/* ============================================================================
   登录 / 注册页样式（index.html）
   依赖 base.css 提供的：设计变量、重置、落雪 .particles、玻璃 .glass
   ========================================================================== */

[hidden]{display:none !important}

/* 整页深色底（base.css 里的 .sky 是主页的明暗旅程层，这里不用） */
body.auth{
  min-height:100vh;
  /* 顶栏 / 主体 / 页脚 三段式：主体占满剩余高度，页脚自然贴底 */
  display:flex;flex-direction:column;
  background:
    radial-gradient(900px 620px at 78% 10%, rgba(120,104,216,.22), transparent 62%),
    radial-gradient(700px 620px at 6% 94%, rgba(64,116,196,.16), transparent 64%),
    linear-gradient(180deg, #0b1024 0%, #070b16 56%, #04060d 100%);
}
/* 登录页雪花常显（主页是按滚动进度渐显的） */
body.auth .particles{opacity:.9}

/* ---------- 顶栏：品牌 + 语言切换 ---------- */
.auth-top{
  position:relative;z-index:5;display:flex;align-items:center;gap:16px;
  padding:20px clamp(16px,4vw,46px);
}
.auth-top .brand{color:var(--ice)}
.auth-top .langsw{
  margin-left:auto;display:flex;gap:4px;padding:4px;
  border:1px solid var(--line);border-radius:999px;background:rgba(255,255,255,.05);
}
.auth-top .langsw button{
  font-family:var(--sans);font-size:.72rem;letter-spacing:.06em;color:var(--ice-2);
  background:transparent;border:0;cursor:pointer;padding:6px 10px;border-radius:999px;
  transition:.28s var(--ease);white-space:nowrap;
}
.auth-top .langsw button:hover{color:#fff;background:rgba(255,255,255,.08)}
.auth-top .langsw button[aria-pressed="true"]{
  color:#0b0f1e;background:linear-gradient(140deg,#eef2fc,#b9a7ff);
  box-shadow:0 6px 18px rgba(150,128,245,.36);
}

/* ---------- 主体：左介绍 + 右表单 ---------- */
.auth-wrap{
  position:relative;z-index:2;width:100%;max-width:1160px;margin:0 auto;
  flex:1 1 auto;align-content:center;
  padding:clamp(16px,3vh,44px) clamp(18px,4vw,46px) clamp(40px,7vh,80px);
  display:grid;grid-template-columns:1.02fr .98fr;gap:clamp(24px,5vw,72px);align-items:center;
}
.auth-intro .kicker{
  display:inline-flex;align-items:center;gap:10px;font-family:var(--sans);font-size:.68rem;
  letter-spacing:.3em;color:var(--ice-2);text-transform:uppercase;
  border:1px solid rgba(233,182,114,.32);padding:7px 16px;border-radius:999px;
  background:rgba(10,14,28,.44);backdrop-filter:blur(8px);
}
.auth-intro .kicker i{width:5px;height:5px;border-radius:50%;background:var(--candle);
  box-shadow:0 0 12px var(--candle)}
/* 角色名铭牌：登录页第一眼就要看清这是谁的主页 */
.auth-name{display:flex;flex-direction:column;gap:7px;margin:24px 0 0}
.auth-name b{
  font-family:var(--serif);font-weight:400;line-height:1.15;letter-spacing:.2em;
  font-size:clamp(2rem,4.8vw,2.9rem);color:#fff;
  text-shadow:0 2px 30px rgba(0,0,0,.55), 0 0 52px rgba(233,182,114,.22);
}
.auth-name em{
  font-family:var(--sans);font-style:normal;font-size:.64rem;letter-spacing:.3em;
  text-transform:uppercase;color:var(--candle);opacity:.85;
}
.auth-name::after{
  content:"";width:58px;height:2px;margin-top:16px;border-radius:2px;
  background:linear-gradient(90deg,var(--candle),transparent);
}
.auth-intro h1{
  font-size:clamp(1.35rem,2.6vw,1.8rem);font-weight:400;line-height:1.25;letter-spacing:.1em;
  margin:26px 0 12px;color:#fff;
  text-shadow:0 2px 34px rgba(0,0,0,.55), 0 0 70px rgba(233,182,114,.18);
}
.auth-intro .lead{color:var(--ice-2);max-width:34ch;margin:0}
.auth-points{list-style:none;margin:30px 0 0;padding:0;display:flex;flex-direction:column;gap:12px}
.auth-points li{
  position:relative;padding-left:20px;font-size:.86rem;line-height:1.7;color:var(--ice-2);
  letter-spacing:.04em;
}
.auth-points li::before{
  content:"";position:absolute;left:0;top:.66em;width:7px;height:7px;
  transform:rotate(45deg);background:var(--candle);opacity:.8;
}

