/* ============================================================
   VÕ KHẮC TÂM — Portfolio
   Metaphor: NETWORK OPERATIONS CENTER (phòng điều khiển)
   Glass + light: giấy kỹ thuật, kính trắng mờ, nét mực xanh.
   Khong dung mesh gradient tim — do la dau hieu AI slop.
   ============================================================ */

:root {
  /* --- nen: giay ky thuat sang --- */
  --ink:      #EEF1F6;
  --ink-2:    #F6F8FB;
  --ink-3:    #FFFFFF;
  --ink-4:    #E7ECF3;

  /* --- line: mau thuy tinh truong pho quang --- */
  --line:     rgba(15, 32, 51, .10);
  --line-2:   rgba(15, 32, 51, .17);

  /* --- trang thai: deu doc ben tren nen sang nen can dam hon --- */
  --mint:     #00704C;
  --mint-dim: rgba(0, 135, 90, .16);
  --amber:    #9A5708;
  --blue:     #1B5FCC;

  /* --- chu --- */
  --text:     #0E1A26;
  --muted:    #55677C;
  --faint:    #5A6B80;

  /* --- kinh mo --- */
  --glass:        rgba(255, 255, 255, .72);
  --glass-strong: rgba(255, 255, 255, .86);
  --glass-weak:   rgba(255, 255, 255, .58);
  --blur:         blur(18px) saturate(165%);

  /* --- font --- */
  --display: 'Space Grotesk', system-ui, sans-serif;
  --body:    'Be Vietnam Pro', system-ui, sans-serif;
  --mono:    'JetBrains Mono', ui-monospace, monospace;

  --rail: 64px;
  --ease: cubic-bezier(.16, 1, .3, 1);
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  /* overflow-x phai nam tren html, khong phai body. Dat tren body se lam
     body khong con la vung scroll va window.scrollTo() khong con hoat dong —
     phan content duoi viewport (section, footer) se khong bao gio chiem. */
  overflow-x: hidden;
}

body {
  background: var(--ink);
  color: var(--text);
  font-family: var(--body);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

/* nen luoi + khop sang duoc day qua mau nen */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(15, 32, 51, .085) 1px, transparent 1px),
    linear-gradient(90deg, rgba(15, 32, 51, .085) 1px, transparent 1px),
    /* vach cham dau — dung de canh luoi khi keo gian */
    linear-gradient(rgba(15, 32, 51, .16) 1px, transparent 1px),
    linear-gradient(90deg, rgba(15, 32, 51, .16) 1px, transparent 1px);
  background-size: 64px 64px, 64px 64px, 320px 320px, 320px 320px;
  mask-image: radial-gradient(ellipse 100% 80% at 50% 0%, #000 15%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 100% 80% at 50% 0%, #000 15%, transparent 80%);
}

/* doc sang cham, phai du khop duoi lop kinh de tao chieu sau */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    /* vung TOI nhat — moi thu kienh trang mo deu noi bat len tren nen nay */
    radial-gradient(ellipse 55% 42% at 8% 12%,   rgba(15, 32, 51, .13), transparent 60%),
    radial-gradient(ellipse 48% 38% at 92% 26%,  rgba(15, 32, 51, .11), transparent 60%),
    radial-gradient(ellipse 60% 44% at 50% 100%, rgba(15, 32, 51, .10), transparent 62%),
    radial-gradient(ellipse 34% 30% at 72% 62%,  rgba(15, 32, 51, .085), transparent 62%),
    /* vung sang nhe de canh bang */
    radial-gradient(ellipse 46% 34% at 26% 46%,  rgba(255, 255, 255, .70), transparent 64%),
    radial-gradient(ellipse 40% 32% at 64% 80%,  rgba(255, 255, 255, .55), transparent 64%);
}

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

/* ---------- thanh cuộn ---------- */
::-webkit-scrollbar { width: 9px; }
::-webkit-scrollbar-track { background: rgba(15,32,51,.05); }
::-webkit-scrollbar-thumb { background: var(--line-2); border-radius: 0; }
::-webkit-scrollbar-thumb:hover { background: var(--mint); }

