/*
Theme Name: Perin Lab
Theme URI: https://perinlab.example.org
Author: Perin Lab
Author URI: https://perinlab.example.org
Description: Custom theme for the Perin Lab — inner ear neuroimmunology research group, Università di Pavia. Minimal black-background design with a prominent image hero, publication and team listings, and a lightweight built-in contact form.
Version: 1.1.0
Requires at least: 6.0
Tested up to: 6.6
Requires PHP: 7.4
License: GNU General Public License v2 or later
License URI: https://www.gnu.org/licenses/gpl-2.0.html
Text Domain: perin-lab
Tags: one-column, custom-logo, custom-menu, featured-images, translation-ready
*/

/* ==========================================================================
   1. Variables & Reset
   ========================================================================== */

:root {
  --color-navy: #f5f5f5;
  --color-navy-light: #ffffff;
  --color-teal: #c62828;
  --color-teal-dark: #ff5252;
  --color-teal-tint: rgba(198, 40, 40, 0.12);
  --color-bg: #000000;
  --color-bg-alt: #0d0d0d;
  --color-text: #f0f0f0;
  --color-text-muted: #9a9a9a;
  --color-border: #2a2a2a;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-serif: 'Source Serif 4', Georgia, 'Times New Roman', serif;
  --container-width: 1160px;
  --radius: 10px;
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
}

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

a { color: var(--color-teal-dark); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  color: var(--color-navy);
  line-height: 1.25;
  font-weight: 600;
  margin: 0 0 0.6em;
}

h1 { font-size: 2.6rem; }
h2 { font-size: 1.9rem; }
h3 { font-size: 1.3rem; }

p { margin: 0 0 1.2em; }

ul, ol { margin: 0 0 1.2em; padding-left: 1.3em; }

.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

.section { padding: 72px 0; }
.section-alt { background: var(--color-bg-alt); }
.section-title { text-align: center; max-width: 640px; margin: 0 auto 48px; }
.section-title p { color: var(--color-text-muted); }

.eyebrow {
  display: inline-block;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--color-teal-dark);
  margin-bottom: 10px;
}

.btn {
  display: inline-block;
  padding: 12px 26px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  border: 2px solid var(--color-teal);
  transition: all 0.15s ease;
  cursor: pointer;
}
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--color-teal); color: #fff; }
.btn-primary:hover { background: var(--color-teal-dark); border-color: var(--color-teal-dark); }
.btn-outline { background: transparent; color: var(--color-teal-dark); }
.btn-outline:hover { background: var(--color-teal-tint); }
.btn-outline-light { border-color: rgba(255,255,255,0.7); color: #fff; }
.btn-outline-light:hover { background: rgba(255,255,255,0.12); }

/* ==========================================================================
   2. Site Header
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(0,0,0,0.9);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--color-border);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.site-branding { display: flex; align-items: center; gap: 12px; }
.site-branding img { max-height: 44px; width: auto; }
.site-title {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-navy);
  margin: 0;
}
.site-title a { color: inherit; }
.site-title a:hover { text-decoration: none; }
.site-tagline { font-size: 0.75rem; color: var(--color-text-muted); margin: 0; }

.primary-menu {
  list-style: none;
  display: flex;
  gap: 6px;
  margin: 0;
  padding: 0;
}
.primary-menu li { position: relative; }
.primary-menu a {
  display: block;
  padding: 10px 16px;
  color: var(--color-navy);
  font-weight: 500;
  font-size: 0.95rem;
  border-radius: 8px;
}
.primary-menu a:hover { background: var(--color-teal-tint); text-decoration: none; }
.primary-menu .current-menu-item > a { color: var(--color-teal-dark); }

.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-navy);
  margin: 5px 0;
}

@media (max-width: 860px) {
  .menu-toggle { display: block; }
  .primary-menu {
    display: none;
    position: absolute;
    top: 76px;
    left: 0;
    right: 0;
    background: #000;
    flex-direction: column;
    border-bottom: 1px solid var(--color-border);
    padding: 8px 24px 16px;
  }
  .primary-menu.is-open { display: flex; }
}