/* ---------- 表单卡片 ---------- */
/* 表单卡片：自带玻璃质感（不依赖主页的 .glass，两者样式解耦） */
.auth-card{
  position:relative;overflow:hidden;
  padding:clamp(22px,2.6vw,34px);border-radius:22px;
  background:linear-gradient(158deg, rgba(255,255,255,.075), rgba(255,255,255,.018));
  border:1px solid var(--line);
  box-shadow:0 24px 60px rgba(0,0,0,.5), inset 0 1px 0 rgba(255,255,255,.08);
  backdrop-filter:blur(16px) saturate(130%);-webkit-backdrop-filter:blur(16px) saturate(130%);
}
.auth-card::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(140deg, rgba(255,255,255,.14), transparent 34%, transparent 66%, rgba(160,138,255,.10));
}
.auth-tabs{
  position:relative;display:grid;grid-template-columns:1fr 1fr;margin-bottom:24px;
  border-bottom:1px solid var(--line);
}
.auth-tabs button{
  position:relative;z-index:2;font-family:var(--serif);font-size:1.02rem;letter-spacing:.14em;
  color:var(--mute);background:none;border:0;cursor:pointer;padding:12px 0 14px;transition:.3s var(--ease);
}
.auth-tabs button[aria-selected="true"]{color:#fff}
.auth-tabs button:hover{color:var(--ice)}
.tab-ink{
  position:absolute;left:0;bottom:-1px;width:50%;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--violet),var(--blue));
  box-shadow:0 0 14px rgba(160,138,255,.6);
  transition:transform .38s var(--ease);
}
.auth-tabs[data-active="register"] .tab-ink{transform:translateX(100%)}

.field{margin-bottom:16px}
.field > label{
  display:block;font-family:var(--sans);font-size:.66rem;letter-spacing:.26em;
  text-transform:uppercase;color:var(--violet);margin-bottom:8px;
}
.field input[type="email"],
.field input[type="password"],
.field input[type="text"]{
  width:100%;font-family:var(--serif);font-size:.96rem;color:#fff;letter-spacing:.04em;
  padding:12px 14px;border-radius:12px;border:1px solid var(--line);
  background:rgba(255,255,255,.045);transition:.3s var(--ease);
}
.field input::placeholder{color:rgba(184,199,227,.42);letter-spacing:.04em}
.field input:focus{
  outline:none;border-color:rgba(160,138,255,.65);
  background:rgba(160,138,255,.09);box-shadow:0 0 0 3px rgba(160,138,255,.16);
}
.field.bad input{border-color:rgba(255,120,140,.7);box-shadow:0 0 0 3px rgba(255,120,140,.14)}
.field .hint{margin:7px 2px 0;font-family:var(--sans);font-size:.66rem;letter-spacing:.04em;
  color:var(--mute);line-height:1.6}
.field .err{margin:6px 2px 0;font-family:var(--sans);font-size:.7rem;letter-spacing:.04em;
  color:#ff9aab;min-height:1em}
.field.bad .err::before{content:"⚠ ";}

.pwd-wrap{position:relative}
.pwd-wrap input{padding-right:88px}
.pwd-toggle{
  position:absolute;right:8px;top:50%;transform:translateY(-50%);
  font-family:var(--sans);font-size:.66rem;letter-spacing:.12em;color:var(--ice-2);
  background:rgba(255,255,255,.07);border:1px solid var(--line);border-radius:8px;
  padding:6px 10px;cursor:pointer;transition:.25s var(--ease);white-space:nowrap;
}
.pwd-toggle:hover{color:#fff;background:rgba(160,138,255,.22)}

/* 密码强度：三段 */
.strength{display:flex;align-items:center;gap:10px;margin-top:9px}
.strength .bars{display:flex;gap:5px;flex:1}
.strength .bars i{
  height:4px;flex:1;border-radius:99px;background:rgba(255,255,255,.12);transition:.35s var(--ease);
}
.strength .txt{font-family:var(--sans);font-size:.64rem;letter-spacing:.14em;color:var(--mute);white-space:nowrap}
.strength[data-level="1"] .bars i:nth-child(1){background:#ff8b9a}
.strength[data-level="2"] .bars i:nth-child(-n+2){background:var(--candle)}
.strength[data-level="3"] .bars i{background:#7ee0b8}

