:root {
    --bg-deep: #020810;
    --bg-mid: #060e1a;
    --neon-cyan: #00f5ff;
    --neon-blue: #0088ff;
    --neon-purple: #8800ff;
    --neon-pink: #ff0088;
    --neon-green: #00ff88;
    --grid-color: rgba(0,245,255,0.06);
    --text-bright: #e8f4ff;
    --text-dim: rgba(232,244,255,0.5);
    --panel-bg: rgba(0,20,40,0.85);
    --panel-border: rgba(0,245,255,0.2);
  }

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

  body {
    --ui-zoom: 1.15;
    background: var(--bg-deep);
    color: var(--text-bright);
    font-family: 'Rajdhani', sans-serif;
    min-height: 100vh;
    overflow-x: hidden;
  }

  .app-zoom-shell {
    transform: scale(var(--ui-zoom));
    transform-origin: top center;
    width: calc(100% / var(--ui-zoom));
    min-height: calc(100vh / var(--ui-zoom));
    margin: 0 auto;
  }

  /* ── LOGIN SCREEN OVERLAY ── */
  #login-screen {
    position: fixed; inset: 0; z-index: 1000;
    display: flex; align-items: center; justify-content: center;
    background: rgba(2,8,16,0.92);
    backdrop-filter: blur(6px);
    transition: opacity 0.4s ease;
  }
  #login-screen.hidden {
    opacity: 0; pointer-events: none;
  }
  .login-panel {
    position: relative;
    background: var(--panel-bg);
    border: 1px solid var(--panel-border);
    box-shadow: 0 0 60px rgba(0,245,255,0.12), 0 0 120px rgba(136,0,255,0.08);
    padding: 48px 52px 40px;
    max-width: 440px; width: 90%;
    display: flex; flex-direction: column; align-items: center; gap: 0;
    clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 18px 100%, 0 calc(100% - 18px));
  }
  .login-logo {
    font-family: 'Orbitron', sans-serif;
    font-size: 30px; font-weight: 900;
    letter-spacing: 6px;
    background: linear-gradient(90deg, var(--neon-cyan), var(--neon-blue), var(--neon-purple));
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    margin-bottom: 4px;
  }
  .login-tagline {
    font-family: 'Rajdhani', sans-serif;
    font-size: 10px; letter-spacing: 8px;
    color: var(--neon-cyan); opacity: 0.65;
    margin-bottom: 24px;
  }
  .login-sub {
    font-family: 'Rajdhani', sans-serif;
    font-size: 13px; letter-spacing: 2px;
    color: var(--text-dim);
    margin-bottom: 28px; text-align: center;
  }
  .login-btns {
    display: flex; flex-direction: column; gap: 10px;
    width: 100%; margin-bottom: 14px;
  }
  .login-action-btn {
    display: flex; align-items: center; justify-content: center; gap: 10px;
    width: 100%; padding: 13px 20px;
    background: transparent;
    border: 1px solid var(--panel-border);
    color: var(--text-bright);
    font-family: 'Orbitron', sans-serif;
    font-size: 11px; font-weight: 700; letter-spacing: 2px;
    cursor: pointer; transition: all 0.15s;
  }
  .login-action-btn:hover {
    background: rgba(0,245,255,0.08);
    border-color: var(--neon-cyan);
    box-shadow: 0 0 14px rgba(0,245,255,0.25);
    color: var(--neon-cyan);
  }
  .login-google-btn:hover { border-color: #4285F4; box-shadow: 0 0 14px rgba(66,133,244,0.3); color: #4285F4; }
  .login-msg {
    font-family: 'Rajdhani', sans-serif;
    font-size: 12px; letter-spacing: 1px;
    color: var(--neon-green); min-height: 20px;
    text-align: center; margin-bottom: 8px;
  }
  .login-msg.error { color: var(--neon-pink); }
  .login-skip-btn {
    background: transparent; border: none;
    color: var(--text-dim);
    font-family: 'Rajdhani', sans-serif;
    font-size: 12px; letter-spacing: 3px;
    cursor: pointer; padding: 8px 16px;
    transition: color 0.15s;
    margin-top: 10px;
  }
  .login-skip-btn:hover { color: var(--text-bright); }

