* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: "Segoe UI", sans-serif;
}

:root {
  --bg: #05050b;
  --card: rgba(20, 20, 31, 0.95);
  --input: #0b0b14;
  --text: #f5f5fb;
  --muted: #a9a9b8;
  --border: rgba(255, 255, 255, 0.08);
  --purple: #8b3dff;
  --purple-2: #b06cff;
  --link: #9f63ff;
  --success: #12d18e;
  --danger: #ff5f7a;
}

body {
  min-height: 100vh;
  background:
    linear-gradient(
      90deg,
      rgba(100, 40, 180, 0.18) 0%,
      rgba(0, 0, 0, 0) 18%,
      rgba(0, 0, 0, 0) 82%,
      rgba(100, 40, 180, 0.18) 100%
    ),
    var(--bg);
  color: var(--text);
  position: relative;
  overflow-x: hidden;
  transition: opacity 0.6s ease, transform 0.6s ease;
}

body.fade-out {
  opacity: 0;
  transform: scale(0.98);
}

.container {
  width: 100%;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.form-box {
  width: 100%;
  max-width: 500px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 28px;
  padding: 34px;
  box-shadow:
    0 0 30px rgba(139, 61, 255, 0.12),
    0 14px 50px rgba(0, 0, 0, 0.45);
  transition: transform 0.4s ease, opacity 0.4s ease;
}

body.fade-out .form-box {
  transform: translateY(-20px);
  opacity: 0;
}

#register-form {
  display: none;
}

.form-box form {
  width: 100%;
}

.form-box h2 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text);
}

.form-box input[type="email"],
.form-box input[type="password"],
.form-box input[type="text"] {
  width: 100%;
  height: 50px;
  background: var(--input);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 16px;
  color: var(--text);
  font-size: 1rem;
  padding: 0 18px;
  margin-bottom: 14px;
  outline: none;
  transition: 0.2s ease;
}

.form-box input::placeholder {
  color: #7d7d8e;
}

.form-box input:focus {
  border-color: #a56cff;
  box-shadow: 0 0 0 3px rgba(165, 108, 255, 0.18);
}

.remember-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 4px 0 16px;
  color: var(--muted);
  font-size: 0.95rem;
  user-select: none;
}

.remember-row input[type="checkbox"] {
  width: 16px;
  height: 16px;
  margin: 0;
  accent-color: var(--purple);
}

.form-box button {
  width: 100%;
  height: 48px;
  border: none;
  border-radius: 16px;
  background: linear-gradient(90deg, var(--purple), var(--purple-2));
  color: white;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  margin-top: 4px;
  transition: 0.2s ease;
}

.form-box button:hover {
  opacity: 0.96;
  transform: translateY(-1px);
}

.form-box button:disabled {
  opacity: 0.7;
  cursor: not-allowed;
  transform: none;
}

.form-box p {
  margin-top: 18px;
  text-align: center;
  font-size: 1rem;
  color: var(--muted);
}

.form-box a {
  color: var(--link);
  text-decoration: none;
  font-weight: 600;
}

.form-box a:hover {
  text-decoration: underline;
}

.message-box {
  margin-bottom: 14px;
  padding: 14px 16px;
  border-radius: 14px;
  font-size: 0.95rem;
  display: none;
}

.message-box.show {
  display: block;
}

.message-box.success {
  background: rgba(18, 209, 142, 0.12);
  border: 1px solid rgba(18, 209, 142, 0.35);
  color: #b5ffe4;
}

.message-box.error {
  background: rgba(255, 95, 122, 0.12);
  border: 1px solid rgba(255, 95, 122, 0.35);
  color: #ffd0d8;
}

@media (max-width: 600px) {
  .container {
    padding: 16px;
  }

  .form-box {
    max-width: 100%;
    padding: 24px 20px;
    border-radius: 22px;
  }

  .form-box h2 {
    font-size: 1.7rem;
  }

  .form-box input[type="email"],
  .form-box input[type="password"],
  .form-box input[type="text"],
  .form-box button {
    height: 46px;
  }
}