/* Modern 3D Portfolio Design System for Emre Gencoglu */
:root {
    --bg-color: #000000;
    --text-color: #ffffff;
    --accent-color: #ff3366; /* Vibrant accent for interaction */
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --font-serif: 'Newsreader', serif;
    --font-sans: 'Inter', sans-serif;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-sans);
    overflow-x: hidden;
    /* Allow scrolling but hide the bar */
    height: 1000vh; /* Long scroll for the 3D tunnel */
}

/* 3D Canvas Background */
#three-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

/* UI Overlay */
.ui-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 10;
    pointer-events: none; /* Let clicks pass to 3D canvas */
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 2rem;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    pointer-events: auto; /* Re-enable for nav */
}

.logo {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.05em;
}

nav a {
    color: var(--text-color);
    text-decoration: none;
    margin-left: 1.5rem;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    opacity: 0.8;
    transition: opacity 0.3s;
}

nav a:hover {
    opacity: 1;
}

/* Hero Section */
.hero-3d {
    max-width: 800px;
}

h1 {
    font-family: var(--font-serif);
    font-size: clamp(3rem, 10vw, 8rem);
    line-height: 0.9;
    font-weight: 200;
    font-style: italic;
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: -0.02em;
}

p {
    font-size: 1rem;
    opacity: 0.6;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

/* Scroll Indicator */
.scroll-indicator {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.mouse {
    width: 20px;
    height: 35px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 10px;
    position: relative;
}

.mouse::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 8px;
    width: 2px;
    height: 6px;
    background: var(--text-color);
    transform: translateX(-50%);
    animation: scrollMove 2s infinite;
}

@keyframes scrollMove {
    0% { opacity: 0; transform: translate(-50%, 0); }
    50% { opacity: 1; transform: translate(-50%, 5px); }
    100% { opacity: 0; transform: translate(-50%, 10px); }
}

footer {
    position: fixed;
    bottom: 1rem;
    right: 2rem;
    font-size: 0.7rem;
    opacity: 0.4;
    z-index: 10;
}

/* 3D Interaction Pointer */
body.interacting #three-canvas {
    cursor: pointer;
}

/* Mobile Adjustments */
@media (max-width: 768px) {
    h1 { font-size: 4rem; }
}