:root {
    --matrix-green: #00ff7f;
    --matrix-green-dark: #008a45;
    --matrix-bg: #020804;
    --matrix-text: #c0e6d0;
    --matrix-text-dark: #80998c;
    --matrix-accent: #e0f5e8;
    --glow-color: rgba(0, 255, 127, 0.5);
    --font-body: 'Fira Code', monospace;
    --font-heading: 'Share Tech Mono', monospace;
}

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

html { scroll-behavior: smooth; }

body {
    background-color: var(--matrix-bg);
    color: var(--matrix-text);
    font-family: var(--font-body);
    line-height: 1.7;
    overflow: hidden;
}

/* Custom Scrollbar */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--matrix-bg); }
::-webkit-scrollbar-thumb { background: var(--matrix-green-dark); }
::-webkit-scrollbar-thumb:hover { background: var(--matrix-green); }

#matrix-background, .crt-overlay { position: fixed; inset: 0; z-index: -1; pointer-events: none; }
#matrix-background { z-index: -2; }
.crt-overlay {
    background: linear-gradient(rgba(18,16,16,0) 50%, rgba(0,0,0,0.25) 50%);
    background-size: 100% 2px;
    animation: crt-flicker 0.2s infinite;
}
@keyframes crt-flicker { 0%, 100% { opacity: 0.95; } 50% { opacity: 1; } }

/*----------------------------------------*/
#loader {
    position: fixed; inset: 0; z-index: 100;
    background: var(--matrix-bg);
    display: flex; align-items: center; justify-content: center;
    transition: opacity 0.5s 0.5s ease-out;
}
#loader-content { display: flex; align-items: center; gap: 1rem; }
.loader-grid {
    width: 2em; height: 2em;
    display: grid; grid-template-columns: 1fr 1fr; gap: 4px;
    animation: rotate-grid 2s linear infinite;
}
.loader-grid::before, .loader-grid::after { content: ''; display: block; background: var(--matrix-green); animation: pulse-grid 1s infinite alternate; }
.loader-grid::after { animation-delay: 0.5s; }
@keyframes rotate-grid { to { transform: rotate(360deg); } }
@keyframes pulse-grid { to { opacity: 0.2; } }
#loader-text {
    font-family: var(--font-heading);
    color: var(--matrix-green);
    font-size: 1.2rem;
    text-shadow: 0 0 8px var(--glow-color);
}
/*----------------------------------------*/
#main-interface { opacity: 0; transition: opacity 1s ease-in; display: flex; flex-direction: column; height: 100vh; }
.system-header {
    display: flex; justify-content: space-between; align-items: center;
    padding: 0.75rem 1.5rem;
    border-bottom: 1px solid var(--matrix-green-dark);
    background: rgba(2, 8, 4, 0.85);
    backdrop-filter: blur(8px);
    flex-shrink: 0;
}
.header-logo { font-family: var(--font-heading); font-size: 1.25rem; color: var(--matrix-accent); cursor: pointer; }
.system-nav { display: flex; gap: 1.5rem; }
.nav-item {
    color: var(--matrix-text-dark); text-decoration: none;
    font-family: var(--font-heading); transition: all 0.3s;
}
.nav-item:hover, .nav-item.active {
    color: var(--matrix-green); text-shadow: 0 0 5px var(--glow-color);
}
#system-status { font-size: 0.9rem; color: var(--matrix-text-dark); display: flex; align-items: center; gap: 1.5rem; }
#connection-status {
    width: 10px; height: 10px; border-radius: 50%;
    background-color: var(--matrix-green);
    box-shadow: 0 0 8px var(--glow-color);
    animation: pulse-connection 2s infinite;
}
@keyframes pulse-connection { 50% { opacity: 0.3; } }
.status-ok { color: var(--matrix-green); }

.system-content {
    max-width: 1200px; width: 100%; margin: 0 auto;
    padding: 3rem 1.5rem;
    overflow-y: auto;
    flex-grow: 1;
}
.content-section {
    padding: 2rem;
    border: 1px solid var(--matrix-green-dark);
    background: rgba(2, 8, 4, 0.7);
    margin-bottom: 4rem;
    opacity: 0; transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}
.content-section.visible { opacity: 1; transform: translateY(0); }
.section-title {
    font-family: var(--font-heading);
    font-size: 1.75rem; color: var(--matrix-green);
    margin-bottom: 2rem; border-bottom: 1px solid var(--matrix-green-dark);
    padding-bottom: 1rem;
    cursor: pointer;
}

