/* ==========================================================================
   Helvecio B. Leal Neto — Academic Portfolio
   Institutional / academic visual identity
   ========================================================================== */

/* --- Design tokens ------------------------------------------------------ */
:root {
  /* Surfaces */
  --ivory:        #FBFAF6;
  --paper:        #FFFFFF;
  --paper-alt:    #F5F3ED;
  --paper-deep:   #EFEDE5;

  /* Ink */
  --ink:          #17201B;
  --ink-soft:     #3A453E;
  --ink-muted:    #6B7570;
  --ink-faint:    #939C97;

  /* Accent — deep Amazonian green */
  --accent:       #1B4332;
  --accent-mid:   #2D6A4F;
  --accent-soft:  #40916C;
  --accent-wash:  #EAF1EC;

  /* Secondary — muted brass, for eyebrows and rules */
  --brass:        #9C7B3A;
  --brass-wash:   #F5EFE2;

  /* Structure */
  --rule:         #E3E0D6;
  --rule-strong:  #CFCBBE;

  /* Type */
  --serif:  'Newsreader', 'Iowan Old Style', 'Palatino Linotype', Palatino, Georgia, 'Times New Roman', serif;
  --sans:   'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --mono:   'SF Mono', ui-monospace, 'JetBrains Mono', Menlo, Consolas, monospace;

  /* Metrics */
  --measure:      70rem;
  --measure-text: 40rem;
  --gap:          clamp(3.5rem, 7vw, 6.5rem);
  --pad-x:        clamp(1.25rem, 5vw, 3rem);

  --radius:       2px;
  --shadow-sm:    0 1px 2px rgba(23, 32, 27, .05);
  --shadow:       0 2px 14px rgba(23, 32, 27, .07);
  --shadow-lg:    0 12px 40px rgba(23, 32, 27, .10);

  --t: 220ms cubic-bezier(.4, 0, .2, 1);
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 5.5rem;
}

body {
  margin: 0;
  background: var(--ivory);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1rem;
  line-height: 1.65;
  font-feature-settings: 'kern' 1, 'liga' 1;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; }
a   { color: var(--accent); text-decoration: none; }
h1, h2, h3, h4 { margin: 0; font-weight: 400; letter-spacing: -.011em; }
p  { margin: 0 0 1.1em; }
ul { margin: 0; padding: 0; list-style: none; }

::selection { background: var(--accent); color: #fff; }

:focus-visible {
  outline: 2px solid var(--accent-soft);
  outline-offset: 3px;
  border-radius: var(--radius);
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
}

/* --- Utility ------------------------------------------------------------ */
.wrap {
  width: 100%;
  max-width: var(--measure);
  margin-inline: auto;
  padding-inline: var(--pad-x);
}

.skip-link {
  position: absolute;
  left: 50%;
  top: -100px;
  transform: translateX(-50%);
  z-index: 200;
  background: var(--accent);
  color: #fff;
  padding: .7rem 1.4rem;
  font-size: .85rem;
  font-weight: 600;
  transition: top var(--t);
}
.skip-link:focus { top: .5rem; }

.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;
}

/* ==========================================================================
   Masthead
   ========================================================================== */
.masthead {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(251, 250, 246, .88);
  backdrop-filter: saturate(150%) blur(12px);
  -webkit-backdrop-filter: saturate(150%) blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--t), box-shadow var(--t);
}
.masthead.is-stuck {
  border-bottom-color: var(--rule);
  box-shadow: 0 1px 12px rgba(23, 32, 27, .04);
}

.masthead__inner {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  min-height: 4.5rem;
}

.brand {
  display: flex;
  align-items: baseline;
  gap: .55rem;
  margin-right: auto;
  color: var(--ink);
  font-family: var(--serif);
  font-size: 1.02rem;
  letter-spacing: .07em;
  text-transform: uppercase;
  white-space: nowrap;
}
.brand__mark {
  display: inline-grid;
  place-items: center;
  width: 1.9rem; height: 1.9rem;
  background: var(--accent);
  color: #fff;
  font-size: .78rem;
  font-family: var(--sans);
  font-weight: 600;
  letter-spacing: .02em;
  border-radius: 1px;
  align-self: center;
}
.brand__name { font-weight: 500; }
@media (max-width: 560px) { .brand__name { display: none; } }

