/* PCTCS · 登录 — 结算终端视觉 */
:root {
  color-scheme: dark;
  --void: #070910;
  --surface: #0F131B;
  --surface-2: #161B26;
  --field: #0A0E15;
  --hairline: rgba(146, 176, 222, 0.11);
  --hairline-strong: rgba(146, 176, 222, 0.20);
  --ink: #E8ECF4;
  --ink-2: #9AA5BA;
  --ink-3: #5D6779;
  --accent: #4192E3;
  --accent-ink: #061018;
  --accent-dim: rgba(65, 146, 227, 0.13);
  --accent-glow: rgba(65, 146, 227, 0.30);
  --s2: #C87E2C;
  --s3: #20A97A;
  --neg: #E0605C;
  --pos: #20A97A;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  --sans: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    color-scheme: light;
    --void: #E9ECF1; --surface: #FAFBFC; --surface-2: #F1F3F7; --field: #FFFFFF;
    --hairline: rgba(20,38,68,0.11); --hairline-strong: rgba(20,38,68,0.20);
    --ink: #0C111B; --ink-2: #4A5568; --ink-3: #8B95A7;
    --accent: #1E6FC4; --accent-ink: #FFFFFF;
    --accent-dim: rgba(30,111,196,0.09); --accent-glow: rgba(30,111,196,0.20);
    --s2: #B0541A; --s3: #0A7F63; --neg: #C23B36; --pos: #0A7F63;
  }
}
:root[data-theme="light"] {
  color-scheme: light;
  --void: #E9ECF1; --surface: #FAFBFC; --surface-2: #F1F3F7; --field: #FFFFFF;
  --hairline: rgba(20,38,68,0.11); --hairline-strong: rgba(20,38,68,0.20);
  --ink: #0C111B; --ink-2: #4A5568; --ink-3: #8B95A7;
  --accent: #1E6FC4; --accent-ink: #FFFFFF;
  --accent-dim: rgba(30,111,196,0.09); --accent-glow: rgba(30,111,196,0.20);
  --s2: #B0541A; --s3: #0A7F63; --neg: #C23B36; --pos: #0A7F63;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; min-height: 100%; }
body {
  font-family: var(--sans);
  background: var(--void);
  color: var(--ink);
  font-size: 14px; line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  display: flex; align-items: center; justify-content: center;
  padding: 24px; min-height: 100vh;
  position: relative; overflow-x: hidden;
}
/* 极淡的坐标网格 —— 仪表底纹，不喧宾夺主 */
body::before {
  content: ""; position: fixed; inset: 0; pointer-events: none;
  background-image:
    linear-gradient(var(--hairline) 1px, transparent 1px),
    linear-gradient(90deg, var(--hairline) 1px, transparent 1px);
  background-size: 56px 56px;
  opacity: 0.34;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 42%, #000 0%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 42%, #000 0%, transparent 78%);
}
.shell { width: 100%; max-width: 384px; position: relative; z-index: 1; }

.card {
  background: linear-gradient(168deg, var(--surface-2) 0%, var(--surface) 58%);
  border: 1px solid var(--hairline-strong);
  border-radius: 18px; padding: 32px 30px 28px;
  box-shadow: 0 1px 0 rgba(255,255,255,0.04) inset, 0 26px 70px rgba(0,0,0,0.5);
  position: relative; overflow: hidden;
  animation: rise 0.5s cubic-bezier(0.2, 0.9, 0.3, 1);
}
.card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, var(--accent) 0%, transparent 58%);
}

