[data-theme="dark"] {
    --bg:          #05222f;
    --bg-mid:      #052547;
    --bg-card:     #052547;
    --text:        #F3EFF0;
    --text-muted:  #F3EFF0;
    --accent:      #F3EFF0;
    --accent-lt:   #86BAA5;
    --accent-dim:  #86BAA5;
    --teal:        #86BAA5;
    --teal-light:  #86BAA5;
    --teal2:       #B03D40;
    --teal2-lt:    #F3EFF0;
    --terracotta:  #B03D40;
    --terra-lt:    #B03D40;
    --red-acc:     #B03D40;
    --lapis:       #052547;
    --lapis-lt:    #052547;
    --pink:        #B03D40;
    --pink-light:  #F3EFF0;
    --nav-bg:      rgba(7,48,93,0.97);
    --border-a:    #86BAA5;
    --border-a-s:  #F3EFF0;
    --strip-bg:    rgba(135,170,109,0.12);
    --portrait-overlay: rgba(7,48,93,0.92);
  }

  [data-theme="light"] {
    --bg:          #F3EFF0;
    --bg-mid:      #F3EFF0;
    --bg-card:     rgba(7,48,93,0.08);
    --text:        #052547;
    --text-muted:  rgba(7,48,93,0.78);
    --accent:      #B03D40;
    --accent-lt:   #86BAA5;
    --accent-dim:  #07305D;
    --teal:        #86BAA5;
    --teal-light:  #052547;
    --teal2:       #B03D40;
    --teal2-lt:    #B03D40;
    --terracotta:  #B03D40;
    --terra-lt:    #052547;
    --red-acc:     #B03D40;
    --lapis:       #052547;
    --lapis-lt:    #052547;
    --pink:        #B03D40;
    --pink-light:  #86BAA5;
    --nav-bg:      white;
    --border-a:    rgba(7,48,93,0.22);
    --border-a-s:  rgba(7,48,93,0.55);
    --strip-bg:    rgba(135,170,109,0.18);
    --portrait-overlay: #F3EFF0;
  }

  :root {
    --font-name: "Magic Story", "Magic Story";
    --font-display: "Espiritu", "Espiritu Regular", "Trebuchet MS", sans-serif;
    --font-body: "Roboto", Arial, sans-serif;
  }

  @font-face {
    font-family: "Magic Story";
    src: local("Magic Story"), local("Magic Story");
  }

  @font-face {
    font-family: "Espiritu";
    src: local("Espiritu"), local("Espiritu Regular");
  }

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

  body {
    background-color: var(--bg);
    color: var(--text);
    font-family: var(--font-display);
    min-height: 100vh;
    overflow-x: hidden;
    transition: background-color 0.4s, color 0.4s;
  }

  h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
  }

  p {
    font-family: var(--font-body);
  }

  /* NAV */
  nav {
    position: fixed; top: 0; left: 0; right: 0; z-index: 100;
    display: flex; justify-content: space-between; align-items: center;
    padding: 1.2rem 3rem;
    background: var(--nav-bg);
    border-bottom: 1px solid var(--border-a);
    backdrop-filter: blur(8px);
    transition: background 0.4s, border-color 0.4s;
  }

  .nav-left { display: flex; align-items: center; gap: 2.5rem; }

  .nav-logo {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 54px;
    height: 42px;
    text-decoration: none;
    cursor: pointer;
  }

  .nav-logo img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: contain;
  }

  .nav-links { display: flex; gap: 2.5rem; list-style: none; }

  .nav-links a {
    font-family: var(--font-display);
    font-size: 0.75rem; letter-spacing: 0.25em; text-transform: uppercase;
    color: var(--text-muted); text-decoration: none;
    transition: color 0.3s; cursor: pointer; border: none; background: none; padding: 0;
  }

  .nav-links a:hover, .nav-links a.active { color: var(--accent); }

  .theme-toggle {
    font-family: var(--font-display);
    font-size: 0.65rem; letter-spacing: 0.18em; text-transform: uppercase;
    color: var(--text-muted); background: none;
    padding: 0.35rem 0.9rem; cursor: pointer;
    transition: all 0.3s; display: flex; align-items: center; gap: 0.5rem;
  }