/* Navigation */
.nav { display: flex; align-items: center; gap: .25rem; }
@media (max-width: 900px) { .nav { display: none; } }

.nav a {
  position: relative;
  padding: .45rem .7rem;
  color: var(--ink-soft);
  font-size: .8rem;
  font-weight: 500;
  letter-spacing: .045em;
  text-transform: uppercase;
  transition: color var(--t);
}
.nav a::after {
  content: '';
  position: absolute;
  left: .7rem; right: .7rem; bottom: .18rem;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--t);
}
.nav a:hover,
.nav a[aria-current='true'] { color: var(--accent); }
.nav a:hover::after,
.nav a[aria-current='true']::after { transform: scaleX(1); }

/* Language switch */
.lang {
  display: flex;
  align-items: center;
  border: 1px solid var(--rule-strong);
  border-radius: 999px;
  overflow: hidden;
  background: var(--paper);
  flex: none;
}
.lang button {
  appearance: none;
  border: 0;
  background: transparent;
  padding: .38rem .72rem;
  font-family: var(--sans);
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .07em;
  color: var(--ink-muted);
  cursor: pointer;
  transition: background var(--t), color var(--t);
}
.lang button:hover { color: var(--accent); }
.lang button[aria-pressed='true'] { background: var(--accent); color: #fff; }

/* Mobile menu */
.burger {
  display: none;
  appearance: none;
  border: 1px solid var(--rule-strong);
  background: var(--paper);
  width: 2.4rem; height: 2.4rem;
  border-radius: var(--radius);
  cursor: pointer;
  padding: 0;
  place-items: center;
  color: var(--ink);
}
@media (max-width: 900px) { .burger { display: grid; } }
.burger span {
  display: block;
  width: 16px; height: 1.5px;
  background: currentColor;
  transition: transform var(--t), opacity var(--t);
}
.burger span + span { margin-top: 4px; }
.burger[aria-expanded='true'] span:nth-child(1) { transform: translateY(5.5px) rotate(45deg); }
.burger[aria-expanded='true'] span:nth-child(2) { opacity: 0; }
.burger[aria-expanded='true'] span:nth-child(3) { transform: translateY(-5.5px) rotate(-45deg); }

.drawer {
  display: none;
  border-top: 1px solid var(--rule);
  background: var(--paper);
}
.drawer.is-open { display: block; }
.drawer ul { padding: .5rem 0 1rem; }
.drawer a {
  display: block;
  padding: .75rem var(--pad-x);
  color: var(--ink-soft);
  font-size: .82rem;
  font-weight: 500;
  letter-spacing: .05em;
  text-transform: uppercase;
  border-bottom: 1px solid var(--rule);
}
.drawer a:hover { color: var(--accent); background: var(--accent-wash); }

/* ==========================================================================
   Hero
   ========================================================================== */
.hero {
  position: relative;
  padding: clamp(3rem, 8vw, 6rem) 0 clamp(3rem, 7vw, 5rem);
  border-bottom: 1px solid var(--rule);
  background:
    radial-gradient(70rem 34rem at 88% -12%, rgba(45, 106, 79, .07), transparent 60%),
    linear-gradient(180deg, var(--paper) 0%, var(--ivory) 100%);
}

.hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 15rem) minmax(0, 1fr);
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: start;
}
@media (max-width: 760px) {
  .hero__grid { grid-template-columns: 1fr; gap: 2rem; }
}

/* Portrait */
.portrait { position: relative; max-width: 15rem; }
@media (max-width: 760px) { .portrait { max-width: 11rem; } }

.portrait__frame {
  position: relative;
  background: var(--paper);
  padding: .5rem;
  border: 1px solid var(--rule);
  box-shadow: var(--shadow);
}
.portrait__frame::after {
  content: '';
  position: absolute;
  inset: -.55rem;
  border: 1px solid var(--rule-strong);
  pointer-events: none;
}
.portrait img {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  object-position: center 18%;
  filter: saturate(.96);
}

.portrait__caption {
  margin-top: 1.5rem;
  font-family: var(--mono);
  font-size: .68rem;
  line-height: 1.7;
  letter-spacing: .04em;
  color: var(--ink-faint);
  text-transform: uppercase;
}

