/* ==================================================
   auth.css
   집찾GO — 로그인 / 회원가입 (탭 전환형 단일 화면)
   - 색상/여백 토큰은 common.css를 그대로 계승
   - 시그니처: 왼쪽 비주얼 패널의 "열쇠고리" 모티프
     회원가입 진행 상태에 따라 열쇠가 하나씩 걸리는 방식으로
     "집을 향해 한 걸음씩 다가간다"는 느낌을 표현
================================================== */

:root{
  --kakao:#FEE500;
  --kakao-text:#3C1E1E;
  --naver:#03C75A;
  --line:#E3E9F3;
  --line-strong:#CBD8EA;
  --danger:#EF4444;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

body{ background: linear-gradient(135deg, #F8FAFC, #EEF7FF); }

::selection{ background:rgba(30,136,255,0.18); color:var(--dark); }

a:focus-visible,
button:focus-visible,
input:focus-visible{
  outline:2.5px solid var(--primary);
  outline-offset:2px;
  border-radius:8px;
}

.auth-page{
  min-height:100vh;
  display:flex;
  align-items:center;
  justify-content:center;
  padding:130px 20px 60px;
}

.auth-shell{
  width:min(1040px, 100%);
  display:grid;
  grid-template-columns: 0.85fr 1.15fr;
  border-radius:32px;
  overflow:hidden;
  box-shadow:0 30px 80px rgba(15,23,42,0.16);
  background:var(--white);
}

/* ================= 왼쪽 비주얼 패널 ================= */
.auth-visual{
  position:relative;
  background:linear-gradient(160deg,#0F172A 0%, #14304F 55%, #17D4B3 150%);
  padding:52px 40px;
  color:#fff;
  display:flex;
  flex-direction:column;
  justify-content:space-between;
  overflow:hidden;
}
.auth-visual::before{
  content:"";
  position:absolute;
  inset:0;
  background:
    radial-gradient(circle at 20% 15%, rgba(30,136,255,0.35), transparent 45%),
    radial-gradient(circle at 85% 85%, rgba(23,212,179,0.3), transparent 50%);
  pointer-events:none;
}
.auth-visual .brand{
  position:relative;
  display:flex;
  align-items:center;
  gap:10px;
  font-size:22px;
  font-weight:900;
}
.auth-visual .brand img{ height:28px; }

.auth-visual .visual-copy{ position:relative; margin-top:40px; }
.auth-visual .visual-copy .eyebrow{
  display:inline-block;
  font-size:12px;
  font-weight:800;
  letter-spacing:1px;
  color:var(--accent);
  margin-bottom:14px;
  transition:opacity 0.2s ease;
}
.auth-visual h2{
  font-size:26px;
  line-height:1.45;
  font-weight:900;
  margin-bottom:14px;
  transition:opacity 0.25s ease;
}
.auth-visual p{
  font-size:14px;
  line-height:1.7;
  color:#CBD5E1;
  max-width:320px;
  transition:opacity 0.25s ease;
}

/* 시그니처: 진행 단계에 따라 걸리는 열쇠고리 */
.keyring{
  position:relative;
  margin-top:36px;
  display:flex;
  gap:14px;
}
.keyring .key{
  width:38px; height:38px;
  border-radius:50%;
  border:1.5px dashed rgba(255,255,255,0.35);
  display:flex;
  align-items:center;
  justify-content:center;
  color:rgba(255,255,255,0.35);
  font-size:15px;
  transition:0.35s var(--ease);
}
.keyring .key.filled{
  border-style:solid;
  border-color:transparent;
  background:var(--gradient-main);
  color:#fff;
  transform:scale(1.08);
  box-shadow:0 8px 18px rgba(23,212,179,0.35);
}
.keyring .key-label{
  position:relative;
  align-self:center;
  font-size:11px;
  color:rgba(255,255,255,0.5);
  margin-left:4px;
}

.auth-visual .quote{
  position:relative;
  font-size:12px;
  color:rgba(255,255,255,0.55);
  line-height:1.6;
  padding-top:24px;
  border-top:1px solid rgba(255,255,255,0.14);
}

/* ================= 오른쪽 폼 패널 ================= */
.auth-panel{
  padding:48px 46px;
  display:flex;
  flex-direction:column;
}

.redirect-notice{
  display:flex;
  align-items:center;
  gap:8px;
  padding:12px 16px;
  border-radius:12px;
  background:rgba(30,136,255,0.08);
  color:var(--primary);
  font-size:13px;
  font-weight:700;
  margin-bottom:20px;
}
.redirect-notice i{ font-size:16px; flex-shrink:0; }