  .theme-toggle:hover { border-color: white; color: white; }

  /* PAGE SYSTEM */
  .page { display: none; min-height: 100vh; }
  .page.active { display: block; }

  /* SHARED */
  .section-divider {
    width: 100%; height: 3px;
    background: var(--accent);
    margin: 3rem 0; transition: background 0.4s;
  }

  .section-divider-spaced { margin-top: 4rem; }

  /* Vietnamese border strip, adapted from index.html pixel tile */
  .viet-strip {
    --pattern-red: #B03D40;
    --pattern-deep-red: #B03D40;
    --pattern-dark: #07305D;
    --pattern-pink: #87AA6D;
    --pattern-gold: #F3EFF0;
    --pattern-beige: #F3EFF0;
    --pattern-ink: #07305D;
    --pattern-scale: 0.34;
    --pattern-cell: calc(16px * var(--pattern-scale));
    width: 100%;
    min-height: 10px;
    overflow: hidden;
    transition: background 0.4s, border-color 0.4s;
    line-height: 0;
  }

  .page-wrapper > .viet-strip {
    width: 100vw;
    margin-left: calc(50% - 50vw);
    margin-bottom: -5rem;
  }

  .home-viet-strip {
    position: absolute;
    right: 0;
    bottom: 0px;
    left: 0;
  }

  .viet-strip-track {
    display: flex;
    min-width: 100%;
    width: max-content;
    justify-content: center;
    padding: 0px 0 0;
  }

  .viet-tile {
    flex: 0 0 auto;
    width: calc(238px * var(--pattern-scale));
    height: calc(238px * var(--pattern-scale));
    padding: calc(9px * var(--pattern-scale));
    background: var(--pattern-red);
    border: calc(5px * var(--pattern-scale)) solid var(--pattern-ink);
  }

  .viet-panel {
    position: relative;
    width: calc(210px * var(--pattern-scale));
    height: calc(210px * var(--pattern-scale));
    padding: calc(28px * var(--pattern-scale)) calc(27px * var(--pattern-scale));
    background: var(--pattern-dark);
    border: calc(5px * var(--pattern-scale)) solid var(--pattern-ink);
    box-shadow:
      inset 0 0 0 calc(4px * var(--pattern-scale)) var(--pattern-red),
      inset 0 0 0 calc(10px * var(--pattern-scale)) var(--pattern-dark),
      inset 0 0 0 calc(15px * var(--pattern-scale)) var(--pattern-gold),
      inset 0 0 0 calc(20px * var(--pattern-scale)) var(--pattern-beige),
      inset 0 0 0 calc(25px * var(--pattern-scale)) var(--pattern-ink);
  }

  .viet-field {
    position: relative;
    width: calc(var(--pattern-cell) * 9);
    height: calc(var(--pattern-cell) * 9);
    overflow: hidden;
    background: var(--pattern-dark);
    box-shadow: 0 0 0 calc(5px * var(--pattern-scale)) var(--pattern-ink);
  }

  .viet-star,
  .viet-flower,
  .viet-half-flower {
    position: absolute;
    width: calc(var(--pattern-cell) * 3);
    height: calc(var(--pattern-cell) * 3);
    transform: translate(-50%, -50%);
  }

  .viet-star::before,
  .viet-star::after,
  .viet-flower::before,
  .viet-flower::after,
  .viet-half-flower::before,
  .viet-half-flower::after {
    content: "";
    position: absolute;
    inset: 0;
  }

  .viet-star::before {
    background: var(--pattern-red);
    clip-path: polygon(
      33.333% 0, 66.667% 0,
      66.667% 16.667%, 83.333% 16.667%,
      83.333% 33.333%, 100% 33.333%,
      100% 66.667%, 83.333% 66.667%,
      83.333% 83.333%, 66.667% 83.333%,
      66.667% 100%, 33.333% 100%,
      33.333% 83.333%, 16.667% 83.333%,
      16.667% 66.667%, 0 66.667%,
      0 33.333%, 16.667% 33.333%,
      16.667% 16.667%, 33.333% 16.667%
    );
  }

