:root {
    /* Color Palette - Premium Tech Theme */
    --bg-deep: #050507;
    --bg-surface: #0a0a0f;
    --accent-primary: #8a2be2;
    --accent-secondary: #00d2ff;
    --text-main: #ffffff;
    --text-muted: #94a3b8;
    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.1);
    --gradient-hero: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    --glow-purple: rgba(138, 43, 226, 0.3);
    --glow-cyan: rgba(0, 210, 255, 0.3);

    /* Typography */
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;

    /* Layout */
    --container-max: 1200px;
}

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

html {
    scroll-behavior: smooth;
}

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

.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 2rem;
}

/* Header & Nav */
header {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    backdrop-filter: blur(15px);
    border-bottom: 1px solid var(--glass-border);
    background: rgba(5, 5, 7, 0.7);
    padding: 1.25rem 0;
}

header nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1.6rem;
    letter-spacing: -1px;
    text-transform: uppercase;
}

.logo span {
    color: var(--accent-secondary);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2.5rem;
    align-items: center;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-muted);
    font-weight: 500;
    font-size: 0.9rem;
    transition: color 0.3s ease;
    text-transform: uppercase;
}

.nav-links a:hover {
    color: var(--text-main);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding-top: 100px;
    background: radial-gradient(circle at 10% 20%, rgba(138, 43, 226, 0.15), transparent 40%),
        radial-gradient(circle at 90% 80%, rgba(0, 210, 255, 0.15), transparent 40%);
}

.hero-bg-visual {
    position: absolute;
    top: 0;
    right: 0;
    width: 70%;
    height: 100%;
    background: url('../assets/hero_server_room.png') no-repeat center right;
    background-size: cover;
    z-index: -1;
    mask-image: linear-gradient(to left, rgba(0, 0, 0, 1) 30%, transparent 100%);
    -webkit-mask-image: linear-gradient(to left, rgba(0, 0, 0, 1) 30%, transparent 100%);
    opacity: 0.5;
}

h1 {
    font-family: var(--font-heading);
    font-size: 5rem;
    font-weight: 800;
    line-height: 1;
    margin-bottom: 2rem;
    letter-spacing: -2px;
}

.gradient-text {
    background: var(--gradient-hero);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.lead {
    font-size: 1.4rem;
    color: var(--text-muted);
    max-width: 650px;
    margin-bottom: 3rem;
    font-weight: 300;
}

/* Buttons */
.btn-primary {
    background: var(--gradient-hero);
    color: var(--bg-deep);
    padding: 1.25rem 2.5rem;
    border-radius: 4px;
    text-decoration: none;
    font-weight: 800;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: inline-block;
    text-transform: uppercase;
    font-size: 0.9rem;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 30px var(--glow-purple);
}

.btn-outline {
    border: 1px solid var(--glass-border);
    color: var(--text-main);
    padding: 1.25rem 2.5rem;
    border-radius: 4px;
    text-decoration: none;
    font-weight: 700;
    margin-left: 1.5rem;
    transition: background 0.3s ease, border-color 0.3s ease;
    display: inline-block;
    text-transform: uppercase;
    font-size: 0.9rem;
}

.btn-outline:hover {
    background: var(--glass-bg);
    border-color: var(--accent-secondary);
}

/* Sections */
.section {
    padding: 10rem 0;
}

.bg-alt {
    background-color: var(--bg-surface);
}

.section-title {
    font-family: var(--font-heading);
    font-size: 3.5rem;
    margin-bottom: 5rem;
    letter-spacing: -1px;
}

/* Glass Card */
.glass-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    backdrop-filter: blur(20px);
    overflow: hidden;
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275), border-color 0.3s ease;
}

.glass-card:hover {
    border-color: var(--accent-primary);
    transform: translateY(-10px);
}

/* About Card */
.about-card {
    max-width: 900px;
    margin: 0 auto;
    padding: 4rem;
    text-align: left;
    position: relative;
    overflow: hidden;
}

.about-card p {
    font-size: 1.2rem;
    color: var(--text-muted);
}

.about-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--gradient-hero);
}

/* Skills Grid (Mockup Style) */
.skills-grid-glass {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1.5rem;
}

.skill-item {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    padding: 2.5rem 1.5rem;
    border-radius: 8px;
    text-align: center;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.skill-item:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--accent-secondary);
    box-shadow: 0 0 30px var(--glow-cyan);
}

.skill-icon {
    width: 50px;
    height: 50px;
    background: var(--glass-bg);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

/* Placeholder for CSS-only icons */
.skill-icon::after {
    content: '';
    width: 25px;
    height: 25px;
    background: currentColor;
    mask-size: contain;
    mask-repeat: no-repeat;
    mask-position: center;
    opacity: 0.8;
}

.skill-item span {
    font-weight: 600;
    font-family: var(--font-heading);
    letter-spacing: 1px;
    font-size: 0.85rem;
    text-transform: uppercase;
}

/* Projects */
.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 3rem;
}

.card-img-placeholder {
    height: 300px;
    background: #111116;
    background-size: cover;
    background-position: center;
    transition: transform 0.5s ease;
}

.project-card:hover .card-img-placeholder {
    transform: scale(1.05);
}

#project-1-img {
    background-image: url('../assets/project-1.png');
}

#project-2-img {
    background-image: url('../assets/project-2.png');
}

.card-content {
    padding: 2.5rem;
    text-align: left;
}

.card-content h3 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
    font-family: var(--font-heading);
}

.card-content p {
    color: var(--text-muted);
    margin-bottom: 2rem;
}

.tags {
    display: flex;
    gap: 0.75rem;
}

.tags span {
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    background: rgba(255, 255, 255, 0.05);
    padding: 6px 16px;
    border-radius: 100px;
    color: var(--accent-secondary);
    border: 1px solid rgba(0, 210, 255, 0.1);
}

/* Contact form */
.contact-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.75rem;
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--text-muted);
}

.form-group input,
.form-group textarea {
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--glass-border);
    border-radius: 4px;
    padding: 1.25rem;
    width: 100%;
    color: #fff;
    font-family: inherit;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
}

/* Reveal Animation */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: all 1s cubic-bezier(0.215, 0.61, 0.355, 1);
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* Footer */
.footer {
    padding: 5rem 0;
    border-top: 1px solid var(--glass-border);
}

.footer-content p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.social-links {
    margin-top: 2rem;
    display: flex;
    justify-content: center;
    gap: 3rem;
}

.social-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 700;
    font-size: 0.8rem;
    text-transform: uppercase;
    transition: color 0.3s ease;
}

.social-links a:hover {
    color: var(--accent-primary);
}

@media (max-width: 768px) {
    h1 {
        font-size: 3.5rem;
    }

    .nav-links {
        display: none;
    }

    .project-grid {
        grid-template-columns: 1fr;
    }

    .btn-outline {
        margin-left: 0;
        margin-top: 1rem;
        width: 100%;
        text-align: center;
    }

    .btn-primary {
        width: 100%;
        text-align: center;
    }
}