:root {
  --paper: #f7f5f0;
  --surface: #ffffff;
  --ink: #1c2230;
  --ink-soft: #5a6473;
  --line: #e7e3da;
  --line-2: #efece5;
  --navy: #23305a;
  --indigo: #3b4a8c;
  --accent: #b08d57;      /* soft gold — academic crest */
  --accent-soft: #f0e6d3;
  --pass: #2e7d5b;
  --fail: #c0392b;
  --skip: #b07d1a;
  --shadow: 0 18px 40px -24px rgba(28, 34, 48, .35);
  --shadow-sm: 0 6px 18px -12px rgba(28, 34, 48, .4);
  --radius: 16px;
  --radius-sm: 10px;
  --serif: "Fraunces", Georgia, serif;
  --sans: "Inter", system-ui, sans-serif;
  --mono: "JetBrains Mono", monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--sans);
  background: var(--paper);
  color: var(--ink);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
.container { width: min(1120px, 92vw); margin: 0 auto; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: .5rem;
  font: 600 .92rem/1 var(--sans);
  padding: .72rem 1.2rem; border-radius: 999px;
  border: 1px solid transparent; cursor: pointer;
  transition: transform .15s ease, box-shadow .2s ease, background .2s;
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }
.btn--primary { background: var(--navy); color: #fff; box-shadow: var(--shadow-sm); }
.btn--primary:hover { background: var(--indigo); }
.btn--outline { border-color: var(--line); background: var(--surface); color: var(--ink); }
.btn--outline:hover { border-color: var(--navy); }
.btn--ghost { background: transparent; color: var(--ink-soft); border-color: var(--line); }
.btn--ghost:hover { color: var(--navy); border-color: var(--navy); }
.btn--danger { background: var(--fail); color: #fff; }
.btn--danger:hover { filter: brightness(1.08); }

.eyebrow {
  display: inline-block; font: 600 .74rem/1 var(--mono);
  letter-spacing: .18em; text-transform: uppercase;
  color: var(--accent); margin-bottom: .8rem;
}

/* ---------- Navbar ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(247, 245, 240, .82);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.nav__inner { display: flex; align-items: center; gap: 1.5rem; padding: .8rem 0; }
.brand { display: flex; align-items: center; gap: .7rem; margin-right: auto; }
.brand__mark {
  width: 42px; height: 42px; display: grid; place-items: center;
  border-radius: 12px; background: var(--navy); color: #fff;
  font: 700 1rem/1 var(--serif); letter-spacing: .04em;
  border: 2px solid var(--accent); box-shadow: var(--shadow-sm);
}
.brand__text { display: flex; flex-direction: column; line-height: 1.2; }
.brand__text strong { font: 600 1rem var(--serif); }
.brand__text em { font-size: .72rem; color: var(--ink-soft); font-style: normal; letter-spacing: .04em; }
.nav__links { display: flex; gap: 1.6rem; }
.nav__links a { font-weight: 500; font-size: .92rem; color: var(--ink-soft); position: relative; }
.nav__links a:hover { color: var(--navy); }
.nav__links a::after {
  content: ""; position: absolute; left: 0; bottom: -6px; width: 0; height: 2px;
  background: var(--accent); transition: width .25s;
}
.nav__links a:hover::after { width: 100%; }

/* ---------- Hero ---------- */
.hero { position: relative; overflow: hidden; padding: 5.5rem 0 4.5rem; }
.hero__grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(var(--line-2) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-2) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 30%, #000 40%, transparent 100%);
  opacity: .7;
}
.hero__inner { position: relative; text-align: center; }
.hero__title {
  font: 700 clamp(2.1rem, 5vw, 3.6rem)/1.08 var(--serif);
  letter-spacing: -.01em; color: var(--navy); margin-bottom: 1.2rem;
}
.hero__title span { color: var(--accent); font-style: italic; }
.hero__sub { max-width: 640px; margin: 0 auto 1.8rem; color: var(--ink-soft); font-size: 1.06rem; }
.hero__cta { display: flex; gap: .8rem; justify-content: center; flex-wrap: wrap; }
.hero__stats {
  display: flex; gap: 2.4rem; justify-content: center; flex-wrap: wrap;
  margin-top: 3rem;
}
.stat { text-align: center; }
.stat b { display: block; font: 700 2rem var(--serif); color: var(--navy); }
.stat span { font-size: .82rem; color: var(--ink-soft); }

