/* =========================================================
   Martin Kellerhals — Board Advisor Site
   Palette: Navy / Anthracite / Muted Gold accent
   Type: Cormorant Garamond (display serif) + Inter (sans)
   ========================================================= */

:root {
  --bg: #0a1524;          /* deep navy */
  --bg-2: #0e2036;        /* elevated */
  --bg-3: #14263f;        /* card */
  --line: rgba(255, 255, 255, 0.09);
  --line-strong: rgba(255, 255, 255, 0.18);
  --fg: #ecefe6;          /* warm off-white */
  --fg-2: #b7c1cf;        /* body */
  --fg-3: #8391a3;        /* muted */
  --accent: #c9a94d;      /* muted gold */
  --accent-2: #e0c274;
  --danger: #a86146;

  --serif: "Cormorant Garamond", "EB Garamond", Georgia, "Times New Roman", serif;
  --sans:  "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

  --measure: 62ch;
  --radius: 2px;
  --shadow-lg: 0 30px 80px -30px rgba(0, 0, 0, 0.6);

  --pad-x: clamp(1.25rem, 4vw, 3rem);
  --sect-y: clamp(4rem, 9vw, 8rem);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--sans);
  color: var(--fg-2);
  background: var(--bg);
  font-size: 16px;
  line-height: 1.6;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, svg { max-width: 100%; display: block; }
a { color: var(--fg); text-decoration: none; transition: color .2s ease; }
a:hover { color: var(--accent-2); }
::selection { background: var(--accent); color: var(--bg); }

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding-inline: var(--pad-x);
}

/* ---------- Typography ---------- */
h1, h2, h3, h4 {
  font-family: var(--serif);
  color: var(--fg);
  font-weight: 500;
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin: 0;
}
.eyebrow {
  font-family: var(--sans);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.25rem;
  display: inline-block;
}
.section-title {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  margin-bottom: 1rem;
  max-width: 22ch;
}
.section-lead {
  font-family: var(--sans);
  color: var(--fg-2);
  font-size: 1.0625rem;
  max-width: var(--measure);
  margin: 0 0 3rem 0;
}
.rule {
  width: 40px;
  height: 1px;
  background: var(--accent);
  margin: 1.25rem 0 1.75rem;
  border: 0;
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(10, 21, 36, 0.82);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: 0.9rem;
  gap: 2rem;
}
.brand {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  color: var(--fg);
}
.brand-mark {
  height: 40px;
  width: 40px;
  border-radius: 50%;
  overflow: hidden;
  background: var(--bg-2);
  border: 1px solid var(--line-strong);
  flex: 0 0 auto;
}
.brand-mark img { height: 100%; width: 100%; object-fit: cover; }
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-name {
  font-family: var(--serif);
  font-size: 1.15rem;
  color: var(--fg);
  letter-spacing: 0.01em;
}
.brand-sub {
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fg-3);
}
.nav {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}
.nav a {
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--fg-2);
  text-transform: uppercase;
}
.nav a:hover { color: var(--accent-2); }
.lang {
  display: flex;
  align-items: center;
  gap: 0;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  overflow: hidden;
  padding: 2px;
}
.lang button {
  background: transparent;
  border: 0;
  color: var(--fg-3);
  font-family: var(--sans);
  font-size: 11px;
  letter-spacing: 0.1em;
  padding: 5px 12px;
  cursor: pointer;
  border-radius: 999px;
  transition: all .2s ease;
}
.lang button.is-active { background: var(--accent); color: var(--bg); }
.nav-toggle { display: none; }

@media (max-width: 860px) {
  .nav { display: none; }
  .nav.is-open {
    display: flex;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    background: var(--bg-2);
    padding: 1rem var(--pad-x) 1.5rem;
    border-bottom: 1px solid var(--line);
  }
  .nav.is-open a { padding: 0.65rem 0; width: 100%; border-bottom: 1px solid var(--line); }
  .nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px; height: 40px;
    background: transparent;
    border: 1px solid var(--line-strong);
    border-radius: 4px;
    color: var(--fg);
    cursor: pointer;
  }
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: clamp(5rem, 10vw, 9rem) 0 clamp(4rem, 8vw, 7rem);
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute; inset: 0;
  background: url("../img/hero-bg.svg") center/cover no-repeat;
  opacity: 0.55;
  z-index: 0;
}
.hero::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(10, 21, 36, 0.3) 0%, rgba(10, 21, 36, 0.85) 100%);
  z-index: 0;
}
.hero .container { position: relative; z-index: 1; display: grid; grid-template-columns: 1.35fr 1fr; gap: clamp(2rem, 5vw, 4.5rem); align-items: center; }
.hero-text .eyebrow { color: var(--accent); }
.hero-title {
  font-size: clamp(2.25rem, 5.5vw, 4.25rem);
  font-weight: 500;
  color: var(--fg);
  letter-spacing: -0.015em;
  line-height: 1.05;
  margin-bottom: 1.5rem;
}
.hero-title em { font-style: italic; color: var(--accent-2); font-weight: 400; }
.hero-tag {
  font-family: var(--sans);
  font-size: 1.0625rem;
  color: var(--fg-2);
  max-width: 42ch;
  margin-bottom: 2rem;
  line-height: 1.55;
}
.hero-meta {
  display: flex; flex-wrap: wrap; gap: 1.25rem 2rem;
  border-top: 1px solid var(--line);
  padding-top: 1.25rem;
  margin-bottom: 2rem;
}
.hero-meta div { font-size: 12px; letter-spacing: 0.15em; text-transform: uppercase; color: var(--fg-3); }
.hero-meta strong { display: block; font-family: var(--serif); font-size: 1rem; color: var(--fg); letter-spacing: 0; text-transform: none; font-weight: 500; margin-top: 4px; }

