/* ============================================================================
   auth.css · 登录（user_login.php）与邀请注册（user_register.php）共用
   v4.4：两页原本各带一整块内联样式，抽取后合并为一份，差异用 body[data-page] 收敛。
   依赖：tokens.css（色板 / 字体 / 圆角 / 阴影），本文件不再定义 :root。
   ========================================================================== */

*,*::before,*::after{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:var(--fn-font-sans);
  color:var(--fn-text);background:var(--fn-surface);-webkit-font-smoothing:antialiased;
}
a{color:var(--fn-brand);text-decoration:none}
a:hover{text-decoration:underline}
:focus-visible{outline:2px solid var(--fn-brand);outline-offset:2px;border-radius:var(--fn-radius-sm)}
::selection{background:rgba(47,93,78,.16)}

/* ---------- 版式：整屏定高，左右各占一列，右栏内容真正居中 ---------- */
.auth{
  display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);
  height:100vh;min-height:620px;
}
/* 注册表单更长，取消定高，改用最小高度兜底 */
body[data-page="user_register"] .auth{height:auto;min-height:100vh;min-height:100dvh}

/* ---------- 左栏：价值主张 ---------- */
.auth-side{
  position:relative;overflow:hidden;display:flex;flex-direction:column;
  padding:44px 60px 36px;
  background:radial-gradient(760px 540px at 16% 10%,var(--fn-brand-mid) 0%,var(--fn-brand-dark) 58%,var(--fn-brand-dark) 100%);
  color:var(--fn-brand-tint);
}
.auth-side::after{
  content:"";position:absolute;right:-90px;bottom:-150px;width:440px;height:440px;border-radius:50%;
  background:radial-gradient(circle at 32% 32%,rgba(184,131,58,.30),rgba(184,131,58,0) 64%);
  pointer-events:none;
}
.auth-brand{display:flex;align-items:center;gap:10px;position:relative;z-index:1}
.auth-brand .dot{
  width:38px;height:38px;border-radius:11px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--fn-brand-mid),var(--fn-brand));color:var(--fn-accent-soft);
  font-family:var(--fn-font-serif);font-size:17px;font-weight:700;
  box-shadow:0 10px 22px -12px rgba(0,0,0,.6)
}
.auth-brand .name{
  font-family:var(--fn-font-serif);
  font-size:17px;font-weight:700;letter-spacing:2px;color:var(--fn-accent-soft)
}
.auth-brand .tag{font-size:11px;color:rgba(244,227,195,.74);letter-spacing:2px;margin-left:2px}
.auth-copy{position:relative;z-index:1;margin:auto 0;max-width:520px;padding:28px 0}
.auth-kicker{font-size:12px;letter-spacing:3px;color:rgba(244,227,195,.84);margin-bottom:16px}
.auth-h1{
  font-family:var(--fn-font-serif);
  font-size:clamp(34px,3.6vw,48px);line-height:1.24;letter-spacing:2px;font-weight:700;
  margin:0 0 16px;color:var(--fn-accent-soft)
}
.auth-h1 em{font-style:normal;color:var(--fn-accent-soft)}
.auth-sub{font-size:15px;line-height:1.9;color:rgba(234,243,239,.88);margin:0 0 26px;letter-spacing:.4px}
.auth-points{list-style:none;padding:0;margin:0;display:grid;gap:13px}
.auth-points li{display:grid;grid-template-columns:22px minmax(0,1fr);gap:12px;align-items:start}
.auth-points .idx{
  width:22px;height:22px;border-radius:50%;border:1px solid rgba(244,227,195,.34);
  color:var(--fn-accent-soft);font-size:11px;display:grid;place-items:center;margin-top:2px
}
.auth-points b{display:block;font-size:13.5px;font-weight:600;color:var(--fn-accent-soft);margin-bottom:3px}
.auth-points span.d{display:block;font-size:13px;line-height:1.7;color:rgba(234,243,239,.80)}
.auth-meta{position:relative;z-index:1;font-size:12px;color:rgba(234,243,239,.66);letter-spacing:.4px}
.auth-meta a{color:rgba(244,227,195,.80);text-decoration:none;display:inline-flex;align-items:center;min-height:24px}
.auth-meta a:hover{text-decoration:underline}

