/* ==========================================================================
   Swiss Minimal + Bold Typography
   Florian P. Mahner - Academic Website
   ========================================================================== */

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

/* Custom Properties */
:root {
  /* Colors */
  --black: #000;
  --white: #fff;
  --accent: #E63946;
  --grey-dark: #555;
  --grey-mid: #999;
  --grey-rule: #d0d0d0;

  /* Typography */
  --font: 'Inter', -apple-system, Helvetica Neue, Arial, sans-serif;
  --fs-display: clamp(3.5rem, 10vw, 7.5rem);
  --fs-lead: clamp(1.25rem, 2.5vw, 1.75rem);
  --fs-body: 1rem;
  --fs-caption: 0.8125rem;
  --fs-micro: 0.6875rem;

  --fw-light: 300;
  --fw-regular: 400;
  --fw-medium: 500;
  --fw-semibold: 600;
  --fw-bold: 700;
  --fw-extrabold: 800;
  --fw-black: 900;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 2.5rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;

  /* Layout */
  --page-pad-x: clamp(1.5rem, 5vw, 6rem);
  --measure: 640px;
  --measure-narrow: 360px;

  /* Rules */
  --rule: 1px solid var(--black);
  --rule-light: 1px solid var(--grey-rule);
}

/* Base */
html { font-size: 16px; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; scroll-behavior: smooth; }
body { font-family: var(--font); font-weight: var(--fw-regular); color: var(--black); background: var(--white); line-height: 1.55; }
::selection { background: var(--accent); color: var(--white); }
a { color: inherit; text-decoration: none; }

/* Page Container & Grid Lines */
.page { max-width: 1200px; margin: 0 auto; padding: 0 var(--page-pad-x); border-left: var(--rule); border-right: var(--rule-light); min-height: 100vh; position: relative; overflow-x: clip; }
.page::before, .page::after { content: ''; position: absolute; top: 0; bottom: 0; width: 0; border-left: var(--rule-light); pointer-events: none; z-index: 0; }
.page::before { left: 33.333%; }
.page::after { left: 66.666%; }
section, header, footer { position: relative; z-index: 1; }

/* Navigation */
.nav { border-bottom: var(--rule); padding: 1.25rem 0; display: flex; align-items: baseline; gap: var(--space-xl); flex-wrap: wrap; position: sticky; top: 0; background: var(--white); z-index: 100; }
.nav-logo { font-weight: var(--fw-bold); font-size: var(--fs-caption); letter-spacing: 0.08em; text-transform: uppercase; margin-inline-end: auto; }
.nav-links { display: flex; gap: 1.75rem; list-style: none; }
.nav-links a { font-size: var(--fs-caption); font-weight: var(--fw-regular); letter-spacing: 0.04em; text-transform: uppercase; position: relative; font-variation-settings: 'wght' 400; transition: font-variation-settings 0.15s; }
.nav-links a:hover { font-variation-settings: 'wght' 700; }
.nav-links a.active { font-variation-settings: 'wght' 700; }
.nav-links a.active::after { content: ''; display: block; position: absolute; bottom: -4px; left: 0; width: 100%; height: 2px; background: var(--accent); }

/* Hero */
.hero { padding: var(--space-4xl) 0 var(--space-3xl); border-bottom: var(--rule); }
.hero-name { font-size: var(--fs-display); font-weight: var(--fw-black); line-height: 0.92; letter-spacing: -0.035em; max-width: 90%; }
.hero-name .accent-dot { color: var(--accent); }
.hero-role { margin-top: var(--space-2xl); font-weight: var(--fw-light); font-size: var(--fs-body); letter-spacing: 0.04em; color: var(--grey-mid); }
.hero-rule { display: block; width: 60px; height: 3px; background: var(--accent); margin-top: var(--space-2xl); border: none; }

/* Affiliations */
.affiliations { margin-top: var(--space-2xl); display: flex; gap: var(--space-xl); flex-wrap: wrap; }
.affiliation { border-inline-start: 2px solid var(--black); padding-inline-start: var(--space-md); }
.affiliation-name { font-weight: var(--fw-semibold); font-size: var(--fs-body); }
.affiliation-role { font-weight: var(--fw-light); font-size: var(--fs-caption); color: var(--grey-mid); }

/* Section */
.section { padding: var(--space-3xl) 0; border-bottom: var(--rule); }

