/* =====================================================================
   Giao diện chung cho các trang phụ của pinkagc.com:
   /khach/login.php, /khach/index.php, /tai.php
   Cùng hệ màu và font Roboto với trang chủ (home.php).
   ===================================================================== */
:root {
  --ink: #0F0B0D;        /* nền trang */
  --sheet: #171215;      /* nền khối lớn */
  --card: #1E1719;       /* nền ô nhỏ */
  --rule: #2C2427;       /* đường kẻ */
  --rule-2: #5E4F55;     /* đường kẻ khi rê chuột */
  --paper: #FBF4F7;      /* chữ chính */
  --ash: #A2949A;        /* chữ phụ */
  --pink: #E94173;
  --pink-hover: #D42B5E;
  --good: #5DD6C1;
  --warn: #F5C46B;
  --bad: #FF7E9C;
  --info: #7CC4F2;
  --tg: #229ED9;
}
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; min-height: 100vh; display: flex; flex-direction: column;
  background: var(--ink); color: var(--ash);
  font-family: 'Roboto', system-ui, 'Segoe UI', Arial, sans-serif; font-size: 15px; line-height: 1.65;
}
a { color: var(--paper); }
a:focus-visible, button:focus-visible, input:focus-visible { outline: 2px solid var(--pink); outline-offset: 3px; }
::selection { background: var(--pink); color: var(--ink); }
.mono { font-family: 'Roboto Mono', ui-monospace, monospace; }
.wrap { width: 100%; max-width: 1240px; margin: 0 auto; padding-inline: 16px; }
@media (min-width: 768px) { .wrap { padding-inline: 24px; } }

.skip-link { position: absolute; left: 16px; top: -200px; z-index: 100; background: var(--pink); color: var(--ink); font-weight: 500; padding: 12px 18px; border-radius: 5px; text-decoration: none; }
.skip-link:focus { top: 12px; }

/* ---------------- đầu trang ---------------- */
.top { position: sticky; top: 0; z-index: 50; background: var(--ink); border-bottom: 1px solid var(--rule); }
.top .wrap { height: 64px; display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.logo { padding-block: 12px; font-weight: 700; font-size: 20px; letter-spacing: -0.02em; line-height: 1; color: var(--paper); text-decoration: none; }
.logo span { position: relative; display: inline-block; }
.logo span::after { content: ""; position: absolute; left: 0; right: 0; bottom: -4px; height: 3px; background: var(--pink); }
.top-links { display: flex; align-items: center; gap: 22px; font-size: 14px; }
.top-links a:not(.btn) { color: var(--ash); text-decoration: none; padding-block: 10px; transition: color 150ms ease; }
.top-links a:not(.btn):hover { color: var(--paper); }
.top-links a[aria-current="page"] { color: var(--paper); }
@media (max-width: 639px) { .top-links .hide-sm { display: none; } }

/* ---------------- nút ---------------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 44px; padding: 10px 20px; border: 1px solid var(--pink); border-radius: 5px;
  background: var(--pink); color: var(--ink); font: inherit; font-size: 15px; font-weight: 500;
  text-decoration: none; cursor: pointer; box-shadow: 0 6px 20px rgba(233, 65, 115, 0.22);
  transition: background-color 150ms ease, border-color 150ms ease, transform 100ms ease;
}
.btn:hover { background: var(--pink-hover); border-color: var(--pink-hover); color: var(--ink); }
.btn:active { transform: translateY(1px); }
.btn.sm { min-height: 40px; padding: 8px 16px; font-size: 14px; }
.btn.block { display: flex; width: 100%; }
.btn.ghost { background: transparent; border-color: var(--rule); color: var(--paper); box-shadow: none; }
.btn.ghost:hover { border-color: var(--ash); background: transparent; color: var(--paper); }
.btn[disabled] { opacity: 0.45; cursor: not-allowed; transform: none; }
.btn svg { width: 18px; height: 18px; flex: none; }

/* ---------------- thân trang ---------------- */
main { flex: 1; width: 100%; }
.page { padding-block: 48px 72px; }
@media (min-width: 768px) { .page { padding-block: 72px 104px; } }
.eyebrow { display: block; margin: 0 0 14px; font-family: 'Roboto Mono', monospace; font-size: 11px; font-weight: 500; letter-spacing: 0.12em; text-transform: uppercase; color: var(--ash); }
.eyebrow.pink { color: var(--pink); }
h1 { margin: 0 0 12px; font-size: clamp(30px, 5vw, 42px); line-height: 1.1; letter-spacing: -0.02em; font-weight: 700; color: var(--paper); }
h2 { margin: 0 0 6px; font-size: 19px; line-height: 1.3; font-weight: 700; color: var(--paper); }
.lead { margin: 0; font-size: 16px; line-height: 1.7; max-width: 62ch; }
.sub { margin: 0 0 18px; font-size: 14px; line-height: 1.6; }

