:root {
  --page-bg: #f3efe5;
  --page-tint: #e6efe7;
  --surface: rgba(255, 252, 247, 0.92);
  --surface-strong: #fffdf8;
  --ink: #142520;
  --muted: #53635d;
  --line: rgba(20, 37, 32, 0.12);
  --accent: #136f63;
  --accent-deep: #0d4f47;
  --accent-warm: #bd6d2f;
  --shadow: 0 18px 50px rgba(24, 41, 35, 0.12);
}

body {
  background:
    radial-gradient(circle at top left, rgba(189, 109, 47, 0.12), transparent 34%),
    radial-gradient(circle at 85% 10%, rgba(19, 111, 99, 0.1), transparent 30%),
    linear-gradient(180deg, #f8f4ec 0%, var(--page-bg) 35%, #f0ece3 100%);
  color: var(--ink);
  font-family: "IBM Plex Sans", sans-serif;
  font-size: 18px;
  line-height: 1.75;
}

a {
  color: var(--accent);
}

a:hover,
a:focus {
  color: var(--accent-deep);
}

.site-btn {
  background-color: var(--accent);
  color: #fff !important;
}

.site-btn:hover,
.site-btn:focus {
  background-color: var(--accent-deep);
}

.site-btn.site-btn--form {
  background-color: var(--accent-warm);
}

.site-btn.site-btn--form:hover,
.site-btn.site-btn--form:focus {
  background-color: #cb7b3d !important;
}

.menu {
  height: 78px;
  padding-top: 0;
  backdrop-filter: blur(14px);
}

.menu .menu__wrapper {
  margin-top: 28px;
}

.menu .menu__wrapper nav,
.mobile-menu .mobile-menu__wrapper {
  font-family: "IBM Plex Mono", monospace;
  letter-spacing: 0.06em;
}

.menu .menu__wrapper nav a {
  color: rgba(255, 250, 242, 0.88);
}

.menu .menu__wrapper nav a:hover {
  color: #fff;
}

.menu .menu__wrapper nav a:after {
  background: var(--accent-warm);
}

.menu.menu--active {
  background: rgba(255, 252, 247, 0.92);
  box-shadow: 0 10px 30px rgba(20, 37, 32, 0.08);
}

.menu.menu--active .menu__wrapper {
  margin-top: 28px;
}

.menu.menu--active .menu__wrapper a {
  color: var(--ink) !important;
}

.menu.menu--active .menu__wrapper a:hover {
  color: var(--accent) !important;
}

.menu .menu__mobile-button,
.menu.menu--active .menu__mobile-button {
  color: #fff !important;
}

.menu.menu--active .menu__mobile-button {
  color: var(--ink) !important;
  margin-top: 0;
}

.mobile-menu {
  background: rgba(14, 31, 28, 0.96);
}

.hero {
  position: relative;
  overflow: hidden;
  padding: 135px 0 90px;
  color: #fff7ef;
  background:
    linear-gradient(135deg, rgba(8, 26, 24, 0.92), rgba(18, 59, 54, 0.82)),
    url("../img/img_bg_header.jpg") center center / cover no-repeat;
}

.hero__mesh {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 18% 24%, rgba(255, 210, 161, 0.18), transparent 22%),
    radial-gradient(circle at 85% 14%, rgba(85, 177, 161, 0.24), transparent 24%),
    linear-gradient(110deg, transparent 0%, rgba(255, 255, 255, 0.06) 50%, transparent 100%);
  pointer-events: none;
}

.hero__inner {
  position: relative;
  z-index: 1;
}

.eyebrow {
  margin-bottom: 18px;
  color: rgba(255, 241, 222, 0.8);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.hero__title,
.section-heading h2,
.focus-card h3,
.paper-highlight h3,
.paper-card h3,
.panel-card h3,
.software-card h3,
.resource-card h3,
.contact-panel h3,
.profile-card__title {
  font-family: "Cormorant Garamond", serif;
  letter-spacing: 0.01em;
}

.hero__title {
  margin-bottom: 10px;
  font-size: clamp(3.4rem, 5vw, 5.2rem);
  line-height: 0.94;
}

