/* ==========================================================================
   me.aiha.dev — Hồ sơ năng lực AI ứng dụng
   Nguyên tắc: một hệ màu, đọc tốt trên giấy in lẫn màn hình, responsive
   ========================================================================== */

:root {
  color-scheme: light;

  --ink:            #14181d;
  --ink-soft:       #3d4653;
  --ink-faint:      #6b7684;
  --line:           #e2e6ea;
  --line-soft:      #eef1f4;
  --paper:          #ffffff;
  --paper-tint:     #f7f8fa;
  --paper-deep:     #eff2f5;

  --accent:         #0f5c4d;
  --accent-bright:  #14806b;
  --accent-tint:    #e6f2ef;
  --accent-ink:     #0b4539;

  --on-accent:      #ffffff;
  --on-tint:        #0a4034;
  --brand-1:        #0f5c4d;
  --brand-2:        #0b4539;

  --warm:           #a8571f;
  --warm-tint:      #fbf0e6;

  --ok:             #0a4034;
  --ok-bg:          #e2f0eb;
  --wip:            #7a4a12;
  --wip-bg:         #fbf0e0;
  --plan:           #4a5361;
  --plan-bg:        #eceff2;

  --radius:     14px;
  --radius-sm:  9px;
  --shadow:     0 1px 2px rgba(20,24,29,.05), 0 8px 24px -12px rgba(20,24,29,.14);
  --shadow-lg:  0 2px 4px rgba(20,24,29,.05), 0 20px 48px -20px rgba(20,24,29,.22);

  --sans: "Be Vietnam Pro", -apple-system, BlinkMacSystemFont, "Segoe UI",
          "Noto Sans SC", "PingFang SC", "Microsoft YaHei", Roboto, Arial, sans-serif;
  --serif: "Lora", Georgia, "Songti SC", "Noto Serif SC", serif;

  --wrap: 1120px;
  --gut: clamp(1.15rem, 4vw, 2.75rem);
}

/* Chỉ bật dark khi người dùng chọn — mặc định luôn Light, không theo hệ thống */
:root[data-theme="dark"] {
  color-scheme: dark;

  --ink:           #eef1f4;
  --ink-soft:      #b3bcc7;
  --ink-faint:     #7f8b98;
  --line:          #2b3239;
  --line-soft:     #232930;
  --paper:         #131720;
  --paper-tint:    #191e28;
  --paper-deep:    #1f2530;
  --accent:        #4dc4a8;
  --accent-bright: #6fdcc0;
  --accent-tint:   #16302a;
  --accent-ink:    #8fe8cf;
  --on-accent:     #06201a;
  --on-tint:       #8fe8cf;
  --brand-1:       #0d4a3e;
  --brand-2:       #072e26;
  --warm:          #e0a06a;
  --warm-tint:     #2e2318;
  --ok:            #7fe0c4;
  --ok-bg:         #14312a;
  --wip:           #e8b877;
  --wip-bg:        #33260f;
  --plan:          #a8b3c0;
  --plan-bg:       #262c35;
  --shadow:        0 1px 2px rgba(0,0,0,.4), 0 8px 24px -12px rgba(0,0,0,.6);
  --shadow-lg:     0 2px 4px rgba(0,0,0,.4), 0 20px 48px -20px rgba(0,0,0,.7);
}

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

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}

body {
  margin: 0;
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.68;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

:lang(zh) { line-height: 1.8; }

a { color: var(--accent-bright); text-decoration: none; }
a:hover { text-decoration: underline; }

:focus-visible {
  outline: 2.5px solid var(--accent-bright);
  outline-offset: 3px;
  border-radius: 3px;
}

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

.wrap { width: 100%; max-width: var(--wrap); margin-inline: auto; padding-inline: var(--gut); }

.skip {
  position: absolute; left: -9999px; top: 0; z-index: 200;
  background: var(--accent); color: #fff; padding: .7rem 1.1rem;
  border-radius: 0 0 var(--radius-sm) 0; font-weight: 600;
}
.skip:focus { left: 0; }

