@import url('https://fonts.googleapis.com/css2?family=DM+Mono:ital,wght@0,400;0,500;1,400&family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;1,9..40,400&family=Inter:wght@400;500;600&display=swap');

/* ─── Custom Properties ──────────────────────────────────────────── */

:root {
  --bg:             #F8F7F4;
  --blue:           #1d56cf;
  --dark:           #1a1a1a;
  --text:           #1a1a1a;
  --muted:          #888;
  --border:         #d6d5d0;
  --hl:             rgba(29, 86, 207, 0.09);
  --font-mono:      'DM Mono', monospace;
  --font-sans:      'DM Sans', sans-serif;
  --max-w:          720px;
  --nav-h:          52px;
  --folder-blue:    #74bde0;
  --folder-blue-dk: #5aabde;
  --sticker-purple: #6b2df5;
  --sticker-pink:   #ff2d8f;
}

/* ─── DM Mono weight cap (max available: 500 Medium) ─────────────── */

.nav__id, .nav__menu-btn, .overlay__close, .overlay__nav a,
h1, h2, h3,
.section-label, .case-study-label, .case-study-title,
.gate-divider__label, .gate__prompt, .gate__submit, .gate__error,
.resume__name, .resume__section-heading, .resume__role, .resume__degree,
.footer__id, .folder-hero__name, .case-study-back {
  font-weight: 500;
}

/* ─── Reset ──────────────────────────────────────────────────────── */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, svg {
  display: block;
  max-width: 100%;
}

/* ─── Navigation ─────────────────────────────────────────────────── */

nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-h);
  background: var(--bg);
  border-bottom: 2px solid var(--blue);
  z-index: 100;
  transition: transform 0.28s ease;
}

nav.nav--hidden {
  transform: translateY(calc(-1 * var(--nav-h) - 2px));
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-w);
  margin: 0 auto;
  height: 100%;
  padding: 0 24px;
}

.nav__id {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  color: var(--text);
  white-space: nowrap;
  letter-spacing: -0.01em;
}

.nav__menu-btn {
  background: none;
  border: none;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 400;
  color: var(--text);
  line-height: 1;
  padding: 0;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color 0.15s ease;
}

.nav__menu-btn:hover {
  background-color: var(--hl);
}

/* ─── Nav — Inline items (index.html) ───────────────────────────── */

.nav__items {
  display: flex;
  align-items: center;
  gap: 20px;
}

/* work ∨ dropdown */
.nav__work {
  position: relative;
}

.nav__work-label {
  font-family: var(--font-sans);
  font-size: 13px;
  color: var(--muted);
  cursor: default;
  padding: 3px 6px;
  transition: background-color 0.15s ease, color 0.15s ease;
  user-select: none;
}

.nav__chevron {
  font-size: 9px;
  margin-left: 1px;
}

.nav__work:hover .nav__work-label {
  background-color: var(--hl);
  color: var(--text);
}

.nav__work-menu {
  position: absolute;
  top: calc(100% + 10px);
  left: -8px;
  background: var(--bg);
  border: 1px solid var(--border);
  min-width: 190px;
  z-index: 150;
  display: none;
}

.nav__work:hover .nav__work-menu {
  display: block;
}

.nav__work-menu a {
  display: block;
  font-family: var(--font-sans);
  font-size: 13px;
  color: var(--text);
  text-decoration: none;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  transition: background-color 0.15s ease;
}

.nav__work-menu a:last-child {
  border-bottom: none;
}

.nav__work-menu a:hover {
  background-color: var(--hl);
}

/* resume link */
.nav__resume {
  font-family: var(--font-sans);
  font-size: 13px;
  color: var(--muted);
  text-decoration: none;
  padding: 3px 6px;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.nav__resume:hover {
  background-color: var(--hl);
  color: var(--text);
}

/* ─── Overlay Menu ───────────────────────────────────────────────── */

.overlay {
  position: fixed;
  inset: 0;
  background: var(--dark);
  z-index: 200;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.22s ease;
}

.overlay.overlay--open {
  opacity: 1;
  pointer-events: all;
}

.overlay__close {
  position: absolute;
  top: 10px;
  right: 24px;
  background: none;
  border: none;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 400;
  color: #666;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 0.15s ease, background-color 0.15s ease;
}

.overlay__close:hover {
  color: #fff;
  background-color: rgba(255, 255, 255, 0.06);
}

.overlay__nav {
  list-style: none;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.overlay__nav a {
  font-family: var(--font-mono);
  font-size: clamp(34px, 7vw, 58px);
  font-weight: 500;
  color: #c0c0c0;
  text-decoration: none;
  display: inline-block;
  padding: 4px 16px;
  letter-spacing: -0.03em;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.overlay__nav a:hover {
  background-color: rgba(29, 86, 207, 0.22);
  color: #fff;
}

