/* ============================================================
   Trang dang nhap DUNG CHUNG — Phuong Nghia Lo (thiet ke rieng)
   Bo cuc 2 cot: trai = nhan dien, phai = form. Ep light mode.
   ============================================================ */

:root {
  color-scheme: light;
  --navy-950: #081a33;
  --navy-900: #0a2142;
  --navy-800: #0e3161;
  --navy-700: #123d78;
  --gold: #f0b429;
  --blue-600: #1e56c8;
  --blue-700: #1746a8;
  --ink: #101828;
  --muted: #5b6b81;
  --nhat: #8494ab;
  --line: #d5dde9;
  --nen: #ffffff;
}

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

html, body {
  height: 100%;
  font-family: "Segoe UI", "Be Vietnam Pro", Roboto, system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  background: var(--navy-950);
}

.khung {
  display: flex;
  min-height: 100vh;
}

/* ================= PANEL TRAI ================= */

.panel-trai {
  position: relative;
  flex: 0 0 46%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 48px 40px;
  overflow: hidden;
  color: #e8effa;
  background:
    radial-gradient(900px 520px at 78% -10%, rgba(30, 86, 200, .55) 0%, transparent 60%),
    radial-gradient(760px 500px at -12% 108%, rgba(240, 180, 41, .16) 0%, transparent 55%),
    linear-gradient(160deg, var(--navy-800) 0%, var(--navy-900) 55%, var(--navy-950) 100%);
}

/* Hoa tiet ngoi sao chim mo goc duoi */
.trang-tri {
  position: absolute;
  right: -110px;
  bottom: -110px;
  width: 380px;
  height: 380px;
  opacity: .05;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 100'%3E%3Cpath d='M50 2 L61.8 38.2 L100 38.2 L69.1 60.6 L80.9 96.8 L50 74.4 L19.1 96.8 L30.9 60.6 L0 38.2 L38.2 38.2 Z' fill='white'/%3E%3C/svg%3E") no-repeat center / contain;
  pointer-events: none;
}

.panel-noi-dung {
  position: relative;
  max-width: 470px;
  width: 100%;
}

.eyebrow {
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: rgba(232, 239, 250, .72);
  padding-bottom: 14px;
  margin-bottom: 26px;
  border-bottom: 1px solid rgba(240, 180, 41, .45);
  display: inline-block;
}

.huy-hieu { margin-bottom: 20px; }

.ten-cong {
  font-size: 27px;
  font-weight: 800;
  letter-spacing: .015em;
  line-height: 1.25;
  color: #ffffff;
}

.ten-phuong {
  margin-top: 8px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .14em;
  color: var(--gold);
}

.mo-ta {
  margin-top: 16px;
  font-size: 15px;
  line-height: 1.65;
  color: rgba(232, 239, 250, .82);
  max-width: 400px;
}

.ds-hethong {
  list-style: none;
  margin-top: 30px;
  display: grid;
  gap: 10px;
}

.ds-hethong li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14.5px;
  font-weight: 500;
  color: #eef4fc;
  padding: 9px 14px 9px 9px;
  border-radius: 12px;
  background: rgba(255, 255, 255, .055);
  border: 1px solid rgba(255, 255, 255, .09);
  backdrop-filter: blur(2px);
}

.ht-icon {
  flex: 0 0 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border-radius: 9px;
  color: var(--gold);
  background: rgba(240, 180, 41, .1);
  border: 1px solid rgba(240, 180, 41, .22);
}

/* ================= PANEL PHAI ================= */

.panel-phai {
  flex: 1 1 54%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: var(--nen);
  padding: 48px 40px 24px;
}

.hop-form {
  width: 100%;
  max-width: 396px;
  margin: auto 0;
}

.tieu-de {
  font-size: 25px;
  font-weight: 800;
  color: var(--ink);
  letter-spacing: -.01em;
}

.phu-de {
  margin-top: 7px;
  margin-bottom: 28px;
  font-size: 14.5px;
  color: var(--muted);
}

/* Thong bao chung (loi dang nhap, phien het han...) */
.thong-bao {
  margin: 0 0 20px;
  padding: 11px 14px;
  font-size: 13.5px;
  line-height: 1.55;
  border-radius: 10px;
}
.thong-bao--error {
  background: #fef2f2;
  border: 1px solid #fecaca;
  border-left: 3px solid #dc2626;
  color: #b91c1c;
}
.thong-bao--warning {
  background: #fffbeb;
  border: 1px solid #fde68a;
  border-left: 3px solid #d97706;
  color: #92400e;
}
.thong-bao--info, .thong-bao--success {
  background: #eff6ff;
  border: 1px solid #bfdbfe;
  border-left: 3px solid #1e56c8;
  color: #1e40af;
}

/* Form */
.nhom { margin-bottom: 18px; }

.nhom label {
  display: block;
  margin-bottom: 7px;
  font-size: 13.5px;
  font-weight: 600;
  color: #334155;
}