/* ============================================================
   RAIL — chỉ mục dọc
   ============================================================ */
.rail {
  position: fixed;
  left: 0; top: 0; bottom: 0;
  width: var(--rail);
  z-index: 60;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  padding: 22px 0;
  background: var(--glass-strong);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border-right: 1px solid var(--line);
  box-shadow: 1px 0 0 rgba(255,255,255,.75) inset, 1px 0 22px -6px rgba(15,32,51,.16);
}

.rail__mark {
  width: 26px; height: 26px;
  display: grid; place-items: center;
  border: 1.5px solid var(--mint);
  font-family: var(--mono);
  font-size: 11px; font-weight: 700;
  color: var(--mint);
  text-decoration: none;
}

.rail__nav { display: flex; flex-direction: column; gap: 4px; }

.rail__link {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px; height: 40px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .06em;
  color: var(--faint);
  text-decoration: none;
  transition: color .25s var(--ease);
}
.rail__link::before {
  content: '';
  position: absolute;
  left: 0; top: 50%;
  width: 2px; height: 0;
  background: var(--mint);
  transform: translateY(-50%);
  transition: height .3s var(--ease);
}
.rail__link:hover { color: var(--muted); }
.rail__link.is-active { color: var(--mint); }
.rail__link.is-active::before { height: 20px; }

.rail__tick {
  width: 1px; height: 54px;
  background: linear-gradient(var(--line-2), transparent);
  overflow: hidden;
}
.rail__tick i {
  display: block;
  width: 100%; height: 50%;
  background: var(--mint);
  animation: tick 2.4s var(--ease) infinite;
}
@keyframes tick {
  0%   { transform: translateY(-100%); }
  100% { transform: translateY(200%); }
}

/* nhãn tooltip khi hover */
.rail__link::after {
  content: attr(data-label);
  position: absolute;
  left: calc(100% + 10px);
  padding: 5px 10px;
  background: var(--ink-4);
  border: 1px solid var(--line-2);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .08em;
  color: var(--text);
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transform: translateX(-6px);
  transition: opacity .2s, transform .2s var(--ease);
}
.rail__link:hover::after { opacity: 1; transform: none; }

/* ============================================================
   LAYOUT
   ============================================================ */
.shell { margin-left: var(--rail); position: relative; z-index: 1; }

.wrap { max-width: 1180px; margin: 0 auto; padding: 0 clamp(22px, 5vw, 68px); }

section { padding: clamp(80px, 11vw, 150px) 0; position: relative; }

/* ---------- tiêu đề mục ---------- */
.sec-head {
  display: flex;
  align-items: baseline;
  gap: 16px;
  margin-bottom: 14px;
}
.sec-num {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--mint);
  letter-spacing: .1em;
}
.sec-title {
  font-family: var(--display);
  font-size: clamp(26px, 3.6vw, 40px);
  font-weight: 700;
  letter-spacing: -.02em;
  line-height: 1.1;
}
.sec-rule {
  height: 1px;
  background: linear-gradient(90deg, var(--line-2), rgba(15,32,51,0));
  margin-bottom: 52px;
}
.sec-note {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--faint);
  text-transform: uppercase;
  margin-bottom: 10px;
}

/* ============================================================
   HERO
   ============================================================ */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  padding: clamp(90px, 12vh, 130px) 0 80px;
}

#scene {
  position: absolute;
  inset: 0;
  z-index: 0;
  /* clip o scene, khong clip o .hero — line-height .92 cua hero__name se
     lam overflow:hidden cat descender cua chu */
  overflow: hidden;
}
#scene canvas { display: block; }

/* vệt sáng quét ngang */
.hero__scan {
  position: absolute;
  left: 0; right: 0;
  height: 1px;
  z-index: 1;
  background: linear-gradient(90deg, transparent, var(--mint), transparent);
  opacity: .22;
  animation: scan 7s ease-in-out infinite;
  pointer-events: none;
}
@keyframes scan {
  0%, 100% { top: 12%; opacity: 0; }
  50%      { top: 88%; opacity: .4; }
}

.hero__inner { position: relative; z-index: 2; }

/* ---------- lưới hero: chữ + thẻ ID ảnh ---------- */
.hero__grid {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: clamp(28px, 5vw, 64px);
  align-items: center;
}