.hero-cta { display: inline-flex; align-items: center; gap: 0.75rem; }
.btn {
  display: inline-flex; align-items: center; gap: 0.6rem;
  font-family: var(--sans);
  font-size: 13px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.95rem 1.5rem;
  border-radius: 2px;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all .2s ease;
}
.btn-primary { background: var(--accent); color: var(--bg); }
.btn-primary:hover { background: var(--accent-2); color: var(--bg); }
.btn-ghost { background: transparent; color: var(--fg); border-color: var(--line-strong); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent-2); }

.hero-portrait {
  position: relative;
  aspect-ratio: 4 / 5;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  background: var(--bg-2);
  box-shadow: var(--shadow-lg);
}
.hero-portrait img { width: 100%; height: 100%; object-fit: cover; filter: grayscale(0.1) contrast(1.02); }
.hero-portrait::after {
  content: "";
  position: absolute; inset: 0;
  border: 1px solid rgba(201,169,77,.15);
  pointer-events: none;
  mix-blend-mode: overlay;
}
.hero-badge {
  position: absolute; bottom: -1px; left: -1px;
  background: var(--bg);
  color: var(--accent);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  padding: 10px 16px;
  border: 1px solid var(--line-strong);
  border-left: 0; border-bottom: 0;
}

@media (max-width: 860px) {
  .hero .container { grid-template-columns: 1fr; }
  .hero-portrait { max-width: 380px; margin: 0 auto; }
}

/* ---------- Section base ---------- */
section { padding-block: var(--sect-y); position: relative; }
.section-head { max-width: 780px; margin-bottom: 3rem; }
.section-alt { background: var(--bg-2); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }

/* ---------- Positioning ---------- */
.positioning-lead {
  font-family: var(--serif);
  font-size: clamp(1.25rem, 2.2vw, 1.65rem);
  line-height: 1.5;
  color: var(--fg);
  max-width: 55ch;
  font-weight: 400;
  font-style: italic;
  margin-bottom: 3rem;
}
.questions {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.q-card {
  background: var(--bg);
  padding: 2rem 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  min-height: 220px;
}
.q-num {
  font-family: var(--serif);
  font-size: 1.75rem;
  color: var(--accent);
  font-weight: 500;
  letter-spacing: 0;
}
.q-text {
  font-family: var(--serif);
  font-size: 1.15rem;
  line-height: 1.4;
  color: var(--fg);
  font-weight: 400;
}

/* ---------- Competences ---------- */
.comp-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}
.comp {
  padding: 1.75rem 1.5rem 1.5rem;
  border: 1px solid var(--line);
  background: var(--bg-3);
  position: relative;
  transition: border-color .25s ease, transform .25s ease;
}
.comp:hover { border-color: var(--accent); transform: translateY(-2px); }
.comp-icon {
  width: 32px; height: 1px; background: var(--accent);
  margin-bottom: 1rem;
}
.comp h3 { font-size: 1.1rem; margin-bottom: 0.5rem; letter-spacing: 0; }
.comp p { font-size: 0.95rem; margin: 0; color: var(--fg-2); }

/* ---------- Track record timeline ---------- */
.timeline {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  border-left: 1px solid var(--line);
  padding-left: 2rem;
}
.tl-item {
  position: relative;
  padding-block: 1.5rem;
  border-bottom: 1px solid var(--line);
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 2rem;
  align-items: start;
}
.tl-item::before {
  content: "";
  position: absolute;
  left: -2.4rem; top: 2rem;
  width: 8px; height: 8px;
  background: var(--accent);
  border-radius: 50%;
}
.tl-year {
  font-family: var(--serif);
  font-size: 1rem;
  color: var(--accent);
  letter-spacing: 0.05em;
  padding-top: 2px;
}
.tl-body h3 { font-size: 1.1rem; margin-bottom: 0.3rem; }
.tl-body p { font-size: 0.95rem; margin: 0; color: var(--fg-2); }

