:root {
    --accent:    #4f46e5;
    --accent-dk: #4338ca;
    --accent-lt: #eef2ff;
    --success:   #10b981;
    --success-dk:#059669;
    --border:    rgba(255,255,255,0.18);
    --input-bg:  rgba(255,255,255,0.10);
    --text:      #ffffff;
    --muted:     rgba(255,255,255,0.55);
    --radius:    18px;
    --radius-sm: 11px;
  }

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

  body {
    min-height: 100vh;
    font-family: 'Segoe UI', sans-serif;
    background: linear-gradient(135deg, #0f172a 0%, #1e1b4b 50%, #1e3a8a 100%);
    overflow: hidden;
    display: flex;
  }

  /* Subtle background orbs */
  body::before, body::after {
    content: '';
    position: fixed;
    border-radius: 50%;
    filter: blur(80px);
    pointer-events: none;
    z-index: 0;
  }
  body::before {
    width: 420px; height: 420px;
    background: rgba(79,70,229,0.25);
    top: -100px; left: -80px;
  }
  body::after {
    width: 320px; height: 320px;
    background: rgba(16,185,129,0.15);
    bottom: -80px; right: 30%;
  }

  /* ── LAYOUT ── */
  .container-main {
    display: flex;
    width: 100%;
    min-height: 100vh;
    position: relative;
    z-index: 1;
  }

  /* ── LEFT PANEL ── */
  .left-panel {
    flex: 1;
    padding: 64px 72px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    color: var(--text);
  }

  .brand-chip {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255,255,255,0.08);
    border: 1px solid var(--border);
    border-radius: 100px;
    padding: 6px 16px;
    font-size: 12px;
    font-weight: 600;
    color: rgba(255,255,255,0.7);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 28px;
    width: fit-content;
  }

  .brand-dot {
    width: 7px; height: 7px;
    border-radius: 50%;
    background: var(--success);
    animation: glow 2s infinite;
  }

  @keyframes glow {
    0%,100% { box-shadow: 0 0 0 0 rgba(16,185,129,0.6); }
    50%      { box-shadow: 0 0 0 5px rgba(16,185,129,0); }
  }

  .left-panel h1 {
    font-size: clamp(30px, 3.5vw, 48px);
    font-weight: 700;
    line-height: 1.15;
    letter-spacing: -0.5px;
    margin-bottom: 16px;
  }

  .left-panel h1 span {
    background: linear-gradient(135deg, #a5b4fc, #67e8f9);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
  }

  .left-panel p {
    color: var(--muted);
    font-size: 16px;
    line-height: 1.6;
    max-width: 380px;
    margin-bottom: 40px;
  }

  /* Feature chips */
  .feature-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
  }

  .feature-item {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 14px;
    color: rgba(255,255,255,0.75);
  }

  .feature-icon {
    width: 32px; height: 32px;
    border-radius: 9px;
    background: rgba(255,255,255,0.08);
    border: 1px solid var(--border);
    display: flex; align-items: center; justify-content: center;
    font-size: 15px;
    flex-shrink: 0;
  }

  /* ── RIGHT PANEL ── */
  .right-panel {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 32px 24px;
  }

  /* ── GLASS CARD ── */
  .auth-card {
    width: 100%;
    max-width: 420px;
    padding: 36px 32px;
    border-radius: var(--radius);
    background: rgba(255,255,255,0.07);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border);
    box-shadow: 0 24px 60px rgba(0,0,0,0.35), inset 0 1px 0 rgba(255,255,255,0.12);
  }

  .auth-card-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 6px;
  }

  .auth-card-sub {
    font-size: 13px;
    color: var(--muted);
    margin-bottom: 24px;
  }

  /* ── TABS ── */
  .tab-row {
    display: flex;
    background: rgba(0,0,0,0.2);
    border-radius: 100px;
    padding: 4px;
    margin-bottom: 26px;
    gap: 4px;
  }

