@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500;600&family=Outfit:wght@400;500;600;700;800&display=swap');

:root {
    --bg-obsidian: #08090D;
    --bg-surface: #11131C;
    --bg-surface-hover: #181C2B;
    --border-card: #1F2433;
    --border-card-hover: rgba(16, 185, 129, 0.4);
    --accent-emerald: #10B981;
    --accent-cyan: #06B6D4;
    --accent-emerald-glow: rgba(16, 185, 129, 0.15);
    --text-primary: #F4F4F5;
    --text-muted: #A1A1AA;
    
    --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-code: 'JetBrains Mono', monospace;

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 18px;
    --radius-full: 9999px;

    --transition-fast: 0.15s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-smooth: 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
    scroll-behavior: smooth;
    color-scheme: dark;
}

body {
    font-family: var(--font-body);
    background-color: var(--bg-obsidian);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    color: var(--text-primary);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

p {
    color: var(--text-muted);
}

a {
    color: inherit;
    text-decoration: none;
}

/* Selection */
::selection {
    background: rgba(16, 185, 129, 0.3);
    color: var(--text-primary);
}

/* Active Click Feedback */
button:active, 
.btn:active, 
.project-card:active, 
.experience-card:active, 
.skill-pill:active,
.nav-link:active {
    transform: scale(0.97) !important;
    transition: transform var(--transition-fast) !important;
}

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

section {
    padding: 6rem 0;
    position: relative;
}

/* Header & Navigation */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(8, 9, 13, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-card);
    transition: background var(--transition-smooth);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 800;
    letter-spacing: 0.05em;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo-dot {
    width: 8px;
    height: 8px;
    background-color: var(--accent-emerald);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--accent-emerald);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 2rem;
    list-style: none;
}

.nav-link {
    font-family: var(--font-body);
    font-size: 0.925rem;
    font-weight: 500;
    color: var(--text-muted);
    transition: color var(--transition-fast);
    position: relative;
    padding: 0.4rem 0;
}

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

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--accent-emerald);
    border-radius: var(--radius-full);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* Mobile Nav Toggle */
.mobile-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.65rem 1.35rem;
    font-family: var(--font-body);
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-smooth);
    border: 1px solid transparent;
}

.btn-primary {
    background-color: var(--accent-emerald);
    color: #041B12;
    border-color: var(--accent-emerald);
    box-shadow: 0 4px 14px rgba(16, 185, 129, 0.25);
}

.btn-primary:hover {
    background-color: #12d394;
    box-shadow: 0 6px 20px rgba(16, 185, 129, 0.4);
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: var(--bg-surface);
    color: var(--text-primary);
    border-color: var(--border-card);
}

.btn-secondary:hover {
    background-color: var(--bg-surface-hover);
    border-color: rgba(244, 244, 245, 0.2);
    transform: translateY(-2px);
}

.btn-icon {
    width: 40px;
    height: 40px;
    padding: 0;
    border-radius: var(--radius-md);
    background-color: var(--bg-surface);
    color: var(--text-primary);
    border: 1px solid var(--border-card);
}

.btn-icon:hover {
    border-color: var(--accent-emerald);
    color: var(--accent-emerald);
    transform: translateY(-2px);
}

/* Live Status Pill Badge */
.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.4rem 1rem;
    background-color: rgba(16, 185, 129, 0.08);
    border: 1px solid rgba(16, 185, 129, 0.25);
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--accent-emerald);
    margin-bottom: 1.5rem;
}

.pulse-dot {
    width: 8px;
    height: 8px;
    background-color: var(--accent-emerald);
    border-radius: 50%;
    position: relative;
}

.pulse-dot::after {
    content: '';
    position: absolute;
    top: -4px;
    left: -4px;
    right: -4px;
    bottom: -4px;
    border: 2px solid var(--accent-emerald);
    border-radius: 50%;
    animation: statusPulse 2s cubic-bezier(0.24, 0, 0.38, 1) infinite;
}

@keyframes statusPulse {
    0% { transform: scale(0.6); opacity: 1; }
    100% { transform: scale(2); opacity: 0; }
}

/* Hero Section */
.hero-section {
    padding-top: 10rem;
    padding-bottom: 6rem;
    min-height: 85vh;
    display: flex;
    align-items: center;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 4rem;
    align-items: center;
}

.hero-headline {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    letter-spacing: -0.03em;
}

.hero-subtitle {
    font-family: var(--font-code);
    font-size: 1.15rem;
    color: var(--accent-cyan);
    margin-bottom: 1.5rem;
    font-weight: 500;
}

.hero-bio {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-bottom: 2.5rem;
    max-width: 600px;
    line-height: 1.7;
}

.hero-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.hero-avatar-container {
    position: relative;
    display: flex;
    justify-content: center;
}

.hero-avatar-wrapper {
    position: relative;
    width: 320px;
    height: 320px;
    border-radius: 24px;
    overflow: hidden;
    border: 1px solid var(--border-card);
    background: var(--bg-surface);
}

.hero-avatar-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: grayscale(20%) contrast(105%);
    transition: filter var(--transition-smooth);
}

.hero-avatar-wrapper:hover .hero-avatar-img {
    filter: grayscale(0%) contrast(100%);
}