@media (max-width: 640px) {
  .tl-item { grid-template-columns: 1fr; gap: 0.35rem; }
}

/* ---------- Featured Publication ---------- */
.featured {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: clamp(2rem, 5vw, 4rem);
  padding: clamp(2rem, 4vw, 3rem);
  border: 1px solid var(--line-strong);
  background: linear-gradient(135deg, var(--bg-3) 0%, var(--bg-2) 100%);
  position: relative;
}
.featured::before {
  content: "";
  position: absolute; top: 0; left: 0; width: 4px; height: 60px;
  background: var(--accent);
}
.featured-label {
  font-size: 11px; letter-spacing: 0.25em; text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.25rem; display: block;
}
.featured h3 {
  font-size: clamp(1.5rem, 2.6vw, 2rem);
  margin-bottom: 0.5rem;
  line-height: 1.15;
}
.featured .featured-sub {
  font-family: var(--serif);
  font-style: italic;
  color: var(--fg-2);
  font-size: 1.05rem;
  margin-bottom: 1.5rem;
}
.featured p { color: var(--fg-2); margin: 0 0 1.5rem; }
.takeaways {
  list-style: none; padding: 0; margin: 0 0 2rem;
  display: grid; gap: 0.75rem;
}
.takeaways li {
  padding-left: 1.5rem;
  position: relative;
  font-size: 0.95rem;
  color: var(--fg);
}
.takeaways li::before {
  content: "";
  position: absolute; left: 0; top: 0.6em;
  width: 0.75rem; height: 1px; background: var(--accent);
}
.featured-actions { display: flex; flex-wrap: wrap; gap: 0.75rem; }

.magazine {
  aspect-ratio: 3/4;
  background: linear-gradient(160deg, #d94e2b 0%, #a0331b 100%);
  color: #fff;
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}
.magazine::after {
  content: "";
  position: absolute; inset: 0;
  background: radial-gradient(ellipse at top right, rgba(255,255,255,0.15), transparent 60%);
}
.mag-top { display: flex; justify-content: space-between; align-items: baseline; font-family: var(--serif); position: relative; z-index: 1; }
.mag-title { font-size: 2.5rem; font-weight: 600; letter-spacing: -0.02em; }
.mag-issue { font-size: 0.85rem; opacity: 0.9; }
.mag-headline {
  font-family: var(--serif);
  font-size: 1.5rem;
  line-height: 1.15;
  font-weight: 500;
  position: relative; z-index: 1;
}
.mag-headline em { font-style: italic; font-weight: 400; }
.mag-tag {
  font-family: var(--sans);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  opacity: 0.85;
  position: relative; z-index: 1;
}

@media (max-width: 860px) {
  .featured { grid-template-columns: 1fr; }
  .magazine { max-width: 300px; margin: 0 auto; }
}

/* ---------- Books grid ---------- */
.books {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}
.book { text-align: left; }
.book-cover {
  aspect-ratio: 300 / 420;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  transition: transform .3s ease, box-shadow .3s ease;
  margin-bottom: 1rem;
  background: var(--bg-3);
}
.book:hover .book-cover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.book h4 { font-size: 1rem; margin-bottom: 0.25rem; line-height: 1.25; }
.book-meta { font-size: 0.85rem; color: var(--fg-3); }
.book-note { font-size: 0.85rem; color: var(--fg-2); margin-top: 0.5rem; line-height: 1.45; }

.teaching {
  margin-top: 3rem;
  padding: 1.75rem;
  border: 1px solid var(--line);
  background: var(--bg);
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1.25rem;
  align-items: center;
}
.teaching-label {
  font-size: 11px; letter-spacing: 0.22em; text-transform: uppercase; color: var(--accent);
}
.teaching-body { color: var(--fg); font-family: var(--serif); font-size: 1.05rem; }
.teaching-body span { color: var(--fg-3); font-family: var(--sans); font-size: 0.9rem; display: block; margin-top: 0.25rem; }

/* ---------- Networks ---------- */
.badges {
  display: flex; flex-wrap: wrap; gap: 0.75rem;
}
.badge {
  padding: 0.75rem 1.15rem;
  border: 1px solid var(--line-strong);
  background: var(--bg-3);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--fg);
  text-transform: uppercase;
  border-radius: 2px;
  transition: border-color .2s;
}
.badge:hover { border-color: var(--accent); color: var(--accent-2); }