/* ==========================================================================
   3. Hero
   ========================================================================== */

.hero {
  position: relative;
  min-height: 640px;
  display: flex;
  align-items: flex-end;
  color: #fff;
  background-color: #000;
  background-size: cover;
  background-position: center;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(20,33,61,0.35) 0%, rgba(11,18,33,0.55) 55%, rgba(8,13,25,0.92) 100%);
}

.hero-inner {
  position: relative;
  z-index: 2;
  padding: 64px 0 56px;
  max-width: 760px;
}

.hero-logo { height: 52px; width: auto; margin-bottom: 18px; display: block; }
.hero .eyebrow { color: #ff8a8a; }
.hero h1 { color: #fff; font-size: 3rem; margin-bottom: 0.4em; }
.hero p.lede { font-size: 1.15rem; color: rgba(255,255,255,0.9); max-width: 620px; }
.hero-actions { display: flex; gap: 14px; margin-top: 28px; flex-wrap: wrap; }

.hero-fallback-note {
  position: relative;
  z-index: 2;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.6);
  margin-top: 18px;
}

.hero.no-image { background: linear-gradient(135deg, #000 0%, #1a0707 100%); min-height: 480px; }

/* Sub-page header (non-front pages) */
.page-header {
  background: linear-gradient(135deg, #000 0%, #1a0707 100%);
  border-bottom: 1px solid var(--color-border);
  color: #fff;
  padding: 72px 0 56px;
}
.page-header .eyebrow { color: #ff8a8a; }
.page-header h1 { color: #fff; margin-bottom: 0.3em; }
.page-header p { color: rgba(255,255,255,0.85); max-width: 640px; margin-bottom: 0; }

/* ==========================================================================
   4. Cards & Grids
   ========================================================================== */

.grid { display: grid; gap: 28px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

@media (max-width: 860px) {
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
}

.card {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px;
  transition: box-shadow 0.15s ease, transform 0.15s ease, border-color 0.15s ease;
}
.card:hover { box-shadow: 0 8px 24px rgba(0,0,0,0.5); border-color: rgba(198,40,40,0.4); transform: translateY(-2px); }
.card .icon {
  width: 44px; height: 44px;
  border-radius: 10px;
  background: var(--color-teal-tint);
  color: var(--color-teal-dark);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.3rem;
  margin-bottom: 16px;
}
.card h3 { margin-bottom: 0.4em; }
.card p:last-child { margin-bottom: 0; }
.card a.card-link { font-weight: 600; font-size: 0.92rem; }

/* Team member cards */
.team-lead {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 36px;
  background: var(--color-bg-alt);
  border-radius: var(--radius);
  padding: 32px;
  margin-bottom: 48px;
  align-items: start;
}
.team-lead img { border-radius: var(--radius); object-fit: cover; aspect-ratio: 1 / 1; }
@media (max-width: 640px) { .team-lead { grid-template-columns: 1fr; } .team-lead img { max-width: 200px; } }

.team-member { text-align: left; }
.team-member img {
  border-radius: var(--radius);
  aspect-ratio: 1 / 1;
  object-fit: cover;
  margin-bottom: 14px;
  background: var(--color-bg-alt);
}
.team-member .role { color: var(--color-teal-dark); font-weight: 600; font-size: 0.88rem; margin-bottom: 8px; }
.team-member h3 { margin-bottom: 2px; font-size: 1.1rem; }
.team-member .email { font-size: 0.85rem; color: var(--color-text-muted); }

/* Publications */
.pub-year-heading {
  font-family: var(--font-body);
  font-weight: 700;
  color: var(--color-teal-dark);
  border-bottom: 2px solid var(--color-teal-tint);
  padding-bottom: 8px;
  margin: 44px 0 20px;
}
.pub-year-heading:first-of-type { margin-top: 0; }
.publication {
  padding: 18px 0;
  border-bottom: 1px solid var(--color-border);
}
.publication:last-child { border-bottom: none; }
.publication .pub-title { font-weight: 600; color: var(--color-text); margin-bottom: 4px; }
.publication .pub-meta { font-size: 0.92rem; color: var(--color-text-muted); }
.publication .pub-links { margin-top: 6px; font-size: 0.88rem; }
.publication .pub-links a { margin-right: 14px; font-weight: 600; }