/* ---------- Sections ---------- */
.section { padding: 4.5rem 0; }
.section--alt { background: var(--surface); border-block: 1px solid var(--line); }
.section__head { display: flex; align-items: flex-end; justify-content: space-between; gap: 1.5rem; flex-wrap: wrap; margin-bottom: 2.2rem; }
.section__title { font: 700 clamp(1.6rem, 3vw, 2.2rem) var(--serif); color: var(--navy); letter-spacing: -.01em; }

/* ---------- Filters ---------- */
.filters { display: flex; gap: .5rem; flex-wrap: wrap; }
.filters button {
  font: 500 .84rem var(--sans); padding: .45rem .9rem; border-radius: 999px;
  border: 1px solid var(--line); background: var(--surface); color: var(--ink-soft);
  cursor: pointer; transition: .18s;
}
.filters button:hover { border-color: var(--navy); color: var(--navy); }
.filters button.is-active { background: var(--navy); color: #fff; border-color: var(--navy); }

/* ---------- Projects grid ---------- */
.projects { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 1.4rem; }
.card {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; cursor: pointer; display: flex; flex-direction: column;
  transition: transform .22s ease, box-shadow .22s ease, border-color .22s;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: var(--accent); }
.card__media {
  height: 168px; background: var(--accent-soft); position: relative;
  display: grid; place-items: center; overflow: hidden;
}
.card__media img { width: 100%; height: 100%; object-fit: cover; }
.card__media--pattern {
  background:
    radial-gradient(circle at 20% 30%, rgba(59,74,140,.14), transparent 40%),
    linear-gradient(135deg, #fdfbf6, #f0e6d3);
}
.card__glyph { font: 700 2.4rem var(--serif); color: var(--navy); opacity: .5; }
.card__cat {
  position: absolute; top: 12px; left: 12px;
  font: 600 .68rem/1 var(--mono); letter-spacing: .08em; text-transform: uppercase;
  background: rgba(255,255,255,.9); color: var(--navy);
  padding: .4rem .6rem; border-radius: 6px; border: 1px solid var(--line);
}
.card__body { padding: 1.2rem 1.3rem 1.4rem; display: flex; flex-direction: column; gap: .6rem; flex: 1; }
.card__title { font: 600 1.2rem var(--serif); color: var(--navy); }
.card__summary { font-size: .92rem; color: var(--ink-soft); flex: 1; }
.card__tools { display: flex; gap: .4rem; flex-wrap: wrap; }
.chip { font: 500 .72rem var(--mono); background: var(--line-2); color: var(--ink-soft); padding: .28rem .55rem; border-radius: 6px; }
.card__cta { font-size: .84rem; font-weight: 600; color: var(--accent); display: flex; align-items: center; gap: .35rem; }

.empty { text-align: center; color: var(--ink-soft); padding: 3rem 0; }

/* ---------- About ---------- */
.about { display: grid; grid-template-columns: 1.2fr 1fr; gap: 2.5rem; align-items: center; }
.about__text p { color: var(--ink-soft); font-size: 1.05rem; }
.about__card { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.8rem; box-shadow: var(--shadow-sm); }
.about__card h3 { font: 600 1.2rem var(--serif); color: var(--navy); margin-bottom: 1rem; }
.checklist { list-style: none; display: grid; gap: .7rem; }
.checklist li { position: relative; padding-left: 1.9rem; color: var(--ink-soft); font-size: .95rem; }
.checklist li::before {
  content: "✓"; position: absolute; left: 0; top: -1px;
  width: 1.3rem; height: 1.3rem; display: grid; place-items: center;
  background: var(--accent-soft); color: var(--accent); border-radius: 6px; font-size: .78rem; font-weight: 700;
}

/* ---------- Skills ---------- */
.skills { display: flex; flex-wrap: wrap; gap: .7rem; }
.skill-tag {
  background: var(--surface); border: 1px solid var(--line); border-radius: 999px;
  padding: .6rem 1.1rem; font: 500 .92rem var(--sans); color: var(--ink);
  box-shadow: var(--shadow-sm); transition: .18s;
}
.skill-tag:hover { border-color: var(--accent); color: var(--navy); transform: translateY(-2px); }

/* ---------- Contact ---------- */
.contact { text-align: center; }
.contact p { color: var(--ink-soft); margin: .6rem auto 1.6rem; max-width: 520px; }
.contact__links { display: flex; gap: .8rem; justify-content: center; flex-wrap: wrap; }
.contact__links a { display: inline-flex; }