/* ---------- Testimonial ---------- */
.testimonial-section {
  padding: clamp(4rem, 8vw, 6rem) 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.container.narrow {
  max-width: 820px;
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 3vw, 2rem);
}
.testimonial {
  margin: 0;
  text-align: center;
  position: relative;
}
.testimonial::before {
  content: "“";
  display: block;
  font-family: var(--serif);
  font-size: 5rem;
  line-height: 0.5;
  color: var(--accent);
  margin-bottom: 1rem;
  opacity: 0.65;
}
.testimonial-quote {
  font-family: var(--serif);
  font-size: clamp(1.35rem, 2.3vw, 1.7rem);
  line-height: 1.5;
  color: var(--fg);
  font-style: italic;
  font-weight: 400;
  margin: 0 0 2rem;
}
.testimonial-source {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  align-items: center;
}
.testimonial-name {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--fg);
  letter-spacing: 0.02em;
}
.testimonial-role {
  font-size: 0.8rem;
  color: var(--fg-3);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* ---------- Section note (small, dezente Board-Diktion-Zeile) ---------- */
.section-note {
  font-family: var(--serif);
  font-style: italic;
  color: var(--accent-2);
  font-size: 1.05rem;
  margin-top: 1.5rem;
  opacity: 0.85;
}

/* ---------- Contact ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2rem, 5vw, 4rem);
}
@media (max-width: 860px) { .contact-grid { grid-template-columns: 1fr; } }

.contact-list { list-style: none; margin: 2rem 0 0; padding: 0; display: grid; gap: 1rem; }
.contact-list li { display: grid; grid-template-columns: 130px 1fr; gap: 1rem; font-size: 0.95rem; border-bottom: 1px solid var(--line); padding-bottom: 0.75rem; }
.contact-list .k { font-size: 11px; letter-spacing: 0.2em; text-transform: uppercase; color: var(--fg-3); padding-top: 3px; }

form.contact-form { display: grid; gap: 1rem; }
.field label {
  display: block;
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--fg-3);
  margin-bottom: 0.4rem;
}
.field input, .field textarea, .field select {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--line-strong);
  color: var(--fg);
  padding: 0.85rem 1rem;
  font-family: var(--sans);
  font-size: 0.95rem;
  border-radius: 2px;
  transition: border-color .2s ease;
}
.field input:focus, .field textarea:focus, .field select:focus {
  outline: none; border-color: var(--accent);
}
.field textarea { min-height: 140px; resize: vertical; }
.form-actions { display: flex; align-items: center; gap: 1rem; }
.form-note { font-size: 12px; color: var(--fg-3); }

/* ---------- Footer ---------- */
.site-footer {
  padding: 3rem 0 2rem;
  border-top: 1px solid var(--line);
  background: var(--bg-2);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 2rem;
  align-items: start;
  margin-bottom: 2rem;
}
@media (max-width: 720px) { .footer-grid { grid-template-columns: 1fr; } }
.footer-brand { display: flex; align-items: center; gap: 1rem; }
.footer-brand .km-mark { height: 42px; }
.footer-brand .kmi-mark { height: 42px; width: 42px; border-radius: 50%; overflow: hidden; border: 1px solid var(--line-strong); }
.footer-brand .kmi-mark img { width: 100%; height: 100%; object-fit: cover; }
.footer-title { font-family: var(--serif); color: var(--fg); font-size: 1.05rem; margin-bottom: 0.35rem; }
.footer-col a { display: block; padding: 0.25rem 0; color: var(--fg-2); font-size: 0.9rem; }
.footer-bar {
  border-top: 1px solid var(--line);
  padding-top: 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  font-size: 12px;
  color: var(--fg-3);
}
.footer-bar a { color: var(--fg-3); }
.footer-bar a:hover { color: var(--accent-2); }

/* ---------- Modal (Impressum / Datenschutz) ---------- */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(6, 12, 22, 0.85);
  z-index: 100;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  overflow-y: auto;
}
.modal.is-open { display: flex; }
.modal-panel {
  background: var(--bg-2);
  border: 1px solid var(--line-strong);
  max-width: 720px;
  width: 100%;
  padding: 2.5rem;
  position: relative;
  max-height: 85vh;
  overflow-y: auto;
}
.modal-close {
  position: absolute; top: 1rem; right: 1rem;
  background: transparent; border: 1px solid var(--line-strong);
  width: 36px; height: 36px; border-radius: 50%;
  color: var(--fg); cursor: pointer; font-size: 18px;
}
.modal h2 { font-size: 1.5rem; margin-bottom: 1rem; }
.modal h3 { font-size: 1.05rem; margin-top: 1.5rem; margin-bottom: 0.5rem; color: var(--accent-2); }
.modal p, .modal ul { font-size: 0.95rem; color: var(--fg-2); }
.modal ul { padding-left: 1.25rem; }

/* ---------- Language toggling ---------- */
html[lang="de"] [data-en], html[lang="en"] [data-de] { display: none; }

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

/* Reduce motion */
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
  html { scroll-behavior: auto; }
}

/* Reveal on scroll */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .8s ease, transform .8s ease; }
.reveal.is-visible { opacity: 1; transform: none; }