/* Identity block */
.eyebrow {
  display: flex;
  align-items: center;
  gap: .7rem;
  margin-bottom: 1.1rem;
  font-family: var(--sans);
  font-size: .7rem;
  font-weight: 600;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--brass);
}
.eyebrow::after {
  content: '';
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--rule-strong), transparent);
}

.hero h1 {
  font-family: var(--serif);
  font-size: clamp(2.4rem, 6vw, 4rem);
  line-height: 1.04;
  letter-spacing: -.022em;
  margin-bottom: .55rem;
}
.hero h1 .given { display: block; font-weight: 300; color: var(--ink-soft); }
.hero h1 .family { display: block; font-weight: 500; }

.hero__role {
  font-family: var(--serif);
  font-size: clamp(1.08rem, 2.2vw, 1.32rem);
  font-style: italic;
  color: var(--accent);
  margin-bottom: 1.5rem;
}

.hero__affil {
  padding-left: 1.15rem;
  border-left: 2px solid var(--accent-soft);
  margin-bottom: 1.9rem;
  font-size: .93rem;
  line-height: 1.7;
  color: var(--ink-soft);
}
.hero__affil strong { font-weight: 600; color: var(--ink); }
.hero__affil span { display: block; color: var(--ink-muted); font-size: .87rem; }

/* Profile links */
/* Último elemento do topo desde que as métricas saíram — o respiro abaixo é o
   padding da própria seção. */
.profiles {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
}
.chip {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  padding: .42rem .85rem;
  background: var(--paper);
  border: 1px solid var(--rule-strong);
  border-radius: 999px;
  color: var(--ink-soft);
  font-size: .78rem;
  font-weight: 500;
  letter-spacing: .01em;
  transition: color var(--t), border-color var(--t), background var(--t), transform var(--t);
}
.chip svg { width: 13px; height: 13px; flex: none; }
.chip:hover {
  color: var(--accent);
  border-color: var(--accent-soft);
  background: var(--accent-wash);
  transform: translateY(-1px);
}

/* ==========================================================================
   Sections
   ========================================================================== */
.section { padding: var(--gap) 0; border-bottom: 1px solid var(--rule); }
.section--alt { background: var(--paper-alt); }
.section--paper { background: var(--paper); }

.section__head { margin-bottom: clamp(2.2rem, 4vw, 3.2rem); }

.section__index {
  display: block;
  font-family: var(--mono);
  font-size: .7rem;
  letter-spacing: .16em;
  color: var(--brass);
  margin-bottom: .8rem;
}

.section h2 {
  font-family: var(--serif);
  font-size: clamp(1.85rem, 4vw, 2.65rem);
  line-height: 1.14;
  letter-spacing: -.02em;
  margin-bottom: .7rem;
}

.section__lede {
  max-width: var(--measure-text);
  font-size: 1.02rem;
  line-height: 1.72;
  color: var(--ink-muted);
  margin: 0;
}

/* --- About -------------------------------------------------------------- */
.about {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: start;
}
@media (max-width: 860px) { .about { grid-template-columns: 1fr; } }

.prose {
  font-family: var(--serif);
  font-size: 1.1rem;
  line-height: 1.78;
  color: var(--ink-soft);
}
.prose p:first-child::first-letter {
  float: left;
  font-size: 3.5em;
  line-height: .82;
  padding: .06em .1em 0 0;
  color: var(--accent);
  font-weight: 500;
}
.prose strong { color: var(--ink); font-weight: 600; }

/* Side panel */
.panel {
  background: var(--paper);
  border: 1px solid var(--rule);
  padding: clamp(1.4rem, 3vw, 2rem);
  box-shadow: var(--shadow-sm);
}
.section--paper .panel { background: var(--paper-alt); }

.panel h3 {
  font-family: var(--sans);
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--brass);
  padding-bottom: .75rem;
  margin-bottom: 1.1rem;
  border-bottom: 1px solid var(--rule);
}

.deflist { display: grid; gap: 1rem; }
.deflist div { display: grid; gap: .18rem; }
.deflist dt {
  font-size: .68rem;
  font-weight: 600;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--ink-faint);
}
.deflist dd { margin: 0; font-size: .92rem; color: var(--ink); line-height: 1.55; }
.deflist dd a { border-bottom: 1px solid transparent; transition: border-color var(--t); }
.deflist dd a:hover { border-bottom-color: var(--accent-soft); }