  .viet-star::after {
    inset: var(--pattern-cell);
    background: var(--pattern-beige);
    border: calc(5px * var(--pattern-scale)) solid var(--pattern-red);
    box-shadow: inset 0 0 0 calc(5px * var(--pattern-scale)) var(--pattern-pink);
  }

  .viet-flower::before,
  .viet-half-flower::before {
    background: var(--pattern-pink);
    clip-path: polygon(
      33.333% 0, 66.667% 0,
      66.667% 33.333%, 100% 33.333%,
      100% 66.667%, 66.667% 66.667%,
      66.667% 100%, 33.333% 100%,
      33.333% 66.667%, 0 66.667%,
      0 33.333%, 33.333% 33.333%
    );
  }

  .viet-flower::after,
  .viet-half-flower::after {
    inset: calc(7px * var(--pattern-scale));
    background: var(--pattern-beige);
    clip-path: polygon(
      38% 0, 62% 0,
      62% 38%, 100% 38%,
      100% 62%, 62% 62%,
      62% 100%, 38% 100%,
      38% 62%, 0 62%,
      0 38%, 38% 38%
    );
  }

  .viet-s1 { left: calc(var(--pattern-cell) * 2.25); top: calc(var(--pattern-cell) * 2.15); }
  .viet-s2 { left: calc(var(--pattern-cell) * 6.95); top: calc(var(--pattern-cell) * 2.15); }
  .viet-s3 { left: calc(var(--pattern-cell) * 2.25); top: calc(var(--pattern-cell) * 6.9); }
  .viet-s4 { left: calc(var(--pattern-cell) * 6.95); top: calc(var(--pattern-cell) * 6.9); }

  .viet-c1 { left: 50%; top: calc(var(--pattern-cell) * 4.45); }
  .viet-c2 { left: 50%; top: calc(var(--pattern-cell) * -0.08); }
  .viet-c3 { left: 50%; top: calc(100% + var(--pattern-cell) * 0.08); }
  .viet-c4 { left: calc(var(--pattern-cell) * -0.1); top: 50%; }
  .viet-c5 { left: calc(100% + var(--pattern-cell) * 0.1); top: 50%; }

  /* HOME */
  #home {
    flex-direction: column; align-items: center;
    justify-content: center; min-height: 100vh;
    position: relative; overflow: hidden; padding-top: 80px;
  }

  #home.active { display: flex; }

  #home::before {
    content: '';
    position: absolute; inset: 0;
    background: transparent;
    pointer-events: none;
  }

  [data-theme="light"] #home::before {
    background: transparent;
  }

  .egy-frame {
    position: absolute; inset: 80px 40px 20px; pointer-events: none;
    border: 1px solid var(--border-a); opacity: 0.25;
    transition: border-color 0.4s;
  }

  .home-logo {
    width: clamp(140px, 20vw, 230px);
    height: auto;
    display: block;
    margin: 0 auto 1.4rem;
    filter: drop-shadow(0 18px 28px rgba(0,0,0,0.28));
  }

  .home-eyebrow {
    font-family: var(--font-display); font-size: 0.7rem;
    letter-spacing: 0.4em; text-transform: uppercase;
    color: var(--accent); margin-bottom: 2.5rem;
  }

  .home-name {
    font-family: var(--font-name);
    font-size: clamp(2rem, 5vw, 3.5rem); color: var(--text);
    text-align: center; line-height: 1.2; margin-bottom: 0.6rem;
    transition: color 0.4s;
  }

  .home-name span { color: var(--accent); }

  .home-tagline {
    font-family: var(--font-body); font-style: italic;
    font-size: 1.2rem; color: var(--text-muted);
    text-align: center; margin-bottom: 2.5rem; letter-spacing: 0.05em;
    transition: color 0.4s;
  }

  .home-ornament { display: flex; align-items: center; gap: 1rem; margin-bottom: 3rem; }

  .home-ornament .line {
    width: 80px; height: 1px;
    background: var(--accent);
  }

