* {
  box-sizing: border-box;
}
body, html {
  margin: 0; padding: 0; height: 100%;
  font-family: 'Roboto', sans-serif;
  background: #fff;
  display: flex;
  justify-content: center;
  align-items: center;
}

.container {
  position: relative;
  width: 900px;
  height: 580px;
  border-radius: 15px;
  overflow: hidden;
  box-shadow: 0 0 32px rgba(0, 0, 0, 0.15);
  background: #fff;
  display: flex;
  flex-direction: row;
}


.welcome {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: #fff;
  z-index: 6;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 0 40px;
  text-align: center;
  transition: left 0.8s cubic-bezier(.68,-0.55,.27,1.55);
}
.welcome.hide { left: -100%; }
.welcome h1 {
  font-size: 2.7rem;
  color: #004d4d;
  font-weight: 900;
  letter-spacing: 1.5px;
  margin-bottom: 10px;
  text-shadow: 0 2px 18px #3aaaaf30;
}
.welcome p {
  font-size: 1.5rem;
  font-weight: 700;
  color: #1e4251;
  margin-bottom: 40px;
  letter-spacing: 1px;
}
.btn {
  width: 240px;
  padding: 14px 0;
  border-radius: 15px;
  font-size: 1.1rem;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 6px 18px rgba(0, 77, 77, 0.07);
  border: none;
  margin: 8px 0;
  transition: background 0.25s;
}
.btn.login {
  background: linear-gradient(90deg,#3aaaaf 0%, #004d4d 100%);
  color: white;
}
.btn.login:hover { background: #3aaaaf; }
.btn.guest {
  background: linear-gradient(90deg,#fed6e3 0%, #3aaaaf 100%);
  color: #004d4d;
}
.btn.guest:hover { background: #004d4d; color: white; }


.panel {
  flex: 1;
  padding: 40px 30px 20px 30px;
  background: #fff;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  transition: opacity 0.7s cubic-bezier(.68,-0.55,.27,1.55);
  z-index: 2;
  position: relative;
}
.panel.left { border-right: 1px solid #ddd; }
.form-title {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 28px;
  color: #222;
}
.form-group { margin-bottom: 16px; }
label {
  font-size: 0.95rem;
  margin-bottom: 6px;
  color: #555;
  display: block;
}
input {
  width: 100%;
  padding: 11px 12px;
  border-radius: 5px;
  border: 1px solid #ccc;
  font-size: 1rem;
  outline: none;
  background: #fff;
}
button.btn.form-btn {
  margin-top: 14px;
  padding: 12px 0;
  border-radius: 6px;
  background: #3aaaaf;
  border: none;
  font-weight: 600;
  color: #fff;
  font-size: 1.1rem;
  cursor: pointer;
  transition: background 0.3s ease;
}
button.btn.form-btn:hover { background: #00796b; }


.back-btn-overlay {
  position: absolute;
  bottom: 25px;
  font-size: 0.85rem;
  padding: 8px 18px;
  border-radius: 14px;
  background: linear-gradient(90deg,#fed6e3 0%,#3aaaaf 100%);
  color: #004d4d;
  font-weight: 700;
  border: none;
  box-shadow: 0 4px 12px #004d4d22;
  transition: background 0.3s;
  cursor: pointer;
}
.back-btn-overlay:hover { background: #3aaaaf; color: #fff; }


.overlay {
  position: absolute;
  top: 0;
  left: 50%;
  width: 50%;
  height: 100%;
  background: #004d4d;
  color: #fff;
  border-radius: 0 15px 15px 0;
  box-shadow: -8px 0 24px rgba(0, 0, 0, 0.15);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 40px 30px;
  font-size: 2.4rem;
  font-weight: 700;
  transition: left 0.7s cubic-bezier(.68, -0.55, .27, 1.55);
  z-index: 5;
}
.overlay-content {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  flex: 1;
}
.arrow-btn {
  margin-top: 48px;
  background: none;
  border: none;
  cursor: pointer;
  width: 58px;
  height: 58px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 2px 10px rgba(0, 77, 77, 0.2);
  transition: background 0.3s;
}
.arrow-btn:hover {
  background: #ccebe5;
  box-shadow: 0 2px 18px rgba(58, 170, 175, 0.5);
}
.arrow-btn svg {
  width: 32px;
  height: 32px;

  fill: #004d4d;
  display: block;
}



.container.show-create .overlay {
  left: 0;
  border-radius: 15px 0 0 15px;
}
.container.show-create .panel.left {
  transform: translateX(-50%);
  opacity: 0.15;
  pointer-events: none;
  z-index: 1;
}
.container.show-create .panel.right { z-index: 3; }