/* ==========================================================================
   login.css — 로그인 화면 전용 (wireframes/login.html 정합)
   ──────────────────────────────────────────────────────────────────────────
   tokens.css 의 변수와 정확히 동일한 값으로 와이어프레임이 설계되어 있어
   별도 :root 재정의 없이 토큰을 그대로 쓴다.
   - 좌측 .login-identity : 그라디언트 정체성 패널 (브랜드/태그라인/CTA)
   - 우측 .login-form-zone: 흰색 폼 영역
   - ≤1024px에서 single column, ≤640px에서 모바일 폰트 축소
   ========================================================================== */

.login-shell {
  display: grid;
  grid-template-columns: 1fr 560px;
  min-height: 100vh;
  min-height: 100dvh;
  background: var(--surface);
}

/* ════════ LEFT · 정체성 ════════ */
.login-identity {
  position: relative;
  padding: 40px 56px;
  background:
    radial-gradient(circle at 80% 15%, rgba(79, 70, 229, 0.10), transparent 55%),
    radial-gradient(circle at 12% 90%, rgba(34, 183, 90, 0.05), transparent 50%),
    var(--bg);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border-right: 1px solid var(--line);
}
.login-identity .li-inner {
  flex: 1;
  display: flex;
  flex-direction: column;
  max-width: 560px;
  width: 100%;
  margin: 0 auto;
}
.login-identity .li-center {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-bottom: 12vh;
}

/* Brand mark — 큰 사이즈 + 펄싱 dot (radar blip) */
.login-identity .brand-mark-xl {
  font-size: 88px;
  line-height: 1;
  font-weight: 800;
  letter-spacing: -0.06em;
  margin: 0 0 24px;
  white-space: nowrap;
}
.login-identity .brand-mark-xl .b-social { color: var(--ink-3); }
.login-identity .brand-mark-xl .b-radar  { color: var(--ink); }
.login-identity .brand-mark-xl .b-dot {
  color: var(--brand);
  display: inline-block;
  animation: login-blip 2.6s ease-in-out infinite;
  transform-origin: center;
}
@keyframes login-blip {
  0%, 100% { opacity: 1;    transform: scale(1); }
  50%      { opacity: 0.55; transform: scale(0.88); }
}
@media (prefers-reduced-motion: reduce) {
  .login-identity .brand-mark-xl .b-dot { animation: none; }
}

.login-identity .li-tagline {
  font-size: 28px;
  line-height: 1.35;
  font-weight: 700;
  letter-spacing: -0.025em;
  color: var(--ink);
  margin: 0 0 8px;
}
.login-identity .li-sub {
  font-size: 15px;
  line-height: 1.65;
  color: var(--ink-2);
  letter-spacing: -0.005em;
}

/* "솔루션 자세히 보기 →" inline 링크 */
.login-identity .li-more {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 28px;
  font-size: 14px;
  font-weight: 600;
  color: var(--ink-2);
  padding: 6px 0;
  align-self: flex-start;
  position: relative;
  text-decoration: none;
  letter-spacing: -0.008em;
  transition: color 0.15s;
}
.login-identity .li-more::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 4px;
  width: 0;
  height: 1px;
  background: var(--ink);
  transition: width 0.25s ease;
}
.login-identity .li-more svg { transition: transform 0.2s ease; }
.login-identity .li-more:hover { color: var(--ink); }
.login-identity .li-more:hover::after { width: calc(100% - 22px); }
.login-identity .li-more:hover svg { transform: translateX(4px); }

.login-identity .li-bottom {
  font-size: 11px;
  color: var(--ink-3);
}

/* ════════ RIGHT · 로그인 폼 ════════ */
.login-form-zone {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px 40px calc(40px + 12vh);
  background: var(--surface);
}
.login-form-zone .form-wrap {
  width: 100%;
  max-width: 380px;
  margin: 0 auto;
}

.login-form-zone .brand-mark-sm {
  display: inline-flex;
  align-items: baseline;
  font-size: 22px;
  line-height: 1;
  font-weight: 800;
  letter-spacing: -0.04em;
  margin-bottom: 36px;
  text-decoration: none;
}
.login-form-zone .brand-mark-sm .b-social { color: var(--ink-3); }
.login-form-zone .brand-mark-sm .b-radar  { color: var(--ink); }
.login-form-zone .brand-mark-sm .b-dot    { color: var(--brand); }

.login-form-zone .form-title {
  font-size: 26px;
  font-weight: 800;
  letter-spacing: -0.025em;
  line-height: 1.25;
  margin: 0 0 8px;
  color: var(--ink);
}
.login-form-zone .form-subtitle {
  font-size: 14px;
  color: var(--ink-2);
  line-height: 1.65;
  margin: 0 0 28px;
}