  .home-ornament .line.rev { background: var(--accent); }
  .home-ornament .orn-mark { font-family: var(--font-display); color: var(--accent); font-size: 0.9rem; }

  .nav-btn-group { display: flex; gap: 1rem; flex-wrap: wrap; justify-content: center; }

  .nav-btn {
    font-family: var(--font-display); font-size: 0.7rem;
    letter-spacing: 0.3em; text-transform: uppercase;
    padding: 0.8rem 2rem; border: 1px solid; cursor: pointer;
    transition: all 0.3s; display: inline-block;
  }

  .nav-btn-primary {
    border-color: var(--accent); color: var(--bg); background: var(--accent);
  }

  .nav-btn-primary:hover {
    background: var(--accent-lt); border-color: var(--accent-lt);
    transform: translateY(-2px); box-shadow: 0 8px 20px var(--shadow);
  }

  .nav-btn-secondary {
    border-color: var(--border-a-s); color: var(--accent); background: transparent;
  }

  .nav-btn-secondary:hover {
    background: var(--strip-bg); border-color: var(--accent); transform: translateY(-2px);
  }

  /* INNER PAGES */
  .page-wrapper { max-width: 1100px; margin: 0 auto; padding: 120px 3rem 5rem; }

  .page-header { text-align: center; margin-bottom: 4rem; }

  .page-header-label {
    font-family: var(--font-display); font-size: 0.65rem;
    letter-spacing: 0.5em; text-transform: uppercase;
    color: var(--accent); display: block; margin-bottom: 0.8rem;
  }

  .page-title {
    font-family: var(--font-display);
    font-size: clamp(1.8rem, 4vw, 3rem); color: var(--text);
    line-height: 1.2; margin-bottom: 1rem; transition: color 0.4s;
  }

  .page-title span { color: var(--accent); }

  .title-underline { display: flex; align-items: center; justify-content: center; gap: 0.8rem; margin-top: 1rem; }
  .title-underline .bar { height: 1px; width: 60px; background: var(--accent-dim); }
  .title-underline .diamond { width: 8px; height: 8px; background: var(--accent); transform: rotate(45deg); }

  /* ABOUT */
  .about-grid { display: grid; grid-template-columns: 1fr 1.6fr; gap: 4rem; align-items: start; margin-bottom: 4rem; }

  .about-portrait-wrap { position: relative; }

  .about-portrait-inner {
    background: var(--bg-mid);
    border: 2px solid var(--accent-dim);
    aspect-ratio: 3/4;
    display: flex; align-items: center; justify-content: center;
    position: relative; overflow: hidden;
    transition: background 0.4s, border-color 0.4s;
  }

  [data-theme="dark"] .about-portrait-inner {
    border-color: white;
  }

  .profile-photo {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: cover;
    position: relative;
    z-index: 1;
  }

  .about-portrait-inner::before {
    content: ''; position: absolute; inset: 8px;
    border: 1px solid var(--border-a); pointer-events: none;
  }

  [data-theme="dark"] .about-portrait-inner::before {
    border-color: white;
  }

  .portrait-geo {
    position: absolute; inset: 0; opacity: 0.06;
    background: var(--accent);
  }

  .portrait-initials {
    font-family: var(--font-name); font-size: 3.5rem;
    color: var(--accent); opacity: 0.4; letter-spacing: 0.1em; z-index: 1;
  }

  .portrait-label {
    position: absolute; bottom: 0; left: 0; right: 0; padding: 1rem;
    background: var(--portrait-overlay);
    font-family: var(--font-display); font-size: 0.8rem;
    color: white; text-align: center; letter-spacing: 0.1em;
    transition: background 0.4s;
  }

  .portrait-side-deco {
    position: absolute; right: -20px; top: 0; bottom: 0; width: 18px;
    display: flex; flex-direction: column; align-items: center; justify-content: space-around;
    color: var(--accent-dim); font-size: 0.9rem; opacity: 0.6;
  }