/* ---------- 右栏：表单卡。place-items:center = 水平与垂直同时居中 ---------- */
.auth-panel{
  display:grid;place-items:center;
  padding:32px 40px;background:var(--fn-surface);
  box-shadow:inset 1px 0 0 var(--fn-line-soft);
}
.auth-form{width:100%;max-width:368px}

.auth-head{text-align:center;margin-bottom:26px}
.auth-logo{
  width:44px;height:44px;border-radius:12px;display:grid;place-items:center;margin:0 auto 14px;
  background:linear-gradient(135deg,var(--fn-brand),var(--fn-brand-mid));color:var(--fn-accent-soft);
  font-family:var(--fn-font-serif);font-size:18px;font-weight:700;
  box-shadow:0 10px 22px -10px rgba(47,93,78,.75)
}
.auth-title{
  font-family:var(--fn-font-serif);
  font-size:25px;font-weight:700;color:var(--fn-brand-dark);margin:0 0 6px;letter-spacing:1px
}
.auth-tip{font-size:13px;color:var(--fn-text-3);margin:0;line-height:1.7}
.auth-tip b{color:var(--fn-brand-dark);font-weight:600}

/* 邀请有效期徽标：长日期在窄屏自动换行，不撑破表单 */
.invite-badge{
  display:inline-flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:6px;
  max-width:100%;margin:0 auto 18px;padding:4px 12px;
  background:var(--fn-accent-soft);border:1px solid var(--fn-accent-soft);color:var(--fn-accent-dark);
  font-size:12px;line-height:1.5;border-radius:var(--fn-radius-pill)
}

.auth-alert{
  display:flex;align-items:flex-start;gap:8px;
  background:var(--fn-up-soft);border:1px solid var(--fn-up-line);color:var(--fn-up);
  font-size:13px;line-height:1.6;border-radius:var(--fn-radius-sm);padding:9px 12px;margin:0 0 16px
}
.auth-alert[hidden]{display:none}
.auth-alert svg{flex:none;margin-top:2px}

.fld-label{display:block;font-size:13px;font-weight:600;color:var(--fn-text-2);margin:0 0 6px}
.fld-label .opt{font-weight:400;color:var(--fn-text-3)}
.fld{
  display:flex;align-items:center;gap:8px;height:44px;padding:0 12px;
  border:1px solid var(--fn-line);border-radius:var(--fn-radius-sm);background:var(--fn-surface);
  transition:border-color .18s var(--fn-ease),box-shadow .18s var(--fn-ease)
}
.fld + .fld-label{margin-top:16px}
.fld:focus-within{border-color:var(--fn-brand);box-shadow:0 0 0 3px rgba(47,93,78,.10)}
.fld svg{flex:none;color:var(--fn-text-3)}
.fld input{
  flex:1;min-width:0;height:100%;border:0;outline:none;background:transparent;
  font-size:14px;color:var(--fn-text);font-family:inherit
}
.fld input::placeholder{color:var(--fn-text-3)}
.fld .eye{
  flex:none;width:28px;height:28px;display:grid;place-items:center;
  border:0;background:transparent;padding:0;margin-right:-6px;
  color:var(--fn-text-3);cursor:pointer;border-radius:var(--fn-radius-sm)
}
.fld .eye:hover{color:var(--fn-brand);background:var(--fn-brand-tint)}

.auth-submit{
  width:100%;height:44px;margin-top:22px;border:0;border-radius:var(--fn-radius-sm);cursor:pointer;
  background:var(--fn-brand);color:var(--fn-surface);font-size:15px;font-weight:600;letter-spacing:3px;
  font-family:inherit;transition:background .18s var(--fn-ease),transform .06s var(--fn-ease)
}
.auth-submit:hover{background:var(--fn-brand-dark)}
.auth-submit:active{transform:translateY(1px)}
.auth-submit[disabled]{background:var(--fn-brand-mid);cursor:progress}

.auth-alt{
  margin-top:22px;padding-top:16px;border-top:1px solid var(--fn-line-soft);
  font-size:12px;color:var(--fn-text-3);text-align:center;line-height:1.9
}
.auth-alt .back{color:var(--fn-brand);font-weight:600;display:inline-flex;align-items:center;min-height:32px}
.auth-alt a{display:inline-flex;align-items:center;min-height:24px}
.auth-alt .back:hover{text-decoration:underline}