.card { background: var(--sheet); border: 1px solid var(--rule); border-radius: 14px; padding: 24px; }
@media (min-width: 768px) { .card { padding: 28px; } }
.stack > * + * { margin-top: 16px; }
.cols { display: grid; grid-template-columns: minmax(0, 1fr); gap: 16px; }
@media (min-width: 820px) { .cols { grid-template-columns: repeat(2, minmax(0, 1fr)); } }

.kv { display: flex; justify-content: space-between; align-items: baseline; gap: 16px; padding: 11px 0; border-top: 1px solid var(--rule); font-size: 14px; }
.kv:first-of-type { border-top: 0; padding-top: 0; }
.kv > span:first-child { color: var(--ash); }
.kv > span:last-child { color: var(--paper); font-weight: 500; text-align: right; overflow-wrap: anywhere; }
.quota { margin-top: 10px; font-size: 13px; text-align: center; }
.quota b { color: var(--paper); font-weight: 500; }
.empty { padding: 18px 0; font-size: 14px; text-align: center; }

.flash { margin-bottom: 16px; padding: 12px 16px; border-radius: 10px; border: 1px solid var(--rule); border-left-width: 3px; background: var(--sheet); font-size: 14px; line-height: 1.55; color: var(--paper); }
.flash.good { border-left-color: var(--good); }
.flash.bad { border-left-color: var(--bad); }
.note { padding: 12px 16px; border-radius: 10px; border: 1px solid var(--rule); border-left: 3px solid var(--pink); background: var(--card); font-size: 14px; line-height: 1.6; }
.note b, .note strong { color: var(--paper); font-weight: 500; }

/* ô nhập */
label.field { display: block; margin: 0 0 8px; font-size: 13px; font-weight: 500; color: var(--paper); }
.input {
  width: 100%; height: 48px; padding: 0 14px; border-radius: 10px; border: 1px solid var(--rule);
  background: var(--ink); color: var(--paper); font-family: 'Roboto Mono', monospace; font-size: 14px;
  outline: none; transition: border-color 150ms ease;
}
.input::placeholder { color: #6E6166; }
.input:focus { border-color: var(--pink); }

/* trạng thái key */
.status { display: flex; flex-wrap: wrap; align-items: center; gap: 16px 24px; }
.status-main { flex: 1 1 260px; min-width: 0; }
.status-label { display: flex; align-items: center; gap: 10px; font-size: clamp(22px, 3vw, 26px); font-weight: 700; letter-spacing: -0.01em; line-height: 1.2; color: var(--paper); }
.status-dot { width: 10px; height: 10px; border-radius: 9999px; flex: none; background: var(--ash); box-shadow: 0 0 0 4px rgba(162, 148, 154, 0.15); }
.status.good .status-dot { background: var(--good); box-shadow: 0 0 0 4px rgba(93, 214, 193, 0.15); }
.status.warn .status-dot { background: var(--warn); box-shadow: 0 0 0 4px rgba(245, 196, 107, 0.15); }
.status.bad  .status-dot { background: var(--bad);  box-shadow: 0 0 0 4px rgba(255, 126, 156, 0.15); }
.status.info .status-dot { background: var(--info); box-shadow: 0 0 0 4px rgba(124, 196, 242, 0.15); }
.status.good .status-label { color: var(--good); }
.status.warn .status-label { color: var(--warn); }
.status.bad  .status-label { color: var(--bad); }
.status-left { margin-top: 4px; font-size: 14px; }
.keybox { display: flex; align-items: center; gap: 10px; flex: 1 1 320px; min-width: 0; max-width: 100%; padding: 8px 8px 8px 14px; border: 1px solid var(--rule); border-radius: 10px; background: var(--ink); }
.keybox code { flex: 1; min-width: 0; font-family: 'Roboto Mono', monospace; font-size: 13px; color: var(--paper); overflow-wrap: anywhere; }
.copy { flex: none; min-height: 36px; padding: 6px 12px; border: 1px solid var(--rule); border-radius: 5px; background: var(--card); color: var(--paper); font: inherit; font-size: 13px; font-weight: 500; cursor: pointer; }
.copy:hover { border-color: var(--ash); }

