/*
 * Andrew C. Rausch, MD — Personal Site
 * Single consolidated stylesheet
 * Modern, minimal, light aesthetic
 */

/* ============================================================
   CSS CUSTOM PROPERTIES
   ============================================================ */

:root {
  /* Colors */
  --color-bg:          #ffffff;
  --color-surface:     #f8f8f8;
  --color-border:      #e5e5e5;
  --color-text:        #666666;
  --color-text-light:  #777777;
  --color-text-muted:  #999999;
  --color-heading:     #2a2a2a;
  --color-subheading:  #3a3a3a;
  --color-accent:      #3399cc;
  --color-accent-dark: #2277aa;
  --color-nav-active:  #2a2a2a;

  /* Typography */
  --font-body:    'Lato', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  --font-size-xs:   0.6875rem;  /* 11px */
  --font-size-sm:   0.8125rem;  /* 13px */
  --font-size-base: 0.9375rem;  /* 15px */
  --font-size-md:   1rem;       /* 16px */
  --font-size-lg:   1.125rem;   /* 18px */
  --font-size-xl:   1.375rem;   /* 22px */
  --font-size-2xl:  1.625rem;   /* 26px */
  --font-size-3xl:  1.875rem;   /* 30px */
  --font-weight-light:  300;
  --font-weight-normal: 400;
  --font-weight-bold:   700;
  --line-height-body:   1.65;
  --line-height-heading: 1.15;

  /* Spacing */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;

  /* Layout */
  --sidebar-width: 260px;
  --content-max:   640px;
  --wrapper-max:   980px;
  --sidebar-gap:   4rem;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;

  /* Borders */
  --radius-sm:   3px;
  --radius-md:   5px;
  --radius-full: 9999px;
}


/* ============================================================
   DARK MODE
   ============================================================ */

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg:          #1a1a1a;
    --color-surface:     #242424;
    --color-border:      #333333;
    --color-text:        #c0c0c0;
    --color-text-light:  #999999;
    --color-text-muted:  #666666;
    --color-heading:     #e8e8e8;
    --color-subheading:  #d4d4d4;
    --color-accent:      #55aadd;
    --color-accent-dark: #3399cc;
    --color-nav-active:  #e8e8e8;
  }
}


/* ============================================================
   RESET & BASE
   ============================================================ */

*, *::before, *::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  padding: 0;
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-light);
  line-height: var(--line-height-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}


/* ============================================================
   TYPOGRAPHY
   ============================================================ */

h1, h2, h3, h4, h5, h6 {
  margin: 0 0 var(--space-4);
  font-family: var(--font-body);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-heading);
  color: var(--color-heading);
}

h1 { font-size: var(--font-size-3xl); }
h2 { font-size: var(--font-size-2xl); color: var(--color-subheading); }
h3 { font-size: var(--font-size-xl);  color: var(--color-subheading); }
h4 { font-size: var(--font-size-lg);  color: var(--color-subheading); }
h5 { font-size: var(--font-size-base); font-weight: var(--font-weight-bold); }
h6 { font-size: var(--font-size-sm); }

p {
  margin: 0 0 var(--space-5);
}

a {
  color: var(--color-accent);
  font-weight: var(--font-weight-normal);
  text-decoration: none;
  transition: color var(--transition-base);
}

a:hover,
a:focus {
  color: var(--color-accent-dark);
  text-decoration: underline;
}

a:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

strong {
  font-weight: var(--font-weight-bold);
  color: var(--color-heading);
}

em {
  font-style: italic;
}

small {
  font-size: var(--font-size-xs);
}

hr {
  border: 0;
  height: 1px;
  background-color: var(--color-border);
  margin: 0 0 var(--space-5);
}

blockquote {
  margin: 0 0 var(--space-5);
  padding: 0 0 0 var(--space-5);
  border-left: 2px solid var(--color-border);
  color: var(--color-text-light);
  font-style: italic;
}

ul, ol {
  margin: 0 0 var(--space-5);
  padding-left: var(--space-6);
}

li {
  margin-bottom: var(--space-2);
}

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


/* ============================================================
   SKIP LINK (accessibility)
   ============================================================ */

.skip-link {
  position: absolute;
  top: -9999px;
  left: var(--space-4);
  z-index: 9999;
  padding: var(--space-2) var(--space-4);
  background: var(--color-heading);
  color: #fff;
  font-size: var(--font-size-sm);
  border-radius: var(--radius-md);
  text-decoration: none;
}

.skip-link:focus {
  top: var(--space-4);
}


/* ============================================================
   PAGE WRAPPER — two-column grid
   ============================================================ */

.site-wrapper {
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr;
  grid-template-rows: 1fr auto;
  grid-template-areas:
    "sidebar main"
    "sidebar footer";
  min-height: 100vh;
  max-width: var(--wrapper-max);
  margin: 0 auto;
  padding: var(--space-12) var(--space-8);
  gap: 0 var(--sidebar-gap);
}


/* ============================================================
   SIDEBAR
   ============================================================ */