/* ---------- Header ---------- */

.site-head {
  position: sticky; top: 0; z-index: 100;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--line-soft);
}
.site-head__inner {
  display: flex; align-items: center; gap: 1rem;
  min-height: 62px;
}
.brand {
  font-weight: 700; letter-spacing: -.015em; font-size: 1.0rem;
  color: var(--ink); display: inline-flex; align-items: center; gap: .55rem;
  flex-shrink: 0;
}
.brand:hover { text-decoration: none; }
.brand__mark {
  width: 27px; height: 27px; border-radius: 8px; flex-shrink: 0;
  background: linear-gradient(135deg, var(--accent-bright), var(--accent));
  color: #fff; display: grid; place-items: center;
  font-size: .68rem; font-weight: 800; letter-spacing: .02em;
}

.nav { display: flex; gap: .15rem; margin-left: auto; align-items: center; }
.nav a {
  color: var(--ink-soft); font-size: .875rem; font-weight: 500;
  padding: .42rem .68rem; border-radius: 7px; white-space: nowrap;
}
.nav a:hover { color: var(--ink); background: var(--paper-tint); text-decoration: none; }

.head-tools {
  display: flex; align-items: center; gap: .45rem;
  margin-left: .7rem; flex-shrink: 0;
}

.theme-btn {
  display: inline-grid; place-items: center;
  width: 34px; height: 34px; padding: 0; margin: 0;
  border: 1px solid var(--line); border-radius: 8px;
  background: var(--paper-deep); color: var(--ink-soft);
  cursor: pointer; transition: background .2s ease, color .2s ease, border-color .2s ease;
}
.theme-btn:hover { color: var(--ink); background: var(--paper-tint); border-color: var(--line); }
.theme-btn:active { transform: scale(.98); }
.theme-btn svg { width: 16px; height: 16px; display: block; }
.theme-btn .icon-sun { display: none; }
.theme-btn .icon-moon { display: block; }
:root[data-theme="dark"] .theme-btn .icon-sun { display: block; }
:root[data-theme="dark"] .theme-btn .icon-moon { display: none; }

.langs {
  display: flex; gap: 2px; flex-shrink: 0;
  background: var(--paper-deep); padding: 3px; border-radius: 8px;
}
.langs a {
  font-size: .74rem; font-weight: 700; letter-spacing: .05em;
  padding: .3rem .5rem; border-radius: 6px; color: var(--ink-faint);
  text-transform: uppercase;
}
.langs a:hover { color: var(--ink); text-decoration: none; }
.langs a[aria-current="true"] { background: var(--paper); color: var(--accent-bright); box-shadow: 0 1px 2px rgba(0,0,0,.08); }

@media (max-width: 860px) {
  .nav { display: none; }
  .head-tools { margin-left: auto; }
}

/* ---------- Section scaffolding ---------- */

section { scroll-margin-top: 74px; }

.band { padding-block: clamp(3.2rem, 7vw, 5.6rem); }
.band--tint { background: var(--paper-tint); border-block: 1px solid var(--line-soft); }

.sec-head { max-width: 42rem; margin-bottom: clamp(2rem, 4vw, 3rem); }
.sec-head__kicker {
  font-size: .72rem; font-weight: 700; letter-spacing: .14em; text-transform: uppercase;
  color: var(--accent-bright); margin: 0 0 .7rem;
}
.sec-head h2 {
  font-family: var(--serif); font-weight: 600;
  font-size: clamp(1.65rem, 3.6vw, 2.35rem); line-height: 1.24;
  letter-spacing: -.018em; margin: 0 0 .6rem; color: var(--ink);
}
.sec-head p { margin: 0; color: var(--ink-faint); font-size: 1.02rem; }

/* ---------- Hero ---------- */

.hero {
  position: relative; overflow: hidden;
  padding-block: clamp(3.4rem, 9vw, 6.5rem);
  background:
    radial-gradient(900px 460px at 12% -12%, var(--accent-tint), transparent 62%),
    radial-gradient(700px 420px at 96% 8%, var(--warm-tint), transparent 58%);
}
.hero__grid {
  display: grid; grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
  gap: clamp(2rem, 5vw, 4rem); align-items: center;
}
@media (max-width: 900px) { .hero__grid { grid-template-columns: 1fr; } }