/* thẻ định danh — khung vuông có ngoặc góc, không phải avatar tròn */
.idcard {
  position: relative;
  width: clamp(210px, 22vw, 268px);
  flex-shrink: 0;
  border: 1px solid var(--line-2);
  background: var(--glass);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  box-shadow: 0 20px 44px -20px rgba(15,32,51,.40),
              0 1px 0 rgba(255,255,255,.8) inset;
  padding: 10px;
}
/* ngoặc góc 4 phía */
.idcard::before,
.idcard::after,
.idcard > i:first-child,
.idcard > i:last-child {
  content: '';
  position: absolute;
  width: 13px; height: 13px;
  border: 1.5px solid var(--mint);
  pointer-events: none;
}
.idcard::before { top: -1px;    left: -1px;  border-right: 0; border-bottom: 0; }
.idcard::after  { bottom: -1px; right: -1px; border-left: 0;  border-top: 0; }
.idcard > i:first-child { top: -1px;    right: -1px; border-left: 0;  border-bottom: 0; }
.idcard > i:last-child  { bottom: -1px; left: -1px;  border-right: 0; border-top: 0; }

.idcard__shot {
  position: relative;
  aspect-ratio: 3 / 4;
  overflow: hidden;
  background: rgba(15,32,51,.06);
  box-shadow: 0 1px 0 rgba(255,255,255,.55) inset;
}
.idcard__shot img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 22%;
  filter: contrast(1.02) saturate(1.02);
  transition: filter .5s var(--ease), transform .6s var(--ease);
}
.idcard:hover .idcard__shot img { filter: contrast(1.06) saturate(1.1); transform: scale(1.035); }

/* vệt quét ngang trên ảnh */
.idcard__shot::after {
  content: '';
  position: absolute;
  left: 0; right: 0;
  height: 34%;
  background: linear-gradient(transparent, rgba(0, 112, 76, .13), transparent);
  animation: idscan 5.5s var(--ease) infinite;
  pointer-events: none;
}
@keyframes idscan {
  0%, 100% { top: -34%; }
  50%      { top: 100%; }
}

.idcard__meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 9px 3px 1px;
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: .12em;
  color: var(--faint);
  text-transform: uppercase;
}
.idcard__meta b { color: var(--mint); font-weight: 500; }

.hero__status {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 6px 13px;
  border: 1px solid var(--line-2);
  background: var(--glass);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--muted);
  text-transform: uppercase;
  margin-bottom: 30px;
}
.dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--mint);
  box-shadow: 0 0 0 0 rgba(0, 229, 160, .6);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%   { box-shadow: 0 0 0 0 rgba(0, 229, 160, .55); }
  70%  { box-shadow: 0 0 0 9px rgba(0, 229, 160, 0); }
  100% { box-shadow: 0 0 0 0 rgba(0, 229, 160, 0); }
}

.hero__name {
  font-family: var(--display);
  font-size: clamp(46px, 9.5vw, 128px);
  font-weight: 700;
  line-height: 1.02;
  letter-spacing: -.045em;
  text-transform: uppercase;
  margin-bottom: 6px;
}
.hero__name span { display: block; }
.hero__name .l2 {
  color: transparent;
  -webkit-text-stroke: 1.4px var(--mint);
}

.hero__role {
  font-family: var(--mono);
  font-size: clamp(11px, 1.5vw, 13px);
  letter-spacing: .22em;
  color: var(--amber);
  text-transform: uppercase;
  margin: 22px 0 30px;
}

.hero__desc {
  max-width: 46ch;
  font-size: clamp(15px, 1.7vw, 17px);
  color: var(--muted);
  margin-bottom: 42px;
}
.hero__desc strong { color: var(--text); font-weight: 600; }

/* ---------- hàng chỉ số ---------- */
.stats {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(28px, 6vw, 66px);
  padding-top: 30px;
  border-top: 1px solid var(--line);
  max-width: 720px;
}
.stat b {
  display: block;
  font-family: var(--display);
  font-size: clamp(30px, 4.2vw, 46px);
  font-weight: 700;
  letter-spacing: -.03em;
  line-height: 1;
  color: var(--mint);
}
.stat span {
  display: block;
  margin-top: 8px;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .13em;
  color: var(--faint);
  text-transform: uppercase;
}

