/* ================================================================
   Joe Lang — portfolio stylesheet
   Single-page layout: sticky nav, hero w/ stats, content sections,
   card grids for projects/awards, dark contact band.
   ================================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=JetBrains+Mono:wght@500&display=swap');

:root {
    --bg: #f7f8fa;
    --surface: #ffffff;
    --surface-alt: #eef1f6;
    --ink: #101828;
    --ink-soft: #4b5768;
    --ink-faint: #7c879a;
    --border: #e3e7ee;
    --accent: #2f5fe0;
    --accent-ink: #1c3fa8;
    --accent-soft: #e7edfc;
    --hero-bg: #0b1120;
    --hero-bg-alt: #131c33;
    --hero-ink: #eef1f8;
    --hero-ink-soft: #a7b2c6;
    --hero-border: rgba(255, 255, 255, 0.12);
    --radius-lg: 16px;
    --radius-md: 10px;
    --radius-sm: 6px;
    --shadow: 0 1px 2px rgba(16, 24, 40, 0.04), 0 1px 3px rgba(16, 24, 40, 0.06);
    --shadow-lg: 0 8px 24px rgba(16, 24, 40, 0.08);
    --max-width: 1120px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    margin: 0;
    background: var(--bg);
    color: var(--ink);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-ink); }

.wrap {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

.mono { font-family: 'JetBrains Mono', 'Consolas', monospace; }

/* ---------------------------- Nav ---------------------------- */

#site-nav {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(11, 17, 32, 0.92);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--hero-border);
}

#site-nav .wrap {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.nav-logo {
    color: var(--hero-ink);
    font-weight: 700;
    font-size: 1.05rem;
    letter-spacing: -0.01em;
}

.nav-links {
    display: none;
    align-items: center;
    gap: 1.6rem;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-links a {
    color: var(--hero-ink-soft);
    font-size: 0.92rem;
    font-weight: 500;
}

.nav-links a:hover, .nav-links a.active { color: var(--hero-ink); }
#mobile-nav a.active { color: var(--hero-ink); }

.nav-cta {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    background: var(--accent);
    color: #fff !important;
    padding: 0.5rem 0.95rem;
    border-radius: var(--radius-sm);
    font-size: 0.88rem;
    font-weight: 600;
}

.nav-cta:hover { background: var(--accent-ink); color: #fff !important; }

.nav-toggle {
    display: inline-flex;
    background: none;
    border: 1px solid var(--hero-border);
    border-radius: var(--radius-sm);
    color: var(--hero-ink);
    padding: 0.4rem 0.6rem;
    font-size: 0.85rem;
    cursor: pointer;
}

@media (min-width: 860px) {
    .nav-links { display: flex; }
    .nav-toggle { display: none; }
}

#mobile-nav {
    display: none;
    position: sticky;
    top: 64px;
    z-index: 49;
    background: var(--hero-bg-alt);
    border-bottom: 1px solid var(--hero-border);
}

#mobile-nav.open { display: block; }

#mobile-nav ul {
    list-style: none;
    margin: 0;
    padding: 0.75rem 1.5rem 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

#mobile-nav a {
    color: var(--hero-ink-soft);
    font-size: 0.95rem;
    font-weight: 500;
}

@media (min-width: 860px) {
    #mobile-nav { display: none !important; }
}

/* ---------------------------- Hero ---------------------------- */

#hero {
    background: linear-gradient(160deg, var(--hero-bg) 0%, var(--hero-bg-alt) 100%);
    color: var(--hero-ink);
    padding: 4.5rem 0 3.5rem;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2.5rem;
    align-items: center;
}

@media (min-width: 780px) {
    .hero-grid { grid-template-columns: 1.3fr 0.7fr; }
}

.hero-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--hero-ink-soft);
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    margin-bottom: 1rem;
}

.hero h1 {
    font-size: clamp(2.2rem, 5vw, 3.4rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    margin: 0 0 0.5rem;
}

