/* 28 Cards Game - © 2026 sbpaul. All rights reserved.
   Unauthorized copying, modification or distribution of this file is prohibited. */

  :root {
    --bg: #000;
    --gold: #d4af37;
    --gold-dark: #a5822a;
    --felt-green: #0c7c1b;
    --panel-bg: #16161f;
    --panel-bg-2: #111117;
    --text-light: #f0f0f0;
    --text-dim: #aaa;
    --error-red: #ff5252;
    --error-text: #ff8a8a;
    --border-dim: #333;
    --hint-text: #777;
    --header-grad-1: #2a220d;
    --header-grad-2: #1a1608;
    --success-text: #7be3a0;
  }

  body[data-theme="light"] {
    --bg: #f4f4f6;
    --gold: #6b5109;
    --gold-dark: #4d3b06;
    --panel-bg: #ffffff;
    --panel-bg-2: #f0f0f0;
    --text-light: #1a1a1a;
    --text-dim: #555;
    --error-red: #c62828;
    --error-text: #c62828;
    --border-dim: #ddd;
    --hint-text: #888;
    --header-grad-1: #f0e6c8;
    --header-grad-2: #e8dab0;
    --success-text: #1e7a45;
  }

  * { box-sizing: border-box; }

  body {
    margin: 0;
    min-height: 100vh;
    font-family: Arial, sans-serif;
    background-color: var(--bg);
    color: var(--text-light);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 20px;
    transition: background-color 0.15s, color 0.15s;
  }

  .theme-toggle-btn {
    position: fixed;
    top: 16px;
    right: 16px;
    background: none;
    border: 1px solid var(--text-dim);
    color: var(--text-dim);
    border-radius: 6px;
    padding: 6px 12px;
    font-size: 0.78rem;
    font-weight: bold;
    cursor: pointer;
  }
  .theme-toggle-btn:hover { border-color: var(--gold); color: var(--gold); }

  .auth-card {
    width: 100%;
    max-width: 400px;
    background: var(--panel-bg);
    border: 1.5px solid var(--gold);
    border-radius: 14px;
    box-shadow: 0 20px 50px rgba(0,0,0,0.7);
    overflow: hidden;
  }

  .auth-header {
    background: linear-gradient(135deg, var(--header-grad-1), var(--header-grad-2));
    border-bottom: 1px solid var(--gold);
    padding: 26px 24px 20px;
    text-align: center;
  }

  .auth-header .title {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--gold);
    letter-spacing: 0.5px;
  }

  .auth-header .title span.num { color: var(--error-red); }
  .auth-header .subtitle {
    margin-top: 4px;
    font-size: 0.82rem;
    color: var(--text-dim);
  }

  .auth-body { padding: 24px; }

  .tab-row {
    display: flex;
    margin-bottom: 20px;
    border-bottom: 1px solid var(--border-dim);
  }

  .tab-btn {
    flex: 1;
    background: none;
    border: none;
    padding: 10px 0;
    font-size: 0.9rem;
    font-weight: bold;
    color: var(--text-dim);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: color 0.15s, border-color 0.15s;
  }

  .tab-btn.active {
    color: var(--gold);
    border-bottom-color: var(--gold);
  }

  .field-group { margin-bottom: 14px; }

  .field-group label {
    display: block;
    font-size: 0.78rem;
    color: var(--text-dim);
    margin-bottom: 5px;
  }

  .field-group input {
    width: 100%;
    background: var(--panel-bg-2);
    border: 1px solid var(--border-dim);
    border-radius: 6px;
    padding: 10px 12px;
    color: var(--text-light);
    font-size: 0.92rem;
    outline: none;
    transition: border-color 0.15s;
  }

  .field-group input:focus { border-color: var(--gold); }

  .submit-btn {
    width: 100%;
    background: linear-gradient(135deg, var(--gold), var(--gold-dark));
    border: none;
    border-radius: 8px;
    padding: 12px 0;
    font-weight: bold;
    font-size: 0.95rem;
    color: #1a1608;
    cursor: pointer;
    margin-top: 6px;
    transition: filter 0.15s;
  }

  .submit-btn:hover { filter: brightness(1.08); }
  body[data-theme="light"] .submit-btn { color: #fff; } /* readable on the dark gold of Day mode (10 Oct) */
  .submit-btn:disabled { opacity: 0.6; cursor: not-allowed; }

  .form-panel { display: none; }
  .form-panel.active { display: block; }

  .msg-box {
    display: none;
    font-size: 0.8rem;
    padding: 9px 11px;
    border-radius: 6px;
    margin-bottom: 14px;
    line-height: 1.4;
  }

  .msg-box.error { display: block; background: rgba(255,82,82,0.12); border: 1px solid rgba(255,82,82,0.4); color: var(--error-text); }
  .msg-box.success { display: block; background: rgba(46,204,113,0.12); border: 1px solid rgba(46,204,113,0.4); color: var(--success-text); }
  .msg-box.info { display: block; background: rgba(212,175,55,0.12); border: 1px solid rgba(212,175,55,0.4); color: var(--gold); }
  .msg-box.maintenance {
    display: block;
    background: rgba(255,82,82,0.16);
    border: 2px solid var(--error-red);
    color: #ff5252;
    font-size: 0.95rem;
    font-weight: bold;
    text-align: center;
    padding: 14px 16px;
  }

  .hint-text {
    font-size: 0.72rem;
    color: var(--hint-text);
    margin-top: -8px;
    margin-bottom: 14px;
  }