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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: "Helvetica Neue", Arial, sans-serif;
  line-height: 1.5;
  background: #f4f7fb;
  color: #333;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background-image: url(../img/phone1.jpg);
}

:root {
  --clr-primary: #0066ff;
  --clr-primary-dark: #004bbb;
  --clr-success: #28a745;
  --clr-error: #dc3545;
  --clr-bg-card: #ffffff;
  --clr-bg-input: #fafafa;
  --clr-border: #e0e0e0;
  --radius: 8px;
  --shadow-card: 0 4px 12px rgba(0, 0, 0, 0.08);
  --transition: 0.25s ease;
}

.container {
  width: 100%;
  max-width: 480px;
  padding: 1rem;
}

.card {
  background: var(--clr-bg-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  padding: 2rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  justify-content: center;
  margin-bottom: 0.5rem;
}

.logo-icon {
  font-size: 2rem;
}

h1 {
  font-size: 1.4rem;
  font-weight: 600;
  margin: 0;
  color: var(--clr-primary-dark);
}

h2 {
  font-size: 1.2rem;
  font-weight: 500;
  text-align: center;
  color: #555;
}


form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.input-group {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.input-group label {
  font-size: 0.9rem;
  color: #555;
}

.input-group input {
  width: 100%;
  padding: 0.55rem 0.9rem;
  font-size: 0.95rem;
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  background: var(--clr-bg-input);
  transition: var(--transition);
}

.input-group input:focus {
  outline: none;
  border-color: var(--clr-primary);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(0, 102, 255, 0.1);
}

.password-group .password-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.toggle-password {
  position: absolute;
  right: 0.5rem;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
  line-height: 1;
  font-size: 1.1rem;
  color: #777;
  transition: var(--transition);
}

.toggle-password:hover {
  color: var(--clr-primary);
}

.password-wrapper input {
  padding-right: 2.5rem;
}


.error-message {
  min-height: 1.2rem;
  font-size: 0.85rem;
  color: var(--clr-error);
}


.btn {
  display: inline-block;
  width: 100%;
  padding: 0.75rem;
  font-size: 1rem;
  font-weight: 600;
  text-align: center;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
}

.btn-primary {
  background: var(--clr-primary);
  color: #fff;
}

.btn-primary:hover {
  background: var(--clr-primary-dark);
}


.footer-link {
  text-align: center;
  font-size: 0.9rem;
  color: #555;
}

.footer-link a {
  color: var(--clr-primary);
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition);
}

.footer-link a:hover {
  text-decoration: underline;
}


@keyframes slideUp {
  0% {
    opacity: 0;
    transform: translateY(30px);
  }

  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  0% {
    opacity: 0;
  }

  100% {
    opacity: 1;
  }
}

.animate-slideUp {
  animation: slideUp 0.6s var(--transition) forwards;
}

.animate-fadeIn {
  animation: fadeIn 0.6s var(--transition) forwards;
}


@media (max-width: 480px) {
  .card {
    padding: 1.5rem 1rem;
  }

  h1 {
    font-size: 1.2rem;
  }

  h2 {
    font-size: 1rem;
  }

  .logo-icon {
    font-size: 1.6rem;
  }
}


@media (prefers-color-scheme: dark) {
  :root {
    --clr-bg-card: #1e1e1e;
    --clr-bg-input: #2a2a2a;
    --clr-border: #444;
    --clr-primary: #3399ff;
    --clr-primary-dark: #2277dd;
    --clr-error: #ff6b6b;
  }

  body {
    background: #121212;
    color: #e0e0e0;
  }

  .error-message {
    color: var(--clr-error);
  }

  .footer-link,
  .footer-link a {
    color: #bbb;
  }
}

.back-link {
  margin-bottom: 0.5rem;
}
.btn-back {
  display: inline-block;
  background: transparent;
  border: none;
  color: var(--clr-primary);
  font-size: 0.95rem;
  cursor: pointer;
  text-decoration: none;
  transition: var(--transition);
}
.btn-back:hover {
  color: var(--clr-primary-dark);
}