/* 
   IT Executive Portfolio - Premium Dark Theme 
   Design System & Core Styles
*/

:root {
    /* Color Palette */
    --bg-primary: #050505;
    --bg-secondary: #0f0f12;
    --bg-card: rgba(255, 255, 255, 0.03);
    --bg-glass: rgba(10, 10, 10, 0.7);

    --accent-primary: #00f2ea;
    /* Cyan Neon */
    --accent-secondary: #7000ff;
    /* Electric Purple */
    --accent-gold: #ffd700;
    /* Executive Gold */

    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --text-muted: #666666;

    /* Gradients */
    --gradient-main: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    --gradient-text: linear-gradient(to right, #fff, #a0a0a0);
    --gradient-gold: linear-gradient(135deg, #ffd700, #b8860b);

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

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 8rem;

    /* Effects */
    --shadow-glow: 0 0 20px rgba(0, 242, 234, 0.3);
    --glass-border: 1px solid rgba(255, 255, 255, 0.1);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    display: block;
}

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

.section-title {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-lg);
    text-align: center;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    position: relative;
    display: inline-block;
    left: 50%;
    transform: translateX(-50%);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: var(--gradient-main);
    border-radius: 2px;
}

/* Layout Utilities */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

section {
    padding: var(--spacing-xl) 0;
}

/* Components */
.btn {
    display: inline-block;
    padding: 12px 32px;
    border-radius: 50px;
    font-weight: 600;
    letter-spacing: 0.5px;
    position: relative;
    overflow: hidden;
    z-index: 1;
    cursor: pointer;
}

.btn-primary {
    background: var(--gradient-main);
    color: #000;
    box-shadow: 0 4px 15px rgba(0, 242, 234, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 242, 234, 0.5);
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--accent-primary);
    color: var(--accent-primary);
}

.btn-outline:hover {
    background: rgba(0, 242, 234, 0.1);
    transform: translateY(-2px);
}

/* Header & Nav */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(5, 5, 5, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: var(--glass-border);
    padding: 1rem 0;
}

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

.logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -1px;
}

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

.nav-links {
    display: flex;
    gap: var(--spacing-md);
}

.nav-links a {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--accent-primary);
}

.menu-toggle {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
}

/* Hero Section */
.hero {
    min-height: auto;
    display: flex;
    align-items: center;
    position: relative;
    padding-top: 140px;
    padding-bottom: var(--spacing-lg);
    /* Header height */
    background: radial-gradient(circle at 20% 20%, rgba(0, 242, 234, 0.05) 0%, transparent 40%),
        radial-gradient(circle at 80% 80%, rgba(112, 0, 255, 0.05) 0%, transparent 40%);
}

#about {
    padding-top: 0;
}

.hero-content {
    max-width: 800px;
}

.hero-subtitle {
    color: var(--accent-primary);
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: var(--spacing-sm);
    display: block;
}

.hero h1 {
    font-size: 4rem;
    margin-bottom: var(--spacing-sm);
    line-height: 1.1;
}

.hero h1 span {
    background: var(--gradient-main);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-description {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    max-width: 600px;
}

.hero-actions {
    display: flex;
    gap: var(--spacing-sm);
}

/* About Section */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.about-image {
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    aspect-ratio: 1/1;
    background: var(--bg-card);
    border: var(--glass-border);
}

.about-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.8;
}

.about-text h3 {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

/* Skills Section */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

.skill-card {
    background: var(--bg-card);
    border: var(--glass-border);
    padding: var(--spacing-md);
    border-radius: 16px;
    transition: var(--transition);
}

.skill-card:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--accent-primary);
}

.skill-icon {
    font-size: 2rem;
    color: var(--accent-primary);
    margin-bottom: var(--spacing-sm);
}

.skill-card h4 {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-xs);
}

.skill-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* Experience Section */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 2px;
    background: rgba(255, 255, 255, 0.1);
}

.timeline-item {
    position: relative;
    padding-left: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.timeline-dot {
    position: absolute;
    left: -4px;
    top: 0;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--accent-primary);
    box-shadow: 0 0 10px var(--accent-primary);
}

.timeline-date {
    font-size: 0.9rem;
    color: var(--accent-primary);
    margin-bottom: var(--spacing-xs);
    display: block;
}

.timeline-content h3 {
    font-size: 1.5rem;
    margin-bottom: 5px;
}

.timeline-content h4 {
    font-size: 1.1rem;
    color: var(--text-secondary);
    font-weight: 400;
    margin-bottom: var(--spacing-sm);
}

.timeline-content ul {
    list-style: disc;
    padding-left: 1.2rem;
    color: var(--text-secondary);
}

/* Contact Section */
.contact-container {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.contact-card {
    background: var(--bg-card);
    border: var(--glass-border);
    padding: var(--spacing-lg);
    border-radius: 24px;
    margin-top: var(--spacing-md);
}

.contact-info {
    margin-bottom: var(--spacing-md);
}

.contact-item {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    color: var(--text-secondary);
}

.contact-item i {
    color: var(--accent-primary);
}

/* Footer */
footer {
    background: var(--bg-secondary);
    padding: var(--spacing-md) 0;
    text-align: center;
    border-top: var(--glass-border);
}

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

/* Responsive */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.5rem;
    }

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

    .nav-links {
        display: none;
        /* Mobile menu implementation needed in JS */
    }

    .menu-toggle {
        display: block;
    }

    .timeline::before {
        left: 0;
    }
}