/* ---------- nút ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 24px;
  border: 1px solid var(--mint);
  background: var(--mint);
  color: var(--ink);
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  text-decoration: none;
  cursor: pointer;
  transition: transform .2s var(--ease), box-shadow .25s var(--ease);
  box-shadow: 0 8px 18px -8px rgba(0, 112, 76, .55), 0 1px 0 rgba(255,255,255,.28) inset;
}
.btn:hover  { transform: translateY(-2px); box-shadow: 0 14px 26px -10px rgba(0, 112, 76, .6); }
.btn:active { transform: translateY(0); box-shadow: 0 4px 10px -6px rgba(0, 112, 76, .5); }

.btn--ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--line-2);
  background: var(--glass);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 8px 18px -12px rgba(15,32,51,.3);
}
.btn--ghost:hover { border-color: var(--mint); color: var(--mint); }

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

/* cuộn xuống */
.scroll-cue {
  position: absolute;
  left: 50%; bottom: 26px;
  z-index: 2;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: .2em;
  color: var(--faint);
  text-transform: uppercase;
}
.scroll-cue i {
  width: 1px; height: 34px;
  background: linear-gradient(var(--mint), transparent);
  animation: cue 2s ease-in-out infinite;
}
@keyframes cue {
  0%, 100% { opacity: .25; transform: scaleY(.5); transform-origin: top; }
  50%      { opacity: 1;   transform: scaleY(1);  transform-origin: top; }
}

/* ============================================================
   HỒ SƠ
   ============================================================ */
.profile {
  display: grid;
  grid-template-columns: 1.15fr .85fr;
  gap: clamp(34px, 6vw, 76px);
  align-items: start;
}

.card {
  border: 1px solid var(--line);
  background: var(--glass);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  box-shadow: 0 18px 42px -22px rgba(15,32,51,.38),
              0 1px 0 rgba(255,255,255,.75) inset;
  padding: clamp(24px, 3vw, 34px);
  position: relative;
}
.card::before {
  content: '';
  position: absolute;
  top: -1px; left: -1px;
  width: 34px; height: 2px;
  background: var(--mint);
}
/* lệch bố cục: khối thứ hai đẩy xuống */
.card--offset { margin-top: 44px; }

.card h3 {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .16em;
  color: var(--mint);
  text-transform: uppercase;
  margin-bottom: 18px;
}

.profile__text p { color: var(--muted); margin-bottom: 15px; }
.profile__text p:last-child { margin-bottom: 0; }

.kv { display: grid; gap: 0; }
.kv__row {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 0;
  border-bottom: 1px dashed var(--line);
}
.kv__row:last-child { border-bottom: 0; }
.kv__k {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .1em;
  color: var(--faint);
  min-width: 84px;
  text-transform: uppercase;
}
.kv__v { font-size: 14.5px; color: var(--text); word-break: break-word; }
.kv__v a { color: var(--mint); text-decoration: none; border-bottom: 1px solid rgba(0, 229, 160, .3); }
.kv__v a:hover { border-bottom-color: var(--mint); }

/* ============================================================
   KINH NGHIỆM — timeline lệch
   ============================================================ */
.jobs { display: grid; gap: 26px; }

.job {
  display: grid;
  grid-template-columns: 132px 1fr;
  gap: clamp(20px, 4vw, 48px);
  padding: 30px 0;
  border-top: 1px solid var(--line);
  position: relative;
  transition: background .3s var(--ease);
}
.job:hover { background: var(--glass-weak); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px); }
.job:hover::after {
  content: '';
  position: absolute;
  left: 0; top: -1px;
  width: 100%; height: 1px;
  background: var(--mint);
}

.job__meta { padding-top: 3px; }
.job__yr {
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--mint);
  letter-spacing: .04em;
}
.job__tag {
  display: inline-block;
  margin-top: 9px;
  padding: 3px 8px;
  border: 1px solid var(--line-2);
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: .12em;
  color: var(--muted);
  text-transform: uppercase;
}

.job__body h4 {
  font-family: var(--display);
  font-size: clamp(20px, 2.6vw, 27px);
  font-weight: 700;
  letter-spacing: -.02em;
  line-height: 1.2;
  margin-bottom: 5px;
}
.job__co {
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--amber);
  margin-bottom: 20px;
  letter-spacing: .03em;
}