.hero__subtitle {
  max-width: 12.5ch;
  margin-bottom: 18px;
  font-size: clamp(1.5rem, 2.6vw, 2rem);
  line-height: 1.05;
  color: #f8e1c5;
}

.hero__summary {
  max-width: 650px;
  color: rgba(255, 247, 239, 0.9);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
  margin: 32px 0 24px;
}

.hero__button {
  background-color: var(--accent-warm);
  box-shadow: 0 16px 28px rgba(189, 109, 47, 0.24);
}

.hero__button:hover,
.hero__button:focus {
  background-color: #cb7b3d;
}

.hero__link {
  color: rgba(255, 245, 232, 0.9);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.84rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.hero__link:hover,
.hero__link:focus {
  color: #fff;
  text-decoration: none;
}

.hero__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 0;
  margin: 0 0 34px;
  list-style: none;
}

.hero__tags li {
  padding: 10px 14px;
  border: 1px solid rgba(255, 247, 239, 0.18);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.74rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.hero__stats,
.teaching-metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.stat-card,
.metric-card {
  padding: 20px 18px;
  border: 1px solid rgba(255, 247, 239, 0.12);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.08);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

.stat-card__value,
.metric-card__value {
  display: block;
  margin-bottom: 6px;
  font-family: "Cormorant Garamond", serif;
  font-size: 2rem;
  line-height: 1;
}

.stat-card__label,
.metric-card__label {
  display: block;
  color: rgba(255, 247, 239, 0.82);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.profile-card {
  margin-top: 24px;
  overflow: hidden;
  border: 1px solid rgba(255, 247, 239, 0.14);
  border-radius: 28px;
  background: rgba(255, 253, 248, 0.1);
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
}

.profile-card__image {
  width: 100%;
  height: 360px;
  object-fit: cover;
  object-position: center 18%;
}

.profile-card__body {
  padding: 28px;
}

.profile-card__kicker {
  margin-bottom: 8px;
  color: rgba(255, 241, 222, 0.72);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.profile-card__title {
  margin-bottom: 18px;
  font-size: 2rem;
  line-height: 1;
}

.profile-card__list {
  margin-bottom: 20px;
}

.profile-card__list dt {
  margin-bottom: 2px;
  color: rgba(255, 241, 222, 0.68);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.profile-card__list dd {
  margin-bottom: 14px;
  margin-left: 0;
  color: #fff8f1;
}

.profile-card__social {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.profile-card__social a {
  color: rgba(255, 247, 239, 0.76);
}

.profile-card__social a:hover,
.profile-card__social a:focus {
  color: #fff;
  text-decoration: none;
}

.section-shell {
  padding: 88px 0;
}

.section-shell--tinted {
  background:
    radial-gradient(circle at top right, rgba(19, 111, 99, 0.08), transparent 24%),
    linear-gradient(180deg, rgba(230, 239, 231, 0.72) 0%, rgba(243, 239, 229, 0) 100%);
}

.section-shell--dark {
  background:
    linear-gradient(135deg, #10211e, #16312c),
    radial-gradient(circle at top left, rgba(189, 109, 47, 0.24), transparent 24%);
  color: #f8f3ec;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 38px;
}

.section-heading h2 {
  margin-bottom: 14px;
  font-size: clamp(2.3rem, 3vw, 3.5rem);
  line-height: 0.98;
}

.section-heading p {
  color: var(--muted);
}

.section-heading--light p,
.section-heading--light h2 {
  color: #f8f3ec;
}

.row + .achievement-grid,
.row + .capability-grid,
.row + .software-strip,
.row + .resource-grid {
  margin-top: 26px;
}

.focus-card,
.achievement-card,
.paper-highlight,
.panel-card,
.capability-card,
.software-card,
.resource-card,
.contact-panel {
  height: 100%;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.focus-card,
.paper-highlight {
  margin-bottom: 24px;
}

.focus-card__eyebrow,
.paper-highlight__meta,
.paper-card__meta,
.timeline-item__date {
  margin-bottom: 12px;
  color: var(--accent);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.achievement-grid,
.capability-grid,
.leadership-grid,
.software-strip,
.resource-grid,
.paper-grid {
  display: grid;
  gap: 24px;
}