.site-sidebar {
  grid-area: sidebar;
  position: sticky;
  top: var(--space-12);
  align-self: start;
  max-height: calc(100vh - var(--space-20));
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  overflow-y: auto;
}

/* Avatar */
.site-avatar {
  display: block;
  width: 80px;
  height: 80px;
  border-radius: var(--radius-full);
  object-fit: cover;
  flex-shrink: 0;
}

.site-identity {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.site-identity .site-name {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--color-heading);
  line-height: 1.15;
  margin: 0;
}

.site-identity .site-tagline {
  font-size: var(--font-size-xs);
  color: var(--color-text-light);
  margin: 0;
  line-height: 1.5;
}


/* ---- Primary navigation ---- */

.site-nav {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.site-nav a {
  display: block;
  padding: var(--space-1) 0;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-normal);
  color: var(--color-text-light);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.site-nav a:hover,
.site-nav a:focus {
  color: var(--color-heading);
  text-decoration: none;
}

.site-nav a[aria-current="page"] {
  color: var(--color-nav-active);
  font-weight: var(--font-weight-bold);
}

.site-nav .nav-cv-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
}

.site-nav .nav-cv-link svg {
  width: 12px;
  height: 12px;
  flex-shrink: 0;
}


/* ---- Contact/social block ---- */

.site-social {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.site-social-label {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin: 0 0 var(--space-1);
}

.site-social a {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.site-social a:hover,
.site-social a:focus {
  color: var(--color-heading);
  text-decoration: none;
}

.site-social svg {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
  color: var(--color-text-muted);
}

/* CV download button in sidebar */
.btn-cv {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-normal);
  font-family: var(--font-body);
  color: var(--color-text-light);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: transparent;
  text-decoration: none;
  cursor: pointer;
  transition:
    color var(--transition-fast),
    border-color var(--transition-fast),
    background-color var(--transition-fast);
  align-self: flex-start;
}

.btn-cv:hover,
.btn-cv:focus {
  color: var(--color-heading);
  border-color: var(--color-text-muted);
  background-color: var(--color-surface);
  text-decoration: none;
}

.btn-cv svg {
  width: 13px;
  height: 13px;
  flex-shrink: 0;
}


/* ============================================================
   MAIN CONTENT
   ============================================================ */

.site-main {
  grid-area: main;
  min-width: 0; /* prevent grid blowout */
}


/* ============================================================
   SITE FOOTER
   ============================================================ */

.site-footer {
  grid-area: footer;
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-border);
  margin-top: var(--space-12);
}

.site-footer p {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin: 0;
  line-height: 1.7;
}

.site-footer a {
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

.site-footer a:hover {
  color: var(--color-text-light);
  text-decoration: none;
}


/* ============================================================
   SECTION COMPONENTS
   ============================================================ */

.page-section {
  padding-bottom: var(--space-12);
}

.page-section + .page-section {
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-10);
}

/* Section heading — uppercase, letter-spaced, muted, bottom border */
.section-heading {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin: 0 0 var(--space-6);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--color-border);
}

/* Intro / hero text on home page */
.intro-headline {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-light);
  color: var(--color-subheading);
  margin: 0 0 var(--space-3);
  line-height: 1.2;
}

.intro-subheadline {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-light);
  color: var(--color-text-light);
  margin: 0 0 var(--space-8);
}


/* ============================================================
   RESEARCH INTERESTS — pill/chip list
   ============================================================ */

.research-interests {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  list-style: none;
  padding: 0;
  margin: 0 0 var(--space-5);
}

.research-interests li {
  margin: 0;
  padding: var(--space-1) var(--space-3);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-normal);
  color: var(--color-text-light);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  line-height: 1.5;
}


/* ============================================================
   CURRENTLY LIST — left-accent-bordered bullets
   ============================================================ */

.currently-list {
  list-style: none;
  padding: 0;
  margin: 0 0 var(--space-5);
}

.currently-list li {
  position: relative;
  padding-left: var(--space-5);
  margin-bottom: var(--space-3);
  font-size: var(--font-size-sm);
  color: var(--color-text);
  border-left: 2px solid var(--color-border);
  transition: border-color var(--transition-base);
}

.currently-list li:hover {
  border-left-color: var(--color-accent);
}


/* ============================================================
   CV / RESUME ENTRIES  (.cv-entry)
   ============================================================ */

.cv-section {
  margin-bottom: var(--space-10);
}

.cv-entry {
  position: relative;
  padding-left: var(--space-5);
  border-left: 2px solid var(--color-border);
  margin-bottom: var(--space-6);
  transition: border-color var(--transition-base);
}

.cv-entry:hover {
  border-left-color: var(--color-accent);
}

.cv-entry-title {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-bold);
  color: var(--color-heading);
  margin: 0 0 var(--space-1);
}

.cv-entry-org {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  margin: 0 0 var(--space-1);
}

.cv-entry-dates {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  display: block;
  margin: 0 0 var(--space-2);
}

.cv-entry-note {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  font-style: italic;
  margin: var(--space-1) 0 0;
}

/* Compact variant — for awards, memberships, licensure */
.cv-entry--compact {
  padding-left: var(--space-4);
  margin-bottom: var(--space-3);
}