.hero__eyebrow {
  display: inline-flex; align-items: center; gap: .45rem;
  font-size: .72rem; font-weight: 700; letter-spacing: .14em; text-transform: uppercase;
  color: var(--on-tint); background: var(--accent-tint);
  padding: .34rem .72rem; border-radius: 99px; margin: 0 0 1.15rem;
}
.hero h1 {
  font-family: var(--serif); font-weight: 600;
  font-size: clamp(2.5rem, 7vw, 4.1rem); line-height: 1.02;
  letter-spacing: -.032em; margin: 0 0 .55rem;
}
.hero__role {
  font-size: clamp(1rem, 2.2vw, 1.16rem); font-weight: 600; color: var(--accent-bright);
  margin: 0 0 1.5rem; letter-spacing: -.005em;
}
.hero__tagline {
  font-family: var(--serif); font-size: clamp(1.16rem, 2.7vw, 1.5rem);
  line-height: 1.42; color: var(--ink); margin: 0 0 1.3rem;
  letter-spacing: -.012em;
}
.hero__lede { font-size: 1.02rem; color: var(--ink-soft); margin: 0 0 2rem; max-width: 36rem; }

.btns { display: flex; flex-wrap: wrap; gap: .7rem; }
.btn {
  display: inline-flex; align-items: center; gap: .45rem;
  font-size: .93rem; font-weight: 600; padding: .78rem 1.35rem;
  border-radius: 99px; border: 1.5px solid transparent; transition: all .18s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn--solid { background: var(--accent); color: var(--on-accent); box-shadow: var(--shadow); }
.btn--solid:hover { background: var(--accent-bright); box-shadow: var(--shadow-lg); }
.btn--ghost { border-color: var(--line); color: var(--ink); background: var(--paper); }
.btn--ghost:hover { border-color: var(--accent-bright); color: var(--accent-bright); }

.stats {
  display: grid; grid-template-columns: repeat(2, minmax(0,1fr));
  gap: 1px; background: var(--line);
  border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden;
}
.stat { background: var(--paper); padding: 1.25rem 1.15rem; }
.stat__v {
  font-family: var(--serif); font-size: clamp(1.9rem, 4vw, 2.5rem); font-weight: 600;
  line-height: 1; color: var(--accent-bright); letter-spacing: -.03em; display: block;
}
.stat__l { font-size: .795rem; color: var(--ink-faint); margin-top: .45rem; line-height: 1.42; display: block; }

/* ---------- Prose ---------- */

.prose p { font-size: 1.03rem; color: var(--ink-soft); margin: 0 0 1.1rem; max-width: 40rem; }
.prose p:last-child { margin-bottom: 0; }
.prose p:first-of-type { font-size: 1.1rem; color: var(--ink); }

.split { display: grid; grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr); gap: clamp(2rem, 5vw, 3.8rem); align-items: start; }
@media (max-width: 900px) { .split { grid-template-columns: 1fr; } }

.panel {
  background: var(--paper); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 1.5rem 1.4rem; box-shadow: var(--shadow);
}
.panel + .panel { margin-top: 1.1rem; }
.panel h3 {
  font-size: .73rem; font-weight: 700; letter-spacing: .13em; text-transform: uppercase;
  color: var(--ink-faint); margin: 0 0 1.05rem;
}

.cred { display: grid; gap: .95rem; }
.cred__i { display: grid; gap: .12rem; }
.cred__t { font-weight: 600; font-size: .95rem; color: var(--ink); line-height: 1.4; }
.cred__o { font-size: .87rem; color: var(--ink-soft); }
.cred__p { font-size: .8rem; color: var(--ink-faint); font-variant-numeric: tabular-nums; }

/* ---------- Roles timeline ---------- */

.roles { margin-top: clamp(2.2rem, 4vw, 3rem); display: grid; gap: 0; }
.role {
  display: grid; grid-template-columns: 12.5rem minmax(0,1fr);
  gap: 1.5rem; padding: 1.35rem 0; border-top: 1px solid var(--line);
}
.role:last-child { border-bottom: 1px solid var(--line); }
@media (max-width: 720px) { .role { grid-template-columns: 1fr; gap: .5rem; } }
.role__when { font-size: .82rem; color: var(--ink-faint); font-variant-numeric: tabular-nums; padding-top: .15rem; }
.role__org { font-weight: 650; font-size: 1.0rem; color: var(--ink); margin: 0 0 .12rem; letter-spacing: -.008em; }
.role__title { font-size: .89rem; color: var(--accent-bright); font-weight: 600; margin: 0 0 .45rem; }
.role__note { font-size: .92rem; color: var(--ink-soft); margin: 0; }

