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

html {
  height: 100%;
  overflow-y: auto;
  overflow-x: hidden;
}

body {
  min-height: 100vh;
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  padding: 40px 20px;
  color: #e2e8f0;
}

.container {
  width: 100%;
  max-width: 480px;
  margin: 0 auto;
  background: #1e293b;
  padding: 40px;
  border-radius: 16px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  border: 1px solid rgba(148, 163, 184, 0.1);
}

h1 {
  font-size: 26px;
  font-weight: 600;
  color: #f1f5f9;
  text-align: center;
  margin-bottom: 32px;
  background: linear-gradient(135deg, #6366f1, #8b5cf6);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.form-group {
  margin-bottom: 24px;
}

label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: #cbd5e1;
  margin-bottom: 8px;
}

input[type="email"],
input[type="password"] {
  width: 100%;
  padding: 12px 16px;
  font-size: 15px;
  border: 1px solid #334155;
  border-radius: 8px;
  background-color: #0f172a;
  color: #e2e8f0;
  transition: all 0.2s ease;
  font-family: inherit;
}

input[type="email"]::placeholder,
input[type="password"]::placeholder {
  color: #64748b;
}

input[type="email"]:focus,
input[type="password"]:focus {
  outline: none;
  border-color: #6366f1;
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

input.valid {
  border-color: #10b981;
  background-color: rgba(16, 185, 129, 0.05);
}

input.invalid {
  border-color: #ef4444;
  background-color: rgba(239, 68, 68, 0.05);
}

.error-message,
.success-message,
#emptyPass,
#emptyMail {
  display: none;
  font-size: 13px;
  margin-top: 8px;
  padding: 8px 12px;
  border-radius: 6px;
}

#emptyPass,
#emptyMail {
  color: #fbbf24;
  background-color: rgba(251, 191, 36, 0.1);
  border-left: 3px solid #fbbf24;
}

.error-message {
  color: #fca5a5;
  background-color: rgba(239, 68, 68, 0.1);
  border-left: 3px solid #ef4444;
}

.success-message {
  color: #6ee7b7;
  background-color: rgba(16, 185, 129, 0.1);
  border-left: 3px solid #10b981;
}

.error-message.show,
.success-message.show {
  display: block;
}

.requirements {
  margin-top: 12px;
  padding: 16px;
  background-color: rgba(15, 23, 42, 0.8);
  border-radius: 8px;
  border: 1px solid #334155;
  display: none;
}

.requirements.show {
  display: block;
}

.req-title {
  font-size: 13px;
  font-weight: 600;
  color: #94a3b8;
  margin-bottom: 10px;
}

.requirements ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.requirements li {
  font-size: 13px;
  padding: 5px 0;
  color: #94a3b8;
  transition: color 0.2s ease;
}

.requirements li .icon {
  display: inline-block;
  width: 16px;
  height: 16px;
  line-height: 16px;
  text-align: center;
  border-radius: 50%;
  margin-right: 8px;
  font-size: 10px;
  font-weight: bold;
}

.requirements li.invalid .icon {
  background-color: rgba(239, 68, 68, 0.2);
  color: #ef4444;
}

.requirements li.valid {
  color: #10b981;
}

.requirements li.valid .icon {
  background-color: rgba(16, 185, 129, 0.2);
  color: #10b981;
}

.requirements li.valid .icon::before {
  content: "✓";
}

.submit-btn {
  width: 100%;
  padding: 14px;
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  background: linear-gradient(135deg, #6366f1, #8b5cf6);
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s ease;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-top: 8px;
}

.submit-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
}

.submit-btn:active {
  transform: translateY(0);
}

.submit-btn:disabled {
  background: #475569;
  cursor: not-allowed;
  opacity: 0.6;
}

.success {
  display: none;
  text-align: center;
  margin-top: 16px;
  font-size: 15px;
  font-weight: 600;
  color: #10b981;
}

/* Simple custom scrollbar */
::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-track {
  background: #0f172a;
}

::-webkit-scrollbar-thumb {
  background: #334155;
  border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
  background: #475569;
}

/* Mobile */
@media (max-width: 480px) {
  body {
    padding: 20px 16px;
  }

  .container {
    padding: 32px 24px;
  }

  h1 {
    font-size: 22px;
  }

  input[type="email"],
  input[type="password"] {
    font-size: 16px;
  }
}