/* ---------- 邀请失效 / 已使用 状态 ---------- */
.dead-icon{
  width:52px;height:52px;border-radius:50%;display:grid;place-items:center;margin:0 auto 14px;
  background:var(--fn-accent-soft);color:var(--fn-accent);border:1px solid var(--fn-accent-soft)
}
.dead-reason{
  background:var(--fn-brand-tint);border:1px solid var(--fn-line);border-radius:var(--fn-radius);
  padding:14px 16px;margin:18px 0 0;font-size:13px;line-height:1.85;color:var(--fn-text-2)
}
.dead-reason b{color:var(--fn-text)}
.dead-actions{display:grid;gap:10px;margin-top:20px}
.btn-line{
  display:block;text-align:center;padding:11px;border-radius:var(--fn-radius-sm);font-size:14px;font-weight:600;
  background:var(--fn-brand);color:var(--fn-surface);text-decoration:none
}
.btn-line:hover{background:var(--fn-brand-dark);text-decoration:none}
.btn-line.ghost{background:var(--fn-surface);color:var(--fn-brand);border:1px solid var(--fn-brand-line)}
.btn-line.ghost:hover{background:var(--fn-brand-tint)}
.dead-tip{
  margin-top:14px;padding:10px 12px;border:1px dashed var(--fn-accent-soft);border-radius:var(--fn-radius-sm);
  background:var(--fn-accent-tint);font-size:12px;line-height:1.8;color:var(--fn-text-3)
}
.dead-tip b{color:var(--fn-accent-dark)}

/* ---------- 注册页微调：表单更密，标题略紧凑 ---------- */
body[data-page="user_register"] .auth-head{margin-bottom:22px}

/* ---------- 短屏：收紧左侧，保证表单始终在首屏 ---------- */
@media (max-height:720px) and (min-width:901px){
  .auth-points{display:none}
  .auth-copy{padding:14px 0}
  .auth-h1{font-size:34px}
  .auth-sub{margin-bottom:0}
  .auth-head{margin-bottom:20px}
}

@media (max-width:1180px){
  .auth-side{padding:40px 40px 32px}
  .auth-h1{font-size:34px}
  .auth-sub{font-size:14px}
  .auth-panel{padding:28px 32px}
}

/* ---------- 平板 / 手机：上下堆叠，表单紧跟上屏 ---------- */
@media (max-width:900px){
  .auth{height:auto;min-height:100vh;grid-template-columns:1fr}
  .auth-side{padding:22px 22px 20px}
  .auth-copy{margin:0;padding:18px 0 2px}
  .auth-kicker{margin-bottom:10px}
  .auth-h1{font-size:27px;margin-bottom:10px;letter-spacing:1px}
  .auth-sub{font-size:13.5px;line-height:1.8;margin-bottom:0}
  .auth-sub br{display:none}
  .auth-points{display:none}
  .auth-meta{margin-top:14px}
  .auth-panel{padding:26px 22px 40px;box-shadow:none;border-top:1px solid var(--fn-brand-tint)}
  .auth-form{max-width:420px;margin:0 auto}
  .auth-head{margin-bottom:20px}
  .auth-title{font-size:22px}
  .auth-logo{width:40px;height:40px;font-size:17px;margin-bottom:12px}
}

@media (max-width:560px){
  .auth-brand .tag{display:none}
  .auth-h1{font-size:24px}
  .auth-panel{padding:22px 20px 36px}
  .auth-submit{letter-spacing:2px}
  .auth-alt{font-size:12px}
  body[data-page="user_register"] .auth-side{padding:16px 20px 14px}
  body[data-page="user_register"] .auth-copy{padding:10px 0 0}
  body[data-page="user_register"] .auth-kicker{margin-bottom:6px;font-size:11px}
  body[data-page="user_register"] .auth-h1{font-size:22px;margin-bottom:0}
  body[data-page="user_register"] .auth-sub{display:none}
  body[data-page="user_register"] .auth-meta{margin-top:10px}
}