/* =========================================
   Branimir Kolarek — Personal Website
   Clean, typographic, content-first design
   ========================================= */

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

:root {
    --color-bg: #fafaf8;
    --color-bg-alt: #f2f1ed;
    --color-text: #1a1a1a;
    --color-text-secondary: #555;
    --color-accent: #2a2a2a;
    --color-link: #1a1a1a;
    --color-link-hover: #666;
    --color-border: #ddd;
    --color-card-bg: #fff;
    --color-card-hover: #f7f7f5;

    --font-serif: 'EB Garamond', Georgia, 'Times New Roman', serif;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    --max-width: 780px;
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 2rem;
    --space-lg: 4rem;
    --space-xl: 6rem;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    color: var(--color-text);
    background-color: var(--color-bg);
    line-height: 1.7;
    font-weight: 400;
    font-size: 1rem;
}

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

/* --- Links --- */
a {
    color: var(--color-link);
    text-decoration: none;
    border-bottom: 1px solid var(--color-border);
    transition: border-color 0.2s ease, color 0.2s ease;
}

a:hover {
    color: var(--color-link-hover);
    border-bottom-color: var(--color-link-hover);
}

/* --- Header --- */
#header {
    position: sticky;
    top: 0;
    z-index: 100;
    background-color: rgba(250, 250, 248, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
}

#header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 60px;
}

.site-name {
    font-family: var(--font-serif);
    font-size: 1.15rem;
    font-weight: 500;
    letter-spacing: 0.01em;
    color: var(--color-text);
    border-bottom: none;
}

.site-name:hover {
    color: var(--color-text);
    border-bottom: none;
}

#main-nav {
    display: flex;
    gap: var(--space-md);
}

#main-nav a {
    font-size: 0.85rem;
    font-weight: 400;
    letter-spacing: 0.03em;
    color: var(--color-text-secondary);
    border-bottom: none;
    transition: color 0.2s ease;
}

#main-nav a:hover {
    color: var(--color-text);
    border-bottom: none;
}

/* --- Sections --- */
.section {
    padding: var(--space-xl) 0;
}

.section-alt {
    background-color: var(--color-bg-alt);
}

/* --- Intro Section --- */
.section-intro {
    padding-top: var(--space-xl);
    padding-bottom: var(--space-lg);
}

.intro-layout {
    display: flex;
    align-items: flex-start;
    gap: var(--space-lg);
}

.intro-text {
    flex: 1;
    min-width: 0;
}

.intro-photo {
    flex-shrink: 0;
    padding-top: 0.3rem; /* align with top of h1 baseline */
}

#profile-photo {
    width: 130px;
    height: 130px;
    border-radius: 50%;
    object-fit: cover;
    display: block;
    filter: grayscale(15%);
    border: 1px solid var(--color-border);
}

h1 {
    font-family: var(--font-serif);
    font-size: 2.8rem;
    font-weight: 400;
    line-height: 1.15;
    letter-spacing: -0.01em;
    margin-bottom: var(--space-xs);
    color: var(--color-text);
}

.role {
    font-size: 1.05rem;
    color: var(--color-text-secondary);
    font-weight: 300;
    margin-bottom: var(--space-lg);
    letter-spacing: 0.01em;
}

.intro-body {
    max-width: 100%;
}

.intro-body p {
    margin-bottom: var(--space-sm);
    font-size: 1.02rem;
    line-height: 1.75;
    color: var(--color-text);
}

.intro-body p:last-of-type:not(.cv-line) {
    margin-bottom: var(--space-md);
}

.cv-line {
    margin-top: var(--space-md);
    font-size: 0.9rem;
    color: var(--color-text-secondary);
}

.cv-line a {
    font-weight: 500;
}

.sep {
    margin: 0 0.5em;
    color: var(--color-border);
}

/* --- Section headings --- */
h2 {
    font-family: var(--font-serif);
    font-size: 1.9rem;
    font-weight: 400;
    margin-bottom: var(--space-sm);
    color: var(--color-text);
    letter-spacing: -0.01em;
}

.section-lead {
    max-width: 640px;
    font-size: 1.02rem;
    line-height: 1.75;
    color: var(--color-text);
    margin-bottom: var(--space-lg);
}

/* --- Research --- */
.research-areas {
    display: grid;
    gap: var(--space-md);
}

.research-item {
    padding-bottom: var(--space-md);
    border-bottom: 1px solid var(--color-border);
}

.research-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.research-item h3 {
    font-family: var(--font-serif);
    font-size: 1.2rem;
    font-weight: 500;
    margin-bottom: var(--space-xs);
    color: var(--color-text);
}