.job__list { list-style: none; display: grid; gap: 11px; }
.job__list li {
  position: relative;
  padding-left: 24px;
  font-size: 14.5px;
  color: var(--muted);
  line-height: 1.6;
}
.job__list li::before {
  content: '';
  position: absolute;
  left: 0; top: 9px;
  width: 9px; height: 1px;
  background: var(--mint);
}
.job__list li strong { color: var(--text); font-weight: 600; }

/* ============================================================
   KỸ NĂG — thanh tín hiệu
   ============================================================ */
.skills {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: 2px;
  overflow: hidden;
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
}
.skill {
  background: var(--glass-weak);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  padding: 28px 26px;
  transition: background .3s var(--ease);
  position: relative;
}
.skill:hover { background: var(--glass); }

.skill__id {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--mint);
  letter-spacing: .1em;
  margin-bottom: 14px;
}
.skill h4 {
  font-family: var(--display);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -.01em;
  margin-bottom: 11px;
}
.skill p {
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 20px;
  line-height: 1.6;
}

/* tín hiệu 5 ô */
.meter { display: flex; gap: 4px; }
.meter i {
  flex: 1;
  height: 4px;
  background: rgba(15, 32, 51, .13);
}
.meter i.on { background: var(--mint); }
.meter i.on:nth-child(4) { background: var(--amber); }
.meter i.on:nth-child(5) { background: var(--blue); }

/* ---------- chips ngôn ngữ ---------- */
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 6px; }
.chip {
  padding: 6px 13px;
  background: var(--glass-weak);
  border: 1px solid var(--line-2);
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--muted);
  transition: all .22s var(--ease);
}
.chip:hover {
  border-color: var(--mint);
  color: var(--mint);
  transform: translateY(-2px);
}

/* ============================================================
   DỰ ÁN
   ============================================================ */
.works {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 22px;
}

.work {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 250px;
  padding: 28px 26px;
  border: 1px solid var(--line);
  background: var(--glass);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  box-shadow: 0 18px 38px -22px rgba(15,32,51,.36),
              0 1px 0 rgba(255,255,255,.72) inset;
  overflow: hidden;
  transition: border-color .3s var(--ease), transform .3s var(--ease);
}
/* vệt nền chạy khi hover */
.work::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0, 112, 76, .11), transparent 58%);
  opacity: 0;
  transition: opacity .35s var(--ease);
}
.work:hover { border-color: var(--mint); transform: translateY(-5px); }
.work:hover::before { opacity: 1; }

.work__n {
  font-family: var(--mono);
  font-size: 30px;
  font-weight: 700;
  color: rgba(15, 32, 51, .20);
  line-height: 1;
  margin-bottom: 18px;
  transition: color .3s var(--ease);
}
.work:hover .work__n { color: var(--mint); }

.work h4 {
  position: relative;
  font-family: var(--display);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -.015em;
  margin-bottom: 9px;
}
.work p {
  position: relative;
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 20px;
  flex: 1;
}
.work__foot {
  position: relative;
  display: flex;
  gap: 7px;
  flex-wrap: wrap;
}
.work__foot span {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .08em;
  color: var(--muted);
  padding: 3px 8px;
  background: var(--glass-weak);
  border: 1px solid var(--line);
}

/* ============================================================
   TRỢ LÝ AI — bảng điều khiển
   ============================================================ */
.ai {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: clamp(28px, 5vw, 60px);
  align-items: start;
}

.ai__intro h3 {
  font-family: var(--display);
  font-size: clamp(24px, 3.2vw, 34px);
  font-weight: 700;
  letter-spacing: -.025em;
  line-height: 1.16;
  margin-bottom: 18px;
}
.ai__intro p { color: var(--muted); margin-bottom: 18px; max-width: 52ch; }

.ai__list { list-style: none; display: grid; gap: 13px; margin-top: 30px; }
.ai__list li {
  display: flex;
  gap: 13px;
  font-size: 14.5px;
  color: var(--muted);
}
.ai__list li b {
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--mint);
  letter-spacing: .08em;
  padding-top: 4px;
  min-width: 52px;
}