/* --- Research areas ----------------------------------------------------- */
/* As linhas da grade são desenhadas pelas próprias fichas, não por um fundo
   atrás delas: assim uma última fileira incompleta deixa o espaço vazio, em vez
   de expor o fundo como um bloco sólido. */
.cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--rule);
  border-left: 1px solid var(--rule);
}
@media (max-width: 900px) { .cards { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 600px) { .cards { grid-template-columns: 1fr; } }
.card {
  background: var(--paper);
  padding: clamp(1.5rem, 3vw, 2.1rem);
  border-right: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  transition: background var(--t);
}
.section--alt .card { background: var(--ivory); }
.card:hover { background: var(--accent-wash); }

.card__num {
  font-family: var(--mono);
  font-size: .7rem;
  letter-spacing: .12em;
  color: var(--brass);
}
.card h3 {
  font-family: var(--serif);
  font-size: 1.28rem;
  line-height: 1.25;
  margin: .7rem 0 .6rem;
  letter-spacing: -.012em;
}
.card p { font-size: .91rem; line-height: 1.68; color: var(--ink-muted); margin: 0; }

/* Research groups */
.groups {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(17rem, 1fr));
  gap: 1.25rem;
  margin-top: 2.5rem;
}
.group {
  display: flex;
  gap: 1rem;
  padding: 1.35rem 1.5rem;
  background: var(--paper);
  border: 1px solid var(--rule);
  border-left: 3px solid var(--accent-soft);
}
.section--alt .group { background: var(--ivory); }
.group__acr {
  font-family: var(--serif);
  font-size: 1.02rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: .01em;
  white-space: nowrap;
}

/* Caixa deitada, porque logo de grupo quase sempre é horizontal — num quadrado
   o desenho ficaria minúsculo. `contain` acomoda também os quadrados e os altos,
   e a largura fixa impede que um logo largo empurre o texto. */
.group__logo {
  flex: none;
  width: 6.75rem;
  height: 4rem;
  object-fit: contain;
  object-position: left top;
}
@media (max-width: 480px) { .group__logo { width: 5.5rem; height: 3.25rem; } }

.group__link {
  color: inherit;
  border-bottom: 1px solid var(--accent-soft);
  transition: color var(--t), border-color var(--t);
}
.group__link:hover { color: var(--accent); border-bottom-color: var(--accent); }
.group__link::after {
  content: '↗';
  font-size: .75em;
  margin-left: .25em;
  color: var(--accent-soft);
}
.group__body p { margin: 0; font-size: .87rem; line-height: 1.6; color: var(--ink-muted); }
.group__body strong { display: block; color: var(--ink); font-size: .93rem; font-weight: 600; margin-bottom: .15rem; }

/* --- Publications ------------------------------------------------------- */
.filters {
  display: flex;
  flex-wrap: wrap;
  gap: .4rem;
  margin-bottom: 2.2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--rule);
}
.filter {
  appearance: none;
  border: 1px solid var(--rule-strong);
  background: transparent;
  border-radius: 999px;
  padding: .42rem .95rem;
  font-family: var(--sans);
  font-size: .76rem;
  font-weight: 500;
  letter-spacing: .03em;
  color: var(--ink-muted);
  cursor: pointer;
  transition: all var(--t);
}
.filter:hover { color: var(--accent); border-color: var(--accent-soft); }
.filter[aria-pressed='true'] {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.pubs { display: grid; }

.pub {
  display: grid;
  grid-template-columns: 4.5rem minmax(0, 1fr);
  gap: 1.5rem;
  padding: 1.65rem 0;
  border-bottom: 1px solid var(--rule);
  animation: fade-up .4s ease both;
}
.pub:first-child { border-top: 1px solid var(--rule); }
@media (max-width: 640px) {
  .pub { grid-template-columns: 1fr; gap: .55rem; }
}

.pub__year {
  font-family: var(--serif);
  font-size: 1.28rem;
  color: var(--ink-faint);
  line-height: 1.3;
  font-variant-numeric: tabular-nums;
}

.pub__title {
  font-family: var(--serif);
  font-size: 1.14rem;
  line-height: 1.4;
  letter-spacing: -.011em;
  margin-bottom: .5rem;
  color: var(--ink);
}
.pub__title a { color: inherit; border-bottom: 1px solid var(--rule-strong); transition: color var(--t), border-color var(--t); }
.pub__title a:hover { color: var(--accent); border-bottom-color: var(--accent); }