  /* ── AUTH CHIP ── */
  .auth-slot { display: inline-flex; align-items: center; margin-right: 12px; }
  .zoom-controls {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    margin-right: 12px;
    padding: 3px;
    border: 1px solid var(--panel-border);
    background: rgba(0,20,40,0.72);
  }
  .zoom-btn {
    min-width: 24px;
    height: 24px;
    background: transparent;
    border: 1px solid rgba(0,245,255,0.18);
    color: var(--neon-cyan);
    font-family: 'Orbitron', sans-serif;
    font-size: 14px;
    font-weight: 700;
    line-height: 1;
    cursor: pointer;
    transition: all 0.15s;
  }
  .zoom-btn:hover {
    background: rgba(0,245,255,0.1);
    border-color: var(--neon-cyan);
    box-shadow: 0 0 8px rgba(0,245,255,0.35);
  }
  .zoom-btn:disabled {
    opacity: 0.35;
    cursor: not-allowed;
    box-shadow: none;
  }
  .zoom-label {
    min-width: 42px;
    text-align: center;
    color: var(--text-dim);
    font-family: 'Orbitron', sans-serif;
    font-size: 9px;
    letter-spacing: 1px;
  }
  .auth-btn {
    background: transparent;
    border: 1px solid var(--panel-border);
    color: var(--neon-cyan);
    font-family: 'Orbitron', sans-serif;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 1.5px;
    padding: 6px 12px;
    cursor: pointer;
    transition: all 0.15s;
  }
  .auth-btn:hover { background: rgba(0,245,255,0.1); box-shadow: 0 0 8px rgba(0,245,255,0.4); }
  .auth-chip {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 4px 8px 4px 4px;
    border: 1px solid var(--panel-border);
    background: var(--panel-bg);
  }
  .auth-avatar { width: 22px; height: 22px; border-radius: 50%; display: block; }
  .auth-name {
    font-family: 'Orbitron', sans-serif;
    font-size: 10px;
    letter-spacing: 1px;
    color: var(--text-bright);
    max-width: 140px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
  .auth-signout {
    padding: 3px 8px;
    font-size: 9px;
    letter-spacing: 1px;
    color: var(--text-dim);
    border-color: rgba(255,255,255,0.12);
  }
  .auth-signout:hover { color: var(--neon-pink); border-color: var(--neon-pink); box-shadow: 0 0 6px rgba(255,0,136,0.4); }

  /* ── BACKGROUND ── */
  .bg-layer {
    position: fixed; inset: 0; z-index: 0; pointer-events: none;
  }
  .bg-grid {
    background-image:
      linear-gradient(var(--grid-color) 1px, transparent 1px),
      linear-gradient(90deg, var(--grid-color) 1px, transparent 1px);
    background-size: 60px 60px;
    width: 100%; height: 100%;
  }
  .bg-glow {
    position: absolute; inset: 0;
    background:
      radial-gradient(ellipse 80% 50% at 20% 20%, rgba(0,136,255,0.08) 0%, transparent 60%),
      radial-gradient(ellipse 60% 40% at 80% 80%, rgba(136,0,255,0.07) 0%, transparent 60%),
      radial-gradient(ellipse 40% 30% at 50% 50%, rgba(0,245,255,0.04) 0%, transparent 70%);
  }
  .scanline {
    position: absolute; inset: 0;
    background: repeating-linear-gradient(
      0deg, transparent, transparent 3px, rgba(0,0,0,0.08) 3px, rgba(0,0,0,0.08) 4px
    );
    animation: scanMove 8s linear infinite;
  }
  @keyframes scanMove {
    0% { transform: translateY(0); }
    100% { transform: translateY(4px); }
  }
  .particle {
    position: absolute; border-radius: 50%;
    animation: floatUp linear infinite;
    opacity: 0;
  }
  @keyframes floatUp {
    0%   { transform: translateY(100vh) scale(0); opacity:0; }
    10%  { opacity:1; }
    90%  { opacity:0.6; }
    100% { transform: translateY(-10vh) scale(1.5); opacity:0; }
  }