/* ---------- terminal ---------- */
.term {
  border: 1px solid var(--line-2);
  background: var(--glass-strong);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  box-shadow: 0 22px 48px -22px rgba(15,32,51,.42),
              0 1px 0 rgba(255,255,255,.8) inset;
  overflow: hidden;
}
.term__bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 11px 14px;
  border-bottom: 1px solid var(--line);
  background: rgba(15, 32, 51, .035);
}
.term__dot { width: 8px; height: 8px; border-radius: 50%; }
.term__bar span {
  margin-left: auto;
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: .12em;
  color: var(--faint);
}

.term__log {
  height: 292px;
  overflow-y: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.6;
}
.msg { animation: rise .35s var(--ease) both; }
@keyframes rise { from { opacity: 0; transform: translateY(7px); } }

.msg--u { color: var(--blue); }
.msg--u b { color: #14448F; font-weight: 500; }
.msg--a { color: var(--muted); }
.msg--a b { color: var(--mint); font-weight: 500; }

.term__form {
  display: flex;
  border-top: 1px solid var(--line);
  background: rgba(15, 32, 51, .03);
}
.term__form input {
  flex: 1;
  min-width: 0;
  padding: 13px 15px;
  border: 0;
  background: transparent;
  color: var(--text);
  font-family: var(--mono);
  font-size: 12px;
  outline: none;
}
.term__form input::placeholder { color: var(--faint); }
.term__form button {
  padding: 0 17px;
  border: 0;
  border-left: 1px solid var(--line);
  background: transparent;
  color: var(--mint);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .1em;
  cursor: pointer;
  transition: background .2s;
}
.term__form button:hover { background: var(--mint); color: var(--ink); }

.term__sugg {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 12px 14px;
  border-top: 1px solid var(--line);
}
.term__sugg button {
  padding: 5px 10px;
  border: 1px solid var(--line-2);
  background: transparent;
  color: var(--faint);
  font-family: var(--mono);
  font-size: 10px;
  cursor: pointer;
  transition: all .2s;
}
.term__sugg button:hover { border-color: var(--mint); color: var(--mint); }

.cursor { display: inline-block; width: 7px; height: 13px; background: var(--mint); animation: blink 1s steps(2) infinite; vertical-align: -2px; }
@keyframes blink { 50% { opacity: 0; } }

/* ============================================================
   LIÊN HỆ
   ============================================================ */
.contact { text-align: left; }

.contact__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(215px, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  margin-bottom: 40px;
  overflow: hidden;
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
}
.contact__cell {
  background: var(--glass-weak);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  padding: 30px 26px;
  transition: background .28s var(--ease);
}
.contact__cell:hover { background: var(--glass); }
.contact__cell dt {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .14em;
  color: var(--faint);
  text-transform: uppercase;
  margin-bottom: 11px;
}
.contact__cell dd { font-size: 16px; font-weight: 500; }
.contact__cell a { color: var(--text); text-decoration: none; transition: color .2s; }
.contact__cell a:hover { color: var(--mint); }

/* ============================================================
   FOOTER
   ============================================================ */
.foot {
  border-top: 1px solid var(--line);
  padding: 34px 0;
}
.foot__in {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
  justify-content: space-between;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--faint);
}
.foot a { color: var(--muted); text-decoration: none; }
.foot a:hover { color: var(--mint); }

/* ---------- hiện khi cuộn ---------- */
.rv { opacity: 0; transform: translateY(26px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.rv.in { opacity: 1; transform: none; }

/* ============================================================
   RESPONSIVE
   ============================================================ */

/* ============================================================
   DỰ ÁN — bộ lọc + lưới thẻ + lightbox
   ============================================================ */
.pfilter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 32px;
}
.pfilter button {
  padding: 7px 15px;
  border: 1px solid var(--line-2);
  background: var(--glass-weak);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--muted);
  cursor: pointer;
  transition: all .22s var(--ease);
}
.pfilter button:hover { border-color: var(--mint); color: var(--mint); transform: translateY(-2px); }
.pfilter button.on {
  background: var(--mint);
  border-color: var(--mint);
  color: #fff;
  box-shadow: 0 6px 14px -6px rgba(0,112,76,.55);
}