  .about-text h3 {
    font-family: var(--font-display); font-size: 1rem;
    color: var(--accent); margin-bottom: 1rem; letter-spacing: 0.08em;
  }

  .section-subheading { margin-top: 1.5rem; }

  .about-text p {
    font-family: var(--font-body);
    font-size: 1.05rem; line-height: 1.9; color: var(--text-muted);
    margin-bottom: 1.5rem; transition: color 0.4s;
  }

  .about-text p em { color: var(--teal2-lt); font-style: italic; }

  .skills-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(130px, 1fr)); gap: 0.6rem; margin-top: 2rem; }

  .skill-tag {
    background: var(--strip-bg); border: 1px solid var(--border-a);
    color: var(--text-muted); font-family: var(--font-display);
    font-size: 0.65rem; letter-spacing: 0.2em; text-transform: uppercase;
    padding: 0.5rem 0.8rem; text-align: center; transition: all 0.3s;
  }

  .skill-tag:hover { border-color: var(--accent); color: var(--accent); }

  .stats-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; margin: 3rem 0; }

  .stat-box {
    text-align: center; padding: 1.5rem 1rem;
    border: 1px solid var(--border-a); background: var(--strip-bg);
    position: relative; transition: background 0.4s, border-color 0.4s;
  }

  .stat-box::before, .stat-box::after {
    content: ''; position: absolute; width: 12px; height: 12px;
    border-color: var(--accent-dim); border-style: solid; opacity: 0.5;
  }

  .stat-box::before { top: -1px; left: -1px; border-width: 2px 0 0 2px; }
  .stat-box::after  { bottom: -1px; right: -1px; border-width: 0 2px 2px 0; }

  .stat-num { font-family: var(--font-display); font-size: 2rem; color: var(--accent); display: block; }

  .stat-label {
    font-family: var(--font-display); font-size: 0.6rem;
    letter-spacing: 0.3em; text-transform: uppercase;
    color: var(--text-muted); margin-top: 0.3rem; display: block; transition: color 0.4s;
  }

  /* PROJECTS */
  .projects-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 2rem; margin-top: 1rem; }

  .project-card {
    position: relative; border: 1px solid var(--border-a); background: var(--bg-card);
    overflow: hidden; transition: transform 0.3s, box-shadow 0.3s, background 0.4s, border-color 0.4s; cursor: default;
  }

  .project-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 20px 50px var(--shadow), 0 0 20px rgba(221,185,126,0.12);
    border-color: var(--border-a-s);
  }

  .project-card-top { height: 8px; }
  .project-card-top.c1 { background: var(--accent-dim); }
  .project-card-top.c2 { background: var(--teal2); }
  .project-card-top.c3 { background: var(--lapis); }

  .project-card-body { padding: 1.8rem; }

  .project-tag {
    font-family: var(--font-display); font-size: 0.6rem;
    letter-spacing: 0.3em; text-transform: uppercase;
    color: var(--teal2-lt); display: block; margin-bottom: 0.8rem;
  }

  .project-title {
    font-family: var(--font-display); font-size: 1rem;
    color: var(--text); margin-bottom: 0.55rem; line-height: 1.4; transition: color 0.4s;
  }

  .project-date {
    display: block;
    margin-bottom: 1rem;
    color: var(--text-muted);
    font-family: var(--font-display);
    font-size: 0.62rem;
    letter-spacing: 0.22em;
    text-transform: uppercase;
  }

  .project-desc {
    font-family: var(--font-body);
    font-size: 0.95rem; line-height: 1.7; color: var(--text-muted);
    margin-bottom: 1.5rem; transition: color 0.4s;
  }

  .project-tech { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-bottom: 1.2rem; }

  .tech-pill {
    font-family: var(--font-display); font-size: 0.58rem;
    letter-spacing: 0.15em; text-transform: uppercase;
    padding: 0.3rem 0.6rem;
    background: rgba(135,170,109,0.14); border: 1px solid rgba(135,170,109,0.38);
    color: var(--teal-light); transition: all 0.4s;
  }