.hero-role {
    font-size: clamp(1.05rem, 2vw, 1.3rem);
    color: var(--hero-ink-soft);
    font-weight: 500;
    margin: 0 0 1.2rem;
}

.hero-blurb {
    color: var(--hero-ink-soft);
    max-width: 46ch;
    margin: 0 0 1.6rem;
    font-size: 1rem;
}

.hero-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
    margin-bottom: 1.8rem;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid var(--hero-border);
    color: var(--hero-ink-soft);
    padding: 0.35rem 0.75rem;
    border-radius: 999px;
    font-size: 0.82rem;
}

.dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: #3ddc84;
    display: inline-block;
}

.hero-ctas {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.65rem 1.2rem;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.92rem;
    border: 1px solid transparent;
    cursor: pointer;
}

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

.btn-ghost {
    background: transparent;
    color: var(--hero-ink);
    border-color: var(--hero-border);
}
.btn-ghost:hover { background: rgba(255, 255, 255, 0.08); color: var(--hero-ink); }

.hero-portrait {
    justify-self: center;
}

.hero-portrait img {
    width: 190px;
    height: 190px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid rgba(255, 255, 255, 0.15);
    margin: 0 auto;
}

.stats-row {
    margin-top: 3rem;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    border-top: 1px solid var(--hero-border);
    padding-top: 2rem;
}

.stat .stat-num {
    font-size: clamp(1.6rem, 3vw, 2.1rem);
    font-weight: 800;
    color: var(--hero-ink);
}

.stat .stat-label {
    font-size: 0.85rem;
    color: var(--hero-ink-soft);
}

/* ---------------------------- Sections ---------------------------- */

section.content { padding: 4rem 0; }
section.content.alt { background: var(--surface-alt); }

.section-head {
    max-width: 60ch;
    margin-bottom: 2.5rem;
}

.eyebrow {
    display: block;
    color: var(--accent);
    font-weight: 700;
    font-size: 0.8rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    margin-bottom: 0.5rem;
}

.section-head h2 {
    font-size: clamp(1.6rem, 3vw, 2.1rem);
    font-weight: 800;
    letter-spacing: -0.01em;
    margin: 0 0 0.6rem;
    color: var(--ink);
}

.section-head p {
    color: var(--ink-soft);
    margin: 0;
}

.subsection-title {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--ink);
    margin: 2.5rem 0 1.2rem;
}

.subsection-title:first-child { margin-top: 0; }

/* ---------------------------- About ---------------------------- */

.about-grid {
    display: grid;
    gap: 2rem;
    grid-template-columns: 1fr;
}

@media (min-width: 780px) {
    .about-grid { grid-template-columns: 1.5fr 1fr; }
}

.about-text p { color: var(--ink-soft); margin: 0 0 1rem; }

.edu-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 1.4rem 1.5rem;
    box-shadow: var(--shadow);
}

.edu-card h3 {
    margin: 0 0 0.3rem;
    font-size: 1rem;
    font-weight: 700;
}

.edu-card p {
    margin: 0.15rem 0;
    color: var(--ink-soft);
    font-size: 0.92rem;
}

/* ---------------------------- Skills ---------------------------- */

.skills-grid {
    display: grid;
    gap: 1.25rem;
    grid-template-columns: 1fr;
}

@media (min-width: 700px) {
    .skills-grid { grid-template-columns: repeat(3, 1fr); }
}

.skill-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    box-shadow: var(--shadow);
}

.skill-card h3 {
    margin: 0 0 1rem;
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--ink);
}

.chip-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.chip {
    background: var(--accent-soft);
    color: var(--accent-ink);
    font-size: 0.82rem;
    font-weight: 600;
    padding: 0.3rem 0.7rem;
    border-radius: 999px;
}

/* ---------------------------- Experience timeline ---------------------------- */

.timeline { position: relative; }

.timeline-item {
    position: relative;
    padding: 0 0 2.2rem 1.75rem;
    border-left: 2px solid var(--border);
}