.pub__authors { font-size: .87rem; line-height: 1.6; color: var(--ink-muted); margin-bottom: .55rem; }
.pub__authors .me { color: var(--ink); font-weight: 600; }

.pub__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem .7rem;
  font-size: .78rem;
  color: var(--ink-faint);
}
.pub__venue { font-style: italic; color: var(--accent-mid); font-weight: 500; }

.tag {
  display: inline-block;
  padding: .16rem .55rem;
  border-radius: 2px;
  font-size: .66rem;
  font-weight: 600;
  letter-spacing: .07em;
  text-transform: uppercase;
  background: var(--paper-deep);
  color: var(--ink-muted);
}
.tag--journal   { background: var(--accent-wash); color: var(--accent); }
.tag--conf      { background: #EAEFF5; color: #2A4C73; }
.tag--preprint  { background: var(--brass-wash); color: var(--brass); }
.tag--thesis    { background: #F2EBF3; color: #6B4278; }
.tag--dataset   { background: #EDF1EE; color: #4A6B57; }

.pub__doi {
  font-family: var(--mono);
  font-size: .72rem;
  color: var(--ink-faint);
  transition: color var(--t);
}
.pub__doi:hover { color: var(--accent); }

.pub__cites {
  display: inline-flex;
  align-items: center;
  gap: .3rem;
  font-family: var(--mono);
  font-size: .72rem;
  color: var(--brass);
}

@keyframes fade-up {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: none; }
}

.pubs__note {
  margin-top: 1.6rem;
  font-size: .82rem;
  color: var(--ink-faint);
  font-style: italic;
}

/* --- Teaching ----------------------------------------------------------- */
.courses {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(18rem, 1fr));
  gap: 1.25rem;
}
.course {
  display: flex;
  flex-direction: column;
  background: var(--paper);
  border: 1px solid var(--rule);
  padding: 1.6rem;
  transition: border-color var(--t), transform var(--t), box-shadow var(--t);
}
.section--alt .course { background: var(--ivory); }
.course:hover {
  border-color: var(--accent-soft);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.course__code {
  font-family: var(--mono);
  font-size: .7rem;
  letter-spacing: .1em;
  color: var(--brass);
  margin-bottom: .6rem;
}
.course h3 {
  font-family: var(--serif);
  font-size: 1.2rem;
  line-height: 1.28;
  margin-bottom: .8rem;
  letter-spacing: -.012em;
}
.course__topics {
  display: flex;
  flex-wrap: wrap;
  gap: .35rem;
  margin-bottom: 1.1rem;
}
.course__topics li {
  font-size: .74rem;
  padding: .2rem .55rem;
  background: var(--paper-deep);
  color: var(--ink-muted);
  border-radius: 2px;
}
.section--alt .course__topics li { background: var(--paper-alt); }
.course__foot {
  margin-top: auto;
  padding-top: .9rem;
  border-top: 1px solid var(--rule);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: .75rem;
  font-size: .76rem;
  color: var(--ink-faint);
}
.course__foot a { font-weight: 600; }

/* --- Software ----------------------------------------------------------- */
.repos {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(17rem, 1fr));
  gap: 1.25rem;
}
.repo {
  display: flex;
  flex-direction: column;
  padding: 1.5rem;
  background: var(--paper);
  border: 1px solid var(--rule);
  transition: border-color var(--t), transform var(--t), box-shadow var(--t);
}
.section--alt .repo { background: var(--ivory); }
.repo:hover {
  border-color: var(--accent-soft);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}
.repo--featured {
  grid-column: 1 / -1;
  border-left: 3px solid var(--accent);
  background: linear-gradient(120deg, var(--accent-wash), var(--paper) 45%);
}
.section--alt .repo--featured { background: linear-gradient(120deg, var(--accent-wash), var(--ivory) 45%); }

.repo__top {
  display: flex;
  align-items: center;
  gap: .6rem;
  margin-bottom: .6rem;
  flex-wrap: wrap;
}
.repo h3 {
  font-family: var(--mono);
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: -.01em;
  color: var(--ink);
}
.repo--featured h3 { font-size: 1.2rem; color: var(--accent); }
.repo__stars {
  display: inline-flex;
  align-items: center;
  gap: .22rem;
  font-family: var(--mono);
  font-size: .72rem;
  color: var(--brass);
}
.repo p { font-size: .89rem; line-height: 1.65; color: var(--ink-muted); margin-bottom: 1rem; }
.repo--featured p { font-size: .96rem; max-width: 46rem; }
.repo__links {
  margin-top: auto;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: .78rem;
  font-weight: 600;
}
.repo__links a { display: inline-flex; align-items: center; gap: .3rem; }
.repo__links a:hover { text-decoration: underline; text-underline-offset: 3px; }

