/* event.ifagent.net — trang giới thiệu + card visit. Nền tối theo brand IF Agent. */
:root {
  --bg: #0d1117;
  --bg-2: #121a24;
  --line: #233041;
  --fg: #e8eef5;
  --fg-2: #9fb0c3;
  --fg-3: #6f8296;
  --blue: #0088ff;
  --teal: #00d4aa;
  --grad: linear-gradient(100deg, var(--blue), var(--teal));
  --radius: 14px;
  --sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --display: "Outfit", "Inter", system-ui, sans-serif;
  color-scheme: dark;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.6 var(--sans);
  -webkit-font-smoothing: antialiased;
}
a { color: var(--teal); }
img, svg { max-width: 100%; }
h1, h2, h3 { font-family: var(--display); line-height: 1.15; margin: 0; text-wrap: balance; }
p { margin: 0; }

.wrap { max-width: 1120px; margin: 0 auto; padding-inline: 20px; }
.section { padding-block: 72px; border-top: 1px solid var(--line); }
.eyebrow {
  font: 600 12px/1 var(--sans);
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--teal);
}
.section-head { display: grid; gap: 12px; max-width: 46rem; margin-bottom: 36px; }
.section-head h2 { font-size: clamp(28px, 4vw, 40px); font-weight: 600; }
.section-head p { color: var(--fg-2); }
.grad-text { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }

/* Thanh trên cùng */
.topbar {
  position: sticky; top: 0; z-index: 5;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.topbar .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; height: 60px; }
.wordmark { font: 700 20px/1 var(--display); color: var(--fg); text-decoration: none; letter-spacing: -.01em; }
.wordmark span { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.nav { display: flex; gap: 20px; font-size: 14px; }
.nav a { color: var(--fg-2); text-decoration: none; }
.nav a:hover { color: var(--fg); }
@media (max-width: 720px) { .nav a:not(.btn) { display: none; } }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 11px 18px; border-radius: 999px;
  font: 600 15px/1 var(--sans); text-decoration: none;
  border: 1px solid var(--line); color: var(--fg); background: var(--bg-2);
}
.btn.primary { background: var(--grad); color: #04121a; border: 0; }
.nav .btn { padding: 8px 14px; font-size: 14px; }

/* Hero */
.hero { padding-block: 88px 64px; position: relative; overflow: hidden; }
.hero::before {
  content: ""; position: absolute; inset: -40% -10% auto auto; width: 640px; height: 640px;
  background: radial-gradient(circle, color-mix(in srgb, var(--teal) 22%, transparent), transparent 65%);
  pointer-events: none;
}
.hero .wrap { position: relative; display: grid; gap: 28px; }
.hero h1 { font-size: clamp(38px, 7vw, 76px); font-weight: 700; letter-spacing: -.02em; max-width: 15ch; }
.hero .lead { font-size: clamp(17px, 2vw, 20px); color: var(--fg-2); max-width: 40rem; }
.cta { display: flex; flex-wrap: wrap; gap: 12px; }
.event-chip {
  display: inline-flex; flex-wrap: wrap; gap: 6px 14px; align-items: center; width: fit-content; max-width: 100%;
  padding: 10px 16px; border: 1px solid var(--line); border-radius: 999px; background: var(--bg-2);
  font-size: 14px; color: var(--fg-2);
}
.event-chip b { color: var(--fg); }
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--teal); box-shadow: 0 0 0 4px color-mix(in srgb, var(--teal) 25%, transparent); }

/* Số liệu */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.stat { background: var(--bg); padding: 24px; display: grid; gap: 6px; }
.stat b { font: 700 clamp(34px, 5vw, 46px)/1 var(--display); font-variant-numeric: tabular-nums; }
.stat span { color: var(--fg-2); font-size: 14px; }

/* Module */
.modules { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 16px; }
.module { padding: 24px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--bg-2); display: grid; gap: 10px; align-content: start; min-width: 0; }
.module .num { font: 600 13px/1 var(--display); color: var(--fg-3); font-variant-numeric: tabular-nums; }
.module h3 { font-size: 21px; font-weight: 600; }
.module .tag { color: var(--teal); font-size: 14px; font-weight: 500; }
.module p { color: var(--fg-2); font-size: 15px; }
.module .spec { margin-top: 4px; font-size: 13px; color: var(--fg-3); border-top: 1px dashed var(--line); padding-top: 10px; }

