/* ===========================
   CSS Variables & Reset
   =========================== */
:root {
    /* Colors - Dark Mode Friendly */
    --color-bg: #0a0a0a;
    --color-bg-secondary: #151515;
    --color-bg-tertiary: #1a1a1a;
    --color-text-primary: #e5e5e5;
    --color-text-secondary: #a0a0a0;
    --color-accent: #3b82f6;
    --color-accent-hover: #2563eb;
    --color-border: #2a2a2a;
    --color-success: #22c55e;
    
    /* Typography */
    --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    --font-mono: 'Courier New', monospace;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* Layout */
    --max-width: 1200px;
    --border-radius: 8px;
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    background-color: var(--color-bg);
    color: var(--color-text-primary);
    line-height: 1.6;
    font-size: 16px;
}

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

/* ===========================
   Navigation
   =========================== */
.nav {
    position: fixed;
    top: 0;
    width: 100%;
    background-color: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
    transition: var(--transition);
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-accent);
    text-decoration: none;
    transition: var(--transition);
}

.logo:hover {
    opacity: 0.8;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
}

.nav-link {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    transition: var(--transition);
    position: relative;
}

.nav-link:hover {
    color: var(--color-text-primary);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-accent);
    transition: var(--transition);
}

.nav-link:hover::after {
    width: 100%;
}

/* ===========================
   Hero Section
   =========================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: var(--spacing-xl) 0;
    background: linear-gradient(135deg, var(--color-bg) 0%, var(--color-bg-secondary) 100%);
}

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

.hero-image-container {
    width: 180px;
    height: 180px;
    margin: 0 auto var(--spacing-md);
    border-radius: 50%;
    overflow: hidden;
    border: 4px solid var(--color-accent);
    box-shadow: 0 10px 40px rgba(59, 130, 246, 0.3);
}

.hero-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    background: linear-gradient(135deg, #e5e5e5 0%, #a0a0a0 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-accent);
    margin-bottom: var(--spacing-md);
    font-weight: 500;
}

.hero-description {
    font-size: 1.15rem;
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto var(--spacing-md);
}

.hero-cta {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
}

/* ===========================
   Buttons
   =========================== */
.btn {
    display: inline-block;
    padding: 0.875rem 2rem;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: var(--transition);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background-color: var(--color-accent);
    color: white;
}

.btn-primary:hover {
    background-color: var(--color-accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(59, 130, 246, 0.3);
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-text-primary);
    border: 2px solid var(--color-border);
}

.btn-secondary:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.btn-outline {
    background-color: transparent;
    color: var(--color-accent);
    border: 2px solid var(--color-accent);
    padding: 0.625rem 1.5rem;
    font-size: 0.9rem;
}

.btn-outline:hover {
    background-color: var(--color-accent);
    color: white;
}

/* ===========================
   Section Styles
   =========================== */
.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-lg);
    color: var(--color-text-primary);
}

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

/* ===========================
   Proof / Metrics Section
   =========================== */
.proof {
    background-color: var(--color-bg-secondary);
}

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

.metric-card {
    background-color: var(--color-bg-tertiary);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    text-align: center;
    border: 1px solid var(--color-border);
    transition: var(--transition);
}

.metric-card:hover {
    border-color: var(--color-accent);
    transform: translateY(-5px);
}

.metric-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-accent);
    margin-bottom: var(--spacing-xs);
}

.metric-label {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
}

.proof-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
    margin-top: var(--spacing-lg);
}

.proof-image-container {
    position: relative;
    background-color: var(--color-bg-tertiary);
    border-radius: var(--border-radius);
    overflow: hidden;
    border: 1px solid var(--color-border);
}

.proof-image {
    width: 100%;
    height: auto;
    display: block;
}

.proof-placeholder {
    padding: var(--spacing-lg);
    text-align: center;
    min-height: 300px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.proof-placeholder p:first-child {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

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

.proof-text h3 {
    font-size: 1.75rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-primary);
}

