html {
  box-sizing: border-box;
}

*,
*::before,
*::after {
  box-sizing: inherit;
}

.login {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 400px;
  min-width: 0;
  padding: clamp(1.5rem, 8vw, 4rem) max(1rem, env(safe-area-inset-right)) 1rem max(1rem, env(safe-area-inset-left));
  margin: auto;
}

.login img,
.login .logo-image {
  width: clamp(12rem, 62vw, 22rem);
  max-width: 100%;
  height: auto;
  display: block;
  margin: 0 auto 2rem auto;
  image-rendering: -webkit-optimize-contrast;
  image-rendering: crisp-edges;
  image-rendering: optimizeQuality;
  -webkit-backface-visibility: hidden;
  -webkit-transform: translateZ(0);
  transform: translateZ(0);
  will-change: transform;
  filter: drop-shadow(0 2px 8px rgba(44, 90, 160, 0.1));
  transition: all 0.3s ease;
  object-fit: contain;
}

.login img:hover,
.login .logo-image:hover {
  filter: drop-shadow(0 4px 12px rgba(44, 90, 160, 0.15));
  transform: translateZ(0) scale(1.02);
}

/* Для SVG файлов - улучшенное качество */
.login img[src$=".svg"],
.login .logo-image[src$=".svg"] {
  image-rendering: auto;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Логотип на мобильных — ограничение ширины */
@media (max-width: 576px) {
  .login img,
  .login .logo-image {
    width: clamp(10.25rem, 74vw, 16.25rem);
    max-width: 82vw;
    margin-left: auto;
    margin-right: auto;
  }
}

.form {
    position: relative;
    z-index: 1;
    background: linear-gradient(135deg, #ffffff 0%, #f8f9fa 100%);
    width: 100%;
    min-width: 0;
    max-width: 100%;
    margin: 0 auto;
    padding: clamp(1.25rem, 5vw, 2.5rem);
    text-align: center;
    border-radius: var(--ui-radius-lg);
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    border: 1px solid rgba(178, 218, 234, 0.3);
    transition: all 0.3s ease;
    overflow-wrap: anywhere;
    word-wrap: break-word;
  }

.form:hover {
    box-shadow: 0 6px 25px rgba(0,0,0,0.12);
  }

.form input {
    outline: 0;
    background: #ffffff;
    width: 100%;
    border: 2px solid rgba(178, 218, 234, 0.5);
    border-radius: var(--ui-radius-md);
    margin: 0 0 15px;
    padding: 15px;
    box-sizing: border-box;
    font-size: 14px;
    transition: all 0.3s ease;
    color: #2c3e50;
  }

.form input:focus {
    background: #ffffff;
    border-color: #2c5aa0;
    box-shadow: 0 0 0 0.2rem rgba(44, 90, 160, 0.25);
    outline: none;
  }

.form input:hover {
    border-color: rgba(178, 218, 234, 0.8);
  }

.form button {
    text-transform: uppercase;
    outline: 0;
    width: 100%;
    border: 0;
    padding: 15px;
    color: #FFFFFF;
    font-size: 14px;
    font-weight: 600;
    border-radius: var(--ui-radius-md);
    background: linear-gradient(135deg, #2c5aa0 0%, #1e3a8a 100%);
    -webkit-transition: all 0.3s ease;
    transition: all 0.3s ease;
    cursor: pointer;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
  }

.form button:hover,.form button:active,.form button:focus {
    background: linear-gradient(135deg, #1e3a8a 0%, #1a2f6b 100%);
    box-shadow: 0 4px 15px rgba(44, 90, 160, 0.3);
    transform: translateY(-2px);
  }

.form button:active {
    transform: translateY(0);
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
  }

.form .alternate {
    margin: 4%;
    font-size: 16px;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 0.75rem 1rem;
    clear: both;
  }

.form .alternate:has(> a:only-child) {
    justify-content: center;
  }
.form .alternate a {
    color: #2c5aa0;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
  }
.form .alternate a:hover {
    color: #1e3a8a;
    text-decoration: underline;
  }
.form .registration-form {
    display: none;
  }

body {
    position: relative;
    background: linear-gradient(135deg, #e3f2fd 0%, #b2daea 50%, #f0f8ff 100%);
    background-size: 400% 400%;
    animation: gradientShift 15s ease infinite;
    min-height: 100vh;
    overflow-x: hidden;
    max-width: 100vw;
  }

/* На широких экранах — мягкое «пятно» по центру, чтобы фон не выглядел пустым морем */
@media (min-width: 992px) {
  body::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    background:
      radial-gradient(ellipse min(85vw, 1200px) min(75vh, 900px) at 50% 42%,
        rgba(255, 255, 255, 0.55) 0%,
        rgba(240, 248, 255, 0.25) 45%,
        transparent 72%);
  }
}

@keyframes gradientShift {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

.lefttPosition {
  float: left;
}

.rightPosition {
  float: right;
}

* {
  font-family: Arial, Helvetica, sans-serif;
}

/* Адаптивность: вход, регистрация и связанные страницы (user/base.html) */
.form .login-form .form-group,
.form .login-form label {
  text-align: left;
}

.form .login-form {
  text-align: left;
}

.form > form:not(.login-form) {
  text-align: left;
}

.form > form:not(.login-form) button[type="submit"].btn {
  width: 100%;
  min-height: 44px;
  margin-top: 0.5rem;
}

