/* =============================================================================
   HE THIET KE CHUNG
   Dung cho moi trang: trang chu, trang Tien ich, va tung module ben trong.

   Trang nao cung nap base.css truoc, roi moi nap CSS rieng cua no.
   Doi mau toan he thong = doi cac bien trong :root ben duoi, khong sua cho khac.
   ============================================================================= */

:root {
  /* --- Xanh la chu dao --- */
  --green-900: #0f3d24;
  --green-800: #14532d;
  --green-700: #1a6638;
  --green-600: #1f8544;
  --green-500: #22a44e;
  --green-400: #4ec27a;
  --green-100: #dff0e4;
  --green-50:  #eef7f0;

  /* --- Nen va chu --- */
  --bg: #f4f7f1;
  --bg-alt: #eaf0e5;
  --surface: #ffffff;
  --surface-2: #f5f8f3;
  --ink: #17251d;
  --ink-1: #2b3a31;   /* chua tung duoc dinh nghia: moi cho goi no deu roi ve thua ke */
  --ink-2: #4d5c53;
  /* Do duoc: #8a988f chi dat 3.01:1 tren nen trang, duoi chuan 4.5:1 — ma day
     la mau cua gan het chu huong dan nho. #616f66 dat 4.86-5.28:1 tren ca bon
     nen dang dung. */
  --ink-3: #616f66;
  --line: #dfe7da;
  --line-strong: #7d8c83;

  /* --- Trang thai --- */
  --warn-bg: #fff6e5;
  --warn-line: #e8c98a;
  --warn-ink: #7a5a12;
  --info-bg: #e8f2ec;
  --info-line: #bcd9c7;
  --info-ink: #1a6638;
  --danger: #b23b3b;

  /* --- Hinh khoi --- */
  --radius-sm: 10px;
  --radius: 16px;
  --radius-lg: 22px;
  --radius-pill: 999px;
  --shadow-sm: 0 1px 2px rgba(15, 61, 36, .05), 0 4px 12px rgba(15, 61, 36, .05);
  --shadow: 0 2px 4px rgba(15, 61, 36, .05), 0 14px 34px rgba(15, 61, 36, .08);
  --wrap: 1180px;
  --wrap-narrow: 820px;

  color-scheme: light;
}

* { box-sizing: border-box; }

/* Phai dat truoc moi luat display khac: thuoc tinh hidden cua HTML chi la
   display:none cua trinh duyet, nen bat ky luat nao co display deu de len no. */
[hidden] { display: none !important; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

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

.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 20px; }
.wrap-narrow { width: 100%; max-width: var(--wrap-narrow); margin: 0 auto; padding: 0 20px; }

/* ---------------------------------------------------------------------------
   Chu
   --------------------------------------------------------------------------- */
.eyebrow {
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: .13em;
  text-transform: uppercase;
  color: var(--green-600);
  margin: 0 0 14px;
}
.h1 {
  font-size: clamp(29px, 4.4vw, 44px);
  line-height: 1.12;
  font-weight: 750;
  letter-spacing: -.022em;
  margin: 0;
}
.h2 {
  font-size: clamp(24px, 3.6vw, 36px);
  line-height: 1.2;
  font-weight: 720;
  letter-spacing: -.018em;
  margin: 0;
}
.h3 { font-size: 18px; font-weight: 680; line-height: 1.35; margin: 0; letter-spacing: -.01em; }
.lead { font-size: 16.5px; color: var(--ink-2); margin: 16px 0 0; max-width: 56ch; }
.muted { color: var(--ink-2); }
.accent { color: var(--green-600); }

/* ---------------------------------------------------------------------------
   Nut
   --------------------------------------------------------------------------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  padding: 13px 22px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--line-strong);
  background: var(--surface);
  color: var(--ink);
  font: inherit; font-size: 15px; font-weight: 640;
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  transition: background .15s, border-color .15s, transform .12s, box-shadow .15s, opacity .15s;
}
.btn:hover { background: var(--surface-2); border-color: var(--ink-3); }
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn-icon { width: 19px; height: 19px; flex: none; }

.btn-primary {
  background: var(--green-700);
  border-color: var(--green-700);
  color: #fff;
  box-shadow: 0 2px 10px rgba(26, 102, 56, .25);
}
.btn-primary:hover { background: var(--green-800); border-color: var(--green-800); }

.btn-accent {
  background: var(--green-500);
  border-color: var(--green-500);
  color: #fff;
  box-shadow: 0 2px 12px rgba(34, 164, 78, .3);
}
.btn-accent:hover { background: var(--green-600); border-color: var(--green-600); }

.btn-ghost { background: transparent; border-color: transparent; }
.btn-ghost:hover { background: rgba(26, 102, 56, .07); border-color: transparent; }