.proof-text p {
    color: var(--color-text-secondary);
    line-height: 1.8;
}

/* ===========================
   Projects Section
   =========================== */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.project-card {
    background-color: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    transition: var(--transition);
}

.project-card:hover {
    border-color: var(--color-accent);
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(59, 130, 246, 0.2);
}

.project-name {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-primary);
}

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

.project-role {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-sm);
}

.project-highlights {
    list-style: none;
    margin: var(--spacing-sm) 0;
    padding-left: 0;
}

.project-highlights li {
    color: var(--color-text-secondary);
    padding-left: 1.5rem;
    position: relative;
    margin-bottom: var(--spacing-xs);
    font-size: 0.9rem;
}

.project-highlights li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-weight: bold;
}

/* ===========================
   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-md);
}

.skill-category {
    background-color: var(--color-bg-tertiary);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    border: 1px solid var(--color-border);
    transition: var(--transition);
}

.skill-category:hover {
    border-color: var(--color-accent);
}

.skill-category-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-accent);
}

.skill-list {
    list-style: none;
}

.skill-list li {
    padding: var(--spacing-xs) 0;
    color: var(--color-text-secondary);
    border-bottom: 1px solid var(--color-border);
    transition: var(--transition);
}

.skill-list li:last-child {
    border-bottom: none;
}

.skill-list li:hover {
    color: var(--color-text-primary);
    padding-left: var(--spacing-xs);
}

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

.process-step {
    text-align: center;
    padding: var(--spacing-md);
    background-color: var(--color-bg-secondary);
    border-radius: var(--border-radius);
    border: 1px solid var(--color-border);
    transition: var(--transition);
}

.process-step:hover {
    border-color: var(--color-accent);
    transform: translateY(-5px);
}

.step-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-accent);
    opacity: 0.6;
    margin-bottom: var(--spacing-sm);
}

.step-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-primary);
}

.step-description {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
}

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

.contact-intro {
    text-align: center;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
    font-size: 1.1rem;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-lg);
    max-width: 900px;
    margin: 0 auto;
}

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

.contact-item {
    background-color: var(--color-bg-tertiary);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    border: 1px solid var(--color-border);
}

.contact-label {
    display: block;
    color: var(--color-text-secondary);
    font-size: 0.85rem;
    margin-bottom: var(--spacing-xs);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.contact-link {
    color: var(--color-accent);
    text-decoration: none;
    font-size: 1.1rem;
    transition: var(--transition);
}

.contact-link:hover {
    opacity: 0.8;
}

.contact-text {
    color: var(--color-text-primary);
    font-size: 1.1rem;
}

/* Contact Form */
.contact-form {
    background-color: var(--color-bg-tertiary);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    border: 1px solid var(--color-border);
}

.form-group {
    margin-bottom: var(--spacing-sm);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text-secondary);
    font-size: 0.9rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    color: var(--color-text-primary);
    font-family: var(--font-primary);
    font-size: 1rem;
    transition: var(--transition);
}

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

.form-status {
    margin-top: var(--spacing-sm);
    text-align: center;
    font-size: 0.9rem;
}

.form-status.success {
    color: var(--color-success);
}

.form-status.error {
    color: #ef4444;
}

/* ===========================
   Footer
   =========================== */
.footer {
    background-color: var(--color-bg);
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-md) 0;
    text-align: center;
    color: var(--color-text-secondary);
    font-size: 0.9rem;
}

/* ===========================
   Responsive Design
   =========================== */
@media (max-width: 768px) {
    .nav-menu {
        gap: var(--spacing-sm);
    }
    
    .nav-link {
        font-size: 0.85rem;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .hero-description {
        font-size: 1rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .proof-content {
        grid-template-columns: 1fr;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .metrics-grid,
    .projects-grid,
    .skills-grid,
    .process-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero-cta {
        flex-direction: column;
        align-items: stretch;
    }
    
    .btn {
        width: 100%;
    }
    
    .nav-menu {
        flex-wrap: wrap;
        justify-content: center;
    }
}