/* 班笺 · 登录页：宣纸质感与克制的产品入口 */

.page-shell.login-page {
  isolation: isolate;
  width: 100%;
  min-height: 100vh;
  margin: 0;
  padding: clamp(24px, 5vw, 72px);
  display: grid;
  place-items: center;
  overflow: hidden;
  position: relative;
}

.page-shell.login-page::before,
.page-shell.login-page::after {
  content: "";
  position: fixed;
  z-index: -1;
  pointer-events: none;
  border-radius: 50%;
  filter: blur(2px);
}

.page-shell.login-page::before {
  width: min(58vw, 760px);
  aspect-ratio: 1;
  top: -34%;
  right: -12%;
  background: rgba(22, 85, 66, .045);
}

.page-shell.login-page::after {
  width: min(46vw, 620px);
  aspect-ratio: 1;
  bottom: -34%;
  left: -10%;
  background: rgba(201, 83, 33, .035);
}

.login-panel {
  width: min(980px, 100%);
  min-height: 590px;
  padding: clamp(34px, 5vw, 68px);
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(320px, .92fr);
  grid-template-rows: 1fr auto;
  column-gap: clamp(48px, 7vw, 96px);
  border: 1px solid rgba(28, 39, 34, .14);
  border-radius: 28px;
  position: relative;
  overflow: hidden;
  background: rgba(250, 248, 242, .86) url('../../img/paper-texture.png') repeat;
  background-size: 680px 680px;
  box-shadow:
    0 1px 0 rgba(255, 255, 255, .92) inset,
    0 26px 70px rgba(36, 46, 40, .12),
    0 5px 18px rgba(36, 46, 40, .06);
  animation: login-panel-in .48s var(--ease-out) both;
}

.login-panel::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: calc(55% - 1px);
  width: 1px;
  background: var(--line);
}

.login-panel::after {
  content: "班笺";
  position: absolute;
  right: -16px;
  bottom: -50px;
  color: rgba(22, 85, 66, .035);
  font: 700 180px/1 var(--serif);
  letter-spacing: -.12em;
  white-space: nowrap;
  pointer-events: none;
}

.login-header {
  align-self: center;
  position: relative;
  z-index: 1;
}

.login-brand {
  display: grid;
  grid-template-columns: 60px 1fr;
  column-gap: 18px;
  align-items: center;
}

.brand-seal-large {
  grid-row: 1 / 3;
  width: 58px;
  height: 58px;
  display: block;
  object-fit: contain;
}

.login-brand .eyebrow {
  align-self: end;
  margin: 0 0 3px;
  color: var(--jade);
  font-size: 11px;
  font-weight: 650;
  letter-spacing: .16em;
}

.login-brand h1 {
  align-self: start;
  margin: 0;
  font: 600 clamp(54px, 6vw, 78px)/.98 var(--serif);
  letter-spacing: .15em;
}

.login-header .lede {
  max-width: 370px;
  margin: 30px 0 0;
  color: var(--ink-light);
  font: 17px/1.9 var(--serif);
  letter-spacing: .035em;
  text-wrap: pretty;
}

.login-form {
  align-self: center;
  padding: 8px 0;
  position: relative;
  z-index: 1;
}

.login-form::before {
  content: "教师登录";
  display: block;
  margin-bottom: 24px;
  color: var(--ink);
  font: 600 20px/1.3 var(--serif);
  letter-spacing: .06em;
}

.login-form .field {
  gap: 8px;
}

.login-form .field > span {
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .035em;
}

.login-form input {
  min-height: 48px;
  padding: 11px 14px;
  border-color: rgba(28, 39, 34, .16);
  border-radius: 11px;
  background: rgba(255, 255, 255, .66);
  box-shadow: 0 1px 0 rgba(255, 255, 255, .76) inset;
}

.login-form input:hover {
  border-color: rgba(22, 85, 66, .3);
  background: rgba(255, 255, 255, .82);
}

.login-form input:focus {
  border-color: var(--jade);
  background: rgba(255, 255, 255, .94);
  box-shadow: 0 0 0 4px rgba(22, 85, 66, .1), 0 1px 0 #fff inset;
}

.login-submit-btn {
  width: 100%;
  min-height: 50px;
  margin-top: 7px;
  padding-inline: 18px;
  justify-content: space-between;
  border-radius: 11px;
  font-weight: 650;
  letter-spacing: .05em;
}

.login-submit-btn span:last-child {
  font: 300 25px/1 var(--serif);
  transition: transform var(--duration-fast) var(--ease-out);
}

.login-submit-btn:hover span:last-child {
  transform: translateX(3px);
}

.login-footer {
  grid-column: 1;
  align-self: end;
  padding-top: 34px;
  position: relative;
  z-index: 1;
}

.login-motto {
  margin: 0;
  color: var(--muted-light);
  font: 12px/1.7 var(--serif);
  letter-spacing: .12em;
}

.demo-box {
  display: inline-flex;
  margin-top: 12px;
  padding: 7px 10px;
  border: 1px solid var(--jade-border);
  border-radius: 8px;
  color: var(--jade-dark);
  background: rgba(226, 236, 230, .62);
  font-size: 11px;
}

@keyframes login-panel-in {
  from { opacity: 0; transform: translateY(14px) scale(.985); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

@media (max-width: 760px) {
  .page-shell.login-page { padding: 20px; }
  .login-panel {
    min-height: 0;
    padding: 38px 30px 30px;
    grid-template-columns: 1fr;
    grid-template-rows: auto auto auto;
    row-gap: 34px;
    border-radius: 22px;
  }
  .login-panel::before {
    inset: 43% 30px auto;
    width: auto;
    height: 1px;
    background: var(--line);
  }
  .login-panel::after { font-size: 120px; }
  .login-header { align-self: start; }
  .login-brand h1 { font-size: clamp(48px, 15vw, 66px); }
  .login-header .lede { margin-top: 22px; font-size: 15px; }
  .login-form { padding-top: 7px; }
  .login-footer { grid-column: 1; padding-top: 0; }
}

@media (max-width: 430px) {
  .page-shell.login-page { padding: 12px; }
  .login-panel { padding: 30px 22px 24px; row-gap: 28px; border-radius: 18px; }
  .login-brand { grid-template-columns: 48px 1fr; column-gap: 13px; }
  .brand-seal-large { width: 47px; height: 47px; }
  .login-brand .eyebrow { font-size: 10px; letter-spacing: .1em; }
  .login-panel::before { top: 41%; left: 22px; right: 22px; }
  .login-form::before { margin-bottom: 18px; }
  .login-motto { letter-spacing: .07em; }
}

@media (prefers-reduced-motion: reduce) {
  .login-panel { animation: none; }
  .login-submit-btn span:last-child { transition: none; }
}