/* ---------- Capability cards ---------- */

.caps { display: grid; grid-template-columns: 1fr; gap: 1.1rem; }
@media (min-width: 780px) { .caps { grid-template-columns: repeat(2, minmax(0,1fr)); } }
.cap {
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1.55rem 1.5rem; box-shadow: var(--shadow); display: flex; flex-direction: column;
}
.cap__icon {
  width: 40px; height: 40px; border-radius: 11px; margin-bottom: 1.05rem;
  background: var(--accent-tint); color: var(--accent-bright);
  display: grid; place-items: center; flex-shrink: 0;
}
.cap__icon svg { width: 21px; height: 21px; stroke: currentColor; fill: none; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.cap h3 { font-size: 1.09rem; font-weight: 650; margin: 0 0 .6rem; letter-spacing: -.014em; line-height: 1.32; }
.cap p { font-size: .93rem; color: var(--ink-soft); margin: 0 0 1.15rem; flex: 1; }

.tags { display: flex; flex-wrap: wrap; gap: .4rem; }
.tag {
  font-size: .745rem; font-weight: 600; padding: .27rem .6rem; border-radius: 6px;
  background: var(--paper-deep); color: var(--ink-soft); letter-spacing: -.002em;
}

.stack-strip { margin-top: 2rem; padding-top: 1.6rem; border-top: 1px solid var(--line); }
.stack-strip h3 {
  font-size: .72rem; font-weight: 700; letter-spacing: .13em; text-transform: uppercase;
  color: var(--ink-faint); margin: 0 0 .9rem;
}
.stack-list { display: flex; flex-wrap: wrap; gap: .4rem; list-style: none; padding: 0; margin: 0; }
.stack-list li {
  font-size: .795rem; font-weight: 550; padding: .32rem .68rem;
  border: 1px solid var(--line); border-radius: 99px; color: var(--ink-soft);
  background: var(--paper);
}

/* ---------- Case studies ---------- */

.case-filters {
  display: flex; flex-wrap: wrap; gap: .4rem; margin-bottom: 1.6rem;
}
.chip {
  font-size: .8rem; font-weight: 600; padding: .42rem .85rem; border-radius: 99px;
  border: 1px solid var(--line); background: var(--paper); color: var(--ink-soft);
  cursor: pointer; font-family: inherit; transition: all .15s ease;
}
.chip:hover { border-color: var(--accent-bright); color: var(--accent-bright); }
.chip[aria-pressed="true"] { background: var(--accent); border-color: var(--accent); color: #fff; }

.cases { display: grid; gap: 1rem; }

.case {
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow); overflow: hidden;
}
.case[hidden] { display: none; }
.case > summary {
  list-style: none; cursor: pointer; padding: 1.3rem 1.45rem;
  display: grid; grid-template-columns: minmax(0,1fr) auto; gap: 1rem; align-items: start;
}
.case > summary::-webkit-details-marker { display: none; }
.case > summary:hover { background: var(--paper-tint); }
.case__dept {
  display: inline-block; font-size: .705rem; font-weight: 700; letter-spacing: .09em;
  text-transform: uppercase; color: var(--on-tint); background: var(--accent-tint);
  padding: .22rem .58rem; border-radius: 5px; margin-bottom: .55rem;
}
.case__title {
  font-family: var(--serif); font-size: clamp(1.05rem, 2.2vw, 1.24rem); font-weight: 600;
  line-height: 1.34; letter-spacing: -.014em; margin: 0; color: var(--ink);
}
.case__chev {
  width: 26px; height: 26px; border-radius: 50%; background: var(--paper-deep);
  display: grid; place-items: center; flex-shrink: 0; margin-top: .3rem;
  transition: transform .22s ease; color: var(--ink-faint);
}
.case[open] .case__chev { transform: rotate(180deg); }
.case__chev svg { width: 13px; height: 13px; stroke: currentColor; fill: none; stroke-width: 2.2; stroke-linecap: round; stroke-linejoin: round; }

.case__body { padding: 0 1.45rem 1.5rem; border-top: 1px solid var(--line-soft); }
.case__row { padding-top: 1.15rem; }
.case__label {
  font-size: .705rem; font-weight: 700; letter-spacing: .11em; text-transform: uppercase;
  color: var(--ink-faint); margin: 0 0 .4rem;
}
.case__row p { margin: 0; font-size: .945rem; color: var(--ink-soft); }
.case__row--result {
  margin-top: 1.15rem; padding: .95rem 1.05rem; background: var(--accent-tint);
  border-radius: var(--radius-sm); border-left: 3px solid var(--accent-bright);
}
.case__row--result .case__label { color: var(--on-tint); }
.case__row--result p { color: var(--ink); font-weight: 500; }