/* ─── Layout ─────────────────────────────────────────────────────── */

main {
  padding-top: calc(var(--nav-h) + 60px);
  padding-bottom: 100px;
}

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

/* ─── Typography ─────────────────────────────────────────────────── */

h1 {
  font-family: var(--font-mono);
  font-size: clamp(22px, 4vw, 30px);
  font-weight: 500;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 24px;
}

h2 {
  font-family: var(--font-mono);
  font-size: clamp(14px, 2vw, 17px);
  font-weight: 500;
  line-height: 1.3;
  letter-spacing: -0.01em;
  margin-bottom: 12px;
  margin-top: 44px;
}

h3 {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  line-height: 1.4;
  margin-bottom: 8px;
  margin-top: 28px;
}

p {
  margin-bottom: 16px;
}

p:last-child {
  margin-bottom: 0;
}

a {
  color: var(--blue);
  text-decoration: none;
}

ul, ol {
  padding-left: 20px;
}

li {
  margin-bottom: 6px;
}

/* ─── Home — Folder Hero ─────────────────────────────────────────── */

.folder-hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-top: 44px;
  margin-bottom: 72px;
  /* paint above the fixed nav (z:100) so stickers are never clipped */
  position: relative;
  z-index: 101;
}

/* Hover trigger. Width drives the SVG scale; height is set by .folder__bottom img. */
.folder {
  position: relative;
  width: 420px;
  cursor: pointer;
  isolation: isolate;
}

/* ── SVG layers ── */

/* Layer 1 — back folder (tab + body). In-flow → sets container height. */
.folder__bottom {
  display: block;
  width: 100%;
  position: relative;
  z-index: 1;
}

/* Layer 3 — front panel. Both SVGs bottom-aligned; default (taller) covers
   stickers at rest; hover (shorter) reveals them on hover.
   Default SVG height  = 420 × 815/1160 ≈ 295px → top edge ≈ 62px from container top
   Hover  SVG height  = 420 × 572/1160 ≈ 207px → top edge ≈ 151px from container top */
.folder__top {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  z-index: 3;
  pointer-events: none;
  transition: opacity 0.38s ease;
}
.folder__top--default { opacity: 1; }
.folder__top--hover   { opacity: 0; }

.folder:hover .folder__top--default { opacity: 0; }
.folder:hover .folder__top--hover   { opacity: 1; }

/* ─── Stickers ───────────────────────────────────────────────────── */

/* Layer 2 — stickers sit between back (z:1) and front (z:3).
   Font/size spec: Inter 500, -0.02em tracking, 5px stroke, bold look. */
.sticker {
  position: absolute;
  z-index: 2;
  font-family: 'Inter', sans-serif;
  font-weight: 700;
  font-size: 18px;
  letter-spacing: -0.02em;
  line-height: 1;
  white-space: nowrap;
  padding: 11px 24px;
  border-radius: 999px;
  background: #fff;
  border: 4px solid;
  text-decoration: none;
  /* Smooth return to resting state on hover-out */
  transition: transform 0.3s ease-out;
}

.sticker-purple {
  color: var(--sticker-purple);
  border-color: var(--sticker-purple);
}

.sticker-pink {
  color: var(--sticker-pink);
  border-color: var(--sticker-pink);
}

/* Sticker positions — two rows inside the ~102px hover-reveal gap.
   Container = 420×358px. Default panel top ≈ y:62. Hover panel top ≈ y:151.

   Row 1 (top ≈ 52–57px): pill tops peek 5–11px above default panel at y:62.
   Row 2 (top ≈ 93–97px): fully hidden behind default panel, revealed on hover.

   Horizontal layout (pill widths at 18px Inter):
     sticker-1 "ux designer"      ≈ 178px wide → x:228–406
     sticker-2 "@ wisetech global"≈ 248px wide → x:0–248   (text ends ~214, gap before sticker-1 ✓)
     sticker-3 "sydney, australia"≈ 236px wide → x:10–246  (text ends ~210, gap before sticker-4 ✓)
     sticker-4 "contact me!"      ≈ 170px wide → x:236–406

   DOM order: sticker-3 → sticker-4 → sticker-2 → sticker-1
   (Row 1 stickers painted on top of Row 2, so row 1 pill bodies mask row 2 tops) */
.sticker-1 { left: 228px; top:  52px; transform: rotate(-5deg);  } /* ux designer       */
.sticker-2 { left:   0px; top:  57px; transform: rotate(-7deg);  } /* @ wisetech global */
.sticker-3 { left:  10px; top: 100px; transform: rotate(7deg);   } /* sydney, australia */
.sticker-4 { left: 236px; top: 100px; transform: rotate(-5deg);  } /* contact me!       */

/* Disable transition during forward animation so it doesn't fight @keyframes */
.folder:hover .sticker {
  transition: none;
}

