/*
 * Colby Voss Portfolio
 * Minimal, modern, engineer aesthetic
 */

/* ===== CSS Custom Properties ===== */
:root {
    /* Colors */
    --color-bg: #0a0a0b;
    --color-bg-elevated: #111113;
    --color-bg-card: #16161a;
    --color-border: #2a2a2e;
    --color-border-hover: #3a3a3e;

    --color-text: #e4e4e7;
    --color-text-muted: #a1a1aa;
    --color-text-subtle: #71717a;

    --color-accent: #3b82f6;
    --color-accent-hover: #60a5fa;
    --color-accent-subtle: rgba(59, 130, 246, 0.1);

    --color-success: #22c55e;
    --color-warning: #f59e0b;

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;

    /* Layout */
    --max-width: 1200px;
    --border-radius: 8px;
    --border-radius-lg: 12px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
}

/* ===== Layout ===== */
.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

/* ===== Navigation ===== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(10, 10, 11, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
}

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

.nav-logo {
    font-family: var(--font-mono);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text);
    letter-spacing: -0.02em;
}

.nav-links {
    display: flex;
    gap: var(--space-xl);
}

.nav-links a {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-muted);
    transition: color var(--transition-fast);
}

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

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

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

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

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

.btn-secondary:hover {
    border-color: var(--color-border-hover);
    background: var(--color-bg-elevated);
}

/* ===== Section Styles ===== */
.section-title {
    font-size: 1.75rem;
    font-weight: 600;
    margin-bottom: var(--space-sm);
    letter-spacing: -0.02em;
}

.section-subtitle {
    color: var(--color-text-muted);
    margin-bottom: var(--space-2xl);
}

/* ===== Hero Section ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: var(--space-4xl) 0;
    padding-top: calc(var(--space-4xl) + 60px);
}

.hero-label {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--color-accent);
    margin-bottom: var(--space-md);
    letter-spacing: 0.05em;
}

.hero-title {
    font-size: clamp(2.5rem, 8vw, 4.5rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.1;
    margin-bottom: var(--space-lg);
}

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--color-text-muted);
    max-width: 600px;
    line-height: 1.7;
    margin-bottom: var(--space-2xl);
}

.hero-stats {
    display: flex;
    gap: var(--space-2xl);
    margin-bottom: var(--space-2xl);
    padding: var(--space-lg) 0;
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.stat {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.stat-value {
    font-family: var(--font-mono);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text);
}

.stat-label {
    font-size: 0.75rem;
    color: var(--color-text-subtle);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.hero-cta {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
}

/* ===== Projects Section ===== */
.projects {
    padding: var(--space-4xl) 0;
    background: var(--color-bg-elevated);
}

.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: var(--space-lg);
}

.project-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: var(--space-xl);
    transition: all var(--transition-base);
    display: flex;
    flex-direction: column;
}

.project-card:hover {
    border-color: var(--color-border-hover);
    transform: translateY(-2px);
}

.project-card-placeholder {
    border-style: dashed;
    opacity: 0.6;
}

.project-card-placeholder:hover {
    transform: none;
}

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-md);
}

.project-type {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-text-subtle);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.project-status {
    font-size: 0.75rem;
    font-weight: 500;
    padding: var(--space-xs) var(--space-sm);
    border-radius: 4px;
}

.status-complete {
    background: rgba(34, 197, 94, 0.1);
    color: var(--color-success);
}

.status-progress {
    background: rgba(245, 158, 11, 0.1);
    color: var(--color-warning);
}

.project-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--space-sm);
    letter-spacing: -0.01em;
}

.project-description {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    line-height: 1.7;
    margin-bottom: var(--space-lg);
    flex-grow: 1;
}

.project-stack {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
}

.tag {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    padding: var(--space-xs) var(--space-sm);
    background: var(--color-accent-subtle);
    color: var(--color-accent);
    border-radius: 4px;
}

