/* ============================================================
   Login screen — premium redesign (external file, CSP-safe).
   Loaded AFTER styles.css so these rules win. Selectors are kept
   specific (.login-screen …) to override the base .login-screen
   rules without needing !important except where styles.css forces
   it (.primary uses !important).
   ============================================================ */

.login-screen {
  position: fixed;
  z-index: 50;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 24px;
  background:
    radial-gradient(1100px 560px at 12% -12%, #e7f0ff 0%, transparent 55%),
    radial-gradient(950px 520px at 112% 115%, #ffe7e3 0%, transparent 52%),
    linear-gradient(140deg, #f7f9fd 0%, #eef2f9 100%);
}
.login-screen[hidden] { display: none; }

.login-screen section {
  position: relative;
  overflow: hidden;
  width: min(410px, 92vw);
  padding: 42px 38px 30px;
  text-align: center;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 22px;
  box-shadow:
    0 34px 64px -22px rgba(22, 42, 82, .30),
    0 10px 24px -14px rgba(22, 42, 82, .18);
}
/* thin accent bar along the top edge of the card */
.login-screen section::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
  background: linear-gradient(90deg, #2867d5, #5b8def 55%, #cc3e34);
}

.login-screen .brand-mark {
  display: grid;
  place-items: center;
  width: 66px;
  height: 66px;
  margin: 4px auto 0;
  font-size: 30px;
  color: #fff;
  background: linear-gradient(135deg, #2f74e6, #1b4ea8);
  border-radius: 19px;
  box-shadow: 0 12px 24px -8px rgba(40, 103, 213, .6);
}
.login-screen h1 {
  margin: 18px 0 5px;
  font-size: 24px;
  letter-spacing: -.5px;
  color: var(--text);
}
.login-screen p {
  margin: 0 0 26px;
  font-size: 14px;
  color: var(--muted);
}

.login-screen form { display: grid; gap: 16px; text-align: left; }
.login-screen label {
  display: grid;
  gap: 7px;
  font-size: 13px;
  font-weight: 600;
  color: #4a5361;
}
.login-screen input {
  width: 100%;
  height: 46px;
  padding: 0 13px;
  font: 14px/1.2 inherit;
  color: var(--text);
  background: #fbfcfe;
  border: 1.5px solid var(--line);
  border-radius: 11px;
  transition: border-color .15s, box-shadow .15s, background .15s;
}
.login-screen input::placeholder { color: #aab2c0; }
.login-screen input:focus {
  outline: none;
  background: #fff;
  border-color: var(--blue);
  box-shadow: 0 0 0 4px rgba(40, 103, 213, .14);
}

/* ---- password field + eye toggle ---- */
.login-screen .pw-field { position: relative; display: block; }
.login-screen .pw-field input { padding-right: 48px; }
.login-screen .pw-toggle {
  position: absolute;
  top: 0;
  right: 0;
  height: 100%;
  width: 46px;
  margin: 0;
  padding: 0;
  display: grid;
  place-items: center;
  color: #98a0ae;
  background: transparent;
  border: 0;
  border-radius: 0 11px 11px 0;
  cursor: pointer;
  transition: color .15s;
}
.login-screen .pw-toggle:hover { color: var(--blue); }
.login-screen .pw-toggle:focus-visible { outline: 2px solid var(--blue); outline-offset: -2px; }
.login-screen .pw-toggle svg { width: 20px; height: 20px; display: block; }

/* ---- primary submit button (styles.css forces .primary colours with !important) ---- */
.login-screen form button.primary {
  height: 48px;
  width: 100%;
  margin-top: 6px;
  padding: 0;
  font: 600 15px inherit;
  color: #fff !important;
  background: linear-gradient(135deg, #2f74e6, #1f56b8) !important;
  border: 0 !important;
  border-radius: 12px;
  cursor: pointer;
  box-shadow: 0 13px 24px -10px rgba(40, 103, 213, .65);
  transition: transform .12s, box-shadow .15s, filter .15s;
}
.login-screen form button.primary:hover {
  filter: brightness(1.05);
  box-shadow: 0 17px 28px -10px rgba(40, 103, 213, .72);
}
.login-screen form button.primary:active { transform: translateY(1px); }

/* ---- "Quên mật khẩu?" link ---- */
.login-screen .link-btn {
  display: inline-block;
  height: auto;
  width: auto;
  margin: 20px auto 0;
  padding: 6px 10px;
  font: 500 13px inherit;
  color: var(--muted);
  background: transparent;
  border: 0;
  border-radius: 8px;
  cursor: pointer;
  transition: color .15s, background .15s;
}
.login-screen .link-btn:hover { color: var(--blue); background: rgba(40, 103, 213, .08); }

/* ---- forgot-password dialog hint ---- */
.dialog-hint {
  margin: 4px 0 0;
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--muted);
}

@media (max-width: 420px) {
  .login-screen section { padding: 34px 22px 24px; }
}