/*
============================================================
 HOKAGE SAGA — SIGN IN UI
 File giao diện riêng, không thay đổi PHP / HTML / AJAX.
 Load file này SAU CSS hiện tại của sign-in.php.

 Phong cách:
 - Nền anime tối, shadow sâu
 - Đốm lửa nhỏ bay lên
 - Login box gần như trong suốt
 - Glass / liquid glass
 - Vòng sáng mềm quanh khung
 - Highlight như ánh sáng phản chiếu trên nước
============================================================
*/

/* ----------------------------------------------------------
   GLOBAL / BACKGROUND
---------------------------------------------------------- */

html,
body{
  min-height:100%;
}

body{
  position:relative;
  overflow-x:hidden;
  background:#03050a !important;
}

/* Làm nền video tối hơn, nhưng vẫn giữ nhân vật */
.bg-video{
  filter:
    saturate(108%)
    contrast(108%)
    brightness(58%)
    !important;
}

/* Lớp shadow đen phủ nền */
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;

  background:
    radial-gradient(
      ellipse at 50% 42%,
      rgba(0,0,0,.05) 0%,
      rgba(0,0,0,.28) 48%,
      rgba(0,0,0,.72) 100%
    ),
    linear-gradient(
      180deg,
      rgba(0,0,0,.32) 0%,
      rgba(0,0,0,.18) 35%,
      rgba(0,0,0,.72) 100%
    );
}

/* ----------------------------------------------------------
   FIRE PARTICLES
   Các đốm sáng nhỏ bay từ dưới lên.
---------------------------------------------------------- */

.scene{
  position:fixed;
  inset:0;
  z-index:1;
  pointer-events:none;
  overflow:hidden;
}

/* Một "đám" particle gồm nhiều điểm bằng box-shadow */
.scene::before{
  content:"";
  position:absolute;
  left:8%;
  bottom:-20px;

  width:3px;
  height:3px;
  border-radius:50%;

  background:rgba(255,205,85,.9);

  box-shadow:
    45px -40px 0 0 rgba(255,157,54,.65),
    110px -130px 0 0 rgba(255,221,110,.8),
    185px -70px 0 0 rgba(255,111,48,.55),
    250px -210px 0 0 rgba(255,215,105,.72),
    325px -95px 0 0 rgba(255,142,48,.6),
    405px -270px 0 0 rgba(255,226,133,.72),
    490px -150px 0 0 rgba(255,116,43,.55),
    580px -350px 0 0 rgba(255,216,104,.72),
    675px -190px 0 0 rgba(255,145,55,.6),
    760px -290px 0 0 rgba(255,224,128,.72),
    850px -100px 0 0 rgba(255,154,59,.58),
    940px -370px 0 0 rgba(255,219,110,.7),
    1030px -240px 0 0 rgba(255,129,43,.58),
    1120px -320px 0 0 rgba(255,226,142,.72),
    1210px -120px 0 0 rgba(255,153,48,.55),
    1300px -280px 0 0 rgba(255,215,100,.7),
    1390px -180px 0 0 rgba(255,128,40,.5);

  filter:blur(.2px) drop-shadow(0 0 5px rgba(255,166,53,.55));

  animation:
    signFireRise 11s linear infinite,
    signFireDrift 4.5s ease-in-out infinite;
}

/* Particle thứ hai chạy lệch nhịp */
.scene::after{
  content:"";
  position:absolute;
  right:7%;
  bottom:-30px;

  width:2px;
  height:2px;
  border-radius:50%;

  background:rgba(255,229,143,.85);

  box-shadow:
    -80px -100px 0 0 rgba(255,142,48,.6),
    -170px -250px 0 0 rgba(255,219,108,.7),
    -280px -160px 0 0 rgba(255,110,38,.55),
    -370px -330px 0 0 rgba(255,225,135,.72),
    -470px -220px 0 0 rgba(255,145,48,.52),
    -570px -410px 0 0 rgba(255,221,111,.68),
    -690px -130px 0 0 rgba(255,157,56,.5),
    -790px -300px 0 0 rgba(255,230,145,.7);

  filter:drop-shadow(0 0 5px rgba(255,173,57,.55));

  animation:
    signFireRise2 14s linear infinite,
    signFireDrift2 5s ease-in-out infinite;
}

/* ----------------------------------------------------------
   MAIN
---------------------------------------------------------- */

#main-container{
  position:relative;
  z-index:5;
  min-height:100vh;
  padding:40px 18px;
}

/* ----------------------------------------------------------
   LOGIN BOX — LIQUID GLASS
---------------------------------------------------------- */

.login-box{
  position:relative;
  isolation:isolate;
  overflow:hidden;

  max-width:380px !important;
  width:min(92vw,380px) !important;

  padding:34px 28px 28px !important;
  border-radius:28px !important;