.note {
  font-size: .855rem; color: var(--ink-faint); font-style: italic;
  margin: 1.5rem 0 0; padding-left: .85rem; border-left: 2px solid var(--line);
}

/* ---------- Training ---------- */

.principles {
  display: grid; grid-template-columns: 1fr; gap: 1.1rem;
  margin-bottom: clamp(2.5rem, 5vw, 3.5rem);
}
@media (min-width: 620px)  { .principles { grid-template-columns: repeat(2, minmax(0,1fr)); } }
@media (min-width: 1080px) { .principles { grid-template-columns: repeat(4, minmax(0,1fr)); } }
.principle {
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1.45rem 1.35rem;
}
.principle__n {
  font-family: var(--serif); font-size: 1.7rem; font-weight: 600; line-height: 1;
  color: var(--accent-bright); opacity: .5; display: block; margin-bottom: .8rem;
  letter-spacing: -.03em;
}
.principle h3 { font-size: 1.0rem; font-weight: 650; margin: 0 0 .55rem; letter-spacing: -.012em; line-height: 1.34; }
.principle p { font-size: .9rem; color: var(--ink-soft); margin: 0; }

.scope-note { font-size: .93rem; color: var(--ink-soft); margin: 0 0 1.3rem; max-width: 42rem; }

.scope-table { width: 100%; }
.scope-table table { width: 100%; border-collapse: collapse; font-size: .93rem; }
.scope-table th {
  text-align: left; font-size: .705rem; font-weight: 700; letter-spacing: .11em;
  text-transform: uppercase; color: var(--ink-faint); padding: 0 1rem .7rem 0;
  border-bottom: 1.5px solid var(--line);
}
.scope-table td { padding: .8rem 1rem .8rem 0; border-bottom: 1px solid var(--line-soft); vertical-align: top; }
.scope-table td:first-child { font-weight: 650; color: var(--ink); white-space: nowrap; width: 1%; }
.scope-table td:last-child { color: var(--ink-soft); padding-right: 0; }
@media (max-width: 620px) {
  .scope-table thead { position: absolute; left: -9999px; }
  .scope-table tr { display: block; padding: .85rem 0; border-bottom: 1px solid var(--line-soft); }
  .scope-table td { display: block; border: 0; padding: 0; }
  .scope-table td:first-child { width: auto; margin-bottom: .2rem; color: var(--accent-bright); }
}

.format-grid {
  display: grid; grid-template-columns: 1fr;
  gap: 1px; background: var(--line); border: 1px solid var(--line);
  border-radius: var(--radius); overflow: hidden; margin-top: clamp(2.2rem, 4vw, 3rem);
}
@media (min-width: 560px) { .format-grid { grid-template-columns: repeat(2, minmax(0,1fr)); } }
@media (min-width: 900px) { .format-grid { grid-template-columns: repeat(3, minmax(0,1fr)); } }
.fmt { background: var(--paper); padding: 1.2rem 1.25rem; }
.fmt__l {
  font-size: .705rem; font-weight: 700; letter-spacing: .11em; text-transform: uppercase;
  color: var(--accent-bright); margin: 0 0 .4rem;
}
.fmt__v { font-size: .93rem; color: var(--ink-soft); margin: 0; }



/* ---------- Clients strip ---------- */

.clients {
  margin-top: clamp(2.4rem, 5vw, 3.4rem);
  padding-top: clamp(1.5rem, 3vw, 2rem);
  border-top: 1px solid var(--line);
  display: flex; flex-wrap: wrap; align-items: baseline; gap: .55rem 1rem;
}
.clients__l {
  font-size: .715rem; font-weight: 700; letter-spacing: .13em; text-transform: uppercase;
  color: var(--ink-faint); margin: 0; flex-shrink: 0;
}
.clients__list {
  display: flex; flex-wrap: wrap; gap: .4rem .95rem;
  list-style: none; padding: 0; margin: 0;
}
.clients__list li {
  font-size: .95rem; font-weight: 600; color: var(--ink); letter-spacing: -.01em;
  position: relative;
}
.clients__list li + li::before {
  content: "·"; position: absolute; left: -.55rem; color: var(--ink-faint); font-weight: 400;
}
.clients__n { font-size: .875rem; color: var(--ink-faint); margin: 0; font-style: italic; }

