/* ============================================================
   reikos.me — 登入頁（Vercel-inspired design system）
   canvas-soft body / white card / ink pill / mesh gradient
   ============================================================ */

:root {
  /* Surfaces */
  --canvas: #ffffff;
  --canvas-soft: #fafafa;
  --canvas-soft-2: #f5f5f5;

  /* Ink & text */
  --primary: #171717;
  --ink: #171717;
  --body: #4d4d4d;
  --mute: #888888;
  --on-primary: #ffffff;

  /* Lines */
  --hairline: #ebebeb;
  --hairline-strong: #a1a1a1;

  /* Accent */
  --link: #0070f3;
  --cyan: #50e3c2;
  --pink: #ff0080;
  --violet: #7928ca;
  --error: #ee0000;
  --error-deep: #c50000;
  --success: #0070f3;

  /* Gradient stops */
  --g-develop-start: #007cf0;
  --g-develop-end: #00dfd8;
  --g-preview-start: #7928ca;
  --g-preview-end: #ff0080;
  --g-ship-start: #ff4d4d;
  --g-ship-end: #f9cb28;

  /* Radius */
  --r-xs: 4px;
  --r-sm: 6px;
  --r-md: 8px;
  --r-lg: 12px;
  --r-pill: 100px;

  /* Spacing */
  --s-xs: 8px;
  --s-sm: 12px;
  --s-md: 16px;
  --s-lg: 24px;
  --s-xl: 32px;

  /* Stacked shadows + inset hairline (Vercel elevation ladder) */
  --sh-1: inset 0 0 0 1px rgba(0, 0, 0, 0.08);
  --sh-4: 0px 2px 2px #0000000a, 0px 8px 16px -4px #0000000a, inset 0 0 0 1px rgba(0, 0, 0, 0.08);
  --sh-5: 0px 1px 1px #00000005, 0px 8px 16px -4px #0000000a, 0px 24px 32px -8px #0000000f, inset 0 0 0 1px rgba(0, 0, 0, 0.08);
}

* { box-sizing: border-box; }

/* 確保 hidden 屬性勝過類別的 display 設定（.done / .auth-foot 皆為 flex） */
[hidden] { display: none !important; }

html, body { height: 100%; }

body {
  margin: 0;
  min-height: 100%;
  background: var(--canvas-soft);
  color: var(--ink);
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 24px;
  -webkit-font-smoothing: antialiased;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--s-lg);
  overflow-x: hidden;
}

.mono-label,
.eyebrow {
  font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 12px;
  line-height: 16px;
  letter-spacing: 0;
}

.eyebrow {
  margin: 0 0 var(--s-xs);
  color: var(--mute);
  text-transform: uppercase;
}

/* ---------------- Mesh gradient backdrop ---------------- */
.mesh {
  position: fixed;
  top: -140px;
  left: 50%;
  transform: translateX(-50%);
  width: 120vw;
  max-width: 1600px;
  height: 520px;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(closest-side at 22% 30%, var(--g-develop-start) 0%, transparent 70%),
    radial-gradient(closest-side at 55% 10%, var(--g-develop-end) 0%, transparent 70%),
    radial-gradient(closest-side at 78% 55%, var(--g-preview-start) 0%, transparent 72%),
    radial-gradient(closest-side at 92% 20%, var(--g-preview-end) 0%, transparent 70%),
    radial-gradient(closest-side at 8% 70%, var(--g-ship-end) 0%, transparent 70%);
  opacity: 0.42;
  filter: blur(10px);
}

/* ---------------- Auth card ---------------- */
.auth-wrap {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 420px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--s-md);
}

.auth-card {
  width: 100%;
  background: var(--canvas);
  border-radius: var(--r-lg);
  box-shadow: var(--sh-5);
  padding: var(--s-xl);
}

.brand { display: flex; align-items: center; gap: var(--s-xs); margin-bottom: var(--s-xl); }
.brand-logo {
  width: 20px; height: 20px; border-radius: var(--r-xs);
  background: conic-gradient(from 210deg, var(--g-develop-start), var(--g-develop-end),
    var(--g-preview-start), var(--g-preview-end), var(--g-ship-end), var(--g-develop-start));
}
.brand-name { font-weight: 600; letter-spacing: -0.4px; }
.badge-secondary {
  background: var(--canvas-soft-2);
  color: var(--body);
  font-size: 12px;
  line-height: 16px;
  padding: 2px 8px;
  border-radius: var(--r-pill);
}

.auth-title {
  margin: 0 0 6px;
  font-size: 24px;
  line-height: 32px;
  font-weight: 600;
  letter-spacing: -0.96px;
}
.auth-sub {
  margin: 0 0 var(--s-lg);
  color: var(--body);
  font-size: 14px;
  line-height: 20px;
  letter-spacing: -0.28px;
}

/* ---------------- Form ---------------- */
.field { display: flex; flex-direction: column; gap: 6px; margin-bottom: var(--s-md); }
.field-label { font-size: 12px; line-height: 16px; color: var(--body); }

.form-input {
  width: 100%;
  font-family: inherit;
  font-size: 14px;
  line-height: 22px;
  color: var(--ink);
  background: var(--canvas);
  border: 1px solid var(--hairline);
  border-radius: var(--r-sm);
  padding: 8px 12px;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.form-input::placeholder { color: var(--mute); }
.form-input:focus { border-color: var(--ink); box-shadow: 0 0 0 3px rgba(23, 23, 23, 0.08); }

.turnstile-slot { margin-bottom: var(--s-md); min-height: 65px; }

.btn-primary {
  width: 100%;
  font-family: inherit;
  font-size: 14px; font-weight: 500;
  height: 44px; padding: 0 20px;
  background: var(--primary);
  color: var(--on-primary);
  border: 0;
  border-radius: var(--r-pill);
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.15s, transform 0.1s;
}
.btn-primary:hover { opacity: 0.85; }
.btn-primary:active { transform: scale(0.98); }
.btn-primary:disabled { opacity: 0.4; cursor: not-allowed; }

.btn-secondary {
  width: 100%;
  font-family: inherit;
  font-size: 14px; font-weight: 500;
  height: 44px; padding: 0 20px;
  background: var(--canvas);
  color: var(--ink);
  border: 0;
  box-shadow: var(--sh-1);
  border-radius: var(--r-pill);
  cursor: pointer;
  transition: background 0.15s;
}
.btn-secondary:hover { background: var(--canvas-soft-2); }

.auth-msg {
  margin: var(--s-md) 0 0;
  min-height: 20px;
  font-size: 13px;
  line-height: 20px;
  color: var(--body);
}
.auth-msg.err { color: var(--error-deep); }
.auth-msg.ok { color: var(--link); }

.auth-foot {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: var(--s-lg);
  padding-top: var(--s-md);
  border-top: 1px solid var(--hairline);
}
.link-btn {
  font-family: inherit;
  font-size: 13px;
  font-weight: 500;
  color: var(--link);
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
}
.link-btn:hover { text-decoration: underline; }

/* ---------------- Logged-in state ---------------- */
.done {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--s-sm);
  text-align: center;
}
.done-mark {
  width: 44px; height: 44px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 9999px;
  background: var(--canvas-soft-2);
  color: var(--primary);
  font-size: 20px;
  margin-bottom: var(--s-xs);
}
.done-sub { color: var(--body); margin: 0 0 var(--s-md); }

.foot-note { color: var(--mute); }

/* ---------------- Responsive ---------------- */
@media (max-width: 480px) {
  body { padding: var(--s-md); }
  .auth-card { padding: var(--s-lg); }
  .mesh { height: 420px; }
}