    max-width: 600px;
    margin: 0 auto;
}

.contact-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin: 1rem 0;
}

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

.contact-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
}

.contact-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 1.5rem;
    border-radius: 10px;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.2s ease;
}

.contact-btn.primary {
    background: var(--accent-cyan);
    color: var(--bg-primary);
}

.contact-btn.primary:hover {
    background: #06b6d4;
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(34, 211, 238, 0.3);
}

.contact-btn.secondary {
    background: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.contact-btn.secondary:hover {
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
    transform: translateY(-2px);
}

.contact-btn.download {
    background: linear-gradient(135deg, var(--accent-emerald), #059669);
    color: white;
    border: none;
    font-weight: 600;
    animation: pulse-glow 2s ease-in-out infinite;
}

.contact-btn.download:hover {
    background: linear-gradient(135deg, #059669, #047857);
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(16, 185, 129, 0.4);
}

@keyframes pulse-glow {
    0%, 100% {
        box-shadow: 0 0 5px rgba(16, 185, 129, 0.3);
    }
    50% {
        box-shadow: 0 0 20px rgba(16, 185, 129, 0.5);
    }
}

/* Language Switcher */
.lang-switcher {
    position: fixed;
    top: 1.25rem;
    right: 8rem;
    display: flex;
    gap: 0.25rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 0.25rem;
    z-index: 101;
}

.lang-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    padding: 0.4rem 0.75rem;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.lang-btn:hover {
    color: var(--text-secondary);
}

.lang-btn.active {
    background: var(--accent-cyan);
    color: var(--bg-primary);
}

/* Contact Phone */
.contact-phone {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    font-size: 1.125rem;
}

.contact-phone svg {
    color: var(--accent-cyan);
}

.contact-phone a {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s ease;
}

.contact-phone a:hover {
    color: var(--accent-cyan);
}

/* Projects Grid */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 1.5rem;
}

.project-card-new {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.5rem;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.4s ease;
}

.project-card-new.animate {
    opacity: 1;
    transform: translateY(0);
}

.project-card-new:hover {
    border-color: rgba(34, 211, 238, 0.3);
    background: var(--bg-card-hover);
    transform: translateY(-4px);
}

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

.project-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-cyan-dim);
    border-radius: 12px;
    color: var(--accent-cyan);
}

.project-type {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--accent-emerald);
    background: var(--accent-emerald-dim);
    padding: 0.35rem 0.75rem;
    border-radius: 6px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.project-card-title {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.project-details {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-bottom: 1.25rem;
}

.detail-item {
    border-left: 2px solid var(--border-color);
    padding-left: 0.75rem;
}

.detail-item:hover {
    border-left-color: var(--accent-cyan);
}

.detail-label {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--accent-cyan);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    display: block;
    margin-bottom: 0.25rem;
}

.detail-item p {
    color: var(--text-secondary);
    font-size: 0.8rem;
    line-height: 1.5;
}

.project-card-new .project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin-bottom: 1rem;
}

.project-card-new .project-tech span {
    background: var(--bg-secondary);
    color: var(--text-secondary);
    padding: 0.3rem 0.6rem;
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: 500;
}

.project-card-new .project-link {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    color: var(--accent-cyan);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 500;
    transition: all 0.2s ease;
}

.project-card-new .project-link:hover {
    gap: 0.6rem;
}

/* Footer */
.footer {
    text-align: center;
    padding: 2rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 0.875rem;
}

.footer-year {
    color: var(--accent-cyan);
    margin-top: 0.25rem;
}

/* ==================
   Responsive Design
   ================== */

@media (max-width: 1024px) {
    .hero {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 3rem;
        padding: 8rem 2rem 4rem;
    }
    
    .hero-content {
        order: 1;
    }
    
    .hero-visual {
        order: 2;
    }
    
    .hero-description {
        margin-left: auto;
        margin-right: auto;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .hero-social {
        justify-content: center;
    }
    
    .project-card {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav {
        padding: 1rem 1.5rem;
    }
    
    .nav-links {
        display: none;
    }
    
    .lang-switcher {
        right: 1.5rem;
    }
    
    section {
        padding: 3rem 1.5rem;
    }
    
    .hero-title {
        font-size: 2.25rem;
    }
    
    .hero-stats {
        flex-direction: column;
        align-items: center;
    }
    
    .stat-card {
        width: 100%;
        max-width: 200px;
        text-align: center;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-links {
        flex-direction: column;
    }
    
    .contact-btn {
        width: 100%;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 6rem 1rem 3rem;
    }
    
    .chart-container {
        max-width: 100%;
    }
    
    .bar-item {
        grid-template-columns: 60px 1fr 40px;
        gap: 0.5rem;
    }
    
    .bar-label {
        font-size: 0.7rem;
    }
}