/* Nhân vật demo */
.cast { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 16px; }
.persona { padding: 22px; border-radius: var(--radius); border: 1px solid var(--line); display: grid; gap: 6px; min-width: 0;
  background: linear-gradient(180deg, color-mix(in srgb, var(--blue) 10%, var(--bg-2)), var(--bg-2)); }
.persona h3 { font-size: 24px; }
.persona .role { color: var(--teal); font-size: 14px; }
.persona p { color: var(--fg-2); font-size: 15px; }

/* Showcase */
.showcase { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 16px; }
.case { padding: 22px; border-left: 3px solid var(--blue); background: var(--bg-2); border-radius: 0 var(--radius) var(--radius) 0; display: grid; gap: 6px; align-content: start; min-width: 0; }
.case .client { font-size: 12px; letter-spacing: .12em; text-transform: uppercase; color: var(--fg-3); }
.case h3 { font-size: 20px; font-weight: 600; }
.case .metric { font: 700 28px/1.1 var(--display); color: var(--teal); font-variant-numeric: tabular-nums; }
.case p { color: var(--fg-2); font-size: 14px; }
.awards { margin-top: 28px; display: flex; flex-wrap: wrap; gap: 12px; }
.award { padding: 12px 16px; border: 1px solid var(--line); border-radius: 10px; font-size: 14px; color: var(--fg-2); }
.award b { color: var(--fg); display: block; font-family: var(--display); font-size: 16px; }

/* Triển khai */
.modes { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; }
.mode { padding: 24px; border-radius: var(--radius); border: 1px solid var(--line); display: grid; gap: 8px; align-content: start; }
.mode h3 { font-size: 20px; }
.mode p { color: var(--fg-2); font-size: 15px; }
.mode .fit { font-size: 13px; color: var(--fg-3); }

/* Quy trình */
.steps { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 12px; counter-reset: s; }
.steps li { counter-increment: s; padding: 18px; border-top: 2px solid var(--line); display: grid; gap: 6px; font-weight: 500; }
.steps li::before { content: counter(s, decimal-leading-zero); font: 700 22px/1 var(--display); color: var(--blue); }
.note { margin-top: 20px; color: var(--fg-2); font-size: 15px; }

/* Liên hệ + card visit */
.contact { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); gap: 32px; align-items: center; }
@media (max-width: 820px) { .contact { grid-template-columns: 1fr; } }
.contact h2 { font-size: clamp(28px, 4vw, 40px); }
.contact .lead { color: var(--fg-2); margin-top: 12px; }

.vcard {
  border-radius: 20px; padding: 26px; display: grid; gap: 18px;
  background: linear-gradient(150deg, #10233a, var(--bg-2) 55%);
  border: 1px solid var(--line);
  box-shadow: 0 30px 60px -30px color-mix(in srgb, var(--blue) 45%, transparent);
  max-width: 440px; width: 100%;
}
.vcard .who h3, .vcard .who .h3 { font-size: 28px; }
.vcard .who .title { color: var(--teal); font-weight: 500; }
.vcard dl { margin: 0; display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 8px 14px; font-size: 15px; }
.vcard dt { color: var(--fg-3); font-size: 13px; text-transform: uppercase; letter-spacing: .08em; padding-top: 2px; }
.vcard dd { margin: 0; overflow-wrap: anywhere; font-variant-numeric: tabular-nums; }
.vcard dd a { color: var(--fg); text-decoration: none; border-bottom: 1px solid var(--line); }
.qr-row { display: flex; gap: 16px; align-items: center; }
.qr { background: #fff; border-radius: 12px; padding: 8px; width: 132px; flex: none; }
.qr img { display: block; width: 100%; height: auto; image-rendering: pixelated; }
.qr-row p { color: var(--fg-2); font-size: 14px; }
.card-actions { display: flex; flex-wrap: wrap; gap: 10px; }

.footer { padding-block: 32px; border-top: 1px solid var(--line); color: var(--fg-3); font-size: 14px; }
.footer .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; }

/* Trang /hang: card toàn màn hình để Hằng đưa khách quét */
.card-page { min-height: 100vh; display: grid; place-items: center; padding: 24px 16px; }
.card-page .vcard { max-width: 420px; }
.card-page .qr { width: 168px; }
.card-page .back { color: var(--fg-3); font-size: 14px; text-align: center; }
.qr-switch { display: flex; gap: 8px; }
.qr-switch button {
  flex: 1; padding: 8px 10px; border-radius: 999px; border: 1px solid var(--line);
  background: transparent; color: var(--fg-2); font: 500 13px/1 var(--sans); cursor: pointer;
}
.qr-switch button[aria-pressed="true"] { background: var(--fg); color: var(--bg); border-color: var(--fg); }
.card-page .lead { color: var(--fg-2); font-size: 15px; }