.btn-block { width: 100%; }
.btn-sm { padding: 9px 16px; font-size: 14px; }

.link-btn {
  background: none; border: 0; padding: 0;
  color: var(--ink-2); font: inherit; font-size: 14px;
  text-decoration: underline; text-underline-offset: 3px;
  cursor: pointer;
}
.link-btn:hover { color: var(--green-700); }
.link-btn.danger { color: var(--danger); }

/* ---------------------------------------------------------------------------
   Thanh dieu huong
   --------------------------------------------------------------------------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, .92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav {
  display: flex; align-items: center; gap: 18px;
  min-height: 66px;
}
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; flex: 0 1 auto; min-width: 0; }
.brand-logo {
  height: 34px; flex: none;
  padding: 0 12px;
  border-radius: 9px;
  background: var(--green-700);
  color: #fff;
  display: grid; place-items: center;
  font-weight: 800; font-size: 15px; letter-spacing: .08em;
}
.brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.brand-sub { font-size: 9.5px; letter-spacing: .14em; color: var(--ink-3); text-transform: uppercase; font-weight: 600; }

.nav-links { display: none; align-items: center; gap: 4px; margin-left: auto; }
@media (min-width: 960px) { .nav-links { display: flex; } }

.nav-link {
  position: relative;
  padding: 9px 13px;
  border-radius: var(--radius-sm);
  font-size: 14.5px; font-weight: 580;
  color: var(--ink-2);
  text-decoration: none;
  background: none; border: 0; font-family: inherit; cursor: pointer;
  display: inline-flex; align-items: center; gap: 5px;
}
.nav-link:hover { color: var(--green-700); background: var(--green-50); }
.nav-link.is-active { color: var(--green-800); font-weight: 660; }
.nav-caret { width: 14px; height: 14px; transition: transform .18s; }
.nav-item.is-open .nav-caret { transform: rotate(180deg); }

/* Nut mui ten nam canh chu, chi de mo bang xo xuong. Ban than chu la link. */
.nav-caret-btn {
  display: inline-grid; place-items: center;
  width: 26px; height: 30px; margin-left: -6px;
  border: 0; background: none; padding: 0;
  color: var(--ink-2); cursor: pointer;
  border-radius: var(--radius-sm);
}
.nav-caret-btn:hover { color: var(--green-700); background: var(--green-50); }

.nav-item { position: relative; display: inline-flex; align-items: center; }
.nav-menu {
  position: absolute; top: calc(100% + 8px); left: 0;
  min-width: 310px;
  max-height: calc(100vh - 96px); overflow-y: auto;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 8px;
  z-index: 60;
}
.nav-menu-item {
  display: flex; gap: 11px; align-items: flex-start;
  padding: 11px 12px;
  border-radius: var(--radius-sm);
  text-decoration: none;
  color: inherit;
}
.nav-menu-item:hover { background: var(--green-50); }
.nav-menu-item.is-soon { opacity: .58; cursor: default; pointer-events: none; }
.nav-menu-icon {
  width: 34px; height: 34px; flex: none;
  border-radius: 9px;
  background: var(--green-50);
  color: var(--green-700);
  display: grid; place-items: center;
}
.nav-menu-icon svg { width: 18px; height: 18px; }
.nav-menu-name { font-size: 14.5px; font-weight: 640; display: flex; align-items: center; gap: 7px; }
.nav-menu-desc { font-size: 12.5px; color: var(--ink-2); margin-top: 2px; line-height: 1.45; }

.nav-menu-all {
  display: flex; align-items: center; justify-content: center; gap: 7px;
  margin-top: 6px; padding: 10px 12px;
  border-top: 1px solid var(--line);
  font-size: 13.5px; font-weight: 620;
  color: var(--green-700); text-decoration: none;
}
.nav-menu-all:hover { background: var(--green-50); }
.nav-menu-arrow { width: 16px; height: 16px; }

.pill-soon {
  font-size: 10px; font-weight: 700; letter-spacing: .05em; text-transform: uppercase;
  background: var(--warn-bg); color: var(--warn-ink);
  border: 1px solid var(--warn-line);
  border-radius: var(--radius-pill);
  padding: 1px 7px;
}

.nav-actions { display: flex; align-items: center; gap: 10px; margin-left: auto; }
@media (min-width: 960px) { .nav-actions { margin-left: 14px; } }