/* ---------- Footer ---------- */
.footer { border-top: 1px solid var(--line); padding: 2rem 0; background: var(--surface); }
.footer .container { display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; font-size: .84rem; color: var(--ink-soft); }
.footBrand { color: var(--navy); font-weight: 600; }

/* ---------- Modal ---------- */
.modal { position: fixed; inset: 0; z-index: 100; display: grid; place-items: center; padding: 1.2rem; }
.modal[hidden] { display: none; }
.modal__backdrop { position: absolute; inset: 0; background: rgba(28,34,48,.5); backdrop-filter: blur(3px); animation: fade .2s; }
.modal__panel {
  position: relative; background: var(--surface); border-radius: var(--radius);
  width: min(720px, 100%); max-height: 90vh; overflow: auto;
  box-shadow: 0 30px 70px -20px rgba(28,34,48,.5); animation: pop .25s ease;
}
.modal__panel--wide { width: min(860px, 100%); }
.modal__panel--admin { width: min(880px, 100%); }
.modal__close {
  position: absolute; top: 14px; right: 16px; z-index: 3;
  width: 36px; height: 36px; border-radius: 50%; border: 1px solid var(--line);
  background: var(--surface); color: var(--ink-soft); font-size: 1.4rem; cursor: pointer; line-height: 1;
}
.modal__close:hover { color: var(--fail); border-color: var(--fail); }
@keyframes fade { from { opacity: 0; } }
@keyframes pop { from { opacity: 0; transform: translateY(12px) scale(.98); } }

/* ---------- Preview content ---------- */
.pv__head { padding: 2rem 2rem 1.2rem; border-bottom: 1px solid var(--line); }
.pv__cat { font: 600 .72rem var(--mono); letter-spacing: .1em; text-transform: uppercase; color: var(--accent); }
.pv__title { font: 700 1.8rem var(--serif); color: var(--navy); margin: .4rem 0 .6rem; }
.pv__desc { color: var(--ink-soft); }
.pv__tools { display: flex; gap: .4rem; flex-wrap: wrap; margin-top: 1rem; }
.pv__body { padding: 1.6rem 2rem 2rem; }
.pv__label { font: 600 .8rem var(--mono); letter-spacing: .08em; text-transform: uppercase; color: var(--ink-soft); margin-bottom: 1rem; display: flex; align-items: center; gap: .6rem; }
.pv__label::after { content: ""; flex: 1; height: 1px; background: var(--line); }

/* interactive checklist */
.tc { display: grid; gap: .55rem; }
.tc__item {
  display: flex; align-items: center; gap: .8rem; padding: .8rem 1rem;
  border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--paper);
  cursor: pointer; transition: .15s; user-select: none;
}
.tc__item:hover { border-color: var(--navy); }
.tc__box {
  width: 22px; height: 22px; border-radius: 6px; border: 2px solid var(--line);
  display: grid; place-items: center; flex-shrink: 0; font-size: .8rem; font-weight: 700; color: #fff;
}
.tc__item[data-checked="true"] .tc__box { background: var(--pass); border-color: var(--pass); }
.tc__label { flex: 1; font-size: .95rem; }
.tc__item[data-checked="true"] .tc__label { color: var(--ink-soft); text-decoration: line-through; }
.tc__status { font: 600 .68rem var(--mono); text-transform: uppercase; padding: .2rem .5rem; border-radius: 5px; letter-spacing: .05em; }
.st-pass { background: #e3f2eb; color: var(--pass); }
.st-fail { background: #fbe6e3; color: var(--fail); }
.st-skip { background: #fbf1dd; color: var(--skip); }
.tc__progress { margin-top: 1.2rem; }
.tc__bar { height: 8px; border-radius: 999px; background: var(--line-2); overflow: hidden; }
.tc__bar span { display: block; height: 100%; background: linear-gradient(90deg, var(--pass), #3aa87a); width: 0; transition: width .4s ease; }
.tc__count { font-size: .82rem; color: var(--ink-soft); margin-top: .5rem; }

/* iframe demo */
.pv__frame { width: 100%; height: 460px; border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--paper); }
.pv__frame-hint { font-size: .82rem; color: var(--ink-soft); margin-top: .7rem; }
.pv__openlink { margin-top: 1rem; }

