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

      html,
      body {
        height: 100%;
        background:
          radial-gradient(
            ellipse at 18% 28%,
            rgba(70, 22, 170, 0.28) 0%,
            transparent 55%
          ),
          radial-gradient(
            ellipse at 82% 72%,
            rgba(22, 50, 190, 0.2) 0%,
            transparent 55%
          ),
          radial-gradient(
            ellipse at 50% 50%,
            rgba(40, 10, 100, 0.15) 0%,
            transparent 70%
          ),
          #060213;
        font-family:
          Inter,
          Segoe UI,
          Arial,
          sans-serif;
        color: #fff;
        overflow-x: hidden;
      }

      /* ── Page center ── */
      .page {
        position: relative;
        z-index: 2;
        min-height: 100vh;
        display: flex;
        align-items: center;
        justify-content: center;
        padding: 24px;
      }

      /* ── Login card ── */
      .card {
        position: relative;
        width: 100%;
        max-width: 395px;
        background: linear-gradient(
          160deg,
          rgba(14, 9, 34, 0.93),
          rgba(22, 12, 52, 0.89),
          rgba(10, 6, 26, 0.95)
        );
        border: 1.5px solid rgba(180, 130, 255, 0.28);
        border-radius: 22px;
        padding: 44px 40px 36px;
        backdrop-filter: blur(28px);
        box-shadow:
          0 30px 90px rgba(0, 0, 0, 0.72),
          0 0 80px rgba(100, 40, 200, 0.1),
          inset 0 1px 0 rgba(255, 255, 255, 0.05);
        animation: card-in 0.55s cubic-bezier(0.22, 0.68, 0, 1.15) both;
      }
      .card::before {
        content: "";
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        height: 2px;
        background: linear-gradient(
          90deg,
          transparent,
          rgba(200, 140, 255, 0.75),
          rgba(255, 200, 70, 0.6),
          transparent
        );
        border-radius: 22px 22px 0 0;
      }
      @keyframes card-in {
        from {
          opacity: 0;
          transform: translateY(24px) scale(0.95);
        }
        to {
          opacity: 1;
          transform: none;
        }
      }

      /* ── Logo ── */
      .logo {
        text-align: center;
        margin-bottom: 34px;
      }
      .logo-ico {
        font-size: 50px;
        display: block;
        margin-bottom: 12px;
        filter: drop-shadow(0 0 24px rgba(255, 180, 30, 0.75));
        animation: ico-float 4.5s ease-in-out infinite;
      }
      @keyframes ico-float {
        0%,
        100% {
          transform: translateY(0);
        }
        50% {
          transform: translateY(-7px);
        }
      }
      .logo-name {
        font-family:
          Inter,
          Segoe UI,
          Arial,
          sans-serif;
        font-size: 26px;
        font-weight: 900;
        letter-spacing: 3.5px;
        background: linear-gradient(
          90deg,
          #ffd700,
          #ffb020,
          #ffe066,
          #c88cff,
          #7744ee,
          #4488ff,
          #ffe066,
          #ffd700
        );
        background-size: 300% auto;
        -webkit-background-clip: text;
        background-clip: text;
        -webkit-text-fill-color: transparent;
        animation: logo-flow 7s linear infinite;
        -webkit-transform: translate3d(0, 0, 0);
        transform: translate3d(0, 0, 0);
        -webkit-backface-visibility: hidden;
        backface-visibility: hidden;
        margin-bottom: 8px;
      }
      @keyframes logo-flow {
        0% {
          background-position: 0% center;
        }
        100% {
          background-position: 300% center;
        }
      }
      .logo-tag {
        font-size: 11px;
        color: rgba(170, 148, 225, 0.62);
        font-style: italic;
        letter-spacing: 0.6px;
      }

      /* ── Field ── */
      .field-lbl {
        display: block;
        font-size: 10px;
        text-transform: uppercase;
        letter-spacing: 1.4px;
        color: rgba(170, 138, 255, 0.65);
        font-weight: 700;
        margin-bottom: 8px;
      }
      .input-row {
        display: flex;
        align-items: center;
        background: rgba(255, 255, 255, 0.04);
        border: 1.5px solid rgba(140, 100, 255, 0.28);
        border-radius: 11px;
        overflow: hidden;
        transition:
          border-color 0.18s,
          box-shadow 0.18s;
        margin-bottom: 6px;
      }
      .input-row:focus-within {
        border-color: rgba(190, 138, 255, 0.65);
        box-shadow: 0 0 0 3px rgba(155, 88, 255, 0.1);
      }
      .input-at {
        padding: 0 8px 0 16px;
        font-size: 17px;
        color: rgba(155, 128, 255, 0.52);
        user-select: none;
      }
      .input-row input {
        flex: 1;
        background: none;
        border: none;
        outline: none;
        padding: 13px 16px 13px 0;
        color: rgba(225, 215, 255, 0.88);
        font-family:
          Inter,
          Segoe UI,
          Arial,
          sans-serif;
        font-size: 14px;
        font-weight: 500;
      }
      .input-row input::placeholder {
        color: rgba(138, 118, 195, 0.35);
      }