  /*
   Gần như trong suốt:
   nền chỉ đủ để tách khỏi background.
  */
  background:
    linear-gradient(
      145deg,
      rgba(255,255,255,.075),
      rgba(255,255,255,.018) 38%,
      rgba(5,9,18,.42) 100%
    ) !important;

  border:1px solid rgba(255,255,255,.12);

  box-shadow:
    0 30px 90px rgba(0,0,0,.68),
    0 10px 35px rgba(0,0,0,.42),
    0 0 55px rgba(255,169,36,.06),
    inset 0 1px 0 rgba(255,255,255,.16),
    inset 0 -1px 0 rgba(255,255,255,.025);

  backdrop-filter:
    blur(20px)
    saturate(135%);
  -webkit-backdrop-filter:
    blur(20px)
    saturate(135%);

  animation:loginFloat 6s ease-in-out infinite;
}

/* Vòng sáng chạy quanh login-box */
.login-box::before{
  content:"";
  position:absolute;
  inset:0;
  z-index:20;
  pointer-events:none;

  padding:1px;
  border-radius:inherit;

  background:
    conic-gradient(
      from 0deg,
      transparent 0deg,
      transparent 270deg,
      rgba(255,174,45,.04) 294deg,
      rgba(255,188,70,.38) 315deg,
      rgba(255,231,160,.98) 337deg,
      rgba(255,160,35,.20) 352deg,
      transparent 360deg
    );

  -webkit-mask:
    linear-gradient(#000 0 0) content-box,
    linear-gradient(#000 0 0);
  -webkit-mask-composite:xor;

  mask:
    linear-gradient(#000 0 0) content-box,
    linear-gradient(#000 0 0);
  mask-composite:exclude;

  filter:
    drop-shadow(0 0 6px rgba(255,177,45,.48))
    drop-shadow(0 0 18px rgba(255,177,45,.10));

  animation:loginRing 5.8s linear infinite;
}

/* Ánh sáng phản chiếu như mặt nước */
.login-box::after{
  content:"";
  position:absolute;
  z-index:2;
  top:-65%;
  left:-70%;

  width:32%;
  height:230%;

  pointer-events:none;
  transform:rotate(19deg);

  background:
    linear-gradient(
      90deg,
      transparent,
      rgba(255,255,255,.025) 20%,
      rgba(255,255,255,.16) 50%,
      rgba(255,255,255,.025) 80%,
      transparent
    );

  filter:blur(5px);
  opacity:0;

  animation:liquidShine 9s ease-in-out infinite;
}

/* ----------------------------------------------------------
   TITLE
---------------------------------------------------------- */

.login-box h1{
  position:relative;
  z-index:5;

  margin:0 0 5px !important;

  font-size:13px !important;
  font-weight:700 !important;
  letter-spacing:3px;

  color:rgba(235,241,255,.70) !important;
  text-transform:uppercase;

  text-shadow:
    0 2px 12px rgba(0,0,0,.75);
}

.login-box h2{
  position:relative;
  z-index:5;

  margin:0 0 28px !important;

  font-size:27px !important;
  font-weight:800 !important;

  color:#ffe08a !important;

  text-shadow:
    0 0 8px rgba(255,194,62,.25),
    0 4px 18px rgba(0,0,0,.7);
}

/* ----------------------------------------------------------
   FORM LABEL
---------------------------------------------------------- */

.form-label{
  color:rgba(220,228,242,.72) !important;
  font-size:12px !important;
  font-weight:700 !important;
  letter-spacing:1px;
  text-transform:uppercase;

  text-shadow:0 2px 8px rgba(0,0,0,.6);
}

/* ----------------------------------------------------------
   INPUT — LIQUID GLASS
---------------------------------------------------------- */

.form-control{
  position:relative;
  z-index:5;

  height:45px;
  padding:11px 14px !important;

  color:#f4f7ff !important;

  background:
    linear-gradient(
      145deg,
      rgba(255,255,255,.075),
      rgba(255,255,255,.025)
    ) !important;

  border:1px solid rgba(255,255,255,.10) !important;
  border-radius:13px !important;

  box-shadow:
    inset 0 1px 0 rgba(255,255,255,.075),
    inset 0 -5px 15px rgba(0,0,0,.12),
    0 8px 22px rgba(0,0,0,.16);

  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);

  transition:
    border-color .3s ease,
    box-shadow .3s ease,
    background .3s ease,
    transform .3s ease;
}

.form-control::placeholder{
  color:rgba(205,214,229,.42) !important;
}

.form-control:focus{
  outline:none !important;
  transform:translateY(-1px);

  background:
    linear-gradient(
      145deg,
      rgba(255,255,255,.105),
      rgba(255,255,255,.025)
    ) !important;

  border-color:rgba(255,206,92,.48) !important;

  box-shadow:
    0 0 0 3px rgba(255,194,62,.055),
    0 0 22px rgba(255,178,45,.12),
    inset 0 1px 0 rgba(255,255,255,.12);
}

/* Password group */
.input-group{
  position:relative;
}

.input-group .form-control{
  margin-right:0 !important;
  padding-right:48px !important;
}

.input-group-append{
  position:absolute;
  z-index:10;
  right:5px;
  top:4px;
  height:37px;
}