/* bug board */
.bugs { display: grid; gap: .6rem; }
.bug {
  display: flex; align-items: center; gap: .9rem; padding: .85rem 1rem;
  border: 1px solid var(--line); border-left-width: 4px; border-radius: var(--radius-sm); background: var(--paper);
}
.bug--pass { border-left-color: var(--pass); }
.bug--fail { border-left-color: var(--fail); }
.bug--skip { border-left-color: var(--skip); }
.bug__label { flex: 1; font-size: .95rem; }

/* ---------- Admin panel ---------- */
.admin { padding: 2rem; }
.admin__title { font: 700 1.5rem var(--serif); color: var(--navy); }
.admin__sub { color: var(--ink-soft); margin: .3rem 0 1.4rem; }
.admin__hint { color: var(--ink-soft); font-size: .82rem; margin-top: 1rem; }
.admin__topbar { display: flex; align-items: center; gap: 1rem; flex-wrap: wrap; margin-bottom: 1.6rem; }
.admin__topbar .admin__title { margin-right: auto; }
.admin__tabs { display: flex; gap: .3rem; background: var(--paper); padding: .3rem; border-radius: 999px; border: 1px solid var(--line); }
.tab { font: 500 .86rem var(--sans); padding: .45rem 1rem; border-radius: 999px; border: none; background: transparent; color: var(--ink-soft); cursor: pointer; }
.tab.is-active { background: var(--navy); color: #fff; }
.tabpane { display: none; }
.tabpane.is-active { display: block; }
.admin__actions { margin-bottom: 1.2rem; }
.admin__list { display: grid; gap: .6rem; }
.arow { display: flex; align-items: center; gap: 1rem; padding: .9rem 1.1rem; border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--paper); }
.arow__info { flex: 1; min-width: 0; }
.arow__info b { font: 600 1rem var(--sans); color: var(--navy); display: block; }
.arow__info span { font-size: .82rem; color: var(--ink-soft); }
.arow__actions { display: flex; gap: .4rem; }
.icon-btn { border: 1px solid var(--line); background: var(--surface); border-radius: 8px; padding: .45rem .7rem; cursor: pointer; font-size: .82rem; color: var(--ink-soft); }
.icon-btn:hover { color: var(--navy); border-color: var(--navy); }
.icon-btn--del:hover { color: var(--fail); border-color: var(--fail); }

/* forms */
.field { margin-bottom: 1rem; display: flex; flex-direction: column; gap: .35rem; }
.field label { font-size: .82rem; font-weight: 600; color: var(--ink); }
.field label code { font: 500 .78rem var(--mono); background: var(--line-2); padding: .1rem .3rem; border-radius: 4px; color: var(--indigo); }
.field input, .field select, .field textarea {
  font: 400 .95rem var(--sans); padding: .7rem .85rem; border: 1px solid var(--line);
  border-radius: var(--radius-sm); background: var(--surface); color: var(--ink); width: 100%; resize: vertical;
}
.field input:focus, .field select:focus, .field textarea:focus { outline: none; border-color: var(--navy); box-shadow: 0 0 0 3px rgba(35,48,90,.1); }
.field textarea { font-family: var(--mono); font-size: .86rem; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.pform { border-top: 1px solid var(--line); margin-top: 1.4rem; padding-top: 1.4rem; }
.pform h3 { font: 600 1.15rem var(--serif); color: var(--navy); margin-bottom: 1rem; }
.pform__actions { display: flex; gap: .6rem; margin-top: .5rem; }
.login-error { color: var(--fail); font-size: .86rem; margin-bottom: .8rem; }

.datacard { border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 1.4rem; margin-bottom: 1rem; background: var(--paper); }
.datacard h3 { font: 600 1.1rem var(--serif); color: var(--navy); margin-bottom: .5rem; }
.datacard p { color: var(--ink-soft); font-size: .9rem; margin-bottom: 1rem; }
.datacard--danger { border-color: #f0d0cb; background: #fdf3f1; }

/* toast */
.toast {
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%);
  background: var(--navy); color: #fff; padding: .8rem 1.4rem; border-radius: 999px;
  font-size: .9rem; z-index: 200; box-shadow: var(--shadow); animation: pop .25s;
}
.toast[hidden] { display: none; }
.toast--error { background: var(--fail); }

/* ---------- Responsive ---------- */
@media (max-width: 760px) {
  .nav__links { display: none; }
  .about { grid-template-columns: 1fr; }
  .grid2 { grid-template-columns: 1fr; }
  .section__head { flex-direction: column; align-items: flex-start; }
  .admin, .pv__head, .pv__body { padding-left: 1.2rem; padding-right: 1.2rem; }
}