/* Staggered reveal — stickers slide up with spring easing as panel opens.
   from-transform matches resting rotation to prevent jump on hover-in. */
.folder:hover .sticker-1 { animation: reveal-1 0.38s cubic-bezier(0.34, 1.56, 0.64, 1) 0.00s forwards; }
.folder:hover .sticker-2 { animation: reveal-2 0.38s cubic-bezier(0.34, 1.56, 0.64, 1) 0.07s forwards; }
.folder:hover .sticker-3 { animation: reveal-3 0.38s cubic-bezier(0.34, 1.56, 0.64, 1) 0.14s forwards; }
.folder:hover .sticker-4 { animation: reveal-4 0.38s cubic-bezier(0.34, 1.56, 0.64, 1) 0.21s forwards; }

@keyframes reveal-1 {
  from { transform: rotate(-5deg) translateY(10px); }
  to   { transform: rotate(-5deg) translateY(0px);  }
}
@keyframes reveal-2 {
  from { transform: rotate(-7deg) translateY(10px); }
  to   { transform: rotate(-7deg) translateY(0px);  }
}
@keyframes reveal-3 {
  from { transform: rotate(7deg)  translateY(10px); }
  to   { transform: rotate(7deg)  translateY(0px);  }
}
@keyframes reveal-4 {
  from { transform: rotate(-5deg) translateY(10px); }
  to   { transform: rotate(-5deg) translateY(0px);  }
}

/* crystal.chiu name below folder */
.folder-hero__name {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: clamp(24px, 5vw, 40px);
  letter-spacing: -0.02em;
  color: var(--text);
  margin-top: 20px;
  margin-bottom: 0;
  line-height: 1;
  user-select: none;
}

/* ─── Section Label ──────────────────────────────────────────────── */

.section-label {
  font-family: var(--font-mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--muted);
  display: block;
  margin-bottom: 0;
}

/* ─── Project List ───────────────────────────────────────────────── */

.project-list {
  list-style: none;
  border-top: 1px solid var(--border);
  margin-top: 12px;
  padding: 0;
}

.project-entry {
  padding: 22px 0;
  border-bottom: 1px solid var(--border);
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 20px;
}

.project-entry__title {
  font-family: 'Inter', sans-serif;
  font-size: 14px;
  font-weight: 600;
  margin: 0 0 5px 0;
  letter-spacing: -0.01em;
}

.project-entry__tagline {
  font-size: 14px;
  color: var(--muted);
  margin: 0;
  line-height: 1.5;
}

.project-entry__link {
  font-family: 'Inter', sans-serif;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.01em;
  color: var(--blue);
  text-decoration: none;
  white-space: nowrap;
  padding: 6px 12px;
  border: 1px solid var(--blue);
  transition: background-color 0.15s ease, color 0.15s ease;
}

.project-entry__link:hover {
  background-color: var(--blue);
  color: #fff;
}

/* ─── About Page ─────────────────────────────────────────────────── */

.about-bio p {
  font-size: 17px;
  line-height: 1.7;
  max-width: 56ch;
}

.skills-section {
  margin-top: 48px;
}

.skills-section p {
  font-size: 16px;
  max-width: 56ch;
}

/* ─── Resume ─────────────────────────────────────────────────────── */

.resume-section {
  margin-top: 56px;
}

.resume-download {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--blue);
  text-decoration: none;
  padding: 3px 7px;
  margin-bottom: 20px;
  transition: background-color 0.15s ease;
}

.resume-download:hover {
  background-color: var(--hl);
}

.resume-download svg {
  flex-shrink: 0;
}

.resume {
  border: 1px solid var(--border);
  padding: 40px 44px;
}

.resume__name {
  font-family: var(--font-mono);
  font-size: 17px;
  font-weight: 500;
  letter-spacing: -0.01em;
  margin-bottom: 6px;
}

.resume__contact {
  font-size: 12px;
  color: var(--muted);
  line-height: 1.8;
  margin-bottom: 0;
}

.resume__contact a {
  color: var(--muted);
  text-decoration: none;
  padding: 0 2px;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.resume__contact a:hover {
  background-color: var(--hl);
  color: var(--blue);
}

.resume__section {
  margin-top: 30px;
}

.resume__section-heading {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--muted);
  border-bottom: 1px solid var(--border);
  padding-bottom: 7px;
  margin-bottom: 18px;
}

.resume__entry {
  margin-bottom: 22px;
}

.resume__entry:last-child {
  margin-bottom: 0;
}

.resume__entry-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  margin-bottom: 2px;
  flex-wrap: wrap;
}

.resume__role {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: -0.01em;
}

.resume__date {
  font-family: var(--font-sans);
  font-size: 11px;
  color: var(--muted);
  white-space: nowrap;
}