.input-group-append button{
  width:38px;
  height:37px;

  display:grid;
  place-items:center;

  padding:0 !important;

  color:rgba(225,233,247,.62) !important;
  border-radius:10px !important;

  transition:
    color .25s ease,
    background .25s ease,
    transform .25s ease;
}

.input-group-append button:hover{
  color:#ffd76a !important;
  background:rgba(255,255,255,.06);
  transform:scale(1.04);
}

/* ----------------------------------------------------------
   FORM FOOTER
---------------------------------------------------------- */

.form-footer{
  position:relative;
  z-index:5;

  color:rgba(211,220,236,.62) !important;
}

.form-footer input[type="checkbox"]{
  accent-color:#ffc83d;
}

.form-footer a{
  color:#ffd76a !important;
  transition:color .25s ease, text-shadow .25s ease;
}

.form-footer a:hover{
  color:#fff0b4 !important;
  text-decoration:none !important;
  text-shadow:0 0 10px rgba(255,215,106,.45);
}

/* ----------------------------------------------------------
   LOGIN BUTTON — MỀM / LUNG LINH
---------------------------------------------------------- */

.btn-login{
  position:relative;
  z-index:5;

  overflow:hidden;

  min-height:47px;
  border-radius:14px !important;

  color:#201400 !important;

  background:
    linear-gradient(
      135deg,
      #ffe18a 0%,
      #ffc72e 45%,
      #e99a08 100%
    ) !important;

  border:1px solid rgba(255,240,177,.58) !important;

  box-shadow:
    0 12px 28px rgba(0,0,0,.28),
    0 7px 22px rgba(255,178,35,.20),
    inset 0 1px 0 rgba(255,255,255,.65),
    inset 0 -5px 14px rgba(159,91,0,.12);

  transition:
    transform .3s cubic-bezier(.2,.8,.2,1),
    box-shadow .3s ease,
    filter .3s ease;
}

/* Shine trên nút */
.btn-login::before{
  content:"";
  position:absolute;
  top:-80%;
  left:-70%;

  width:30%;
  height:260%;

  transform:rotate(20deg);

  background:
    linear-gradient(
      90deg,
      transparent,
      rgba(255,255,255,.68),
      transparent
    );

  filter:blur(4px);
  opacity:0;
}

.btn-login:hover{
  transform:translateY(-2px) !important;

  filter:saturate(110%);

  box-shadow:
    0 16px 34px rgba(0,0,0,.34),
    0 8px 28px rgba(255,178,35,.30),
    inset 0 1px 0 rgba(255,255,255,.75) !important;
}

.btn-login:hover::before{
  animation:buttonShine .8s ease-out;
}

.btn-login:active{
  transform:translateY(0) scale(.985) !important;
}

/* ----------------------------------------------------------
   RESPONSIVE
---------------------------------------------------------- */

@media (max-width:600px){
  #main-container{
    padding:22px 14px;
  }

  .login-box{
    width:min(94vw,380px) !important;
    padding:29px 21px 23px !important;
    border-radius:24px !important;
  }

  .login-box h2{
    font-size:24px !important;
  }
}

/* ----------------------------------------------------------
   ANIMATIONS
---------------------------------------------------------- */

@keyframes loginFloat{
  0%,100%{
    transform:translate3d(0,0,0);
  }

  50%{
    transform:translate3d(0,-3px,0);
  }
}

@keyframes loginRing{
  from{
    transform:rotate(0deg);
  }

  to{
    transform:rotate(360deg);
  }
}

@keyframes liquidShine{
  0%,55%{
    left:-70%;
    opacity:0;
  }

  68%{
    opacity:.42;
  }

  82%{
    left:125%;
    opacity:0;
  }

  100%{
    left:125%;
    opacity:0;
  }
}

@keyframes buttonShine{
  0%{
    left:-70%;
    opacity:0;
  }

  25%{
    opacity:.65;
  }

  100%{
    left:130%;
    opacity:0;
  }
}

/* Particle bay lên + mờ dần */
@keyframes signFireRise{
  0%{
    transform:translate3d(0,40px,0) scale(.7);
    opacity:0;
  }

  10%{
    opacity:.8;
  }

  55%{
    opacity:.65;
  }

  100%{
    transform:translate3d(18px,-105vh,0) scale(1.1);
    opacity:0;
  }
}

@keyframes signFireRise2{
  0%{
    transform:translate3d(0,30px,0) scale(.6);
    opacity:0;
  }

  12%{
    opacity:.75;
  }

  60%{
    opacity:.55;
  }

  100%{
    transform:translate3d(-25px,-110vh,0) scale(1.15);
    opacity:0;
  }
}

@keyframes signFireDrift{
  0%,100%{
    margin-left:0;
  }

  50%{
    margin-left:18px;
  }
}

@keyframes signFireDrift2{
  0%,100%{
    margin-right:0;
  }

  50%{
    margin-right:22px;
  }
}

/* Tôn trọng reduced motion */
@media (prefers-reduced-motion:reduce){
  .login-box,
  .login-box::before,
  .login-box::after,
  .scene::before,
  .scene::after,
  .btn-login::before{
    animation:none !important;
  }

  .btn-login,
  .form-control{
    transition:none !important;
  }
}