/* --- Education timeline ------------------------------------------------- */
.timeline { position: relative; padding-left: 2rem; max-width: 48rem; }
.timeline::before {
  content: '';
  position: absolute;
  left: .3rem; top: .55rem; bottom: .55rem;
  width: 1px;
  background: linear-gradient(180deg, var(--accent-soft), var(--rule-strong));
}
.tl-item { position: relative; padding-bottom: 2.1rem; }
.tl-item:last-child { padding-bottom: 0; }
.tl-item::before {
  content: '';
  position: absolute;
  left: -1.7rem; top: .5rem;
  width: 9px; height: 9px;
  border-radius: 50%;
  background: var(--ivory);
  border: 2px solid var(--accent-soft);
}
.section--paper .tl-item::before { background: var(--paper); }
.tl-item--current::before { background: var(--accent); border-color: var(--accent); }

.tl-item__when {
  font-family: var(--mono);
  font-size: .72rem;
  letter-spacing: .08em;
  color: var(--brass);
  margin-bottom: .35rem;
}
.tl-item h3 {
  font-family: var(--serif);
  font-size: 1.22rem;
  line-height: 1.3;
  margin-bottom: .28rem;
  letter-spacing: -.014em;
}
.tl-item__where { font-size: .9rem; color: var(--ink-soft); margin-bottom: .3rem; }
.tl-item__note { font-size: .86rem; color: var(--ink-muted); font-style: italic; margin: 0; }

/* ==========================================================================
   Contact
   ========================================================================== */
.contact {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.35fr);
  gap: clamp(2rem, 5vw, 4rem);
  align-items: start;
}
@media (max-width: 900px) { .contact { grid-template-columns: 1fr; } }

.contact__aside { display: grid; gap: 1.75rem; }

.contact-item { display: grid; gap: .25rem; }
.contact-item dt {
  font-size: .68rem;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--brass);
}
.contact-item dd { margin: 0; font-size: .95rem; line-height: 1.6; color: var(--ink); }
.contact-item dd a { border-bottom: 1px solid var(--rule-strong); transition: border-color var(--t); }
.contact-item dd a:hover { border-bottom-color: var(--accent); }
.contact-item small { display: block; color: var(--ink-muted); font-size: .82rem; margin-top: .15rem; }

/* Form */
.form {
  background: var(--paper);
  border: 1px solid var(--rule);
  padding: clamp(1.5rem, 3.5vw, 2.5rem);
  box-shadow: var(--shadow-sm);
}
.section--paper .form { background: var(--paper-alt); }

.field { margin-bottom: 1.2rem; }
.field label {
  display: block;
  margin-bottom: .4rem;
  font-size: .74rem;
  font-weight: 600;
  letter-spacing: .09em;
  text-transform: uppercase;
  color: var(--ink-soft);
}
.field .req { color: var(--brass); }

.field input,
.field select,
.field textarea {
  width: 100%;
  padding: .72rem .85rem;
  font-family: var(--sans);
  font-size: .93rem;
  color: var(--ink);
  background-color: var(--ivory);
  border: 1px solid var(--rule-strong);
  border-radius: var(--radius);
  transition: border-color var(--t), box-shadow var(--t), background var(--t);
}
.section--paper .field input,
.section--paper .field select,
.section--paper .field textarea { background-color: var(--paper); }

.field textarea { min-height: 8rem; resize: vertical; line-height: 1.6; }
.field select {
  appearance: none;
  background-image: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12'%3E%3Cpath fill='%236B7570' d='M6 8.2 1.8 4H10.2z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right .85rem center;
  background-size: 11px;
  padding-right: 2.2rem;
  cursor: pointer;
}
.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--accent-soft);
  box-shadow: 0 0 0 3px rgba(64, 145, 108, .14);
}
.field input::placeholder,
.field textarea::placeholder { color: var(--ink-faint); }