.auth-tabs{
  display:flex;
  gap:6px;
  padding:6px;
  background:var(--light);
  border-radius:14px;
  margin-bottom:32px;
}
.auth-tab{
  flex:1;
  padding:12px 0;
  border:0;
  background:transparent;
  border-radius:10px;
  font-size:14px;
  font-weight:800;
  color:var(--gray);
  cursor:pointer;
  transition:0.25s var(--ease);
}
.auth-tab:hover:not(.active){ color:var(--primary); }
.auth-tab.active{
  background:#fff;
  color:var(--primary);
  box-shadow:0 8px 18px rgba(15,23,42,0.08);
}

.auth-form{ display:none; }
.auth-form.active{ display:block; animation:fadeUp 0.4s var(--ease); }
@keyframes fadeUp{
  from{ opacity:0; transform:translateY(12px); }
  to{ opacity:1; transform:translateY(0); }
}

.auth-form h1{
  font-size:22px;
  font-weight:900;
  color:var(--dark);
  margin-bottom:6px;
}
.auth-form .form-sub{
  font-size:13px;
  color:var(--gray);
  margin-bottom:26px;
}

.field{ margin-bottom:18px; }
.field label{
  display:block;
  font-size:13px;
  font-weight:800;
  color:var(--text);
  margin-bottom:7px;
}
.input-group{ position:relative; }
.input-group i.leading{
  position:absolute;
  left:14px; top:50%; transform:translateY(-50%);
  color:#A6B2C6;
  font-size:17px;
  pointer-events:none;
}
.field input{
  width:100%;
  padding:13px 14px 13px 40px;
  border-radius:12px;
  border:1.5px solid var(--line);
  font-size:14px;
  background:var(--light);
  transition:0.2s var(--ease);
}
.field input::placeholder{ color:#A6B2C6; }
.field input:hover{ border-color:var(--line-strong); }
.field input:focus{
  outline:none;
  border-color:var(--primary);
  background:#fff;
  box-shadow:0 0 0 4px rgba(30,136,255,0.12);
}
.field input.invalid{ border-color:var(--danger); background:#FEF2F2; }
.field .error-msg{
  display:none;
  font-size:12px;
  color:var(--danger);
  margin-top:6px;
  font-weight:700;
}
.field input.invalid ~ .error-msg{ display:block; }

.toggle-visibility{
  position:absolute;
  right:12px; top:50%; transform:translateY(-50%);
  border:0; background:transparent;
  color:#A6B2C6;
  font-size:17px;
  cursor:pointer;
  padding:4px;
}
.toggle-visibility:hover{ color:var(--primary); }

.field-row{ display:grid; grid-template-columns:1fr 1fr; gap:14px; }

/* 휴대폰번호 3칸 입력 */
.phone-split{ display:flex; align-items:center; gap:8px; }
.phone-split .input-group{ flex:1; min-width:0; }
.phone-split .input-group input{
  padding:13px 8px;
  text-align:center;
  letter-spacing:1px;
}
.phone-split .phone-sep{ color:var(--gray); font-weight:800; flex-shrink:0; }

.row-between{
  display:flex;
  justify-content:space-between;
  align-items:center;
  font-size:13px;
  margin-bottom:22px;
}
.remember{ display:flex; align-items:center; gap:7px; color:var(--gray); }
.remember input{ accent-color:var(--primary); }
.forgot-link{ color:var(--primary); font-weight:700; }
.forgot-link:hover{ text-decoration:underline; }

/* 회원 유형 선택 칩 */
.member-type{ display:flex; gap:10px; margin-bottom:22px; }
.type-card{
  flex:1;
  position:relative;
  padding:16px 14px;
  border-radius:14px;
  border:1.5px solid var(--line);
  cursor:pointer;
  transition:0.2s var(--ease);
}
.type-card input{ position:absolute; opacity:0; width:1px; height:1px; }
.type-card .t-icon{
  width:34px; height:34px;
  border-radius:10px;
  display:flex; align-items:center; justify-content:center;
  background:var(--light);
  color:var(--primary);
  font-size:16px;
  margin-bottom:10px;
  transition:0.2s ease;
}
.type-card .t-name{ font-size:13px; font-weight:800; color:var(--text); margin-bottom:2px; }
.type-card .t-desc{ font-size:11px; color:var(--gray); }
.type-card:hover{ border-color:var(--line-strong); }
.type-card.selected{
  border-color:transparent;
  background:linear-gradient(0deg, rgba(30,136,255,0.06), rgba(30,136,255,0.06)), #fff;
  box-shadow:0 0 0 2px var(--primary) inset;
}
.type-card.selected .t-icon{ background:var(--gradient-main); color:#fff; }

