/* =====================
   CSS Variables
   ===================== */
:root {
    /* Colors */
    --color-bg: #000000;
    --color-bg-secondary: #0a0a0a;
    --color-bg-tertiary: #141414;
    --color-accent: #00ff88;
    --color-accent-hover: #00dd77;
    --color-text-primary: #ffffff;
    --color-text-secondary: #b0b0b0;
    --color-text-tertiary: #808080;
    --color-border: #1a1a1a;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;

    /* Typography */
    --font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;

    /* Effects */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    --border-radius-sm: 0.25rem;
    --border-radius-md: 0.375rem;
    --border-radius-lg: 0.5rem;
    --box-shadow: 0 0 20px rgba(0, 255, 136, 0.1);
    --box-shadow-lg: 0 0 40px rgba(0, 255, 136, 0.15);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text-primary);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* =====================
   Typography
   ===================== */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 600;
    line-height: 1.2;
    color: var(--color-text-primary);
}

h1 {
    font-size: var(--font-size-5xl);
}

h2 {
    font-size: var(--font-size-4xl);
}

h3 {
    font-size: var(--font-size-2xl);
}

p {
    margin-bottom: var(--spacing-md);
    color: var(--color-text-secondary);
}

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

/* =====================
   Container & Layout
   ===================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-md);
    }
}

/* =====================
   Navigation
   ===================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(0, 0, 0, 0.9);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) 0;
}

.logo {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--color-accent);
    letter-spacing: -0.02em;
}

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

.nav-links a {
    color: var(--color-text-secondary);
    font-weight: 500;
    transition: color var(--transition-base);
}

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

@media (max-width: 768px) {
    .nav-links {
        gap: var(--spacing-md);
    }

    .nav-links a {
        font-size: var(--font-size-sm);
    }
}

/* =====================
   Hero Section
   ===================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: var(--spacing-3xl);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(0, 255, 136, 0.08) 0%, transparent 70%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
}

.hero-badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    background-color: rgba(0, 255, 136, 0.05);
    border: 1px solid rgba(0, 255, 136, 0.2);
    border-radius: 50px;
    font-size: var(--font-size-sm);
    color: var(--color-accent);
    margin-bottom: var(--spacing-lg);
    font-weight: 500;
}

.hero-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    margin-bottom: var(--spacing-lg);
    font-weight: 600;
    letter-spacing: -0.02em;
    line-height: 1.1;
}

.hero-title .accent {
    color: var(--color-accent);
}

.hero-description {
    font-size: var(--font-size-lg);
    line-height: 1.8;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xl);
    max-width: 700px;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

@media (max-width: 768px) {
    .hero {
        min-height: 80vh;
    }

    .hero-description {
        font-size: var(--font-size-base);
    }
}

/* =====================
   Buttons
   ===================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-base);
    font-weight: 600;
    border-radius: var(--border-radius-md);
    transition: all var(--transition-base);
    cursor: pointer;
    border: none;
    text-align: center;
}

.btn-primary {
    background-color: var(--color-accent);
    color: #000000;
    font-weight: 600;
}

.btn-primary:hover {
    background-color: var(--color-accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 0 30px rgba(0, 255, 136, 0.3);
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-text-primary);
    border: 1px solid rgba(0, 255, 136, 0.3);
}

.btn-secondary:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
    transform: translateY(-2px);
    background-color: rgba(0, 255, 136, 0.05);
}

/* =====================
   Sections
   ===================== */
section {
    padding: var(--spacing-3xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section-title {
    margin-bottom: var(--spacing-md);
}

.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-tertiary);
}

/* =====================
   Tech Focus Section
   ===================== */
.tech-focus {
    background-color: var(--color-bg-secondary);
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.tech-card {
    padding: var(--spacing-xl);
    background-color: var(--color-bg-tertiary);
    border: 1px solid rgba(0, 255, 136, 0.1);
    border-radius: var(--border-radius-md);
    transition: all var(--transition-base);
}

.tech-card:hover {
    transform: translateY(-4px);
    border-color: rgba(0, 255, 136, 0.4);
    box-shadow: 0 0 30px rgba(0, 255, 136, 0.1);
}

.tech-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(0, 255, 136, 0.05);
    border-radius: var(--border-radius-md);
    color: var(--color-accent);
    margin-bottom: var(--spacing-md);
}

.tech-card h3 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-primary);
    font-weight: 600;
}

.tech-card p {
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
    margin-bottom: 0;
}

/* =====================
   Projects Section
   ===================== */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-xl);
}