.hero-avatar-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 350px;
    height: 350px;
    background: radial-gradient(circle, var(--accent-emerald-glow) 0%, transparent 70%);
    z-index: -1;
    pointer-events: none;
}

/* Section Header */
.section-header {
    margin-bottom: 3.5rem;
}

.section-tag {
    font-family: var(--font-code);
    font-size: 0.85rem;
    color: var(--accent-emerald);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 0.5rem;
    display: block;
}

.section-title {
    font-size: 2.25rem;
    font-weight: 700;
}

/* Projects Section */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

.project-card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-card);
    border-radius: var(--radius-lg);
    padding: 2rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: transform var(--transition-smooth), border-color var(--transition-smooth), box-shadow var(--transition-smooth);
}

.project-card:hover {
    transform: translateY(-4px);
    border-color: var(--border-card-hover);
    box-shadow: 0 12px 30px -10px rgba(0, 0, 0, 0.5), 0 0 20px -5px var(--accent-emerald-glow);
}

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

.project-badge {
    font-family: var(--font-code);
    font-size: 0.75rem;
    padding: 0.25rem 0.65rem;
    background-color: rgba(6, 182, 212, 0.1);
    color: var(--accent-cyan);
    border: 1px solid rgba(6, 182, 212, 0.2);
    border-radius: var(--radius-full);
}

.project-title {
    font-size: 1.35rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.project-desc {
    font-size: 0.95rem;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

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

.project-tag {
    font-family: var(--font-code);
    font-size: 0.75rem;
    color: var(--text-muted);
    background-color: var(--bg-obsidian);
    padding: 0.2rem 0.6rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-card);
}

/* Experience & Education Section */
.timeline-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
}

.timeline-column-title {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.timeline-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.experience-card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-card);
    border-radius: var(--radius-md);
    padding: 1.75rem;
    transition: transform var(--transition-smooth), border-color var(--transition-smooth);
}

.experience-card:hover {
    transform: translateY(-4px);
    border-color: var(--border-card-hover);
}

.experience-period {
    font-family: var(--font-code);
    font-size: 0.8rem;
    color: var(--accent-emerald);
    margin-bottom: 0.5rem;
    display: block;
}

.experience-role {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.experience-org {
    font-size: 0.95rem;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
    font-weight: 500;
}

.experience-details {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.5;
}

/* Skills Matrix */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

.skill-category {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-card);
    border-radius: var(--radius-md);
    padding: 1.75rem;
}

.skill-category-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 1.25rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.skill-pills {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
}

.skill-pill {
    font-family: var(--font-code);
    font-size: 0.825rem;
    color: var(--text-primary);
    background-color: var(--bg-obsidian);
    border: 1px solid var(--border-card);
    padding: 0.4rem 0.85rem;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.skill-pill:hover {
    border-color: var(--accent-emerald);
    color: var(--accent-emerald);
    transform: translateY(-2px);
}

/* Tools Marquee (Hardware-accelerated 60fps) */
.marquee-section {
    padding: 4rem 0;
    background-color: var(--bg-surface);
    border-top: 1px solid var(--border-card);
    border-bottom: 1px solid var(--border-card);
}

.marquee {
    overflow: hidden;
    user-select: none;
    display: flex;
    gap: 2rem;
    position: relative;
    mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
    -webkit-mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
}

.marquee-track {
    display: flex;
    gap: 2rem;
    min-width: 100%;
    flex-shrink: 0;
    align-items: center;
    justify-content: space-around;
    animation: scrollMarquee 25s linear infinite;
    will-change: transform;
    transform: translateZ(0);
}

.marquee:hover .marquee-track {
    animation-play-state: paused;
}

@keyframes scrollMarquee {
    0% { transform: translate3d(0, 0, 0); }
    100% { transform: translate3d(-50%, 0, 0); }
}

.tool-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1.5rem;
    background-color: var(--bg-obsidian);
    border: 1px solid var(--border-card);
    border-radius: var(--radius-md);
    white-space: nowrap;
}

.tool-img {
    width: 24px;
    height: 24px;
    object-fit: contain;
}

.tool-name {
    font-family: var(--font-code);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-primary);
}

/* Footer */
.footer {
    padding: 4rem 0 2rem 0;
    border-top: 1px solid var(--border-card);
    background-color: var(--bg-obsidian);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2.5rem;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(31, 36, 51, 0.5);
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* Scroll Entrance Styles */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1), transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.animate-on-scroll.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive Breakpoints */
@media (max-width: 992px) {
    .hero-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
        text-align: center;
    }

    .hero-bio {
        margin-left: auto;
        margin-right: auto;
    }

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

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

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 72px;
        left: 0;
        width: 100%;
        background-color: var(--bg-surface);
        border-bottom: 1px solid var(--border-card);
        padding: 1.5rem;
        flex-direction: column;
        gap: 1.25rem;
        display: none;
    }

    .nav-menu.is-active {
        display: flex;
    }

    .mobile-toggle {
        display: block;
    }

    .hero-headline {
        font-size: 2.5rem;
    }

    .footer-content {
        flex-direction: column;
        gap: 1.5rem;
        text-align: center;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
}