  .project-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.65rem 1rem;
  }

  .project-link {
    font-family: var(--font-display); font-size: 0.65rem;
    letter-spacing: 0.2em; text-transform: uppercase;
    color: var(--accent); text-decoration: none;
    display: inline-flex; align-items: center; gap: 0.4rem; transition: gap 0.3s;
  }

  .project-link:hover { gap: 0.8rem; }

  .project-card-deco {
    position: absolute; bottom: 10px; right: 14px;
    font-size: 2.5rem; opacity: 0.05; user-select: none; pointer-events: none;
  }

  /* ARTWORK */
  .artwork-intro {
    font-family: var(--font-body);
    text-align: center; max-width: 600px; margin: 0 auto 3rem;
    font-style: italic; font-size: 1.1rem; color: var(--text-muted);
    line-height: 1.8; transition: color 0.4s;
  }

  .artwork-gallery { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.2rem; }

  .artwork-item {
    position: relative; overflow: hidden; border: 1px solid var(--border-a);
    cursor: pointer; transition: border-color 0.4s, transform 0.3s, box-shadow 0.3s;
    background: var(--bg-mid);
  }

  .artwork-item:hover {
    border-color: var(--border-a-s); transform: scale(1.01); z-index: 2;
    box-shadow: 0 10px 40px var(--shadow);
  }

  .artwork-item.tall { grid-row: span 2; }
  .artwork-item.wide { grid-column: span 2; }

  .artwork-placeholder {
    width: 100%; height: 100%; min-height: 200px;
    display: flex; align-items: center; justify-content: center;
    position: relative; overflow: hidden;
  }

  .artwork-placeholder-tall { min-height: 420px; }

  .artwork-photo {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: cover;
  }

  .artwork-placeholder.p1,
  .artwork-placeholder.p2,
  .artwork-placeholder.p3,
  .artwork-placeholder.p4,
  .artwork-placeholder.p5,
  .artwork-placeholder.p6 {
    background: var(--bg-mid);
  }

  .artwork-label {
    position: absolute; bottom: 0; left: 0; right: 0;
    padding: 1.5rem 1rem 0.8rem;
    background: var(--portrait-overlay);
    transform: translateY(100%); transition: transform 0.3s;
  }

  .artwork-item:hover .artwork-label { transform: translateY(0); }

  .artwork-label h4 { font-family: var(--font-display); font-size: 0.8rem; color: var(--accent); margin-bottom: 0.2rem; }
  .artwork-label p { font-family: var(--font-display); font-size: 0.6rem; letter-spacing: 0.2em; text-transform: uppercase; color: var(--text-muted); }

  .artwork-corner {
    position: absolute; top: 8px; right: 8px; width: 20px; height: 20px;
    border-top: 1px solid var(--border-a-s); border-right: 1px solid var(--border-a-s);
    pointer-events: none; transition: border-color 0.4s;
  }

  /* CONTACT */
  .contact-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 5rem; align-items: start; }

  .contact-info h3 { font-family: var(--font-display); font-size: 1rem; color: var(--accent); margin-bottom: 1.5rem; }

  .contact-info > p { font-family: var(--font-body); font-size: 1rem; line-height: 1.8; color: var(--text-muted); margin-bottom: 2rem; font-style: italic; transition: color 0.4s; }


  .contact-visual img {
    display: block;
    width: 100%;
    height: auto;
  }

  .contact-socials {
    display: flex;
    gap: 0.8rem;
    margin-top: 1rem;
  }

  .contact-social {
    width: 70px;
    height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--accent-dim);
    color: var(--accent);
    text-decoration: none;
    font-family: var(--font-display);
    font-size: 0.76rem;
    letter-spacing: 0.08em;
    transition: border-color 0.3s, color 0.3s, transform 0.3s;
  }

  .contact-social:hover {
    border-color: var(--accent);
    color: var(--accent-lt);
    transform: translateY(-2px);
  }

  .contact-detail {
    display: flex; align-items: center; gap: 1rem; margin-bottom: 1.2rem;
    padding: 0.8rem; border: 1px solid var(--border-a); background: var(--strip-bg);
    transition: all 0.3s;
  }

