/* ============================================
   DESIGN TOKENS
   ============================================ */
:root {
    /* Typography */
    --font-display: 'Newsreader', Georgia, serif;
    --font-body: 'Source Sans 3', -apple-system, sans-serif;

    /* Colors — muted editorial palette */
    --color-bg: #fafaf8;
    --color-surface: #ffffff;
    --color-text: #1a1a1a;
    --color-text-secondary: #6b6b6b;
    --color-text-tertiary: #999999;
    --color-accent: #2a2a2a;
    --color-border: #e5e5e3;
    --color-card-hover: #f5f5f3;
    --color-placeholder-bg: #f0efed;

    /* Spacing */
    --section-gap: 100px;
    --content-width: 720px;
    --wide-width: 960px;
}

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

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

body {
    font-family: var(--font-body);
    font-size: 1.05rem;
    line-height: 1.7;
    color: var(--color-text);
    background-color: var(--color-bg);
}

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

/* ============================================
   NAVIGATION
   ============================================ */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(250, 250, 248, 0.9);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
}

.nav-inner {
    max-width: var(--wide-width);
    margin: 0 auto;
    padding: 16px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 500;
    letter-spacing: -0.01em;
}

.nav-links {
    display: flex;
    gap: 32px;
}

.nav-links a {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    transition: color 0.2s ease;
}

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

/* ============================================
   SHARED: SECTION LABEL
   ============================================ */
.section-label {
    font-family: var(--font-body);
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-tertiary);
    margin-bottom: 40px;
}

/* ============================================
   HERO
   ============================================ */
.hero {
    max-width: var(--content-width);
    margin: 0 auto;
    padding: 160px 24px var(--section-gap);
}

.hero-label {
    font-family: var(--font-body);
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-tertiary);
    margin-bottom: 20px;
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(2.8rem, 6vw, 4rem);
    font-weight: 600;
    line-height: 1.1;
    letter-spacing: -0.025em;
    color: var(--color-text);
    margin-bottom: 32px;
}

.hero-bio {
    font-family: var(--font-display);
    font-size: 1.25rem;
    line-height: 1.75;
    color: var(--color-text-secondary);
    max-width: 600px;
}

/* ============================================
   CV SECTIONS (Education, Experience, Awards, Skills)
   ============================================ */
.cv-section {
    border-top: 1px solid var(--color-border);
    padding: var(--section-gap) 24px;
}

.cv-section-inner {
    max-width: var(--content-width);
    margin: 0 auto;
}

/* --- Individual CV entry --- */
.cv-entry {
    margin-bottom: 48px;
}

.cv-entry:last-child {
    margin-bottom: 0;
}

.cv-entry-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 6px;
}

.cv-entry-title {
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 500;
    line-height: 1.35;
    color: var(--color-text);
}

.cv-entry-date {
    font-size: 0.85rem;
    color: var(--color-text-tertiary);
    white-space: nowrap;
    flex-shrink: 0;
}

.cv-entry-subtitle {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    margin-bottom: 14px;
    line-height: 1.55;
}

.cv-entry-detail {
    font-size: 0.98rem;
    color: var(--color-text-secondary);
    line-height: 1.65;
}

/* --- Bullet lists inside CV entries --- */
.cv-list {
    list-style: none;
    padding: 0;
}

.cv-list li {
    position: relative;
    padding-left: 18px;
    font-size: 0.98rem;
    color: var(--color-text-secondary);
    line-height: 1.65;
    margin-bottom: 10px;
}

.cv-list li:last-child {
    margin-bottom: 0;
}

/* Subtle dash instead of default bullet */
.cv-list li::before {
    content: '–';
    position: absolute;
    left: 0;
    color: var(--color-text-tertiary);
}

/* --- Skills grid --- */
.skills-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.skill-group-title {
    font-family: var(--font-display);
    font-size: 1.05rem;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--color-text);
}

.skill-group-detail {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* ============================================
   PROJECTS
   ============================================ */
.projects {
    max-width: var(--wide-width);
    margin: 0 auto;
    padding: 0 24px var(--section-gap);
}

.project-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1px;
    background: var(--color-border);
    border: 1px solid var(--color-border);
}

/* --- Active project card (clickable) --- */
.project-card {
    display: block;
    background: var(--color-surface);
    padding: 40px;
    transition: background-color 0.2s ease;
}

a.project-card:hover {
    background-color: var(--color-card-hover);
}

.project-number {
    font-family: var(--font-display);
    font-size: 0.9rem;
    color: var(--color-text-tertiary);
    display: block;
    margin-bottom: 12px;
}

.project-title {
    font-family: var(--font-display);
    font-size: 1.6rem;
    font-weight: 500;
    line-height: 1.3;
    letter-spacing: -0.015em;
    margin-bottom: 12px;
}

.project-desc {
    font-size: 1rem;
    color: var(--color-text-secondary);
    line-height: 1.65;
    max-width: 540px;
    margin-bottom: 16px;
}

.project-tags {
    display: block;
    font-size: 0.8rem;
    color: var(--color-text-tertiary);
    letter-spacing: 0.02em;
    margin-bottom: 20px;
}

.project-cta {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-text);
    transition: opacity 0.2s ease;
}

a.project-card:hover .project-cta {
    opacity: 0.7;
}

/* --- Placeholder cards (not clickable) --- */
.project-card--placeholder {
    background: var(--color-placeholder-bg);
    cursor: default;
}

.project-card--placeholder .project-title {
    color: var(--color-text-tertiary);
}

.project-card--placeholder .project-desc {
    color: var(--color-text-tertiary);
    font-style: italic;
}

/* ============================================
   CONTACT
   ============================================ */
.contact {
    border-top: 1px solid var(--color-border);
    max-width: var(--content-width);
    margin: 0 auto;
    padding: var(--section-gap) 24px;
}

.contact-links {
    display: flex;
    gap: 40px;
}

.contact-link {
    font-family: var(--font-display);
    font-size: 1.3rem;
    font-weight: 500;
    color: var(--color-text);
    transition: opacity 0.2s ease;
}

.contact-link:hover {
    opacity: 0.6;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    border-top: 1px solid var(--color-border);
    padding: 40px 24px;
    text-align: center;
}

.footer p {
    font-size: 0.85rem;
    color: var(--color-text-tertiary);
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 640px) {
    :root {
        --section-gap: 72px;
    }

    .hero {
        padding-top: 120px;
    }

    .hero-bio {
        font-size: 1.1rem;
    }

    .cv-entry-header {
        flex-direction: column;
        gap: 2px;
    }

    .skills-grid {
        grid-template-columns: 1fr;
        gap: 28px;
    }

    .project-card {
        padding: 28px 20px;
    }

    .project-title {
        font-size: 1.3rem;
    }

    .contact-links {
        flex-direction: column;
        gap: 20px;
    }
}