/* ---------- Status badges ---------- */

.case__meta { display: flex; flex-wrap: wrap; align-items: center; gap: .45rem; margin-bottom: .6rem; }
.case__meta .case__dept { margin-bottom: 0; }

/* Trên thẻ dự án: chuỗi ngắn -> viên thuốc có nền */
.case__status {
  display: inline-block; font-size: .695rem; font-weight: 700; letter-spacing: .045em;
  padding: .22rem .55rem; border-radius: 5px; white-space: nowrap;
}
.case__status[data-s="done"] { background: var(--ok-bg);   color: var(--ok); }
.case__status[data-s="wip"]  { background: var(--wip-bg);  color: var(--wip); }
.case__status[data-s="plan"] { background: var(--plan-bg); color: var(--plan); }

.case__client {
  font-size: .795rem; font-weight: 600; color: var(--ink-faint);
  letter-spacing: -.005em; position: relative; padding-left: .7rem;
}
.case__client::before {
  content: "·"; position: absolute; left: .1rem; color: var(--line);
  font-weight: 400;
}


/* Trong bảng: chuỗi dài nên dùng chữ có chấm màu thay vì viên thuốc */
.sstat {
  display: inline-flex; align-items: baseline; gap: .42rem;
  background: none; padding: 0; border-radius: 0;
  font-size: .845rem; font-weight: 600; letter-spacing: -.004em;
  line-height: 1.45; white-space: normal;
}
.sstat::before {
  content: ""; width: 7px; height: 7px; border-radius: 50%;
  background: currentColor; flex-shrink: 0; transform: translateY(-1px);
}
.sstat[data-s="done"] { color: var(--ok); }
.sstat[data-s="wip"]  { color: var(--wip); }
.sstat[data-s="plan"] { color: var(--plan); }

.scope-table td:last-child { white-space: normal; padding-right: 0; }
@media (min-width: 900px) {
  .scope-table th:nth-child(3), .scope-table td:nth-child(3) { width: 17rem; }
  .scope-table th:nth-child(1), .scope-table td:nth-child(1) { width: 11rem; }
}
@media (max-width: 620px) { .scope-table td:nth-child(3) { margin-top: .45rem; } }

/* ---------- Training: lede, pull quote, method steps ---------- */

.lede-lg {
  font-size: clamp(1.02rem, 2.2vw, 1.12rem); color: var(--ink);
  max-width: 44rem; margin: 0 0 clamp(1.8rem, 4vw, 2.6rem);
}

.sub-h {
  font-family: var(--serif); font-size: clamp(1.18rem, 2.6vw, 1.38rem);
  font-weight: 600; letter-spacing: -.016em; margin: 0 0 .6rem; color: var(--ink);
}
.sub-h + .scope-note { margin-bottom: 1.3rem; }
.steps + .sub-h, .scope-table + .sub-h, .principles + .sub-h { margin-top: clamp(2.4rem, 5vw, 3.2rem); }

.pullquote {
  margin: 0 0 clamp(2.2rem, 4.5vw, 3rem);
  padding: clamp(1.4rem, 3.5vw, 2rem) clamp(1.4rem, 3.5vw, 2.1rem);
  background: var(--paper); border: 1px solid var(--line);
  border-left: 4px solid var(--accent-bright);
  border-radius: var(--radius); box-shadow: var(--shadow);
  display: grid; gap: .85rem; max-width: 52rem;
}
.pullquote blockquote {
  margin: 0; font-family: var(--serif);
  font-size: clamp(1.35rem, 3.4vw, 1.85rem); line-height: 1.24;
  font-weight: 600; letter-spacing: -.022em; color: var(--ink);
}
.pullquote figcaption { font-size: .96rem; color: var(--ink-soft); margin: 0; }

