/* ===== CSS Variables ===== */
:root {
    --color-bg: #0a0f1c;
    --color-bg-lighter: #111827;
    --color-bg-card: #1a2234;
    --color-primary: #f97316;
    --color-primary-light: #fb923c;
    --color-accent: #06b6d4;
    --color-text: #f8fafc;
    --color-text-muted: #94a3b8;
    --color-text-dim: #64748b;
    --color-border: #334155;
    
    --font-display: 'DM Serif Display', serif;
    --font-body: 'Manrope', sans-serif;
    
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 5rem;
    
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    --transition-fast: 150ms ease;
    --transition-normal: 300ms ease;
    --transition-slow: 500ms ease;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

a:hover {
    color: var(--color-primary-light);
}

h1, h2, h3 {
    font-family: var(--font-display);
    font-weight: 400;
    line-height: 1.2;
}

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

.section {
    padding: var(--spacing-2xl) 0;
}

/* ===== Navigation ===== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 15, 28, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    font-family: var(--font-display);
    font-size: 1.75rem;
    color: var(--color-text);
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.nav-links a {
    color: var(--color-text-muted);
    font-weight: 500;
    font-size: 0.9rem;
    letter-spacing: 0.02em;
    padding: var(--spacing-xs) 0;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: width var(--transition-normal);
}

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

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

/* ===== Hero Section ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding-top: 72px;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(ellipse 80% 50% at 50% -20%, rgba(249, 115, 22, 0.15), transparent),
        radial-gradient(ellipse 60% 40% at 80% 60%, rgba(6, 182, 212, 0.1), transparent);
    pointer-events: none;
}

.hero-content {
    flex: 1;
    max-width: 600px;
    padding: var(--spacing-2xl) var(--spacing-lg);
    animation: fadeInUp 0.8s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-label {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-xs) var(--spacing-sm);
    background: rgba(249, 115, 22, 0.1);
    border: 1px solid rgba(249, 115, 22, 0.3);
    border-radius: var(--radius-sm);
}

.hero h1 {
    font-size: clamp(3rem, 8vw, 5rem);
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--color-accent);
    font-weight: 500;
    margin-bottom: var(--spacing-md);
}

.hero-text {
    font-size: 1.1rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-xl);
    max-width: 480px;
}

.hero-decoration {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: var(--spacing-2xl);
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

.code-block {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    font-family: 'SF Mono', 'Fira Code', monospace;
    font-size: 0.9rem;
    line-height: 1.8;
    box-shadow: 
        0 4px 6px -1px rgba(0, 0, 0, 0.3),
        0 20px 50px -12px rgba(0, 0, 0, 0.5);
}

.code-line {
    display: block;
    padding-left: var(--spacing-md);
}

.code-keyword { color: #c792ea; }
.code-class { color: #ffcb6b; }
.code-method { color: #82aaff; }

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-lg);
    font-family: var(--font-body);
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary), #ea580c);
    color: white;
    box-shadow: 0 4px 14px rgba(249, 115, 22, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(249, 115, 22, 0.5);
    color: white;
}

.btn-full {
    width: 100%;
}

/* ===== Section Headers ===== */
.section h2 {
    font-size: clamp(2rem, 5vw, 3rem);
    margin-bottom: var(--spacing-xl);
}

/* ===== About Section ===== */
.about {
    background: var(--color-bg-lighter);
}

.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-xl);
    align-items: start;
}

.about-text .lead {
    font-size: 1.25rem;
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
    font-weight: 500;
}

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

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

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

.stat-number {
    display: block;
    font-family: var(--font-display);
    font-size: 2rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: 0.85rem;
    color: var(--color-text-dim);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

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

.skill-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: all var(--transition-normal);
}

.skill-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.skill-icon {
    width: 48px;
    height: 48px;
    color: var(--color-accent);
    margin-bottom: var(--spacing-md);
}

.skill-icon svg {
    width: 100%;
    height: 100%;
}

.skill-card h3 {
    font-family: var(--font-body);
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

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

/* ===== Company Section ===== */
.company {
    background: var(--color-bg-lighter);
}

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

.company-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
}

.company-card h3 {
    font-size: 1.75rem;
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
}

.company-card p {
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-md);
}

.company-details {
    display: flex;
    gap: var(--spacing-xl);
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
}

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

.detail-label {
    font-size: 0.8rem;
    color: var(--color-text-dim);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.detail-value {
    font-weight: 600;
    color: var(--color-text);
}

/* ===== Projects Section ===== */
.projects-intro {
    color: var(--color-text-muted);
    font-size: 1.1rem;
    margin-bottom: var(--spacing-xl);
    max-width: 600px;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.project-card {
    display: block;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    text-decoration: none;
    transition: all var(--transition-normal);
}

.project-card:hover {
    border-color: var(--color-accent);
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.project-icon {
    width: 48px;
    height: 48px;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.project-icon svg {
    width: 100%;
    height: 100%;
}

.project-card h3 {
    font-family: var(--font-body);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
}

.project-card p {
    font-size: 0.95rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

.project-link {
    display: inline-block;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-accent);
    transition: color var(--transition-fast);
}

.project-card:hover .project-link {
    color: var(--color-primary);
}

/* ===== Contact Section ===== */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: start;
}

.contact-info h3 {
    font-size: 1.75rem;
    margin-bottom: var(--spacing-md);
}

.contact-info > p {
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-lg);
}

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

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--color-text-muted);
}

.contact-item svg {
    width: 20px;
    height: 20px;
    color: var(--color-accent);
    flex-shrink: 0;
}

.contact-item a {
    color: var(--color-text);
}

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

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

.form-group label {
    display: block;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
}

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

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

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

/* ===== Footer ===== */
.footer {
    background: var(--color-bg-lighter);
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-lg) 0;
}

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

.footer-logo {
    font-family: var(--font-display);
    font-size: 1.5rem;
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

/* ===== Form Success Message ===== */
.form-success {
    background: rgba(6, 182, 212, 0.1);
    border: 1px solid var(--color-accent);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    text-align: center;
    color: var(--color-accent);
    display: none;
}

.form-success.show {
    display: block;
    animation: fadeInUp 0.3s ease-out;
}

/* ===== Responsive ===== */
@media (max-width: 968px) {
    .hero {
        flex-direction: column;
        text-align: center;
    }
    
    .hero-content {
        max-width: 100%;
    }
    
    .hero-text {
        max-width: 100%;
    }
    
    .hero-decoration {
        padding: var(--spacing-lg);
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .about-stats {
        flex-direction: row;
        flex-wrap: wrap;
    }
    
    .stat {
        flex: 1;
        min-width: 140px;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    .nav-links {
        display: none;
    }
    
    .code-block {
        font-size: 0.75rem;
        padding: var(--spacing-md);
    }
    
    .skills-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        flex-direction: column;
        gap: var(--spacing-sm);
        text-align: center;
    }
    
    .company-details {
        flex-direction: column;
        gap: var(--spacing-md);
    }
}