/* Màn đăng nhập — chuyển từ designs/sms-brandname-login.html (thiết kế AI Agent).
   Chỉ nạp ở màn đăng nhập, không nạp chung với app.css vì trùng tên lớp (.sb-card, .sb-btn…). */

.sb-body [hidden] { display: none !important; }
.sb-body.is-login { padding-left: 0; }

.sb-html,
.sb-body {
  margin: 0;
  min-width: 320px;
  min-height: 100%;
}

.sb-body {
  --red:#9C0006;
  --red-hover:#82000A;
  --red-soft:#FFF1F2;
  --ink:#101828;
  --ink2:#475467;
  --muted:#667085;
  --faint:#98A2B3;
  --line:#E9EEF5;
  --line2:#D9E2EC;
  --bg:#F6F7F9;
  --danger:#B42318;
  --danger-bg:#FEE4E2;
  --danger-line:#F04438;
  --info:#175CD3;
  --info-bg:#E8F2FF;
  --focus-line:#F08A93;
  --focus-ring:#FDE7EA;
  --brand-from:#B3000A;
  --brand-to:#7A0005;

  min-height: 100vh;
  font: 14px/1.45 "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  font-feature-settings: "tnum" 1;
  color: var(--ink);
  background: var(--bg);
}

.sb-body *,
.sb-body *::before,
.sb-body *::after {
  box-sizing: border-box;
}

.sb-login {
  min-height: 100vh;
  display: grid;
  grid-template-columns: minmax(0, 55fr) minmax(480px, 45fr);
  overflow: hidden;
  background: var(--bg);
}

.sb-brand {
  position: relative;
  overflow: hidden;
  min-width: 0;
  display: flex;
  align-items: center;
  padding: clamp(42px, 6vw, 86px);
  color: #fff;
  background: linear-gradient(145deg, var(--brand-from) 0%, var(--brand-to) 100%);
}

.sb-brand-inner {
  position: relative;
  z-index: 2;
  width: min(590px, 100%);
}

.sb-brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border: 1px solid rgba(255,255,255,.28);
  border-radius: 12px;
  background: rgba(255,255,255,.12);
  color: #fff;
  font-size: 21px;
  font-weight: 800;
  letter-spacing: -.04em;
  backdrop-filter: blur(6px);
}

.sb-brand-title {
  margin: 24px 0 0;
  color: #fff;
  font-size: clamp(34px, 3.2vw, 48px);
  line-height: 1.08;
  font-weight: 800;
  letter-spacing: -.035em;
}

.sb-brand-desc {
  max-width: 520px;
  margin: 16px 0 0;
  color: rgba(255,255,255,.82);
  font-size: 16px;
  line-height: 1.7;
}

.sb-brand-chip {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin-top: 28px;
  padding: 8px 12px;
  border: 1px solid rgba(255,255,255,.2);
  border-radius: 999px;
  background: rgba(255,255,255,.09);
  color: rgba(255,255,255,.9);
  font-size: 12.5px;
  font-weight: 600;
}

.sb-brand-chip-dot {
  width: 7px;
  height: 7px;
  border-radius: 999px;
  background: #fff;
  box-shadow: 0 0 0 4px rgba(255,255,255,.12);
}

.sb-brand-art {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  opacity: .8;
}

.sb-main {
  min-width: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--bg);
}

.sb-main-center {
  flex: 1;
  min-height: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 32px;
}

.sb-card-wrap {
  width: min(400px, 100%);
}

.sb-card {
  width: 100%;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
}

.sb-heading {
  margin: 0;
  color: var(--ink);
  font-size: 26px;
  line-height: 1.2;
  font-weight: 800;
  letter-spacing: -.02em;
}

.sb-subheading {
  margin: 7px 0 0;
  color: var(--ink2);
  font-size: 14px;
}

.sb-alert {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-top: 18px;
  padding: 11px 12px;
  border: 1px solid transparent;
  border-radius: 10px;
  font-size: 13px;
  line-height: 1.5;
}

