/* Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}

:root {
    --bg-main: #05070b;
    --bg-panel: rgba(18, 18, 20, 0.96);
    --border-subtle: #2a2a2a;
    --accent: #4f46e5;               /* royal blue */
    --accent-strong: #1d4ed8;        /* deeper royal blue */
    --accent-soft: rgba(79, 70, 229, 0.18);
    --text-main: #e5e5e5;
    --text-muted: #a3a3a3;
}

body {
    background: radial-gradient(circle at top, #171b2a 0, var(--bg-main) 40%, #020308 100%);
    color: var(--text-main);
    min-height: 100vh;
    overflow-x: hidden;
    touch-action: pan-y;
    line-height: 1.5;
}

/* 3D Scene Container */
#scene-container {
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    width: 100vw !important;
    height: 100vh !important;
    z-index: 0 !important;
}

/* Navigation */
.nav-banner {
    position: fixed;
    top: 0;
    width: 100%;
    padding: 1.25rem 1.5rem;
    background: rgba(5, 7, 11, 0.96);
    border-bottom: 1px solid var(--border-subtle);
    z-index: 1000;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.nav-links {
    display: flex;
    gap: 1.5rem;
    white-space: nowrap;
    padding: 0 1rem;
}

.nav-links a {
    color: var(--text-main);
    text-decoration: none;
    padding: 0.8rem 1.2rem;
    border-radius: 4px;
    transition: color 0.25s ease, background-color 0.25s ease, box-shadow 0.25s ease;
    flex-shrink: 0;
    background: transparent;
}

.nav-links a:hover {
    background: var(--accent-soft);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.45);
    color: #ffffff;
}

/* Hero Section */
.hero {
    position: relative;
    z-index: 100;
    padding: 8rem 2rem 2rem;
    max-width: 880px;
    margin: 0 auto;
}

.hero h1 {
    font-size: 2.6rem;
    margin-bottom: 1.5rem;
    color: #f9fafb;
    line-height: 1.2;
}

.hero-ctas {
    margin-top: 1rem;
    display: flex;
    gap: 0.75rem;
}
/* Projects Grid */
.project-grid {
    padding: 8rem 2rem 2rem;
    display: grid;
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.project-card {
    background: var(--bg-panel);
    padding: 2rem;
    border-radius: 10px;
    border: 1px solid var(--border-subtle);
    backdrop-filter: blur(14px);
}

.tech-stack span {
    display: inline-block;
    padding: 0.3rem 0.8rem;
    margin: 0.5rem 0.3rem;
    background: var(--accent-soft);
    border: 1px solid var(--accent);
    border-radius: 4px;
    font-size: 0.9rem;
}

/* About Page */
.glass-panel {
    max-width: 860px;
    margin: 8rem auto;
    padding: 3rem;
    background: var(--bg-panel);
    border-radius: 10px;
    backdrop-filter: blur(14px);
    border: 1px solid var(--border-subtle);
}

.expertise-item {
    padding: 1.5rem;
    margin: 1.5rem 0;
    background: rgba(79, 70, 229, 0.08);
    border-left: 3px solid var(--accent);
}

/* Contact Page */
.contact-container {
    max-width: 600px;
    margin: 8rem auto;
    padding: 2rem;
    background: var(--bg-panel);
    border-radius: 10px;
    backdrop-filter: blur(14px);
}

.form-group {
    margin-bottom: 1.5rem;
}

input, textarea {
    width: 100%;
    padding: 1rem;
    background: #0f1116;
    border: 1px solid var(--border-subtle);
    color: var(--text-main);
    border-radius: 4px;
}

button[type="submit"] {
    background: linear-gradient(45deg, var(--accent), var(--accent-strong));
    color: #000;
    padding: 1rem 2rem;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-weight: bold;
    transition: transform 0.3s ease;
}

button[type="submit"]:hover {
    transform: translateY(-2px);
}

/* Social Footer */
.social-footer {
    position: fixed !important;
    bottom: 2rem !important;
    left: 50% !important;
    transform: translateX(-50%);
    display: flex;
    gap: 2rem;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.social-icon {
    font-size: 1.5rem;
    color: #e0e0e0;
    transition: all 0.3s ease;
}

.social-icon:hover {
    color: var(--accent);
    transform: scale(1.2);
}

/* Mobile Styles */
@media (max-width: 768px) {
    .nav-banner {
        padding: 1rem;
    }
    
    .nav-links {
        gap: 1rem;
        padding: 0 0.5rem;
    }
    
    .nav-links a {
        padding: 0.6rem 1rem;
        font-size: 0.9rem;
    }
    
    .hero {
        padding: 6rem 1.5rem 1.5rem;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .project-grid,
    .glass-panel,
    .contact-container {
        padding: 6rem 1.5rem 1.5rem;
    }
    
    #scene-container {
        z-index: -1;
    }
}

.button-link {
    display: inline-block;
    margin-top: 1em;
    padding: 0.5em 1.25em;
    background-color: #222;
    color: #fff;
    border-radius: 5px;
    text-decoration: none;
    transition: background-color 0.3s ease;
}

.button-link:hover {
    background-color: #444;
}