.project-link {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-muted);
    transition: color var(--transition-fast);
}

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

/* ===== Skills Section ===== */
.skills {
    padding: var(--space-4xl) 0;
}

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

.skill-category {
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: var(--space-xl);
}

.skill-category-title {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-sm);
    border-bottom: 1px solid var(--color-border);
}

.skill-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.skill-list li {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    padding-left: var(--space-md);
    position: relative;
}

.skill-list li::before {
    content: '›';
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-weight: 600;
}

/* ===== About / Beyond Work Section ===== */
.about {
    padding: var(--space-4xl) 0;
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-xl);
}

.about-card {
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    transition: all var(--transition-base);
}

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

.about-image {
    width: 100%;
    overflow: hidden;
    background: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-lg);
}

.about-image img {
    width: 100%;
    height: auto;
    object-fit: contain;
    transition: transform var(--transition-base);
}

.about-card:hover .about-image img {
    transform: scale(1.03);
}

.about-content {
    padding: var(--space-lg);
}

.about-content h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--space-sm);
    color: var(--color-text);
}

.about-content p {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    line-height: 1.6;
}

/* ===== Resume Section ===== */
.resume {
    padding: var(--space-4xl) 0;
    background: var(--color-bg-elevated);
}

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

.resume-summary {
    font-size: 1.125rem;
    color: var(--color-text-muted);
    line-height: 1.8;
    margin-bottom: var(--space-2xl);
}

.experience-timeline {
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
    margin-bottom: var(--space-2xl);
}

.experience-item {
    display: grid;
    grid-template-columns: 100px 1fr;
    gap: var(--space-lg);
    padding: var(--space-lg);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
}

.experience-period {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.experience-details h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--space-sm);
}

.experience-details p {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    line-height: 1.7;
}

.resume-cta {
    padding-top: var(--space-lg);
    border-top: 1px solid var(--color-border);
}

/* ===== Contact Section ===== */
.contact {
    padding: var(--space-4xl) 0;
}

.contact-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-lg);
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    padding: var(--space-xl);
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    transition: all var(--transition-base);
}

.contact-item:hover {
    border-color: var(--color-accent);
    background: var(--color-bg-card);
}

.contact-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background: var(--color-accent-subtle);
    color: var(--color-accent);
    border-radius: var(--border-radius);
    font-family: var(--font-mono);
    font-weight: 600;
    font-size: 1rem;
    flex-shrink: 0;
}

.contact-label {
    font-size: 0.75rem;
    color: var(--color-text-subtle);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    display: block;
    margin-bottom: var(--space-xs);
}

.contact-value {
    font-size: 0.875rem;
    color: var(--color-text);
}

/* ===== Footer ===== */
.footer {
    padding: var(--space-xl) 0;
    border-top: 1px solid var(--color-border);
    text-align: center;
}

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

/* ===== Responsive Design ===== */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .hero {
        padding-top: calc(var(--space-3xl) + 60px);
    }

    .hero-stats {
        flex-direction: column;
        gap: var(--space-lg);
    }

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

    .hero-cta .btn {
        width: 100%;
    }

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

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

    .experience-item {
        grid-template-columns: 1fr;
        gap: var(--space-sm);
    }

    .contact-item {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-md);
    }

    .section-title {
        font-size: 1.5rem;
    }

    .hero-title {
        font-size: 2rem;
    }

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

/* ===== Animations ===== */
@media (prefers-reduced-motion: no-preference) {
    .project-card,
    .skill-category,
    .contact-item,
    .experience-item,
    .about-card {
        animation: fadeInUp 0.5s ease-out;
    }

    @keyframes fadeInUp {
        from {
            opacity: 0;
            transform: translateY(20px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }
}

/* ===== Selection ===== */
::selection {
    background: var(--color-accent);
    color: white;
}

/* ===== Scrollbar ===== */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg);
}

::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-border-hover);
}