.sb-alert[hidden] {
  display: none;
}

.sb-alert-icon {
  flex: 0 0 auto;
  margin-top: 1px;
  font-size: 14px;
}

.sb-alert-danger {
  border-color: #FDA29B;
  background: var(--danger-bg);
  color: var(--danger);
}

.sb-alert-info {
  border-color: #B2CCFF;
  background: var(--info-bg);
  color: var(--info);
}

.sb-form {
  margin-top: 22px;
}

.sb-field + .sb-field {
  margin-top: 16px;
}

.sb-label {
  display: inline-block;
  margin-bottom: 7px;
  color: var(--ink);
  font-size: 13.5px;
  font-weight: 600;
}

.sb-input-wrap {
  position: relative;
}

.sb-input-icon {
  position: absolute;
  top: 50%;
  left: 13px;
  z-index: 1;
  transform: translateY(-50%);
  color: var(--faint);
  font-size: 13px;
  pointer-events: none;
}

.sb-input {
  width: 100%;
  height: 40px;
  padding: 0 42px 0 38px;
  border: 1px solid var(--line2);
  border-radius: 10px;
  outline: none;
  background: #fff;
  color: var(--ink);
  font: inherit;
  font-size: 14px;
  transition: border-color .15s ease, box-shadow .15s ease, background .15s ease;
}

.sb-input::placeholder {
  color: var(--faint);
}

.sb-input:hover {
  border-color: #C5D0DC;
}

.sb-input:focus,
.sb-input.sb-force-focus {
  border-color: var(--focus-line);
  box-shadow: 0 0 0 3px var(--focus-ring);
}

.sb-input.sb-is-error {
  border-color: var(--danger-line);
  box-shadow: none;
  background: #FFFDFC;
}

.sb-input:disabled {
  background: #F8FAFC;
  color: var(--muted);
  cursor: not-allowed;
}

.sb-password-toggle {
  position: absolute;
  top: 50%;
  right: 4px;
  transform: translateY(-50%);
  width: 34px;
  height: 34px;
  padding: 0;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
}

.sb-password-toggle:hover {
  background: #F2F4F7;
  color: var(--ink2);
}

.sb-password-toggle:focus-visible,
.sb-checkbox:focus-visible,
.sb-btn:focus-visible {
  outline: 2px solid var(--focus-line);
  outline-offset: 2px;
}

.sb-error-text {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 6px;
  color: var(--danger);
  font-size: 12.5px;
  font-weight: 500;
}

.sb-error-text[hidden] {
  display: none;
}

.sb-form-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 15px;
}

.sb-check-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--ink2);
  font-size: 13.5px;
  cursor: pointer;
  user-select: none;
}

.sb-checkbox {
  width: 16px;
  height: 16px;
  margin: 0;
  accent-color: var(--red);
  cursor: pointer;
}

.sb-btn {
  width: 100%;
  height: 40px;
  margin-top: 20px;
  padding: 0 15px;
  border: 1px solid var(--red);
  border-radius: 10px;
  background: var(--red);
  color: #fff;
  font: inherit;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  transition: background .15s ease, border-color .15s ease, opacity .15s ease;
}

.sb-btn:hover:not(:disabled) {
  border-color: var(--red-hover);
  background: var(--red-hover);
}

.sb-btn:disabled {
  border-color: #B8C4D6;
  background: #B8C4D6;
  color: #fff;
  cursor: not-allowed;
}

.sb-btn-content {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.sb-help {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 12.5px;
  line-height: 1.55;
  text-align: center;
}

.sb-footer {
  flex: 0 0 auto;
  padding: 0 32px 22px;
  color: var(--faint);
  font-size: 12px;
  text-align: center;
}