.nhom input[type="text"],
.nhom input[type="password"],
.nhom input[type="email"],
input.o-rong {
  width: 100%;
  height: 46px;
  padding: 0 14px;
  font-size: 15px;
  font-family: inherit;
  color: var(--ink);
  background: #fff;
  border: 1.5px solid var(--line);
  border-radius: 10px;
  transition: border-color .15s, box-shadow .15s;
}
.nhom input:focus {
  outline: none;
  border-color: var(--blue-600);
  box-shadow: 0 0 0 4px rgba(30, 86, 200, .13);
}
.nhom input.o-loi { border-color: #f87171; }
.nhom input.o-loi:focus { box-shadow: 0 0 0 4px rgba(220, 38, 38, .12); }

.loi-truong {
  display: block;
  margin-top: 7px;
  font-size: 13px;
  color: #dc2626;
}

/* O mat khau + nut hien/an */
.o-mat-khau { position: relative; }
.o-mat-khau input { padding-right: 48px; }

.nut-mat {
  position: absolute;
  top: 50%;
  right: 6px;
  transform: translateY(-50%);
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border: none;
  border-radius: 8px;
  background: transparent;
  color: var(--nhat);
  cursor: pointer;
  transition: color .15s, background .15s;
}
.nut-mat:hover { color: var(--blue-600); background: #f0f5ff; }

/* Hang ghi nho / quen mat khau */
.hang-phu {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: -4px 0 20px;
  font-size: 13.5px;
}
.ghi-nho {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--muted);
  cursor: pointer;
}
.ghi-nho input { accent-color: var(--blue-600); width: 15px; height: 15px; }
.quen-mk { font-weight: 600; color: var(--blue-600); text-decoration: none; }
.quen-mk:hover { text-decoration: underline; }

/* Nut dang nhap */
.nut-dn {
  width: 100%;
  height: 48px;
  border: none;
  border-radius: 10px;
  font-family: inherit;
  font-size: 15.5px;
  font-weight: 700;
  letter-spacing: .01em;
  color: #fff;
  cursor: pointer;
  background: linear-gradient(180deg, #2058d8 0%, var(--blue-700) 100%);
  box-shadow: 0 6px 16px rgba(23, 70, 168, .30);
  transition: filter .15s, transform .05s, box-shadow .15s;
}
.nut-dn:hover { filter: brightness(1.07); }
.nut-dn:active { transform: translateY(1px); box-shadow: 0 3px 8px rgba(23, 70, 168, .3); }
.nut-dn:disabled { opacity: .65; cursor: default; }
.nut-dn:focus-visible { outline: 3px solid rgba(30, 86, 200, .35); outline-offset: 2px; }

/* Luu y an ninh */
.luu-y {
  margin-top: 22px;
  font-size: 12.5px;
  line-height: 1.6;
  text-align: center;
  color: var(--nhat);
}

/* Cac khoi phu cua luong khac (OTP, thong tin...) */
.thong-tin { margin-top: 16px; font-size: 14px; color: var(--muted); }
.form-cach-khac { margin-top: 14px; text-align: center; font-size: 13.5px; }
.form-cach-khac a { color: var(--blue-600); font-weight: 600; text-decoration: none; }

/* Cac trang base khac (doi mat khau...) dung input/button tho — style chung */
.hop-form form:not(.form-dn) input[type="text"],
.hop-form form:not(.form-dn) input[type="password"],
.hop-form form:not(.form-dn) input[type="email"],
.hop-form form:not(.form-dn) input[type="tel"] {
  width: 100%;
  height: 46px;
  padding: 0 14px;
  font-size: 15px;
  font-family: inherit;
  color: var(--ink);
  border: 1.5px solid var(--line);
  border-radius: 10px;
  margin: 6px 0 14px;
}
.hop-form form:not(.form-dn) input[type="submit"],
.hop-form form:not(.form-dn) button[type="submit"] {
  width: 100%;
  height: 48px;
  border: none;
  border-radius: 10px;
  font-family: inherit;
  font-size: 15.5px;
  font-weight: 700;
  color: #fff;
  cursor: pointer;
  background: linear-gradient(180deg, #2058d8 0%, var(--blue-700) 100%);
  margin-top: 6px;
}
.hop-form form:not(.form-dn) label { font-size: 13.5px; font-weight: 600; color: #334155; }

/* Chan trang */
.chan-trang {
  margin-top: 36px;
  padding-top: 16px;
  border-top: 1px solid #edf1f7;
  width: 100%;
  max-width: 396px;
  text-align: center;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--nhat);
}
.chan-trang b { color: #43536b; font-weight: 600; }

/* ================= MOBILE ================= */

@media (max-width: 940px) {
  .khung { flex-direction: column; }

  .panel-trai {
    flex: none;
    padding: 34px 24px 28px;
  }
  .panel-noi-dung { max-width: 430px; text-align: center; }
  .eyebrow { margin-bottom: 18px; }
  .huy-hieu svg { width: 56px; height: 56px; }
  .ten-cong { font-size: 21px; }
  .ten-phuong { font-size: 13px; }
  .mo-ta { margin-left: auto; margin-right: auto; font-size: 14px; }

  .ds-hethong {
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 8px;
    margin-top: 22px;
  }
  .ds-hethong li {
    font-size: 12.5px;
    padding: 7px 10px 7px 7px;
    gap: 8px;
  }
  .ht-icon { flex-basis: 30px; height: 30px; }
  .ht-icon svg { width: 15px; height: 15px; }

  .panel-phai { padding: 36px 22px 20px; }
}