/* ===== Variables ===== */
:root {
    --color-bg: #0a0a0a;
    --color-bg-alt: #111111;
    --color-surface: #1a1a1a;
    --color-border: #2a2a2a;
    --color-text: #ffffff;
    --color-text-muted: #888888;
    --color-accent: #3b82f6;
    --color-accent-hover: #2563eb;
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --max-width: 1100px;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 5rem;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
}

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

html {
    scroll-behavior: smooth;
}

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

a {
    color: inherit;
    text-decoration: none;
}

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

/* ===== Navigation ===== */
.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-lg);
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
}

.nav-logo {
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--color-text);
}

.nav-cta {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-muted);
    transition: color 0.2s ease;
}

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

/* ===== Hero ===== */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-alt) 100%);
}

.hero-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-md);
}

.hero h1 {
    font-size: clamp(2.5rem, 8vw, 4rem);
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: clamp(1.25rem, 4vw, 1.5rem);
    font-weight: 500;
    color: var(--color-accent);
    margin-bottom: var(--spacing-sm);
}

.hero-tagline {
    font-size: 1rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-xl);
}

.hero-cta {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    align-items: center;
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.875rem 1.75rem;
    font-size: 1rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    transition: all 0.2s ease;
    cursor: pointer;
    border: none;
}

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

.btn-primary:hover {
    background-color: var(--color-accent-hover);
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-text-muted);
    border: 1px solid var(--color-border);
}

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

.btn-large {
    padding: 1rem 2.5rem;
    font-size: 1.125rem;
}

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

.section h2 {
    font-size: clamp(1.75rem, 5vw, 2.25rem);
    font-weight: 700;
    margin-bottom: var(--spacing-xl);
    text-align: center;
    letter-spacing: -0.02em;
}

/* ===== Experience ===== */
.experience {
    background-color: var(--color-bg-alt);
}

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

.experience-card {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background-color: var(--color-surface);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
}

.experience-logo {
    flex-shrink: 0;
}

.logo-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background-color: var(--color-accent);
    color: var(--color-text);
    font-weight: 700;
    font-size: 1.25rem;
    border-radius: var(--radius-sm);
}

.experience-content h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.experience-role {
    font-size: 0.875rem;
    color: var(--color-accent);
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
}

.experience-desc {
    font-size: 0.9375rem;
    color: var(--color-text-muted);
    line-height: 1.7;
}

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

.service-card {
    padding: var(--spacing-lg);
    background-color: var(--color-surface);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    transition: border-color 0.2s ease, transform 0.2s ease;
}

.service-card:hover {
    border-color: var(--color-accent);
    transform: translateY(-4px);
}

.service-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    background-color: rgba(59, 130, 246, 0.1);
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-md);
    color: var(--color-accent);
}

.service-card h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.service-card p {
    font-size: 0.9375rem;
    color: var(--color-text-muted);
    line-height: 1.7;
}

/* ===== Stack ===== */
.stack {
    background-color: var(--color-bg-alt);
}

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

.tag {
    padding: 0.5rem 1rem;
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-muted);
    transition: all 0.2s ease;
}

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

/* ===== CTA ===== */
.cta {
    text-align: center;
}

.cta p {
    font-size: 1.125rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-lg);
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

.cta-buttons {
    margin-bottom: var(--spacing-lg);
}

.cta-location {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

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

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

.footer p {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

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

.footer-links a {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    transition: color 0.2s ease;
}

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

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .hero-cta {
        width: 100%;
        padding: 0 var(--spacing-sm);
    }

    .btn {
        width: 100%;
    }

    .experience-card {
        flex-direction: column;
    }

    .footer .container {
        flex-direction: column;
        gap: var(--spacing-sm);
        text-align: center;
    }
}

@media (min-width: 769px) {
    .hero-cta {
        flex-direction: row;
    }
}