.sb-mobile-brand {
  display: none;
}

@media (max-width: 1440px) {
  .sb-brand {
    padding: 54px;
  }

  .sb-brand-title {
    font-size: 38px;
  }

  .sb-brand-desc {
    font-size: 15px;
  }

  .sb-main-center {
    padding: 24px;
  }

  .sb-card {
    padding: 24px;
  }

  .sb-heading {
    font-size: 22px;
  }

  .sb-subheading {
    font-size: 13px;
  }

  .sb-field + .sb-field {
    margin-top: 14px;
  }

  .sb-form {
    margin-top: 20px;
  }

  .sb-btn {
    margin-top: 18px;
  }
}

@media (max-height: 820px) and (min-width: 768px) {
  .sb-brand-mark {
    width: 50px;
    height: 50px;
  }

  .sb-brand-title {
    margin-top: 18px;
    font-size: 34px;
  }

  .sb-brand-desc {
    margin-top: 12px;
  }

  .sb-brand-chip {
    margin-top: 20px;
  }

  .sb-main-center {
    padding-top: 18px;
    padding-bottom: 14px;
  }

  .sb-card {
    padding: 22px 24px;
  }

  .sb-alert {
    margin-top: 14px;
  }

  .sb-form {
    margin-top: 17px;
  }

  .sb-field + .sb-field {
    margin-top: 12px;
  }

  .sb-form-row {
    margin-top: 12px;
  }

  .sb-btn {
    margin-top: 15px;
  }

  .sb-help {
    margin-top: 11px;
  }

  .sb-footer {
    padding-bottom: 14px;
  }
}

@media (max-width: 1023px) and (min-width: 768px) {
  .sb-login {
    grid-template-columns: 46fr 54fr;
  }

  .sb-brand {
    padding: 38px;
  }

  .sb-brand-title {
    font-size: 32px;
  }
}

@media (max-width: 767px) {
  .sb-body {
    min-height: 100svh;
  }

  .sb-login {
    min-height: 100svh;
    display: block;
    overflow: visible;
  }

  .sb-brand {
    display: none;
  }

  .sb-main {
    min-height: 100svh;
  }

  .sb-mobile-brand {
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    min-height: 120px;
    padding: 20px 16px;
    background: linear-gradient(145deg, var(--brand-from) 0%, var(--brand-to) 100%);
    color: #fff;
  }

  .sb-mobile-brand-inner {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    gap: 12px;
  }

  .sb-mobile-mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    flex: 0 0 auto;
    border: 1px solid rgba(255,255,255,.26);
    border-radius: 12px;
    background: rgba(255,255,255,.12);
    color: #fff;
    font-size: 17px;
    font-weight: 800;
  }

  .sb-mobile-title {
    margin: 0;
    color: #fff;
    font-size: 18px;
    line-height: 1.25;
    font-weight: 800;
  }

  .sb-mobile-desc {
    margin: 3px 0 0;
    color: rgba(255,255,255,.76);
    font-size: 11.5px;
  }

  .sb-main-center {
    flex: 0 0 auto;
    align-items: flex-start;
    padding: 16px;
  }

  .sb-card-wrap {
    width: 100%;
  }

  .sb-card {
    padding: 20px 16px;
  }

  .sb-heading {
    font-size: 22px;
  }

  .sb-subheading {
    font-size: 13px;
  }

  .sb-footer {
    margin-top: auto;
    padding: 0 16px 18px;
    line-height: 1.5;
  }
}
@media (max-width: 390px) {
  .sb-main-center { padding: 14px; }
  .sb-card { padding: 18px 14px; }
}

@media (prefers-reduced-motion: reduce) {
  .sb-input,
  .sb-btn {
    transition: none;
  }
}

/* Thiết bị cảm ứng: chữ ô nhập 16px để iOS không tự phóng to khi bấm vào ô. */
@media (pointer: coarse) {
  .sb-input { font-size: 16px; }
}

/* Icon Solar (sprite) */
.sb-ico { display: inline-block; flex-shrink: 0; vertical-align: middle; }
.sb-spin { animation: sbSpin .8s linear infinite; }
@keyframes sbSpin { to { transform: rotate(360deg); } }
.sb-input-icon.sb-ico { color: var(--faint); }
.sb-password-toggle { display: inline-flex; align-items: center; justify-content: center; }