.cv-entry--compact .cv-entry-title {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-normal);
  color: var(--color-text);
  margin: 0;
}

.cv-entry--compact .cv-entry-org {
  font-size: var(--font-size-xs);
  display: inline;
  margin: 0;
}

.cv-entry--compact .cv-entry-dates {
  font-size: var(--font-size-xs);
  display: inline;
  margin: 0;
}


/* ============================================================
   PUBLICATIONS  (.pub-entry)
   ============================================================ */

.pub-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.pub-entry {
  padding: var(--space-4) 0;
  border-bottom: 1px solid var(--color-border);
  display: grid;
  grid-template-columns: 2rem 1fr;
  gap: 0 var(--space-4);
  align-items: baseline;
}

.pub-entry:first-child {
  border-top: 1px solid var(--color-border);
}

.pub-index {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  text-align: right;
  user-select: none;
  line-height: 1.6;
}

.pub-body {
  font-size: var(--font-size-sm);
  line-height: 1.65;
  color: var(--color-text);
}

.pub-title {
  font-weight: var(--font-weight-bold);
  color: var(--color-heading);
}

.pub-journal {
  font-style: italic;
}

.pub-authors {
  color: var(--color-text-light);
}

.pub-year {
  color: var(--color-text-muted);
}

.pub-link {
  display: inline-block;
  margin-top: var(--space-1);
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-accent);
  transition: color var(--transition-fast);
  margin-right: var(--space-2);
}

.pub-link:hover {
  color: var(--color-accent-dark);
  text-decoration: none;
}

/* "In Press" and other status badges */
.pub-badge {
  display: inline-block;
  padding: 1px var(--space-2);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-normal);
  color: var(--color-text-muted);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  letter-spacing: 0.03em;
  vertical-align: middle;
}


/* ============================================================
   TABLES
   ============================================================ */

table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--font-size-sm);
  margin-bottom: var(--space-5);
}

th, td {
  text-align: left;
  padding: var(--space-2) var(--space-3);
  border-bottom: 1px solid var(--color-border);
}

th {
  font-weight: var(--font-weight-bold);
  color: var(--color-subheading);
}


/* ============================================================
   UTILITIES
   ============================================================ */

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

.text-muted  { color: var(--color-text-muted); }
.text-light  { color: var(--color-text-light); }
.text-small  { font-size: var(--font-size-sm); }
.text-xs     { font-size: var(--font-size-xs); }


/* ============================================================
   RESPONSIVE — tablet (≤ 860px)
   ============================================================ */

@media screen and (max-width: 860px) {
  .site-wrapper {
    grid-template-columns: 1fr;
    grid-template-areas:
      "sidebar"
      "main"
      "footer";
    padding: var(--space-8) var(--space-6);
    gap: 0;
  }

  .site-sidebar {
    position: static;
    max-height: none;
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
    padding-bottom: var(--space-6);
    margin-bottom: var(--space-6);
    border-bottom: 1px solid var(--color-border);
    overflow-y: visible;
  }

  .site-avatar {
    order: -1;
  }

  .site-identity {
    flex: 1 1 auto;
  }

  .site-nav {
    flex-direction: row;
    flex-wrap: wrap;
    gap: var(--space-1) var(--space-4);
  }

  .site-social {
    flex-direction: row;
    flex-wrap: wrap;
    gap: var(--space-1) var(--space-4);
    width: 100%;
    border-top: 1px solid var(--color-border);
    padding-top: var(--space-3);
  }

  .site-social-label {
    width: 100%;
    margin-bottom: 0;
  }

  .site-footer {
    margin-top: var(--space-8);
  }
}


/* ============================================================
   RESPONSIVE — mobile (≤ 540px)
   ============================================================ */

@media screen and (max-width: 540px) {
  :root {
    --font-size-3xl: 1.5rem;
    --font-size-2xl: 1.25rem;
  }

  .site-wrapper {
    padding: var(--space-6) var(--space-5);
  }

  .site-sidebar {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-3);
  }

  .site-social {
    flex-direction: column;
    gap: var(--space-1);
  }

  .pub-entry {
    grid-template-columns: 1fr;
    gap: var(--space-1);
  }

  .pub-index {
    text-align: left;
  }
}


/* ============================================================
   PRINT
   ============================================================ */

@media print {
  :root {
    --color-accent:      #000000;
    --color-text-light:  #333333;
    --color-text-muted:  #555555;
    --color-bg:          #ffffff;
  }

  body {
    font-size: 11pt;
    color: #000;
    background: #fff;
  }

  .site-wrapper {
    display: block;
    padding: 0;
    max-width: 100%;
  }

  .site-sidebar {
    position: static;
  }

  .skip-link {
    display: none;
  }

  .site-footer {
    border-top: 1px solid #ccc;
  }

  a[href]::after {
    content: " (" attr(href) ")";
    font-size: 0.75em;
    color: #555;
  }

  /* Suppress URL decoration on nav/social links */
  .site-nav a[href]::after,
  .site-social a[href]::after,
  .btn-cv[href]::after {
    content: none;
  }
}