  /* ── HEADER ── */
  header {
    position: relative; z-index: 10;
    padding: 0 clamp(12px, 3vw, 40px);
    background: linear-gradient(180deg, rgba(2,8,16,0.98) 0%, rgba(2,8,16,0.8) 100%);
    border-bottom: 1px solid var(--panel-border);
    box-shadow: 0 0 40px rgba(0,245,255,0.1);
  }
  .header-top {
    display: flex; align-items: center; justify-content: space-between;
    flex-wrap: wrap; gap: 8px 12px;
    padding: 16px 0 10px;
  }
  .brand {
    display: flex; align-items: center; gap: 12px;
  }
  .brand-logo {
    height: 40px; width: auto;
    border-radius: 8px;
    filter: drop-shadow(0 0 10px rgba(0,245,255,0.35));
  }
  .logo {
    font-family: 'Orbitron', sans-serif;
    font-size: 28px; font-weight: 900;
    letter-spacing: 6px;
    background: linear-gradient(90deg, var(--neon-cyan), var(--neon-blue), var(--neon-purple));
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    text-shadow: none;
    position: relative;
  }
  .logo::after {
    content: 'NEXUS GAMES';
    position: absolute; inset: 0;
    background: linear-gradient(90deg, var(--neon-cyan), var(--neon-blue), var(--neon-purple));
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    filter: blur(8px); opacity: 0.5; z-index: -1;
  }
  .logo-sub {
    font-family: 'Rajdhani', sans-serif;
    font-size: 10px; letter-spacing: 8px;
    color: var(--neon-cyan); opacity: 0.7;
    margin-top: 2px; text-align: center;
  }
  .header-right {
    display: flex; align-items: center; flex-wrap: wrap; gap: 10px 20px;
  }
  .status-dot {
    width: 8px; height: 8px; border-radius: 50%;
    background: var(--neon-green);
    box-shadow: 0 0 10px var(--neon-green);
    animation: pulse 2s ease-in-out infinite;
  }
  @keyframes pulse {
    0%,100% { transform: scale(1); opacity:1; }
    50% { transform: scale(1.4); opacity:0.7; }
  }
  .status-text {
    font-size: 12px; letter-spacing: 2px;
    color: var(--neon-green); opacity: 0.8;
  }

  /* ── TABS ── */
  .tabs {
    display: flex; gap: 4px; padding-bottom: 0;
    overflow-x: auto;
  }
  .tab {
    flex: 0 0 auto;
    font-family: 'Orbitron', sans-serif;
    font-size: 11px; font-weight: 700;
    letter-spacing: 3px;
    padding: 12px 28px;
    background: transparent;
    border: none; border-bottom: 3px solid transparent;
    color: var(--text-dim);
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 10px 100%, 0 calc(100% - 10px));
  }
  .tab::before {
    content: '';
    position: absolute; inset: 0;
    background: transparent;
    transition: background 0.3s;
    clip-path: inherit;
  }
  .tab:hover::before {
    background: rgba(0,245,255,0.05);
  }
  .tab.active {
    color: var(--neon-cyan);
    border-bottom-color: var(--neon-cyan);
    text-shadow: 0 0 20px rgba(0,245,255,0.8);
  }
  .tab.active::before {
    background: rgba(0,245,255,0.08);
  }
  /* ── MAIN CONTENT ── */
  main {
    position: relative; z-index: 5;
    padding: clamp(10px, 2vw, 30px) clamp(12px, 3vw, 40px);
  }
  .tab-content { display: none; }
  .tab-content.active { display: block; }