      .err-msg {
        display: block;
        font-size: 11px;
        color: #ff7777;
        min-height: 18px;
        margin-bottom: 4px;
      }

      /* ── Keychain button ── */
      .btn-kc {
        width: 100%;
        padding: 14px 22px;
        margin-top: 4px;
        background: linear-gradient(135deg, #1565e0, #0d4db8);
        border: 1.5px solid rgba(70, 130, 255, 0.48);
        border-radius: 12px;
        color: #fff;
        font-family:
          Inter,
          Segoe UI,
          Arial,
          sans-serif;
        font-size: 14px;
        font-weight: 700;
        letter-spacing: 0.4px;
        cursor: pointer;
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 9px;
        transition: all 0.18s;
        position: relative;
        overflow: hidden;
      }
      .btn-kc:hover {
        background: linear-gradient(135deg, #2278f0, #1560d4);
        box-shadow: 0 8px 30px rgba(25, 100, 240, 0.42);
        transform: translateY(-2px);
      }
      .btn-kc:active {
        transform: translateY(0);
        box-shadow: none;
      }
      .btn-kc::after {
        content: "";
        position: absolute;
        inset: 0;
        background: linear-gradient(
          90deg,
          transparent,
          rgba(255, 255, 255, 0.11),
          transparent
        );
        transform: translateX(-100%);
        animation: kc-shim 3.2s ease-in-out infinite;
      }
      @keyframes kc-shim {
        0% {
          transform: translateX(-100%);
        }
        50%,
        100% {
          transform: translateX(150%);
        }
      }
      .kc-ico {
        font-size: 18px;
      }

      .kc-warn {
        display: none;
        margin-top: 10px;
        padding: 9px 14px;
        background: rgba(255, 140, 28, 0.08);
        border: 1px solid rgba(255, 140, 28, 0.22);
        border-radius: 9px;
        font-size: 10.5px;
        color: rgba(255, 178, 78, 0.82);
        text-align: center;
        line-height: 1.5;
      }
      .kc-warn.show {
        display: block;
      }
      .kc-warn a {
        color: #ffaa44;
      }

      /* ── Divider ── */
      .or-div {
        display: flex;
        align-items: center;
        gap: 10px;
        margin: 20px 0 16px;
      }
      .or-div::before,
      .or-div::after {
        content: "";
        flex: 1;
        height: 1px;
        background: rgba(140, 100, 225, 0.2);
      }
      .or-div span {
        font-size: 10px;
        color: rgba(138, 108, 205, 0.45);
        text-transform: uppercase;
        letter-spacing: 1.5px;
      }

      /* ── Guest button ── */
      .btn-guest {
        width: 100%;
        padding: 12px 22px;
        background: rgba(255, 255, 255, 0.03);
        border: 1.5px solid rgba(140, 108, 205, 0.22);
        border-radius: 12px;
        color: rgba(188, 168, 232, 0.64);
        font-family:
          Inter,
          Segoe UI,
          Arial,
          sans-serif;
        font-size: 13px;
        font-weight: 600;
        cursor: pointer;
        transition: all 0.18s;
      }
      .btn-guest:hover {
        background: rgba(170, 128, 255, 0.1);
        border-color: rgba(170, 128, 255, 0.38);
        color: rgba(215, 195, 255, 0.88);
      }
      .guest-note {
        text-align: center;
        font-size: 10px;
        color: rgba(128, 108, 178, 0.4);
        font-style: italic;
        margin-top: 7px;
      }

      /* ── Footer ── */
      .card-foot {
        margin-top: 28px;
        padding-top: 18px;
        border-top: 1px solid rgba(140, 100, 225, 0.13);
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 8px;
      }
      .card-foot a {
        font-size: 11px;
        color: rgba(130, 150, 215, 0.5);
        text-decoration: none;
        transition: color 0.15s;
      }
      .card-foot a:hover {
        color: rgba(175, 195, 255, 0.82);
        text-decoration: underline;
      }
      @media (max-width: 480px) {
        .card {
          padding: 32px 22px 28px;
        }
        .logo-name {
          font-size: 21px;
          letter-spacing: 2px;
        }
      }