/* 记住我 / 忘记密码 */
.row-between{display:flex;align-items:center;justify-content:space-between;gap:14px;margin:4px 0 18px}
.check{display:inline-flex;align-items:center;gap:9px;cursor:pointer;
  font-family:var(--sans);font-size:.74rem;letter-spacing:.06em;color:var(--ice-2)}
.check input{appearance:none;width:16px;height:16px;border-radius:5px;flex:0 0 16px;
  border:1px solid var(--line-strong);background:rgba(255,255,255,.05);cursor:pointer;
  position:relative;transition:.25s var(--ease)}
.check input:checked{background:linear-gradient(140deg,#eef2fc,#b9a7ff);border-color:transparent}
.check input:checked::after{
  content:"";position:absolute;left:5px;top:2px;width:4px;height:8px;
  border:solid #131a2c;border-width:0 2px 2px 0;transform:rotate(45deg);
}
.check input:focus-visible{outline:2px solid var(--violet);outline-offset:2px}
.check a,.link{color:var(--ice);text-decoration:none;border-bottom:1px solid rgba(184,199,227,.4)}
.check a:hover,.link:hover{color:#fff;border-bottom-color:#fff}
.check.agree{margin:2px 0 18px;line-height:1.6;align-items:flex-start}
.check.agree input{margin-top:2px}

.btn-primary{
  width:100%;font-family:var(--serif);font-size:1rem;letter-spacing:.24em;
  color:#0b0f1e;padding:14px 18px;border:0;border-radius:12px;cursor:pointer;
  background:linear-gradient(140deg,#eef2fc,#b9a7ff);
  box-shadow:0 12px 30px rgba(150,128,245,.32);transition:.3s var(--ease);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 18px 38px rgba(150,128,245,.42)}
.btn-primary:active{transform:translateY(0)}
.btn-primary[disabled]{opacity:.6;cursor:progress;transform:none}

.demo-note{
  margin:14px 0 0;font-family:var(--sans);font-size:.66rem;line-height:1.7;
  letter-spacing:.03em;color:var(--mute);text-align:center;
}

/* 第三方登录 */
.divider{display:flex;align-items:center;gap:14px;margin:24px 0 16px;
  font-family:var(--sans);font-size:.66rem;letter-spacing:.2em;color:var(--mute);text-transform:uppercase}
.divider::before,.divider::after{content:"";flex:1;height:1px;
  background:linear-gradient(90deg,transparent,var(--line),transparent)}
.third{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.third-btn{
  display:flex;align-items:center;gap:10px;cursor:pointer;
  padding:10px 12px;border-radius:12px;border:1px solid var(--line);
  background:rgba(255,255,255,.04);color:var(--ice-2);
  font-family:var(--sans);font-size:.74rem;letter-spacing:.06em;
  transition:.28s var(--ease);
}
.third-btn:hover{color:#fff;border-color:var(--line-strong);background:rgba(255,255,255,.09);
  transform:translateY(-2px)}
.third-btn .lg{
  width:24px;height:24px;flex:0 0 24px;border-radius:50%;
  display:grid;place-items:center;font-family:var(--sans);font-size:.6rem;
  font-style:normal;letter-spacing:0;color:#fff;
}
.lg-google{background:#ffffff;color:#4285F4 !important;border:1px solid #dadce0}
.lg-github{background:#2d333b}
.lg-qq{background:#12b7f5}
.lg-netease{background:#c20c0c}

.switch-line{margin:18px 0 0;text-align:center;font-family:var(--sans);
  font-size:.72rem;letter-spacing:.06em}
.switch-line a{color:var(--ice-2);text-decoration:none;border-bottom:1px solid rgba(184,199,227,.35)}
.switch-line a:hover{color:#fff;border-bottom-color:#fff}

/* ---------- 轻提示 ---------- */
.toast{
  position:fixed;left:50%;bottom:36px;transform:translate(-50%,20px);z-index:60;
  max-width:min(88vw,520px);padding:12px 20px;border-radius:12px;
  background:rgba(12,17,32,.94);border:1px solid var(--line-strong);
  box-shadow:0 18px 44px rgba(0,0,0,.5);
  font-family:var(--sans);font-size:.78rem;letter-spacing:.06em;color:var(--ice);
  opacity:0;pointer-events:none;transition:.42s var(--ease);text-align:center;
}
.toast.show{opacity:1;transform:translate(-50%,0)}
.toast.ok{border-color:rgba(126,224,184,.5)}
.toast.bad{border-color:rgba(255,138,160,.5)}

/* ---------- 响应式 ---------- */
@media (max-width:900px){
  .auth-wrap{grid-template-columns:1fr;gap:28px;padding-top:8px}
  .auth-intro{text-align:center}
  .auth-intro .lead{margin:0 auto}
  .auth-points{max-width:420px;margin-left:auto;margin-right:auto;text-align:left}
  .auth-intro h1{font-size:clamp(1.15rem,4.6vw,1.5rem)}
}
@media (max-width:420px){
  .third{grid-template-columns:1fr}
  .auth-top{padding:14px 16px}
}