.projects {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 20px;
}

.proj {
  position: relative;
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line);
  background: var(--glass);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  box-shadow: 0 16px 36px -26px rgba(15,32,51,.34),
              0 1px 0 rgba(255,255,255,.65) inset;
  overflow: hidden;
  transition: border-color .3s var(--ease), transform .3s var(--ease), box-shadow .3s var(--ease);
}
.proj:hover {
  border-color: var(--mint);
  transform: translateY(-6px);
  box-shadow: 0 26px 50px -26px rgba(15,32,51,.44),
              0 1px 0 rgba(255,255,255,.8) inset;
}
.proj.hide { display: none; }

.proj__shot {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: rgba(15,32,51,.06);
  cursor: zoom-in;
}
.proj__shot img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform .6s var(--ease);
}
.proj:hover .proj__shot img { transform: scale(1.06); }
.proj__shot::after {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(transparent 55%, rgba(7,14,22,.34));
  pointer-events: none;
}
.proj__n {
  position: absolute;
  top: 10px; left: 10px;
  padding: 4px 9px;
  background: rgba(7,14,22,.62);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .1em;
  color: #EAF2FB;
}
.proj__flag {
  position: absolute;
  top: 10px; right: 10px;
  padding: 4px 9px;
  background: var(--mint);
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: .12em;
  color: #fff;
  text-transform: uppercase;
}
.proj__count {
  position: absolute;
  right: 10px; bottom: 10px;
  padding: 3px 8px;
  background: rgba(7,14,22,.6);
  font-family: var(--mono);
  font-size: 10px;
  color: #EAF2FB;
}

.proj__body { padding: 20px 22px 22px; display: flex; flex-direction: column; flex: 1; }
.proj__body h4 {
  font-family: var(--display);
  font-size: 19px;
  font-weight: 700;
  letter-spacing: -.015em;
  line-height: 1.24;
  margin-bottom: 8px;
}
.proj__body > p {
  font-size: 13.8px;
  color: var(--muted);
  line-height: 1.6;
  margin-bottom: 14px;
  flex: 1;
}
.proj__meta { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 13px; }
.proj__meta span {
  padding: 3px 8px;
  border: 1px solid var(--line);
  background: var(--glass-weak);
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: .07em;
  color: var(--muted);
}
.proj__tech { display: flex; flex-wrap: wrap; gap: 6px; }
.proj__tech span {
  padding: 4px 9px;
  border: 1px solid var(--line-2);
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--muted);
  transition: all .2s var(--ease);
}
.proj:hover .proj__tech span { border-color: rgba(0,112,76,.4); }
.proj__links { display: flex; gap: 14px; margin-top: 15px; }
.proj__links a {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .1em;
  color: var(--mint);
  text-decoration: none;
  border-bottom: 1px solid rgba(0,112,76,.32);
  padding-bottom: 1px;
  transition: border-color .2s;
}
.proj__links a:hover { border-bottom-color: var(--mint); }

.proj__shot--none {
  display: grid;
  place-items: center;
  background:
    repeating-linear-gradient(45deg,
      rgba(15,32,51,.035) 0 10px, transparent 10px 20px),
    rgba(255,255,255,.5);
  cursor: default;
}
.proj__shot--none span {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .14em;
  color: var(--faint);
  text-transform: uppercase;
}

/* ---------- lightbox ---------- */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: none;
  place-items: center;
  padding: 28px;
  background: rgba(10,16,24,.72);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}
.lightbox.on { display: grid; }
.lightbox img {
  max-width: 100%;
  max-height: 84vh;
  object-fit: contain;
  border: 1px solid rgba(255,255,255,.16);
  box-shadow: 0 40px 90px -30px rgba(0,0,0,.7);
}
.lightbox__cap {
  margin-top: 14px;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: .06em;
  color: #C9D6E4;
  text-align: center;
}
.lightbox__x {
  position: absolute;
  top: 20px; right: 24px;
  width: 40px; height: 40px;
  display: grid; place-items: center;
  border: 1px solid rgba(255,255,255,.22);
  background: rgba(255,255,255,.07);
  color: #EAF2FB;
  font-size: 20px;
  cursor: pointer;
  transition: background .2s, transform .2s var(--ease);
}
.lightbox__x:hover { background: rgba(255,255,255,.16); transform: rotate(90deg); }
.lightbox__nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 44px; height: 62px;
  display: grid; place-items: center;
  border: 1px solid rgba(255,255,255,.18);
  background: rgba(255,255,255,.06);
  color: #EAF2FB;
  font-size: 22px;
  cursor: pointer;
  transition: background .2s;
}
.lightbox__nav:hover { background: rgba(255,255,255,.16); }
.lightbox__nav.prev { left: 16px; }
.lightbox__nav.next { right: 16px; }