/* 品牌标记：四根柱子，呼应仪表板的数据条 */
.mark { display: flex; align-items: flex-end; gap: 4px; height: 26px; margin-bottom: 18px; }
.mark .bar { width: 6px; border-radius: 2px 2px 0 0; animation: grow 0.65s cubic-bezier(0.2,0.9,0.3,1) backwards; }
.mark .b1 { height: 38%; background: var(--accent); box-shadow: 0 0 10px var(--accent-glow); animation-delay: 0.05s; }
.mark .b2 { height: 70%; background: var(--s2); animation-delay: 0.12s; }
.mark .b3 { height: 52%; background: var(--s3); animation-delay: 0.19s; }
.mark .b4 { height: 100%; background: var(--accent); opacity: 0.55; animation-delay: 0.26s; }
@keyframes grow { from { height: 0; opacity: 0; } }
@keyframes rise { from { opacity: 0; transform: translateY(12px); } }

h1 {
  font-family: var(--mono); font-size: 19px; margin: 0;
  letter-spacing: 0.18em; font-weight: 600;
}
.tag {
  font-family: var(--mono); margin: 7px 0 24px; color: var(--ink-3);
  font-size: 9.5px; letter-spacing: 0.16em; text-transform: uppercase;
}

.tabs {
  display: flex; gap: 3px; background: var(--field);
  border: 1px solid var(--hairline); border-radius: 10px; padding: 3px; margin-bottom: 20px;
}
.tab {
  flex: 1; border: 0; background: none; font: inherit; color: var(--ink-3);
  padding: 8px 10px; border-radius: 7px; cursor: pointer; font-size: 13px;
  transition: color 0.15s, background 0.15s;
}
.tab:hover { color: var(--ink-2); }
.tab.active { background: var(--surface-2); color: var(--ink); font-weight: 600; }
.tab:focus-visible, .submit:focus-visible, input:focus-visible {
  outline: 2px solid var(--accent); outline-offset: 2px;
}

.fld { display: flex; flex-direction: column; gap: 6px; margin-bottom: 15px; }
.fld label {
  font-family: var(--mono); font-size: 9.5px; letter-spacing: 0.13em;
  text-transform: uppercase; color: var(--ink-3);
}
input {
  font: inherit; font-family: var(--mono); font-size: 13px;
  color: var(--ink); background: var(--field);
  border: 1px solid var(--hairline); border-radius: 10px;
  padding: 11px 13px; width: 100%; transition: border-color 0.15s, box-shadow 0.15s;
}
input::placeholder { color: var(--ink-3); font-family: var(--sans); }
input:focus { border-color: var(--accent); outline: none; box-shadow: 0 0 0 3px var(--accent-dim); }
.hint { font-size: 10.5px; color: var(--ink-3); }

.submit {
  width: 100%; font: inherit; font-weight: 600; font-size: 13.5px;
  background: var(--accent); color: var(--accent-ink);
  border: 0; border-radius: 10px; padding: 12px; cursor: pointer; margin-top: 6px;
  box-shadow: 0 0 0 1px var(--accent-glow), 0 6px 20px -6px var(--accent-glow);
  transition: filter 0.15s;
}
.submit:hover:not(:disabled) { filter: brightness(1.12); }
.submit:disabled { opacity: 0.55; cursor: default; }

.msg {
  display: none; font-size: 12px; padding: 11px 13px; border-radius: 10px;
  margin-bottom: 17px; border: 1px solid var(--hairline); background: var(--field);
  line-height: 1.55;
}
.msg.show { display: block; }
.msg.err { color: var(--neg); border-color: color-mix(in srgb, var(--neg) 40%, transparent); background: color-mix(in srgb, var(--neg) 8%, transparent); }
.msg.ok { color: var(--pos); border-color: color-mix(in srgb, var(--pos) 40%, transparent); background: color-mix(in srgb, var(--pos) 8%, transparent); }

.setup-note {
  font-size: 12px; color: var(--ink-2); background: var(--accent-dim);
  border: 1px solid color-mix(in srgb, var(--accent) 28%, transparent);
  border-radius: 10px; padding: 11px 13px; margin-bottom: 17px; line-height: 1.6;
}
.foot-note { font-size: 10.5px; color: var(--ink-3); margin: 14px 0 0; text-align: center; }
.legal {
  font-family: var(--mono); text-align: center; color: var(--ink-3);
  font-size: 9.5px; margin: 20px 0 0; letter-spacing: 0.13em; text-transform: uppercase;
}
.hidden { display: none; }

@media (prefers-reduced-motion: reduce) {
  *, *::before { animation: none !important; transition: none !important; }
}