.section-label {
  font-size: var(--fs-micro); font-weight: var(--fw-semibold); letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--grey-mid); margin-bottom: var(--space-2xl);
  display: flex; align-items: center; gap: var(--space-md);
}
.section-label::after { content: ''; flex: 1; height: 0; border-top: var(--rule-light); }
.section-number { font-weight: var(--fw-light); font-size: var(--fs-micro); color: var(--grey-mid); margin-inline-end: var(--space-xs); font-variant-numeric: tabular-nums; }

/* About */
.about-text { font-size: var(--fs-lead); font-weight: var(--fw-light); line-height: 1.5; max-width: 720px; letter-spacing: -0.01em; }
.about-text strong { font-weight: var(--fw-bold); }
.about-text em { font-style: normal; color: var(--accent); font-weight: var(--fw-medium); }
.about-detail { margin-top: var(--space-lg); font-size: var(--fs-body); font-weight: var(--fw-light); line-height: 1.65; color: var(--grey-dark); max-width: var(--measure); }
.about-detail a { color: var(--accent); }
.about-detail a:hover { text-decoration: underline; }

/* Background */
.edu-item {
  display: grid;
  grid-template-columns: 5.5rem 1fr;
  gap: 0 var(--space-xl);
  padding: 0.75rem 0;
  align-items: baseline;
}
.edu-item:first-child { padding-top: 0; }

.edu-year {
  font-weight: var(--fw-light);
  font-size: var(--fs-caption);
  color: var(--grey-mid);
  font-variant-numeric: tabular-nums;
}

.edu-content { display: flex; flex-direction: column; gap: 0.15rem; }
.edu-content strong { font-weight: var(--fw-semibold); font-size: var(--fs-body); }
.edu-place { font-size: var(--fs-caption); color: var(--grey-mid); }
.edu-place a { color: inherit; }
.edu-place a:hover { color: var(--accent); }
.edu-detail { font-size: var(--fs-caption); color: var(--grey-mid); font-weight: var(--fw-light); }

/* Publications */
.pub-row {
  display: grid;
  grid-template-columns: 4.5rem 1fr;
  gap: 0 var(--space-xl);
  padding: var(--space-lg) 0;
  border-top: var(--rule-light);
  align-items: start;
}
.pub-row:first-child { border-top: none; }

.pub-col-year {
  font-weight: var(--fw-light);
  font-size: var(--fs-caption);
  color: var(--grey-mid);
  padding-top: 0.15rem;
  font-variant-numeric: tabular-nums;
}

.pub-col-main { max-width: var(--measure); }

.pub-title {
  font-weight: var(--fw-semibold);
  font-size: var(--fs-body);
  line-height: 1.4;
  letter-spacing: -0.01em;
}
.pub-title a:hover { color: var(--accent); }

.pub-venue {
  font-weight: var(--fw-extrabold);
  font-size: var(--fs-caption);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-top: 0.4rem;
}

.pub-authors {
  font-weight: var(--fw-light);
  font-size: var(--fs-caption);
  color: var(--grey-mid);
  margin-top: var(--space-xs);
  line-height: 1.45;
}
.pub-authors .self { font-weight: var(--fw-semibold); color: var(--black); }

.pub-links {
  display: flex;
  gap: 0.625rem;
  margin-top: 0.4rem;
}
.pub-links a {
  font-size: var(--fs-caption);
  font-weight: var(--fw-medium);
  color: var(--grey-mid);
  transition: color 0.15s;
}
.pub-links a:hover { color: var(--accent); }

/* Open Source */
.oss-row {
  display: grid;
  grid-template-columns: 10rem 1fr;
  gap: 0 var(--space-xl);
  padding: var(--space-md) 0;
  align-items: start;
}
.oss-row:first-child { padding-top: 0; }

.oss-col-left { min-width: 0; }
.oss-col-right { min-width: 0; }

.oss-name {
  font-weight: var(--fw-bold);
  font-size: var(--fs-body);
  letter-spacing: -0.01em;
}
.oss-name a:hover { color: var(--accent); }

.oss-meta {
  font-size: var(--fs-caption);
  font-weight: var(--fw-regular);
  color: var(--grey-mid);
  margin-top: var(--space-xs);
}

.oss-desc {
  font-size: var(--fs-caption);
  font-weight: var(--fw-light);
  color: var(--grey-mid);
  line-height: 1.5;
  max-width: var(--measure-narrow);
}

/* Tools */
.tools-grid { display: flex; flex-wrap: wrap; gap: var(--space-sm); }
.tool-chip { display: inline-flex; align-items: baseline; gap: var(--space-sm); padding: 0.35rem 0.75rem; font-size: var(--fs-caption); transition: color 0.15s; }
.tool-chip:hover { color: var(--accent); }
.tool-name { font-weight: var(--fw-medium); }
.tool-desc { font-weight: var(--fw-light); color: var(--grey-mid); }