.achievement-grid,
.capability-grid,
.software-strip {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.leadership-grid,
.resource-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.paper-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 24px;
}

.paper-card {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: var(--surface-strong);
  box-shadow: var(--shadow);
}

.paper-card img,
.resource-card img {
  width: 100%;
  height: 220px;
  object-fit: cover;
}

.paper-card__body,
.resource-card__body {
  padding: 24px;
}

.paper-card__links,
.resource-card__links,
.contact-panel__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 18px;
}

.paper-card__links a,
.resource-card__links a,
.software-card a {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.timeline-list {
  display: grid;
  gap: 18px;
}

.timeline-item {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 14px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.timeline-item:first-child {
  padding-top: 0;
  border-top: 0;
}

.timeline-item h4 {
  margin-bottom: 4px;
  font-size: 1.05rem;
}

.bullet-list,
.course-list {
  margin: 0;
  padding-left: 20px;
}

.bullet-list li,
.course-list li {
  margin-bottom: 10px;
}

.course-list span {
  display: inline-block;
  min-width: 64px;
  margin-right: 12px;
  color: var(--accent);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.metric-card {
  border-color: var(--line);
  background: var(--surface);
}

.metric-card__label {
  color: var(--muted);
}

.contact-panel,
.contact-form {
  height: 100%;
}

.contact-panel {
  background: rgba(255, 252, 247, 0.08);
  border-color: rgba(255, 247, 239, 0.12);
}

.contact-panel__list dt {
  margin-top: 16px;
  color: rgba(255, 241, 222, 0.7);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.contact-panel__list dd {
  margin-left: 0;
  margin-bottom: 0;
}

.contact-panel__list a,
.contact-panel__actions .hero__link {
  color: #fff;
}

.contact-form {
  padding: 28px;
  border: 1px solid rgba(255, 247, 239, 0.12);
  border-radius: 24px;
  background: rgba(255, 252, 247, 0.08);
  box-shadow: var(--shadow);
}

.contact-form__title {
  margin-bottom: 16px;
  font-family: "Cormorant Garamond", serif;
  font-size: 2rem;
  line-height: 1;
}

.contact-form__honeypot {
  position: absolute;
  left: -9999px;
}

.form-status {
  margin-bottom: 16px;
  padding: 14px 16px;
  border-radius: 14px;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.82rem;
  letter-spacing: 0.03em;
}

.form-status--success {
  background: rgba(56, 179, 143, 0.2);
  color: #ddfff4;
}

.form-status--error {
  background: rgba(224, 104, 104, 0.22);
  color: #ffe7e7;
}

.contacts .contacts__form input,
.contacts .contacts__form textarea,
.contact-form .form-field {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid rgba(255, 247, 239, 0.2);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  font-family: "IBM Plex Sans", sans-serif;
}

.contact-form .form-field::placeholder {
  color: rgba(255, 247, 239, 0.7);
}

.contact-form textarea.form-field {
  min-height: 170px;
  resize: vertical;
}

.contact-form .form-field:focus {
  outline: none;
  border-color: rgba(255, 247, 239, 0.48);
  box-shadow: 0 0 0 4px rgba(255, 247, 239, 0.08);
}

.site-footer {
  margin-top: 34px;
  color: rgba(255, 241, 222, 0.66);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

@media screen and (max-width: 1199px) {
  .hero__stats,
  .teaching-metrics,
  .achievement-grid,
  .capability-grid,
  .software-strip {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media screen and (max-width: 991px) {
  .hero {
    padding-top: 120px;
  }

  .profile-card {
    margin-top: 40px;
  }

  .paper-grid,
  .leadership-grid,
  .resource-grid {
    grid-template-columns: 1fr;
  }

  .timeline-item {
    grid-template-columns: 1fr;
    gap: 8px;
  }
}

@media screen and (max-width: 760px) {
  body {
    font-size: 16px;
  }

  .section-shell {
    padding: 68px 0;
  }

  .hero__stats,
  .teaching-metrics,
  .achievement-grid,
  .capability-grid,
  .software-strip {
    grid-template-columns: 1fr;
  }

  .hero__title {
    font-size: 3.2rem;
  }

  .hero__subtitle {
    max-width: none;
  }

  .profile-card__image {
    height: 300px;
  }
}