/* O dem luot con lai, cac module tu dien vao */
.quota-chip {
  font-size: 12.5px;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--ink-2);
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  padding: 5px 12px;
  white-space: nowrap;
}
/* Man hep: o dem duoc phep co lai thay vi day thanh dau trang tran ra ngoai */
@media (max-width: 560px) {
  .nav-actions { min-width: 0; gap: 8px; flex: none; }
  .quota-chip { flex: 0 1 auto; }
  .brand-text { min-width: 0; }
  .brand-sub { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
}
/* Dien thoai hep: dong ta thuong hieu la chu trang tri, bo di de con cho cho
   o dem luot va nut menu. Khong bo thi thanh dau trang day ca nut menu ra
   ngoai man hinh va khach khong bam duoc vao dau. */
@media (max-width: 430px) {
  .brand-sub { display: none; }
}
.quota-chip.is-owner {
  background: var(--warn-bg);
  border-color: var(--warn-line);
  color: var(--warn-ink);
  font-weight: 620;
}
/* Man hinh hep thi giau nut CTA de con cho cho o dem luot */
@media (max-width: 560px) { .nav-cta { display: none; } }

.nav-toggle {
  display: grid; place-items: center;
  /* flex: none — khong co thi tren trang tien ich (tieu de dai) no bi ep con
     14px be ngang, cham vao la truot. */
  flex: 0 0 auto;
  width: 44px; height: 44px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  background: var(--surface);
  cursor: pointer;
}
@media (min-width: 960px) { .nav-toggle { display: none; } }
.nav-toggle svg { width: 20px; height: 20px; }

.nav-mobile {
  border-top: 1px solid var(--line);
  background: var(--surface);
  padding: 10px 0 16px;
}
@media (min-width: 960px) { .nav-mobile { display: none !important; } }
.nav-mobile-link {
  display: block;
  padding: 11px 4px;
  font-size: 15.5px; font-weight: 600;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
}
.nav-mobile-sub {
  display: block;
  padding: 9px 4px 9px 16px;
  font-size: 14.5px;
  color: var(--ink-2);
  text-decoration: none;
}

/* ---------------------------------------------------------------------------
   The
   --------------------------------------------------------------------------- */
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
}
.card-hover { transition: transform .15s, box-shadow .15s, border-color .15s; }
.card-hover:hover { transform: translateY(-2px); box-shadow: var(--shadow); border-color: var(--line-strong); }

.icon-badge {
  width: 44px; height: 44px;
  border-radius: 12px;
  background: var(--green-50);
  color: var(--green-700);
  display: grid; place-items: center;
  margin-bottom: 14px;
}
.icon-badge svg { width: 22px; height: 22px; }

/* ---------------------------------------------------------------------------
   Muc
   --------------------------------------------------------------------------- */
.section { padding: 64px 0; }
.section-dark {
  background: var(--green-800);
  color: #fff;
}
.section-dark .eyebrow { color: var(--green-400); }
.section-dark .lead { color: rgba(255, 255, 255, .82); }
.section-head { max-width: 62ch; }
.section-head .lead { margin-top: 12px; }

/* ---------------------------------------------------------------------------
   Chan trang
   --------------------------------------------------------------------------- */
.site-footer {
  background: var(--green-900);
  color: rgba(255, 255, 255, .74);
  padding: 46px 0 30px;
  margin-top: 70px;
  font-size: 14px;
}
.site-footer .brand-sub { color: rgba(255, 255, 255, .74); }
.site-footer .brand-logo { background: var(--green-600); }
.footer-grid {
  display: grid;
  gap: 30px;
  grid-template-columns: 1fr;
}
@media (min-width: 760px) { .footer-grid { grid-template-columns: 1.4fr 1fr 1fr; } }
.footer-title {
  color: #fff; font-size: 13px; font-weight: 700;
  letter-spacing: .08em; text-transform: uppercase;
  margin: 0 0 12px;
}
.footer-list { list-style: none; margin: 0; padding: 0; }
.footer-list li { margin-bottom: 8px; }
.footer-list a { color: rgba(255, 255, 255, .74); text-decoration: none; }
.footer-list a:hover { color: #fff; }
.footer-note {
  margin-top: 30px; padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, .14);
  font-size: 12.5px;
  color: rgba(255, 255, 255, .55);
}
.footer-note p { margin: 0 0 5px; }

/* ---------------------------------------------------------------------------
   Tien ich chung
   --------------------------------------------------------------------------- */
.stack-sm > * + * { margin-top: 8px; }
.center { text-align: center; }

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: .01ms !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
}

/* --- Cong nang mong muon: khac han dong nhan dien hien trang ben tren ------ */
.use-row { margin-top: 12px; }
.use-label {
  display: block; margin-bottom: 6px;
  font-size: 13px; font-weight: 620; color: var(--ink-2);
}
.use-select {
  width: 100%; min-height: 46px;
  padding: 10px 12px;
  border: 1px solid var(--line); border-radius: var(--radius-sm);
  background: var(--surface); color: var(--ink-1);
  font: inherit; font-size: 15px;
}
.use-select:focus { outline: 2px solid var(--green-500); outline-offset: 1px; }
.use-row.is-changed .use-select { border-color: var(--green-500); background: var(--green-50); }
.use-auto {
  margin: 7px 0 0; font-size: 12.5px; line-height: 1.45;
  color: var(--green-700);
}