/* bảng lịch sử */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th { padding: 0 12px 10px 0; border-bottom: 1px solid var(--rule); text-align: left; font-family: 'Roboto Mono', monospace; font-size: 11px; font-weight: 500; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ash); white-space: nowrap; }
td { padding: 11px 12px 11px 0; border-bottom: 1px solid var(--rule); color: var(--paper); vertical-align: top; }
tr:last-child td { border-bottom: 0; }
th:last-child, td:last-child { padding-right: 0; text-align: right; }
td.muted { color: var(--ash); }

/* trang tải */
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 20px 0 0; }
.chip { display: inline-flex; align-items: center; gap: 6px; padding: 6px 14px; border: 1px solid var(--rule); border-radius: 9999px; font-family: 'Roboto Mono', monospace; font-size: 11px; line-height: 1.2; color: var(--ash); white-space: nowrap; }
.chip.pink { border-color: var(--pink); color: var(--paper); }
.specs { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); margin: 0 0 22px; border: 1px solid var(--rule); border-radius: 10px; overflow: hidden; }
.spec { padding: 14px 12px; background: var(--card); }
.spec + .spec { border-left: 1px solid var(--rule); }
.spec .k { font-family: 'Roboto Mono', monospace; font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ash); }
.spec .v { margin-top: 4px; font-size: 15px; font-weight: 500; color: var(--paper); overflow-wrap: anywhere; }
@media (max-width: 479px) { .specs { grid-template-columns: minmax(0, 1fr); } .spec + .spec { border-left: 0; border-top: 1px solid var(--rule); } }
.steps { margin: 0; padding: 0; list-style: none; counter-reset: s; }
.steps li { position: relative; padding: 0 0 16px 44px; counter-increment: s; font-size: 14px; line-height: 1.6; }
.steps li:last-child { padding-bottom: 0; }
.steps li::before { content: counter(s); position: absolute; left: 0; top: -2px; width: 30px; height: 30px; border-radius: 9999px; display: inline-flex; align-items: center; justify-content: center; border: 1px solid var(--rule); background: var(--card); font-family: 'Roboto Mono', monospace; font-size: 13px; color: var(--paper); }
.steps li strong { color: var(--paper); font-weight: 500; }
.inline-link { color: var(--paper); text-decoration: underline; text-decoration-color: var(--pink); text-underline-offset: 4px; padding-block: 8px; margin-block: -8px; }
.inline-link:hover { color: var(--pink); }

/* trang đăng nhập */
.login { max-width: 520px; margin: 0 auto; }
.login .lead { margin-bottom: 24px; }
.login-help { margin: 20px 0 0; font-size: 14px; }

/* trang tài khoản */
.acct-head { display: flex; flex-wrap: wrap; align-items: flex-end; justify-content: space-between; gap: 12px 24px; margin-bottom: 24px; }
.acct-head h1 { margin-bottom: 0; }
.acct-plan { margin-top: 16px; }

/* ---------------- chân trang ---------------- */
.foot { border-top: 1px solid var(--rule); background: var(--sheet); padding-block: 28px 96px; font-size: 13px; }
.foot .wrap { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 10px 24px; }
.foot nav { display: flex; flex-wrap: wrap; gap: 0 20px; }
.foot a { color: var(--ash); text-decoration: none; padding-block: 10px; }
.foot a:hover { color: var(--paper); }
/* chừa chỗ cho nút Telegram nổi (rộng ~182px, cách mép phải 24px) để không đè lên link chân trang */
@media (min-width: 768px) { .foot .wrap { padding-right: 232px; } }

/* ---------------- nút Telegram nổi ---------------- */
.tg-fab {
  position: fixed; z-index: 60;
  right: max(16px, env(safe-area-inset-right)); bottom: max(16px, calc(env(safe-area-inset-bottom) + 12px));
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  width: 56px; height: 56px; border-radius: 9999px; background: var(--tg); color: #FFFFFF; text-decoration: none;
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.45), 0 0 0 1px rgba(255, 255, 255, 0.14) inset;
  transition: transform 150ms ease, background-color 150ms ease;
}
.tg-fab:hover { background: #1B8DC4; transform: translateY(-2px); color: #FFFFFF; }
.tg-fab:focus-visible { outline: 3px solid var(--paper); outline-offset: 3px; }
.tg-fab svg { flex: none; margin-left: -2px; }
.tg-fab-text { display: none; font-size: 15px; font-weight: 500; white-space: nowrap; }
@media (min-width: 768px) { .tg-fab { width: auto; padding: 0 22px 0 18px; right: 24px; bottom: 24px; } .tg-fab-text { display: inline; } }

@media (prefers-reduced-motion: reduce) { *, *::before, *::after { transition: none !important; animation: none !important; } }