  .tab-btn {
    flex: 1;
    padding: 9px;
    border-radius: 100px;
    border: none;
    background: transparent;
    color: var(--muted);
    font-family: 'Segoe UI', sans-serif;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
  }

  .tab-btn.active {
    background: var(--accent);
    color: #fff;
    box-shadow: 0 4px 14px rgba(79,70,229,0.4);
  }

  /* ── INPUTS ── */
  .field {
    margin-bottom: 13px;
  }

  .field label {
    display: block;
    font-size: 11.5px;
    font-weight: 600;
    color: rgba(255,255,255,0.6);
    text-transform: uppercase;
    letter-spacing: 0.7px;
    margin-bottom: 6px;
  }

  .form-control {
    width: 100%;
    background: var(--input-bg);
    border: 1px solid rgba(255,255,255,0.12);
    border-radius: var(--radius-sm);
    color: var(--text);
    font-family: 'Segoe UI', sans-serif;
    font-size: 14px;
    padding: 11px 14px;
    outline: none;
    transition: border-color 0.18s, box-shadow 0.18s;
    appearance: none;
    -webkit-appearance: none;
  }

  .form-control::placeholder { color: rgba(255,255,255,0.3); }

  .form-control:focus {
    border-color: rgba(99,102,241,0.7);
    box-shadow: 0 0 0 3px rgba(79,70,229,0.2);
  }

  select.form-control {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='rgba(255,255,255,0.4)' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 14px center;
    padding-right: 36px;
  }

  select.form-control option { background: #1e1b4b; color: #fff; }

  /* ── BUTTONS ── */
  .btn-primary, .btn-success {
    width: 100%;
    padding: 12px;
    border: none;
    border-radius: var(--radius-sm);
    font-family: 'Segoe UI', sans-serif;
    font-size: 14px;
    font-weight: 700;
    cursor: pointer;
    margin-top: 6px;
    transition: all 0.18s;
    letter-spacing: 0.3px;
  }

  .btn-primary {
    background: var(--accent);
    color: #fff;
    box-shadow: 0 4px 16px rgba(79,70,229,0.35);
  }

  .btn-primary:hover {
    background: var(--accent-dk);
    box-shadow: 0 6px 22px rgba(79,70,229,0.5);
    transform: translateY(-1px);
  }

  .btn-success {
    background: var(--success);
    color: #fff;
    box-shadow: 0 4px 16px rgba(16,185,129,0.35);
  }

  .btn-success:hover {
    background: var(--success-dk);
    box-shadow: 0 6px 22px rgba(16,185,129,0.45);
    transform: translateY(-1px);
  }

  /* ── DIVIDER ── */
  .form-row-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
  }

  /* ── TOAST ── */
  .toast-bar {
    position: fixed;
    bottom: 28px;
    left: 50%;
    transform: translateX(-50%) translateY(80px);
    background: #1e293b;
    color: #fff;
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 100px;
    padding: 12px 24px;
    font-size: 13px;
    font-weight: 500;
    z-index: 999;
    transition: transform 0.3s ease;
    white-space: nowrap;
  }

  .toast-bar.show { transform: translateX(-50%) translateY(0); }
  .toast-bar.error { border-color: rgba(239,68,68,0.4); background: #450a0a; }
  .toast-bar.success { border-color: rgba(16,185,129,0.4); background: #022c22; }

  /* ── MOBILE ── */
  @media (max-width: 768px) {
    body { overflow: auto; }
    .container-main { flex-direction: column; }
    .left-panel {
      padding: 40px 28px 28px;
      flex: none;
    }
    .left-panel h1 { font-size: 26px; }
    .left-panel p { font-size: 14px; margin-bottom: 20px; }
    .feature-list { display: none; }
    .right-panel { padding: 16px 20px 48px; align-items: flex-start; }
    .auth-card { padding: 28px 22px; }
  }