/* News */
.news-item {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 24px;
  padding: 24px 0;
  border-bottom: 1px solid var(--color-border);
}
.news-item:last-child { border-bottom: none; }
.news-date { color: var(--color-text-muted); font-size: 0.88rem; padding-top: 4px; }
.news-item h3 { margin-bottom: 6px; }
@media (max-width: 640px) { .news-item { grid-template-columns: 1fr; gap: 6px; } }

/* Positions (Join Us) */
.position {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px 28px;
  margin-bottom: 20px;
}
.position h3 { margin-bottom: 6px; }
.position .tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-teal-dark);
  background: var(--color-teal-tint);
  padding: 4px 10px;
  border-radius: 999px;
  margin-bottom: 10px;
}

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}
@media (max-width: 860px) { .contact-grid { grid-template-columns: 1fr; } }
.contact-info-item { margin-bottom: 24px; }
.contact-info-item .label { font-weight: 700; font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.04em; color: var(--color-teal-dark); margin-bottom: 4px; }

.form-field { margin-bottom: 18px; }
.form-field label { display: block; font-weight: 600; margin-bottom: 6px; font-size: 0.92rem; }
.form-field input, .form-field textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  font-family: var(--font-body);
  font-size: 0.98rem;
  background: var(--color-bg-alt);
  color: var(--color-text);
}
.form-field input:focus, .form-field textarea:focus {
  outline: none;
  border-color: var(--color-teal);
  box-shadow: 0 0 0 3px var(--color-teal-tint);
}
.form-notice { padding: 14px 18px; border-radius: 8px; margin-bottom: 20px; font-size: 0.95rem; border: 1px solid; }
.form-notice.success { background: rgba(76,175,80,0.12); color: #8fd99a; border-color: rgba(76,175,80,0.3); }
.form-notice.error { background: rgba(198,40,40,0.12); color: #ff8a8a; border-color: rgba(198,40,40,0.3); }
.hp-field { position: absolute; left: -9999px; opacity: 0; }

/* CTA banner */
.cta-banner {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  color: #fff;
  border-radius: var(--radius);
  padding: 48px;
  text-align: center;
}
.cta-banner h2 { color: #fff; }
.cta-banner p { color: rgba(255,255,255,0.85); max-width: 560px; margin: 0 auto 24px; }

/* ==========================================================================
   5. Footer
   ========================================================================== */

.site-footer {
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
  color: rgba(255,255,255,0.75);
  padding: 56px 0 28px;
  font-size: 0.92rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
@media (max-width: 700px) { .footer-grid { grid-template-columns: 1fr; } }
.site-footer h4 { color: #fff; font-size: 1rem; margin-bottom: 14px; }
.site-footer a { color: rgba(255,255,255,0.75); }
.site-footer a:hover { color: #fff; }
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer li { margin-bottom: 8px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.15);
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.55);
}
.social-links { display: flex; gap: 10px; }
.social-links a {
  width: 34px; height: 34px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.3);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.85rem;
}

/* ==========================================================================
   6. Editable content typography (the_content areas)
   ========================================================================== */

.entry-content h2 { margin-top: 1.6em; }
.entry-content h2:first-child { margin-top: 0; }
.entry-content ul li, .entry-content ol li { margin-bottom: 0.4em; }
.entry-content img { border-radius: var(--radius); margin: 1.2em 0; }
.entry-content blockquote {
  border-left: 4px solid var(--color-teal);
  margin: 1.4em 0;
  padding: 4px 0 4px 20px;
  color: var(--color-text-muted);
  font-style: italic;
}

.narrow { max-width: 760px; margin: 0 auto; }

/* 404 */
.error-404 { text-align: center; padding: 100px 0; }
.error-404 h1 { font-size: 5rem; color: var(--color-teal); }