/*----------------------------------------*/
.hero-container { display: grid; grid-template-columns: 2fr 1fr; gap: 3rem; align-items: center; }
.hero-text h1 {
    font-family: var(--font-heading); font-size: 3rem;
    color: var(--matrix-accent); letter-spacing: 2px;
    margin-bottom: 0.5rem;
}
.hero-tagline { font-size: 1.2rem; color: var(--matrix-text); margin-bottom: 1.5rem; }
.hero-desc { color: var(--matrix-text-dark); max-width: 60ch; }
.hero-desc::before { content: '>> '; color: var(--matrix-green-dark); }
.hero-image-container { position: relative; justify-self: center; }
.profile-image {
    width: 250px; height: 250px; object-fit: cover;
    border: 1px solid var(--matrix-green-dark);
    filter: grayscale(1) contrast(1.2);
    opacity: 0.8;
}
.image-scanline {
    position: absolute; inset: 0; background: var(--matrix-green);
    width: 100%; height: 2px;
    box-shadow: 0 0 10px var(--glow-color);
    opacity: 0;
}
.hero-image-container:hover .image-scanline {
    opacity: 1; animation: scan-y 2s infinite cubic-bezier(0.4, 0, 0.2, 1);
}
@keyframes scan-y {
    0% { transform: translateY(0); }
    50% { transform: translateY(100%); }
    100% { transform: translateY(0); }
}

/*----------------------------------------*/
.skills-grid { 
    display: grid; 
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); 
    gap: 2.5rem; 
}

.skill-category-title {
    font-family: var(--font-heading); 
    color: var(--matrix-accent);
    font-size: 1.25rem; 
    margin-bottom: 1.5rem;
    border-left: 2px solid var(--matrix-green);
    padding-left: 1rem;
}

.skill-list { 
    list-style: none; 
    padding-left: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.skill-item {
    color: var(--matrix-text);
    background-color: var(--matrix-green-dark);
    border: 1px solid var(--matrix-green-dark);
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
    transition: all 0.3s ease;
    cursor: default;
}

.skill-item:hover {
    color: var(--matrix-bg);
    background-color: var(--matrix-green);
    border-color: var(--matrix-green);
    text-shadow: none;
    box-shadow: 0 0 10px var(--glow-color);
}


.projects-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 1.5rem; }
.project-card {
    border: 1px solid var(--matrix-green-dark);
    background: var(--matrix-bg);
    display: flex; flex-direction: column;
    transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
    text-decoration: none;
}
.project-card:hover { transform: translateY(-5px); box-shadow: 0 0 15px -5px var(--glow-color); border-color: var(--matrix-green); }
.project-header { display: flex; justify-content: space-between; align-items: center; padding: 0.75rem 1rem; border-bottom: 1px solid var(--matrix-green-dark); }
.project-title { font-family: var(--font-heading); font-size: 1.25rem; color: var(--matrix-accent); }
.project-status { font-size: 0.8rem; color: var(--matrix-green); }
.project-content { padding: 1rem; flex-grow: 1; display: flex; flex-direction: column; }
.project-desc { font-size: 0.9rem; color: var(--matrix-text-dark); margin-bottom: 1rem; flex-grow: 1;}
.project-tags { display: flex; gap: 0.5rem; flex-wrap: wrap; }
.project-tag { font-size: 0.8rem; color: var(--matrix-green-dark); }


/*----------------------------------------*/
.contact-container { max-width: 800px; margin: 0 auto; text-align: center; }
.contact-brief { font-size: 1.1rem; color: var(--matrix-text-dark); margin-bottom: 2.5rem; }
.contact-links { display: flex; justify-content: center; flex-wrap: wrap; gap: 1rem; }
.contact-link {
    color: var(--matrix-green); border: 1px solid var(--matrix-green-dark);
    padding: 0.75rem 1.5rem; text-decoration: none;
    transition: background-color 0.3s, color 0.3s;
    font-family: var(--font-heading);
}
.contact-link.resume-link { border-color: var(--matrix-green); }
.contact-link:hover { background-color: var(--matrix-green); color: var(--matrix-bg); }


@media (max-width: 900px) {
    .system-nav, #system-status { display: none; }
    .system-header { justify-content: center; }
    .hero-container { grid-template-columns: 1fr; }
    .hero-image-container { order: -1; margin-bottom: 2rem; }
    .hero-text { text-align: center; }
    .hero-desc { margin: 0 auto; }
}
@media (max-width: 600px) {
    .hero-text h1 { font-size: 2.5rem; }
    .hero-tagline { font-size: 1rem; }
    .hero-image-container { width: 200px; height: 200px; }
    .profile-image { width: 100%; height: 100%; }
    .content-section { padding: 1.5rem; }
    .section-title { font-size: 1.5rem; }
}