.broker-fields{
  display:none;
  padding:16px;
  margin-bottom:18px;
  background:var(--light);
  border-radius:14px;
  border:1px dashed var(--line-strong);
}
.broker-fields.show{ display:block; animation:fadeUp 0.3s var(--ease); }
.broker-fields .broker-note{
  display:flex;
  align-items:center;
  gap:6px;
  font-size:12px;
  color:var(--gray);
  margin-bottom:14px;
}
.broker-fields .broker-note i{ color:var(--accent); }

.agree-block{ margin-bottom:22px; }
.agree-row{
  display:flex;
  align-items:flex-start;
  gap:9px;
  font-size:13px;
  color:var(--text);
  padding:8px 2px;
}
.agree-row input{ margin-top:3px; accent-color:var(--primary); }
.agree-row.all{
  font-weight:800;
  padding-bottom:10px;
  margin-bottom:6px;
  border-bottom:1px solid var(--line);
}
.agree-row a{ color:var(--primary); text-decoration:underline; font-weight:700; }
.agree-row .optional-tag{
  font-size:11px;
  font-weight:700;
  color:var(--gray);
  background:#fff;
  border:1px solid var(--line);
  padding:1px 7px;
  border-radius:999px;
  margin-left:4px;
}

.btn-primary{
  width:100%;
  padding:15px;
  border-radius:12px;
  border:0;
  background:var(--gradient-main);
  color:#fff;
  font-weight:800;
  font-size:15px;
  cursor:pointer;
  box-shadow:0 14px 28px rgba(30,136,255,0.26);
  transition:0.25s var(--ease);
}
.btn-primary:hover{ transform:translateY(-2px); box-shadow:0 18px 32px rgba(30,136,255,0.32); }
.btn-primary:active{ transform:translateY(0) scale(0.99); }

.divider{
  display:flex;
  align-items:center;
  gap:12px;
  margin:22px 0;
  color:var(--gray);
  font-size:12px;
}
.divider::before, .divider::after{
  content:"";
  flex:1;
  height:1px;
  background:var(--line);
}

.social-row{ display:flex; gap:10px; margin-bottom:22px; }
.social-btn{
  flex:1;
  display:flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px;
  border-radius:12px;
  border:1.5px solid var(--line);
  background:#fff;
  font-size:13px;
  font-weight:800;
  cursor:pointer;
  transition:0.2s var(--ease);
}
.social-btn:hover{ transform:translateY(-2px); box-shadow:0 10px 20px rgba(15,23,42,0.08); }
.social-btn .dot{
  width:20px; height:20px;
  border-radius:50%;
  display:flex; align-items:center; justify-content:center;
  font-size:11px;
  font-weight:900;
  flex-shrink:0;
}
.social-btn.kakao .dot{ background:var(--kakao); color:var(--kakao-text); }
.social-btn.naver .dot{ background:var(--naver); color:#fff; }
.social-btn.google .dot{ background:#fff; color:#4285F4; border:1px solid var(--line); }

.guest-btn{
  width:100%;
  padding:13px;
  border-radius:12px;
  border:1.5px dashed var(--line-strong);
  background:transparent;
  color:var(--gray);
  font-size:13px;
  font-weight:800;
  cursor:pointer;
  display:flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  transition:0.2s var(--ease);
  margin-bottom:6px;
}
.guest-btn:hover{ border-color:var(--primary); color:var(--primary); background:rgba(30,136,255,0.04); }
.guest-note{
  text-align:center;
  font-size:11px;
  color:#A6B2C6;
  margin-bottom:22px;
}

.switch-line{
  text-align:center;
  font-size:13px;
  color:var(--gray);
}
.switch-line button{
  border:0; background:transparent;
  color:var(--primary);
  font-weight:800;
  cursor:pointer;
  padding:0;
}
.switch-line button:hover{ text-decoration:underline; }

/* ================= Toast ================= */
.toast{
  position:fixed;
  bottom:28px; left:50%;
  transform:translate(-50%, 20px);
  padding:14px 22px;
  border-radius:999px;
  background:var(--dark);
  color:#fff;
  font-size:13px;
  font-weight:700;
  box-shadow:0 18px 40px rgba(15,23,42,0.3);
  opacity:0;
  pointer-events:none;
  transition:0.3s var(--ease);
  z-index:2000;
}
.toast.show{ opacity:1; transform:translate(-50%, 0); }

/* ================= Mobile ================= */
@media (max-width:860px){
  .auth-shell{ grid-template-columns:1fr; }
  .auth-visual{ display:none; }
  .auth-panel{ padding:34px 24px; }
  .auth-page{ padding:104px 16px 40px; }
  .field-row{ grid-template-columns:1fr; }
  .member-type{ flex-direction:column; }
  .social-row{ flex-direction:column; }
}

@media (prefers-reduced-motion: reduce){
  .auth-form,
  .broker-fields,
  .toast,
  .btn-primary,
  .social-btn,
  .keyring .key{
    transition:none !important;
    animation:none !important;
  }
}