.login-form-zone .field {
  margin-bottom: 16px;
}
.login-form-zone .field label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  color: var(--ink-2);
  margin-bottom: 7px;
}
.login-form-zone .field input {
  width: 100%;
  padding: 11px 14px;
  border: 1px solid var(--line);
  border-radius: 9px;
  font-size: 14px;
  color: var(--ink);
  background: var(--surface);
  font-family: inherit;
  transition: border-color 0.12s, box-shadow 0.12s;
}
.login-form-zone .field input::placeholder { color: var(--ink-3); }
.login-form-zone .field input:focus {
  outline: none;
  border-color: var(--ink);
  box-shadow: 0 0 0 3px rgba(11, 18, 32, 0.06);
}
.login-form-zone .field input[aria-invalid="true"] {
  border-color: #e04848;
}
.login-form-zone .field-error {
  margin-top: 6px;
  font-size: 12px;
  color: #b91c1c;
  letter-spacing: -0.005em;
}

.login-form-zone .form-meta {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  margin: 8px 0 24px;
  font-size: 12px;
}
.login-form-zone .form-meta .remember {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--ink-2);
  cursor: pointer;
  user-select: none;
}
.login-form-zone .form-meta .remember input {
  accent-color: var(--ink);
  cursor: pointer;
  margin: 0;
}

.login-form-zone .btn-login {
  width: 100%;
  padding: 13px 14px;
  background: var(--ink);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  border: 0;
  border-radius: 10px;
  cursor: pointer;
  transition: background 0.15s, transform 0.1s;
  letter-spacing: -0.005em;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}
.login-form-zone .btn-login:hover { background: #1e293b; }
.login-form-zone .btn-login:active { transform: translateY(1px); }
.login-form-zone .btn-login:disabled {
  opacity: 0.7;
  cursor: not-allowed;
  transform: none;
}

.login-form-zone .footer-help {
  margin-top: 32px;
  text-align: center;
  font-size: 12px;
  color: var(--ink-3);
}
.login-form-zone .footer-help a {
  color: var(--ink-2);
  font-weight: 600;
  transition: color 0.12s;
  text-decoration: none;
}
.login-form-zone .footer-help a:hover { color: var(--ink); }

/* ════════ 와이드 모니터 (≥1441px) ════════ */
@media (min-width: 1441px) {
  .login-identity .brand-mark-xl { font-size: 108px; margin-bottom: 28px; }
  .login-identity .li-tagline    { font-size: 36px; }
  .login-identity .li-sub        { font-size: 16px; }
  .login-identity .li-inner      { max-width: 640px; }
  .login-identity .li-more       { font-size: 15px; margin-top: 32px; }
}
/* ════════ 울트라 와이드 (≥1921px) ════════ */
@media (min-width: 1921px) {
  .login-identity .brand-mark-xl { font-size: 132px; margin-bottom: 36px; }
  .login-identity .li-tagline    { font-size: 44px; line-height: 1.3; }
  .login-identity .li-sub        { font-size: 18px; }
  .login-identity .li-inner      { max-width: 720px; }
  .login-identity .li-more       { font-size: 16px; margin-top: 36px; }
}

/* ════════ Tablet/Mobile (≤1024px) ════════ */
@media (max-width: 1024px) {
  .login-shell { grid-template-columns: 1fr; }
  .login-identity {
    padding: 64px 32px 56px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
    text-align: center;
  }
  .login-identity .li-inner  { align-items: center; }
  .login-identity .li-center { padding: 0; justify-content: center; align-items: center; }
  .login-identity .li-bottom { display: none; }
  .login-identity .brand-mark-xl { font-size: 84px; margin-bottom: 24px; }
  .login-identity .li-tagline    { font-size: 22px; }
  .login-identity .li-sub        { font-size: 14px; }
  .login-identity .li-more       { align-self: center; font-size: 13px; margin-top: 24px; }
  .login-form-zone {
    align-items: center;
    padding: 48px clamp(22px, 4vw, 40px) calc(64px + env(safe-area-inset-bottom, 0px));
  }
}
@media (max-width: 640px) {
  .login-identity { padding: 40px clamp(16px, 4vw, 24px) 36px; }
  .login-identity .brand-mark-xl { font-size: 60px; letter-spacing: -0.07em; margin-bottom: 20px; }
  .login-identity .li-tagline    { font-size: 18px; }
  .login-identity .li-sub        { font-size: 13px; }
  .login-identity .li-more       { font-size: 12px; margin-top: 20px; }
  .login-form-zone .form-title   { font-size: 22px; }
  .login-form-zone {
    padding: 36px clamp(18px, 5vw, 28px) calc(48px + env(safe-area-inset-bottom, 0px));
  }
  /* iOS: 포커스 줌 방지 + 터치 여유 */
  .login-form-zone .field input {
    font-size: 16px;
    padding: 12px 14px;
  }
  .login-form-zone .btn-login {
    font-size: 16px;
    padding: 14px 16px;
  }
}