.research-item p {
    font-size: 0.95rem;
    line-height: 1.7;
    color: var(--color-text-secondary);
    max-width: 600px;
}

/* --- Publications --- */
.publication-list {
    list-style: none;
    counter-reset: pub-counter;
}

.publication-list li {
    counter-increment: pub-counter;
    padding: var(--space-sm) 0;
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: baseline;
    gap: var(--space-sm);
}

.publication-list li:last-child {
    border-bottom: none;
}

.publication-list li::before {
    content: counter(pub-counter) ".";
    font-family: var(--font-serif);
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    flex-shrink: 0;
    min-width: 1.8em;
}

.pub-title {
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--color-text);
}

.pub-note {
    font-size: 0.8rem;
    color: var(--color-text-secondary);
    white-space: nowrap;
    flex-shrink: 0;
    margin-left: auto;
}

.section-footnote {
    margin-top: var(--space-md);
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

/* --- Teaching --- */
.teaching-list {
    display: grid;
    gap: var(--space-lg);
}

.teaching-item {
    padding-bottom: var(--space-lg);
    border-bottom: 1px solid var(--color-border);
}

.teaching-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.teaching-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: var(--space-md);
    margin-bottom: var(--space-sm);
}

.teaching-item h3 {
    font-family: var(--font-serif);
    font-size: 1.2rem;
    font-weight: 500;
    color: var(--color-text);
    margin-bottom: 0.2rem;
}

.teaching-meta {
    font-size: 0.8rem;
    color: var(--color-text-secondary);
    font-style: italic;
}

.teaching-tags {
    display: flex;
    gap: 0.4rem;
    flex-wrap: wrap;
    justify-content: flex-end;
    flex-shrink: 0;
}

.tag {
    display: inline-block;
    font-size: 0.72rem;
    padding: 0.2em 0.65em;
    border-radius: 3px;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    color: var(--color-text-secondary);
    white-space: nowrap;
    letter-spacing: 0.02em;
}

.section-alt .tag {
    background: var(--color-bg-alt);
}

.tag-mandatory {
    border-color: #bbb;
    color: var(--color-text);
    font-weight: 500;
}

.teaching-desc {
    font-size: 0.95rem;
    line-height: 1.7;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-sm);
    max-width: 640px;
}

.teaching-outcomes {
    font-size: 0.875rem;
    line-height: 1.7;
    color: var(--color-text-secondary);
    max-width: 640px;
}

/* --- Design Grid --- */
.design-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1px;
    background-color: var(--color-border);
    border: 1px solid var(--color-border);
    margin-bottom: var(--space-md);
}

.design-card {
    background: var(--color-card-bg);
    padding: var(--space-md) var(--space-sm);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-height: 120px;
    border-bottom: none;
    transition: background-color 0.2s ease;
}

.design-card:hover {
    background-color: var(--color-card-hover);
    border-bottom: none;
}

.card-title {
    font-size: 0.875rem;
    font-weight: 500;
    line-height: 1.45;
    color: var(--color-text);
}

.card-year {
    font-size: 0.8rem;
    color: var(--color-text-secondary);
    margin-top: var(--space-xs);
    font-variant-numeric: tabular-nums;
}

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

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm) var(--space-md);
    margin-bottom: var(--space-md);
}

.footer-links a {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    border-bottom: 1px solid transparent;
}

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

.footer-copy {
    font-size: 0.8rem;
    color: var(--color-text-secondary);
    opacity: 0.6;
}

/* --- Responsive --- */
@media screen and (max-width: 700px) {
    .intro-layout {
        flex-direction: column-reverse;
        gap: var(--space-md);
    }

    #profile-photo {
        width: 90px;
        height: 90px;
    }

    .teaching-header {
        flex-direction: column;
        gap: var(--space-xs);
    }

    .teaching-tags {
        justify-content: flex-start;
    }
}

@media screen and (max-width: 640px) {
    :root {
        --space-xl: 3.5rem;
        --space-lg: 2.5rem;
    }

    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.5rem;
    }

    #header .container {
        flex-direction: column;
        height: auto;
        padding-top: var(--space-sm);
        padding-bottom: var(--space-sm);
        align-items: flex-start;
        gap: var(--space-xs);
    }

    #main-nav {
        gap: var(--space-sm);
        flex-wrap: wrap;
    }

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

    .publication-list li {
        flex-direction: column;
        gap: 0.25rem;
    }

    .pub-note {
        margin-left: 1.8em;
    }
}

@media screen and (max-width: 420px) {
    .design-grid {
        grid-template-columns: 1fr;
    }
}