.project-card {
    background-color: var(--color-bg-secondary);
    border: 1px solid rgba(0, 255, 136, 0.1);
    border-radius: var(--border-radius-md);
    padding: var(--spacing-xl);
    transition: all var(--transition-base);
}

.project-card:hover {
    transform: translateY(-4px);
    border-color: rgba(0, 255, 136, 0.4);
    box-shadow: 0 0 30px rgba(0, 255, 136, 0.1);
}

.project-title {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-md);
    color: var(--color-text-primary);
    font-weight: 600;
}

.project-description {
    font-size: var(--font-size-base);
    line-height: 1.7;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-lg);
}

.tech-tag {
    padding: var(--spacing-xs) var(--spacing-sm);
    background-color: rgba(0, 255, 136, 0.05);
    border: 1px solid rgba(0, 255, 136, 0.2);
    border-radius: var(--border-radius-sm);
    font-size: var(--font-size-xs);
    color: var(--color-accent);
    font-weight: 500;
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--color-accent);
    font-weight: 600;
    font-size: var(--font-size-sm);
    transition: all var(--transition-fast);
}

.project-link:hover {
    gap: var(--spacing-sm);
}

/* =====================
   Skills Section
   ===================== */
.skills {
    background-color: var(--color-bg-secondary);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
}

.skill-category {
    padding: var(--spacing-xl);
    background-color: var(--color-bg-tertiary);
    border: 1px solid rgba(0, 255, 136, 0.1);
    border-radius: var(--border-radius-md);
}

.category-title {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-lg);
    color: var(--color-text-primary);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid rgba(0, 255, 136, 0.2);
    font-weight: 600;
}

.skill-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.skill-item {
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--color-bg);
    border: 1px solid rgba(0, 255, 136, 0.15);
    border-radius: var(--border-radius-sm);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
}

.skill-item:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
    transform: translateY(-2px);
}

/* =====================
   About Section
   ===================== */
.about-content {
    max-width: 800px;
    margin: 0 auto;
}

.about-text {
    font-size: var(--font-size-lg);
    line-height: 1.8;
}

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

/* =====================
   Contact Section
   ===================== */
.contact {
    background-color: var(--color-bg-secondary);
}

.contact-content {
    max-width: 500px;
    margin: 0 auto;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.form-group label {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-text-primary);
}

.form-group input,
.form-group textarea {
    padding: var(--spacing-md);
    background-color: var(--color-bg-tertiary);
    border: 1px solid rgba(0, 255, 136, 0.15);
    border-radius: var(--border-radius-sm);
    font-size: var(--font-size-base);
    color: var(--color-text-primary);
    font-family: var(--font-family);
    transition: border-color var(--transition-base);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 20px rgba(0, 255, 136, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.social-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: var(--spacing-md);
}

.social-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-xl);
    background-color: var(--color-bg-tertiary);
    border: 1px solid rgba(0, 255, 136, 0.15);
    border-radius: var(--border-radius-md);
    font-weight: 500;
    transition: all var(--transition-base);
    text-align: center;
}

.social-link:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
    transform: translateY(-4px);
    box-shadow: 0 0 30px rgba(0, 255, 136, 0.15);
}

/* =====================
   Footer
   ===================== */
.footer {
    padding: var(--spacing-xl) 0;
    background-color: var(--color-bg);
    border-top: 1px solid rgba(0, 255, 136, 0.1);
}

.footer-content {
    text-align: center;
}

.footer-content p {
    color: var(--color-text-tertiary);
    font-size: var(--font-size-sm);
    margin: 0;
}

/* =====================
   Animations
   ===================== */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

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

/* Stagger animation for grid items */
.tech-grid .reveal.active,
.projects-grid .reveal.active,
.skills-grid .reveal.active {
    animation: slideUp 0.6s ease forwards;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Hover glow effect */
.tech-card:hover .tech-icon,
.project-card:hover .project-title {
    text-shadow: 0 0 20px rgba(0, 255, 136, 0.4);
}

/* =====================
   Responsive Design
   ===================== */
@media (max-width: 768px) {
    :root {
        --font-size-5xl: 2rem;
        --font-size-4xl: 1.75rem;
        --spacing-3xl: 3rem;
    }

    .tech-grid,
    .projects-grid,
    .skills-grid {
        grid-template-columns: 1fr;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }
}

/* =====================
   Utility Classes
   ===================== */
.accent {
    color: var(--color-accent);
}

.text-center {
    text-align: center;
}

.mb-0 {
    margin-bottom: 0;
}