.steps {
  display: grid; grid-template-columns: 1fr; gap: 1px;
  background: var(--line); border: 1px solid var(--line);
  border-radius: var(--radius); overflow: hidden;
}
@media (min-width: 560px) { .steps { grid-template-columns: repeat(2, minmax(0,1fr)); } }
@media (min-width: 1000px) { .steps { grid-template-columns: repeat(4, minmax(0,1fr)); } }
.step {
  background: var(--paper); padding: 1.15rem 1.2rem;
  display: grid; grid-template-columns: auto minmax(0,1fr); gap: .8rem; align-items: start;
}
.step__n {
  width: 25px; height: 25px; border-radius: 50%; flex-shrink: 0;
  background: var(--accent-tint); color: var(--on-tint);
  display: grid; place-items: center;
  font-size: .78rem; font-weight: 700; font-variant-numeric: tabular-nums;
}
.step__l { font-size: .95rem; font-weight: 650; color: var(--ink); margin: 0 0 .25rem; letter-spacing: -.01em; }
.step__b { font-size: .875rem; color: var(--ink-soft); margin: 0; }


/* ---------- Persona bar ---------- */

.personabar {
  background: var(--paper-tint);
  border-block: 1px solid var(--line);
  padding-block: clamp(1.1rem, 2.6vw, 1.6rem);
  position: relative; z-index: 5;
}
.personabar__in { display: grid; gap: .75rem; }
.personabar__l {
  font-size: .715rem; font-weight: 700; letter-spacing: .13em; text-transform: uppercase;
  color: var(--ink-faint); margin: 0;
}
.personabar__opts {
  display: grid; grid-template-columns: 1fr; gap: .5rem;
}
@media (min-width: 620px)  { .personabar__opts { grid-template-columns: repeat(2, minmax(0,1fr)); } }
@media (min-width: 1000px) { .personabar__opts { grid-template-columns: repeat(5, minmax(0,1fr)); } }
.personabar__n { font-size: .82rem; color: var(--ink-faint); margin: 0; }

.pbtn {
  font-family: inherit; text-align: left; cursor: pointer;
  background: var(--paper); border: 1.5px solid var(--line);
  border-radius: var(--radius-sm); padding: .7rem .85rem;
  display: grid; gap: .18rem; transition: border-color .15s ease, box-shadow .15s ease;
}
.pbtn:hover { border-color: var(--accent-bright); }
.pbtn__n { font-size: .93rem; font-weight: 650; color: var(--ink); letter-spacing: -.012em; }
.pbtn__b { font-size: .785rem; color: var(--ink-faint); line-height: 1.4; }
.pbtn[aria-pressed="true"] {
  border-color: var(--accent); background: var(--accent-tint); box-shadow: var(--shadow);
}
.pbtn[aria-pressed="true"] .pbtn__n { color: var(--on-tint); }
.pbtn[aria-pressed="true"] .pbtn__b { color: var(--on-tint); opacity: .82; }

.chip--off { opacity: .35; cursor: not-allowed; }
.chip--off:hover { border-color: var(--line); color: var(--ink-soft); }

/* ---------- Persona intro ---------- */

.pintro {
  background: var(--accent-tint);
  border-bottom: 1px solid var(--line);
  padding-block: clamp(1.35rem, 3vw, 2.1rem);
}
.pintro__in { max-width: 40rem; }
.pintro h2 {
  font-family: var(--serif); font-weight: 600;
  font-size: clamp(1.25rem, 2.8vw, 1.65rem); line-height: 1.28;
  letter-spacing: -.02em; margin: 0 0 .7rem; color: var(--on-tint);
}
.pintro p { font-size: .98rem; color: var(--ink-soft); margin: 0 0 .65rem; line-height: 1.55; }
.pintro p:last-of-type { margin-bottom: 0; }
.pintro .btn { margin-top: .85rem; }

/* Dòng góc nhìn hiện ngay trên tiêu đề case — không nằm trong phần đóng */
.case__peek {
  display: block; margin: .5rem 0 0;
  font-size: .88rem; line-height: 1.45; color: var(--accent-ink); font-weight: 550;
}
.case__peek span {
  display: inline-block; margin-right: .35rem;
  font-size: .66rem; font-weight: 700; letter-spacing: .07em; text-transform: uppercase;
  color: var(--ink-faint); vertical-align: .06em;
}