  /* ── MEMBERSHIPS ── */
  .membership-plans {
    display: flex; gap: 28px; justify-content: center; flex-wrap: wrap;
    max-width: 780px; margin: 0 auto;
  }
  .membership-card {
    position: relative;
    flex: 1 1 300px; max-width: 320px;
    background: var(--panel-bg);
    border: 1px solid var(--panel-border);
    padding: 32px 28px 28px;
    display: flex; flex-direction: column; align-items: center; text-align: center; gap: 14px;
    clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 14px 100%, 0 calc(100% - 14px));
    transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
  }
  .membership-card:hover { transform: translateY(-4px); }
  .membership-card-pro {
    border-color: rgba(255,207,77,0.5);
    box-shadow: 0 0 40px rgba(255,207,77,0.08);
  }
  .membership-card-pro:hover { box-shadow: 0 0 40px rgba(255,207,77,0.22); }
  .membership-card-max {
    border-color: rgba(136,0,255,0.5);
    box-shadow: 0 0 40px rgba(136,0,255,0.1);
  }
  .membership-card-max:hover { box-shadow: 0 0 40px rgba(136,0,255,0.26); }
  .membership-card-active { border-color: var(--neon-green); box-shadow: 0 0 40px rgba(0,255,136,0.18); }
  .membership-badge {
    position: absolute; top: 14px; left: 50%; transform: translateX(-50%);
    font-family: 'Orbitron', sans-serif; font-size: 10px; font-weight: 700; letter-spacing: 2px;
    background: linear-gradient(135deg,#ffcf4d,#a3690f); color: #1a1204;
    padding: 4px 14px;
    clip-path: polygon(0 0, calc(100% - 8px) 0, 100% 8px, 100% 100%, 8px 100%, 0 calc(100% - 8px));
  }
  .membership-card-pro, .membership-card-max { padding-top: 44px; }
  .membership-badge-max { background: linear-gradient(135deg,#c79bff,#5a1fa8); color: #150a29; }
  .membership-name {
    font-family: 'Orbitron', sans-serif; font-size: 16px; font-weight: 900; letter-spacing: 4px;
    color: var(--text-bright);
  }
  .membership-price {
    font-family: 'Orbitron', sans-serif; font-size: 40px; font-weight: 900;
    color: var(--neon-cyan); text-shadow: 0 0 20px rgba(0,245,255,0.5);
  }
  .membership-card-pro .membership-price { color: #ffcf4d; text-shadow: 0 0 20px rgba(255,207,77,0.5); }
  .membership-card-max .membership-price { color: #c79bff; text-shadow: 0 0 20px rgba(136,0,255,0.5); }
  .membership-period { font-size: 14px; font-weight: 400; color: var(--text-dim); letter-spacing: 1px; }
  .membership-features {
    list-style: none; padding: 0; margin: 4px 0; width: 100%;
    display: flex; flex-direction: column; gap: 10px;
    font-size: 13px; letter-spacing: 0.5px; color: var(--text-dim); text-align: left;
  }
  .membership-btn {
    width: 100%; margin-top: auto;
    font-family: 'Orbitron', sans-serif; font-size: 11px; font-weight: 700; letter-spacing: 2px;
    padding: 14px 10px;
    border: 1px solid var(--neon-cyan); background: rgba(0,245,255,0.08); color: var(--neon-cyan);
    cursor: pointer; transition: all 0.25s ease;
    clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 10px 100%, 0 calc(100% - 10px));
  }
  .membership-btn-upgrade { border-color: #ffcf4d; background: rgba(255,207,77,0.1); color: #ffcf4d; }
  .membership-btn-upgrade:hover { background: rgba(255,207,77,0.22); box-shadow: 0 0 25px rgba(255,207,77,0.3); }
  .membership-btn-upgrade-max { border-color: #c79bff; background: rgba(136,0,255,0.1); color: #c79bff; }
  .membership-btn-upgrade-max:hover { background: rgba(136,0,255,0.22); box-shadow: 0 0 25px rgba(136,0,255,0.3); }
  .membership-btn-current, .membership-btn:disabled {
    border-color: rgba(255,255,255,0.15); background: transparent; color: var(--text-dim); cursor: default;
  }
  .membership-status {
    text-align: center; margin-top: 20px;
    font-size: 13px; letter-spacing: 1px; color: var(--neon-green);
  }

  /* ── RESPONSIVE ── */
  @media (max-width: 900px) {
    .logo { font-size: 20px; letter-spacing: 3px; }
    .logo-sub { font-size: 8px; letter-spacing: 4px; }
    .tab { font-size: 9px; letter-spacing: 2px; padding: 10px 14px; }
  }
  @media (max-width: 600px) {
    .header-top { padding: 10px 0 6px; }
    .logo { font-size: 16px; letter-spacing: 2px; }
    .brand-logo { height: 28px; }
    .status-text { display: none; }
    .zoom-controls { order: 3; width: 100%; justify-content: center; margin: 8px 0 0; }
    .tab { font-size: 8px; letter-spacing: 1px; padding: 8px 10px; }
  }
  /* Short viewports generally (common laptop heights included) — trim the
     chrome so the game itself has more room to breathe. */
  @media (max-height: 850px) {
    .header-top { padding: 8px 0 4px; }
    .logo-sub { display: none; }
    .tab { padding: 8px 18px; }
    main { padding: clamp(6px, 1.5vw, 16px) clamp(12px, 3vw, 40px); }
  }
  /* Short/landscape viewports (e.g. a phone on its side): the header must not
     eat the little vertical space there is, so the game stays visible. */
  @media (max-height: 500px) and (orientation: landscape) {
    header { padding: 0 clamp(10px, 2vw, 24px); }
    .header-top { padding: 4px 0; }
    .logo { font-size: 14px; letter-spacing: 2px; }
    .logo-sub, .status-text { display: none; }
    .header-right { gap: 6px 10px; }
    .zoom-controls { padding: 2px; margin-right: 6px; }
    .zoom-btn { min-width: 18px; height: 18px; font-size: 11px; }
    .zoom-label { font-size: 8px; min-width: 30px; }
    .auth-btn, .auth-chip { padding: 3px 8px; font-size: 9px; }
    .tab { font-size: 8px; letter-spacing: 1px; padding: 5px 10px; }
    main { padding: 4px clamp(10px, 2vw, 24px); }
  }