  [data-theme="light"] .contact-detail {
    background: white;
  }

  .contact-detail:hover { border-color: var(--border-a-s); }

  .contact-icon {
    width: 36px; height: 36px; border: 1px solid var(--accent-dim);
    display: flex; align-items: center; justify-content: center;
    font-size: 0.9rem; color: var(--accent); font-family: var(--font-display);
    flex-shrink: 0; transition: border-color 0.4s, color 0.4s;
  }

  .contact-detail-text { font-family: var(--font-display); font-size: 0.7rem; letter-spacing: 0.1em; color: var(--text-muted); transition: color 0.4s; }
  .contact-detail-label { font-size: 0.55rem; letter-spacing: 0.3em; text-transform: uppercase; color: var(--accent-dim); display: block; margin-bottom: 0.2rem; }

  .contact-form { display: flex; flex-direction: column; gap: 1.2rem; }

  .form-label { font-family: var(--font-display); font-size: 0.6rem; letter-spacing: 0.3em; text-transform: uppercase; color: var(--accent-dim); display: block; margin-bottom: 0.4rem; }

  .form-input, .form-textarea {
    width: 100%; background: var(--strip-bg); border: 1px solid var(--border-a);
    color: var(--text); font-family: var(--font-body); font-size: 1rem;
    padding: 0.8rem 1rem; outline: none;
    transition: border-color 0.3s, background 0.4s, color 0.4s;
  }

  [data-theme="light"] .form-input,
  [data-theme="light"] .form-textarea {
    background: white;
  }

  .form-input:focus, .form-textarea:focus { border-color: var(--accent); }
  .form-input::placeholder, .form-textarea::placeholder { color: var(--text-muted); opacity: 0.5; font-style: italic; }
  .form-textarea { min-height: 140px; resize: vertical; }

  .form-submit {
    font-family: var(--font-display); font-size: 0.7rem;
    letter-spacing: 0.3em; text-transform: uppercase;
    padding: 1rem 2.5rem; background: var(--accent); color: var(--bg);
    border: none; cursor: pointer; transition: all 0.3s; align-self: flex-start;
  }

  .form-submit:hover { background: var(--accent-lt); transform: translateY(-2px); box-shadow: 0 8px 25px var(--shadow); }

  .form-message {
    font-family: var(--font-body);
    display: none;
    color: var(--accent);
    font-size: 0.9rem;
    font-style: italic;
  }

  footer {
    text-align: center; padding: 2rem;
    border-top: 1px solid var(--border-a);
    font-family: var(--font-display); font-size: 0.6rem;
    letter-spacing: 0.3em; text-transform: uppercase;
    color: var(--accent-dim); transition: border-color 0.4s, color 0.4s;
  }

  @keyframes fadeInUp { from { opacity: 0; transform: translateY(28px); } to { opacity: 1; transform: translateY(0); } }
  .fade-in { animation: fadeInUp 0.8s ease forwards; }
  .fade-in-d1 { animation-delay: 0.1s; opacity: 0; }
  .fade-in-d2 { animation-delay: 0.25s; opacity: 0; }
  .fade-in-d3 { animation-delay: 0.4s; opacity: 0; }
  .fade-in-d4 { animation-delay: 0.55s; opacity: 0; }

  ::-webkit-scrollbar { width: 5px; }
  ::-webkit-scrollbar-track { background: var(--bg); }
  ::-webkit-scrollbar-thumb { background: var(--accent-dim); }

  @media (max-width: 768px) {
    nav { padding: 1rem 1.5rem; }
    .nav-links { gap: 1.2rem; }
    .nav-left { gap: 1.5rem; }
    .page-wrapper { padding: 100px 1.5rem 3rem; }
    .page-wrapper > .viet-strip { margin-bottom: -3rem; }
    .about-grid { grid-template-columns: 1fr; gap: 2rem; }
    .contact-layout { grid-template-columns: 1fr; gap: 3rem; }
    .artwork-gallery { grid-template-columns: 1fr 1fr; }
    .artwork-item.wide { grid-column: span 2; }
    .projects-grid { grid-template-columns: 1fr; }
  }