/* Expand / Collapse Publications */
.view-all-toggle {
  background: none; border: none;
  font-family: var(--font); font-size: var(--fs-micro); font-weight: var(--fw-semibold);
  text-transform: uppercase; letter-spacing: 0.1em;
  color: var(--grey-mid); cursor: pointer;
  margin-top: var(--space-lg); transition: color 0.15s;
}
.view-all-toggle:hover { color: var(--accent); }
.expanded-publications { margin-top: 0; }
.expanded-publications[hidden] { display: none; }

/* View All Link */
.view-all { margin-top: var(--space-lg); font-size: var(--fs-caption); }
.view-all a { color: var(--accent); }
.view-all a:hover { text-decoration: underline; }

/* Footer */
.footer { padding: var(--space-xl) 0; border-top: var(--rule); display: flex; justify-content: space-between; align-items: baseline; flex-wrap: wrap; gap: var(--space-md); }
.footer-left { font-size: var(--fs-micro); font-weight: var(--fw-light); color: var(--grey-mid); letter-spacing: 0.04em; text-transform: uppercase; }
.footer-right { font-size: var(--fs-micro); font-weight: var(--fw-light); color: var(--grey-mid); }
.footer-right a { margin-inline-start: var(--space-lg); }
.footer-right a:hover { color: var(--accent); }

/* Mobile Navigation */
.mobile-nav-toggle {
  display: none; position: fixed; top: var(--space-md); right: var(--space-md); z-index: 200;
  width: 44px; height: 44px; align-items: center; justify-content: center;
  background: var(--white); border: var(--rule); cursor: pointer;
}
.mobile-nav-overlay {
  display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.4);
  z-index: 300; opacity: 0; visibility: hidden; transition: opacity 0.3s ease, visibility 0.3s ease;
}
.mobile-nav-overlay.visible { opacity: 1; visibility: visible; }
.mobile-nav-panel {
  display: none; position: fixed; top: 0; right: 0; width: min(280px, 85vw);
  height: 100vh; background: var(--white); z-index: 301;
  transform: translateX(100%); transition: transform 0.3s ease, visibility 0.3s;
  padding: var(--space-lg); flex-direction: column; visibility: hidden;
}
.mobile-nav-panel.open { transform: translateX(0); visibility: visible; }
.mobile-nav-close {
  position: absolute; top: var(--space-md); right: var(--space-md); width: 36px; height: 36px;
  display: flex; align-items: center; justify-content: center;
  background: none; border: none; cursor: pointer; color: var(--grey-mid);
}
.mobile-nav-links { list-style: none; margin: 3rem 0 0; padding: 0; display: flex; flex-direction: column; gap: var(--space-sm); }
.mobile-nav-link {
  display: block; padding: 0.75rem var(--space-md); font-size: var(--fs-caption);
  font-weight: var(--fw-regular); letter-spacing: 0.04em; text-transform: uppercase;
  color: var(--grey-mid); transition: color 0.15s;
}
.mobile-nav-link:hover, .mobile-nav-link.active { color: var(--black); }

/* Scroll Reveal */
.reveal {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Scroll Targets */
section[id] { scroll-margin-top: var(--space-3xl); }

/* Focus Visible */
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 768px) {
  .page::before, .page::after { display: none; }
  .hero { padding: 3.5rem 0 var(--space-2xl); }
  .section { padding: var(--space-2xl) 0; }

  .pub-row,
  .oss-row,
  .edu-item {
    grid-template-columns: 1fr;
    gap: var(--space-xs);
  }

  .nav { gap: var(--space-md); }
  .nav-links { display: none; }
  .mobile-nav-toggle, .mobile-nav-overlay, .mobile-nav-panel { display: flex; }
  .footer { flex-direction: column; align-items: flex-start; }
  .footer-right a { margin-inline-start: 0; margin-inline-end: var(--space-lg); }
}

@media (max-width: 480px) {
  .hero-name { font-size: clamp(2.5rem, 14vw, 4rem); max-width: 100%; }
  .nav-logo { width: 100%; }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* Print */
@media print {
  body { color: black; background: white; }
  a { text-decoration: underline; }
  .nav, .nav-links, .mobile-nav-toggle, .mobile-nav-overlay, .mobile-nav-panel, .footer-right { display: none !important; }
  .page { border: none; }
  .page::before, .page::after { display: none; }
  .pub-row, .oss-row, .edu-item { break-inside: avoid; }
}