.form .login-form > button.btn-dark,
.form .login-form button[type="submit"] {
  width: 100%;
  min-height: 44px;
  padding-top: 0.65rem;
  padding-bottom: 0.65rem;
}

.form .login-form .d-flex.flex-column .btn {
  width: 100%;
  min-height: 44px;
}

.form .form-control,
.form input:not([type="checkbox"]):not([type="radio"]) {
  max-width: 100%;
}

/* iOS: поля < 16px вызывают авто-зум при фокусе */
@media (max-width: 576px) {
  .form input:not([type="checkbox"]):not([type="radio"]),
  .form textarea,
  .form select,
  .form .form-control {
    font-size: 16px;
  }
}

@media (max-width: 576px) {
  .login {
    max-width: 100%;
  }

  .form .alternate {
    flex-direction: column;
    justify-content: center;
    text-align: center;
  }

  .form .alternate .lefttPosition,
  .form .alternate .rightPosition {
    float: none;
    width: 100%;
    display: block;
    padding: 0.35rem 0;
  }

  .lefttPosition,
  .rightPosition {
    float: none;
  }
}

@media (max-width: 380px) {
  .form {
    border-radius: 10px;
    padding: 1rem 0.875rem;
  }
}

/* Широкие мониторы: крупнее колонка, типографика и карточка — меньше «островка» посреди пустоты */
@media (min-width: 992px) {
  .login {
    max-width: 440px;
  }
}

@media (min-width: 1200px) {
  .login {
    max-width: 480px;
    padding-top: clamp(2rem, 5vh, 4.5rem);
  }

  .form {
    padding: 2.25rem 2rem;
    border-radius: var(--ui-radius-xl);
    box-shadow:
      0 4px 6px rgba(30, 58, 138, 0.04),
      0 12px 40px rgba(30, 64, 120, 0.12);
    border-color: rgba(178, 218, 234, 0.45);
  }

  .form input {
    font-size: 15px;
    padding: 16px 18px;
    margin-bottom: 16px;
  }

  .form button {
    font-size: 15px;
    padding: 16px 18px;
  }

  .form .alternate {
    font-size: 17px;
    margin-top: 1.25rem;
  }

  .login img,
  .login .logo-image {
    margin-bottom: 2.25rem;
  }

  .form .login-form .btn {
    font-size: 15px;
    padding: 16px 18px;
  }
}

@media (min-width: 1536px) {
  .login {
    max-width: 520px;
  }

  .form {
    padding: 2.5rem 2.35rem;
    border-radius: 18px;
  }

  .form input {
    font-size: 16px;
    padding: 17px 20px;
  }

  .form button {
    font-size: 16px;
    padding: 17px 20px;
  }

  .login img,
  .login .logo-image {
    width: clamp(16rem, 24vw, 25rem);
    max-width: min(100%, 25rem);
  }

  .form .login-form .btn {
    font-size: 16px;
    padding: 17px 20px;
  }
}

@media (min-width: 1920px) {
  .login {
    max-width: 560px;
  }

  .form {
    padding: 2.75rem 2.5rem;
  }
}

.login img,
.login .logo-image {
  filter: drop-shadow(0 2px 8px color-mix(in srgb, var(--ui-primary) 14%, transparent));
}

.login img:hover,
.login .logo-image:hover {
  filter: drop-shadow(0 4px 12px color-mix(in srgb, var(--ui-primary) 18%, transparent));
}

.form {
  background: linear-gradient(135deg, color-mix(in srgb, var(--ui-elevated-bg) 98%, transparent) 0%, color-mix(in srgb, var(--ui-primary) 4%, var(--ui-elevated-bg)) 100%);
  border: 1px solid var(--ui-border-subtle);
  box-shadow: var(--ui-shadow-elevated);
}

.form:hover {
  box-shadow: var(--ui-shadow-elevated);
}

.form input {
  background: var(--ui-surface-bg);
  border-color: var(--ui-border-subtle);
  color: var(--ui-text-primary);
}

.form input:focus {
  background: var(--ui-elevated-bg);
  border-color: var(--ui-primary);
  box-shadow: 0 0 0 0.2rem var(--ui-focus-ring);
}

.form input:hover {
  border-color: var(--ui-border-color);
}

.form button {
  color: var(--ui-text-inverse);
  background: linear-gradient(135deg, var(--ui-primary) 0%, var(--ui-primary-strong) 100%);
  box-shadow: var(--ui-shadow-elevated);
}

.form button:hover,
.form button:active,
.form button:focus {
  background: linear-gradient(135deg, var(--ui-primary-strong) 0%, color-mix(in srgb, var(--ui-primary-strong) 82%, var(--ui-primary)) 100%);
  box-shadow: var(--ui-shadow-elevated);
}

.form .alternate a {
  color: var(--ui-link-color);
}

.form .alternate a:hover {
  color: var(--ui-link-hover-color);
}

body {
  background: var(--ui-page-bg);
}

body::before {
  background:
    radial-gradient(ellipse min(85vw, 1200px) min(75vh, 900px) at 50% 42%,
      color-mix(in srgb, var(--ui-text-inverse) 48%, transparent) 0%,
      color-mix(in srgb, var(--ui-page-bg) 22%, transparent) 45%,
      transparent 72%);
}