/* ── Reset ─────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* ── Tokens (mirrors style.css) ────────────────────────────── */
:root {
  --bg:      #1b1b1b;
  --bg2:     #242424;
  --bg3:     #2c2c2c;
  --bg4:     #383838;
  --border:  #404040;
  --border2: #5c5c5c;
  --text:    #e0e0e0;
  --text2:   #aaaaaa;
  --text3:   #7a7a7a;
  --accent:  #e07838;
  --danger:  #f44747;
  --font:    'Consolas', 'Courier New', monospace;
}

[data-theme="light"] {
  --bg:      #e8ecf0;
  --bg2:     #ffffff;
  --bg3:     #dde2e8;
  --bg4:     #cdd3db;
  --border:  #adb5c0;
  --border2: #7e8899;
  --text:    #0c1017;
  --text2:   #333d4d;
  --text3:   #60697a;
  --accent:  #bf4800;
  --danger:  #c01818;
}

html, body {
  min-height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px 20px;
}

/* ── Decorative background grid ────────────────────────────── */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 40px 40px;
  opacity: .35;
  pointer-events: none;
  z-index: 0;
}

/* ── Card ───────────────────────────────────────────────────── */
.auth-card {
  position: relative;
  z-index: 1;
  background: var(--bg2);
  border: 1px solid var(--border2);
  border-radius: 12px;
  width: min(400px, 100%);
  padding: 36px 32px 32px;
  box-shadow: 0 12px 48px rgba(0,0,0,.55), 0 2px 8px rgba(0,0,0,.3);
}

/* ── Forms wrapper: register stays in flow (larger = determines height).
   Login and change-password are absolutely positioned on top.
   Only visibility is toggled, never the flow. ────────────────── */
.forms-wrapper {
  position: relative;
}

#form-login,
#form-change-pwd {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
}

.auth-form.form-hidden {
  visibility: hidden;
  pointer-events: none;
}

/* ── Logo / brand ───────────────────────────────────────────── */
.auth-logo {
  font-size: 20px;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 28px;
  text-align: center;
  font-weight: 700;
}

/* ── Tabs ───────────────────────────────────────────────────── */
.auth-tabs {
  display: flex;
  border: 1px solid var(--border2);
  border-radius: 7px;
  overflow: hidden;
  margin-bottom: 24px;
  background: var(--bg3);
}

.auth-tab {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--text3);
  font-family: var(--font);
  font-size: 13px;
  padding: 10px 0;
  cursor: pointer;
  transition: background .15s, color .15s;
  letter-spacing: 0.03em;
}
.auth-tab:first-child { border-right: 1px solid var(--border2); }
.auth-tab:hover       { background: var(--bg4); color: var(--text2); }
.auth-tab.active      { background: var(--bg4); color: var(--accent); }

/* ── Error banner ───────────────────────────────────────────── */
.auth-error {
  background: rgba(240,98,98,.1);
  border: 1px solid rgba(240,98,98,.35);
  border-radius: 6px;
  color: var(--danger);
  font-size: 13px;
  padding: 10px 12px;
  margin-bottom: 18px;
  line-height: 1.5;
}

/* ── Form ───────────────────────────────────────────────────── */
.auth-form { display: flex; flex-direction: column; gap: 6px; }

.auth-label {
  font-size: 11px;
  color: var(--text3);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-top: 10px;
}
.auth-form > .auth-label:first-child { margin-top: 0; }

.auth-hint {
  font-size: 11px;
  color: var(--text3);
  margin-top: -2px;
  margin-bottom: 4px;
}

.input-wrap {
  position: relative;
  display: flex;
  align-items: center;
}

.auth-input {
  width: 100%;
  background: var(--bg3);
  border: 1px solid var(--border2);
  border-radius: 6px;
  color: var(--text);
  font-family: var(--font);
  font-size: 15px;
  padding: 10px 38px 10px 12px;
  outline: none;
  transition: border-color .15s, box-shadow .15s;
}
.auth-input:focus  {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(91,141,255,.15);
}
.auth-input::placeholder { color: var(--text3); }

/* When not inside .input-wrap */
.auth-form > .auth-input { padding-right: 12px; }

.eye-btn {
  position: absolute; right: 10px;
  background: none; border: none;
  cursor: pointer; font-size: 15px;
  opacity: 0.45; padding: 4px; line-height: 1;
  color: var(--text2); transition: opacity .1s;
}
.eye-btn:hover { opacity: 0.9; }

/* ── Submit button ──────────────────────────────────────────── */
.auth-btn {
  margin-top: 20px;
  width: 100%;
  background: var(--accent);
  border: none; border-radius: 6px;
  color: #fff; font-family: var(--font); font-size: 15px;
  padding: 12px 0; cursor: pointer;
  transition: opacity .15s, box-shadow .15s;
  letter-spacing: 0.04em;
  box-shadow: 0 4px 16px rgba(91,141,255,.25);
}
.auth-btn:hover    { opacity: 0.9; box-shadow: 0 6px 20px rgba(91,141,255,.35); }
.auth-btn:disabled { cursor: not-allowed; opacity: 0.5; box-shadow: none; }

/* ── Theme toggle (bottom of card) ─────────────────────────── */
.auth-theme-row {
  margin-top: 20px;
  text-align: center;
}
.auth-theme-btn {
  background: none; border: 1px solid var(--border);
  border-radius: 5px; color: var(--text3); cursor: pointer;
  font-family: var(--font); font-size: 12px;
  padding: 5px 14px;
  transition: color .12s, border-color .12s, background .12s;
}
.auth-theme-btn:hover { color: var(--accent); border-color: var(--accent); background: rgba(91,141,255,.08); }

/* ── Scrollbar ──────────────────────────────────────────────── */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg2); }
::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 4px; }

/* ── Must-change-password notice ────────────────────────── */
.change-pwd-notice {
  background: rgba(224,120,56,.1);
  border: 1px solid rgba(224,120,56,.35);
  border-radius: 6px;
  color: var(--accent);
  font-size: 13px;
  padding: 10px 12px;
  margin-bottom: 6px;
  line-height: 1.5;
}