/* ============================================================
   HIỆU ỨNG TƯƠNG TÁC
   ============================================================ */
.progress {
  position: fixed;
  top: 0; left: 0;
  height: 2px;
  width: 0;
  z-index: 90;
  background: var(--mint);
  box-shadow: 0 0 10px rgba(0,112,76,.6);
  transition: width .1s linear;
}

.aura {
  position: fixed;
  z-index: 1;
  width: 460px; height: 460px;
  margin: -230px 0 0 -230px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0,112,76,.10), transparent 66%);
  pointer-events: none;
  opacity: 0;
  transition: opacity .4s;
}
.aura.on { opacity: 1; }

.spot {
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  opacity: 0;
  background: radial-gradient(340px circle at var(--mx, 50%) var(--my, 50%),
              rgba(0,112,76,.13), transparent 62%);
  transition: opacity .35s var(--ease);
}
.proj:hover .spot, .work:hover .spot, .skill:hover .spot { opacity: 1; }

.rv .sec-title { position: relative; }
.rv .sec-title::after {
  content: '';
  position: absolute;
  left: 0; bottom: -4px;
  height: 2px;
  width: 0;
  background: var(--mint);
  transition: width .8s var(--ease) .25s;
}
.rv.in .sec-title::after { width: 46px; }

.ripple {
  position: absolute;
  border-radius: 50%;
  transform: scale(0);
  background: rgba(255,255,255,.45);
  pointer-events: none;
  animation: ripple .6s ease-out;
}
@keyframes ripple { to { transform: scale(2.6); opacity: 0; } }

@media (max-width: 900px) {
  .aura { display: none; }
  .projects { grid-template-columns: 1fr; }
  .lightbox__nav { display: none; }
}

@media (max-width: 1000px) {
  .profile { grid-template-columns: 1fr; }
  .card--offset { margin-top: 0; }
  .ai { grid-template-columns: 1fr; }
  .term__log { height: 250px; }

  /* ảnh lên trên chữ, canh giữa */
  .hero__grid { grid-template-columns: 1fr; gap: 34px; }
  .idcard { order: -1; justify-self: center; }
  .hero__text { text-align: left; }
}

@media (max-width: 720px) {
  :root { --rail: 0px; }

  .rail {
    top: 0; bottom: auto;
    width: 100%;
    height: 52px;
    flex-direction: row;
    padding: 0 16px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }
  .rail__nav {
    flex-direction: row;
    gap: 2px;
    overflow-x: auto;
    scrollbar-width: none;
  }
  .rail__nav::-webkit-scrollbar { display: none; }
  .rail__link::before { left: 50%; top: auto; bottom: 0; width: 0; height: 2px; transform: translateX(-50%); transition: width .3s var(--ease); }
  .rail__link.is-active::before { width: 20px; height: 2px; }
  .rail__link::after { display: none; }
  .rail__tick { display: none; }

  .shell { margin-left: 0; }
  .hero { padding-top: 120px; min-height: auto; }
  .scroll-cue { display: none; }

  .job { grid-template-columns: 1fr; gap: 14px; padding: 24px 0; }
  .job__meta { display: flex; align-items: center; gap: 12px; }
  .job__tag { margin-top: 0; }

  .skills { grid-template-columns: 1fr; }
  .stats { gap: 26px; }
  .sec-rule { margin-bottom: 38px; }
}

@media (max-width: 420px) {
  .stats { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
  .btn { width: 100%; justify-content: center; }
}

/* ---------- tôn trọng thiết lập giảm chuyển động ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
    scroll-behavior: auto !important;
  }
  .rv { opacity: 1; transform: none; }
}