.resume__org {
  font-family: var(--font-sans);
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 9px;
}

.resume__bullets {
  list-style: none;
  padding: 0;
  margin: 0;
}

.resume__bullets li {
  font-family: var(--font-sans);
  font-size: 12px;
  line-height: 1.65;
  padding-left: 16px;
  position: relative;
  margin-bottom: 5px;
  color: var(--text);
}

.resume__bullets li:last-child {
  margin-bottom: 0;
}

.resume__bullets li::before {
  content: '–';
  position: absolute;
  left: 0;
  color: var(--muted);
}

.resume__edu-entry {
  margin-bottom: 18px;
}

.resume__edu-entry:last-child {
  margin-bottom: 0;
}

.resume__edu-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  flex-wrap: wrap;
}

.resume__degree {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: -0.01em;
}

.resume__school {
  font-family: var(--font-sans);
  font-size: 12px;
  color: var(--muted);
  margin-top: 3px;
}

.resume__lang-list {
  font-family: var(--font-sans);
  font-size: 12px;
  color: var(--text);
  margin-top: 8px;
  line-height: 1.65;
}

/* ─── Case Study Pages ───────────────────────────────────────────── */

.case-study-back {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.05em;
  color: var(--muted);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 36px;
  padding: 2px 5px;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.case-study-back:hover {
  background-color: var(--hl);
  color: var(--blue);
}

.case-study-label {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--muted);
  display: block;
  margin-bottom: 12px;
}

.case-study-title {
  font-family: var(--font-mono);
  font-size: clamp(22px, 4vw, 30px);
  font-weight: 500;
  letter-spacing: -0.025em;
  margin-bottom: 20px;
}

.tldr {
  font-size: 17px;
  font-weight: 500;
  line-height: 1.65;
  max-width: 56ch;
  color: var(--text);
  margin-bottom: 52px;
}

.teaser-section {
  margin-bottom: 36px;
}

.teaser-section h2 {
  margin-top: 0;
}

.teaser-section p {
  font-size: 15px;
  color: var(--muted);
  max-width: 58ch;
}

/* ─── Password Gate ──────────────────────────────────────────────── */

.gate-divider {
  margin: 64px 0 44px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.gate-divider::before,
.gate-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

.gate-divider__label {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--muted);
  white-space: nowrap;
}

.gate {
  margin-bottom: 80px;
}

.gate__prompt {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
  display: block;
  margin-bottom: 14px;
}

.gate__form {
  display: flex;
  max-width: 360px;
}

.gate__input {
  flex: 1;
  font-family: var(--font-mono);
  font-size: 13px;
  padding: 10px 14px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-right: none;
  color: var(--text);
  outline: none;
  transition: border-color 0.15s ease;
  min-width: 0;
}

.gate__input:focus {
  border-color: var(--blue);
}

.gate__input::placeholder {
  color: #c0c0b8;
}

.gate__submit {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.06em;
  padding: 10px 18px;
  background: var(--blue);
  color: #fff;
  border: 1px solid var(--blue);
  cursor: pointer;
  white-space: nowrap;
  transition: opacity 0.15s ease;
}

.gate__submit:hover {
  opacity: 0.82;
}

.gate__error {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  color: #b52a2a;
  margin-top: 10px;
  display: none;
  letter-spacing: 0.02em;
}

.gate__error.visible {
  display: block;
}

.full-content {
  display: none;
}

.full-content.unlocked {
  display: block;
}

.full-content h2 {
  margin-top: 44px;
}

.full-content h2:first-child {
  margin-top: 0;
}

.full-content p {
  font-size: 15px;
  max-width: 58ch;
}

/* ─── Footer ─────────────────────────────────────────────────────── */

footer {
  border-top: 1px solid var(--border);
  padding: 28px 0;
}

.footer__inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.footer__id {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  color: var(--muted);
  letter-spacing: 0.02em;
}

.footer__links {
  display: flex;
  gap: 20px;
  list-style: none;
  padding: 0;
}

.footer__links a {
  font-family: var(--font-sans);
  font-size: 12px;
  color: var(--muted);
  text-decoration: none;
  padding: 2px 4px;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.footer__links a:hover {
  background-color: var(--hl);
  color: var(--blue);
}

/* ─── Responsive ─────────────────────────────────────────────────── */

@media (max-width: 600px) {
  .project-entry {
    grid-template-columns: 1fr;
  }

  .project-entry__link {
    justify-self: start;
    margin-top: 10px;
  }

  .resume {
    padding: 28px 20px;
  }

  .resume__entry-header,
  .resume__edu-header {
    flex-direction: column;
    gap: 1px;
  }

  .gate__form {
    max-width: 100%;
  }

  .folder-hero__name {
    font-size: clamp(26px, 10vw, 36px);
  }
}