/* ---------- Agent panel ---------- */

.agent__grid {
  display: grid; grid-template-columns: 1fr; gap: 1.4rem;
  margin-bottom: clamp(1.6rem, 3.5vw, 2.2rem);
}
@media (min-width: 860px) { .agent__grid { grid-template-columns: minmax(0,1.4fr) minmax(0,1fr); } }
.agent__actions { display: flex; flex-wrap: wrap; gap: .65rem; margin-top: 1.4rem; }
.agent__prompt { align-self: start; }
.agent__ptext {
  font-size: .92rem; color: var(--ink-soft); margin: 0;
  padding: .85rem .95rem; background: var(--paper-deep);
  border-radius: var(--radius-sm); border-left: 3px solid var(--accent-bright);
  font-style: italic;
}
.agent__md {
  margin: 0; max-height: 30rem; overflow: auto;
  background: var(--paper-deep); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 1.1rem 1.2rem;
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: .775rem; line-height: 1.6; color: var(--ink-soft);
  white-space: pre-wrap; word-break: break-word;
  -webkit-overflow-scrolling: touch;
}

/* Không có JavaScript thì mọi thứ vẫn hiện đủ */
[data-p][hidden] { display: none; }

/* ---------- Contact ---------- */

.contact-card {
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow-lg); overflow: hidden;
  display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
}
@media (max-width: 800px) { .contact-card { grid-template-columns: 1fr; } }
.contact-card__intro {
  padding: clamp(1.8rem, 4vw, 2.6rem);
  background: linear-gradient(150deg, var(--brand-1), var(--brand-2));
  color: #fff; display: flex; flex-direction: column; justify-content: center;
}
.contact-card__intro h2 {
  font-family: var(--serif); font-size: clamp(1.55rem, 3.4vw, 2.1rem); font-weight: 600;
  margin: 0 0 .55rem; letter-spacing: -.02em; line-height: 1.2; color: #fff;
}
.contact-card__intro .sub { font-size: 1rem; opacity: .93; margin: 0 0 1.1rem; font-weight: 500; }
.contact-card__intro p:last-of-type { font-size: .93rem; opacity: .82; margin: 0 0 1.7rem; }
.contact-card__intro .btn {
  background: #fff; color: #0b4539; align-self: flex-start; box-shadow: none;
}
.contact-card__intro .btn:hover { background: #f0f0f0; }

.contact-card__list { padding: clamp(1.6rem, 3.5vw, 2.3rem); display: grid; gap: 1.15rem; align-content: center; }
.cf__l { font-size: .705rem; font-weight: 700; letter-spacing: .11em; text-transform: uppercase; color: var(--ink-faint); margin: 0 0 .2rem; }
.cf__v { font-size: 1.0rem; color: var(--ink); font-weight: 550; margin: 0; word-break: break-word; }
.cf__v a { color: var(--accent-bright); }

/* ---------- Footer ---------- */

.site-foot {
  border-top: 1px solid var(--line); padding-block: 2.2rem;
  background: var(--paper-tint);
}
.site-foot__inner { display: flex; flex-wrap: wrap; gap: 1rem; justify-content: space-between; align-items: center; }
.site-foot p { margin: 0; font-size: .845rem; color: var(--ink-faint); }
.foot-note { margin-top: .25rem !important; }
.foot-langs { display: flex; gap: .8rem; }
.foot-langs a { font-size: .845rem; color: var(--ink-faint); }
.foot-langs a[aria-current="true"] { color: var(--accent-bright); font-weight: 600; }

/* ---------- Print ---------- */

@media print {
  :root { --paper:#fff; --paper-tint:#fff; --paper-deep:#f4f4f4; --ink:#000; --ink-soft:#333; --ink-faint:#666; --line:#ccc; --line-soft:#e5e5e5; --shadow:none; --shadow-lg:none; }
  .site-head, .site-foot, .case-filters, .btns, .skip, .case__chev,
  .personabar, .agentpanel, .pintro, .case__peek, .theme-btn { display: none !important; }
  [data-p] { display: revert !important; }
  body { font-size: 11pt; }
  .band { padding-block: 1.2rem; }
  .hero { padding-block: 0 1.5rem; background: none; }
  .case[hidden] { display: block !important; }
  .case__body { display: block !important; }
  .case, .cap, .panel, .principle, .pullquote, .step, .clients { break-inside: avoid; box-shadow: none; }
  section { break-before: auto; }
  .contact-card__intro { background: #f4f4f4 !important; color: #000 !important; }
  .contact-card__intro h2 { color: #000 !important; }
  a { color: #000 !important; text-decoration: none; }
}