.timeline-item:last-child { border-left-color: transparent; padding-bottom: 0; }

.timeline-item::before {
    content: '';
    position: absolute;
    left: -6px;
    top: 0.35rem;
    width: 11px;
    height: 11px;
    border-radius: 50%;
    background: var(--accent);
    border: 2px solid var(--surface);
}

.timeline-role {
    font-size: 1.1rem;
    font-weight: 700;
    margin: 0 0 0.1rem;
}

.timeline-meta {
    color: var(--ink-faint);
    font-size: 0.88rem;
    margin: 0 0 0.7rem;
}

.timeline-meta a { color: var(--ink-faint); text-decoration: underline; }
.timeline-meta a:hover { color: var(--accent); }

.timeline-summary { color: var(--ink-soft); margin: 0 0 0.7rem; }

.timeline-item ul {
    margin: 0;
    padding-left: 1.2rem;
    color: var(--ink-soft);
}

.timeline-item li { margin-bottom: 0.35rem; }

/* ---------------------------- Project / award cards ---------------------------- */

.card-grid {
    display: grid;
    gap: 1.5rem;
    grid-template-columns: 1fr;
    margin-bottom: 1rem;
}

@media (min-width: 640px) {
    .card-grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 900px) {
    .card-grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
}

.proj-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
}

.proj-card .thumb {
    aspect-ratio: 16 / 9;
    background: var(--surface-alt);
    overflow: hidden;
}

.proj-card .thumb img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    padding: 0.5rem;
}

.proj-body { padding: 1.1rem 1.25rem 1.3rem; flex: 1; display: flex; flex-direction: column; }

.proj-body h3 {
    margin: 0 0 0.5rem;
    font-size: 1.02rem;
    font-weight: 700;
}

.proj-body p {
    color: var(--ink-soft);
    font-size: 0.92rem;
    margin: 0 0 0.6rem;
}

.proj-link {
    margin-top: auto;
    font-size: 0.88rem;
    font-weight: 600;
}

/* Case-study cards (Plugins section) */

.case-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow);
    overflow: hidden;
    margin-bottom: 1.5rem;
}

.case-card .thumb {
    aspect-ratio: 21 / 9;
    background: var(--surface-alt);
}

.case-card .thumb img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    padding: 0.75rem;
}

.case-body { padding: 1.4rem 1.6rem; }

.case-body h3 { margin: 0 0 0.9rem; font-size: 1.08rem; font-weight: 700; }

.case-block { margin-bottom: 0.85rem; }
.case-block:last-child { margin-bottom: 0; }

.case-label {
    display: block;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 0.2rem;
}

.case-block p { margin: 0; color: var(--ink-soft); font-size: 0.93rem; }

.case-block ul {
    margin: 0.3rem 0 0;
    padding-left: 1.1rem;
    color: var(--ink-soft);
    font-size: 0.93rem;
}

.case-block li { margin-bottom: 0.3rem; }

/* Awards */

.award-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 0.6rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 1.3rem 1rem;
    box-shadow: var(--shadow);
}

.award-card img { max-height: 90px; width: auto; margin: 0 auto; }

.award-card figcaption { font-size: 0.85rem; color: var(--ink-soft); }

/* ---------------------------- Contact ---------------------------- */

#contact {
    background: linear-gradient(160deg, var(--hero-bg) 0%, var(--hero-bg-alt) 100%);
    color: var(--hero-ink);
    padding: 4rem 0;
    text-align: center;
}

#contact h2 {
    font-size: clamp(1.6rem, 3vw, 2.2rem);
    font-weight: 800;
    margin: 0 0 0.7rem;
}

#contact p {
    color: var(--hero-ink-soft);
    max-width: 46ch;
    margin: 0 auto 1.8rem;
}

.contact-ctas {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.75rem;
}

footer {
    padding: 1.75rem 0;
    text-align: center;
    color: var(--ink-faint);
    font-size: 0.82rem;
    background: var(--hero-bg);
}