.field--invalid input,
.field--invalid select,
.field--invalid textarea { border-color: #B3392F; }
.field__error {
  display: none;
  margin-top: .3rem;
  font-size: .76rem;
  color: #B3392F;
}
.field--invalid .field__error { display: block; }

.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1.2rem; }
@media (max-width: 560px) { .field-row { grid-template-columns: 1fr; gap: 0; } }

.hp { position: absolute; left: -9999px; opacity: 0; height: 0; width: 0; }

/* Button */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: .82rem 1.9rem;
  background: var(--accent);
  color: #fff;
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  font-family: var(--sans);
  font-size: .82rem;
  font-weight: 600;
  letter-spacing: .07em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background var(--t), transform var(--t), box-shadow var(--t);
}
.btn:hover { background: var(--accent-mid); transform: translateY(-1px); box-shadow: var(--shadow); }
.btn:active { transform: none; }
.btn[disabled] { opacity: .55; cursor: not-allowed; transform: none; }
.btn--ghost { background: transparent; color: var(--accent); }
.btn--ghost:hover { background: var(--accent-wash); }

.form__foot {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: .4rem;
}
.form__hint { font-size: .78rem; color: var(--ink-faint); flex: 1; min-width: 12rem; }

.form__status {
  display: none;
  margin-top: 1.2rem;
  padding: .9rem 1.1rem;
  border-radius: var(--radius);
  font-size: .88rem;
  line-height: 1.55;
}
.form__status.is-visible { display: block; animation: fade-up .3s ease both; }
.form__status--ok  { background: var(--accent-wash); color: var(--accent); border-left: 3px solid var(--accent); }
.form__status--err { background: #FBEDEB; color: #8E2F26; border-left: 3px solid #B3392F; }

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
  background: var(--ink);
  color: #C9D2CC;
  padding: clamp(3rem, 6vw, 4.5rem) 0 2rem;
}
.footer__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) repeat(2, minmax(0, 1fr));
  gap: clamp(2rem, 5vw, 3.5rem);
  padding-bottom: 2.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, .1);
}
@media (max-width: 760px) { .footer__grid { grid-template-columns: 1fr; gap: 2rem; } }

.footer__name {
  font-family: var(--serif);
  font-size: 1.35rem;
  color: #fff;
  margin-bottom: .5rem;
  letter-spacing: -.01em;
}
.footer p { font-size: .87rem; line-height: 1.7; color: #9BA8A0; margin-bottom: .4rem; }

.footer h4 {
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: .13em;
  text-transform: uppercase;
  color: #7E8C84;
  margin-bottom: 1rem;
}
.footer li { margin-bottom: .55rem; }
.footer a { color: #C9D2CC; font-size: .87rem; transition: color var(--t); }
.footer a:hover { color: #fff; }

.footer__base {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  padding-top: 1.6rem;
  font-size: .78rem;
  color: #7E8C84;
}
.footer__base a { font-size: .78rem; color: #7E8C84; }

/* Back to top */
.totop {
  position: fixed;
  right: clamp(1rem, 3vw, 2rem);
  bottom: clamp(1rem, 3vw, 2rem);
  z-index: 90;
  display: grid;
  place-items: center;
  width: 2.75rem; height: 2.75rem;
  background: var(--accent);
  color: #fff;
  border: 0;
  border-radius: 50%;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  box-shadow: var(--shadow-lg);
  transition: all var(--t);
}
.totop.is-visible { opacity: 1; visibility: visible; transform: none; }
.totop:hover { background: var(--accent-mid); }

/* ==========================================================================
   Scroll reveal
   ========================================================================== */
.reveal { opacity: 0; transform: translateY(14px); transition: opacity .55s ease, transform .55s ease; }
.reveal.is-in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; } }

/* --- Print -------------------------------------------------------------- */
@media print {
  .masthead, .totop, .form, .filters, .footer { display: none !important; }
  body { background: #fff; }
  .section { break-inside: avoid; border-bottom: 0; }
  a::after { content: ' (' attr(href) ')'; font-size: .7em; color: #666; }
}

/* Trailing "see more" link under a section */
.section__more {
  margin-top: 1.8rem;
  font-size: .85rem;
  font-weight: 600;
}
.section__more a { border-bottom: 1px solid var(--accent-soft); padding-bottom: 1px; }
.section__more a:hover { border-bottom-color: var(--accent); }