/*
 * ImmersiveClub — оформление страниц авторизации (вход, регистрация, восстановление пароля, заявка, 2FA).
 * Подключается поверх штатного resources/sass/pages/_auth.scss через nginx (sub_filter перед </head>).
 * Стили действуют только на страницах с .auth-form, на остальной сайт не влияют.
 * Откат: убрать строку sub_filter '</head>' из /etc/nginx/sites-available/default и выполнить systemctl reload nginx.
 */

/* Фон: тёмно-синий, бледный узор наушников и мерцающие звёзды */
body:has(.auth-form) {
    background-color: #161a26;
    background-image:
        radial-gradient(1px 1px at 22px 118px, #c9d4f0, transparent),
        radial-gradient(1px 1px at 141px 33px, #c9d4f0, transparent),
        radial-gradient(1px 1px at 208px 247px, #b8c6ea, transparent),
        radial-gradient(1px 1px at 286px 172px, #c9d4f0, transparent),
        radial-gradient(1px 1px at 353px 401px, #b8c6ea, transparent),
        radial-gradient(1px 1px at 419px 96px, #c9d4f0, transparent),
        radial-gradient(1px 1px at 58px 331px, #b8c6ea, transparent),
        radial-gradient(1px 1px at 172px 452px, #c9d4f0, transparent),
        radial-gradient(1px 1px at 447px 299px, #b8c6ea, transparent),
        radial-gradient(1px 1px at 311px 18px, #c9d4f0, transparent),
        url('/img/immersive-pattern-auth.svg?v=1');
    background-repeat: repeat;
    background-size:
        470px 490px, 470px 490px, 470px 490px, 470px 490px, 470px 490px,
        470px 490px, 470px 490px, 470px 490px, 470px 490px, 470px 490px,
        480px 480px;
    color: #cad2e2;
}

body:has(.auth-form)::before,
body:has(.auth-form)::after {
    content: '';
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    background-repeat: repeat;
}

body:has(.auth-form)::before {
    background-image:
        radial-gradient(1.5px 1.5px at 37px 52px, #ffffff, transparent),
        radial-gradient(1px 1px at 190px 140px, #dfe7ff, transparent),
        radial-gradient(1.5px 1.5px at 330px 40px, #ffffff, transparent),
        radial-gradient(1px 1px at 95px 290px, #cfdcff, transparent),
        radial-gradient(1.5px 1.5px at 260px 350px, #ffffff, transparent),
        radial-gradient(1px 1px at 410px 230px, #dfe7ff, transparent),
        radial-gradient(1px 1px at 470px 420px, #ffffff, transparent),
        radial-gradient(1.5px 1.5px at 120px 210px, #ffffff, transparent),
        radial-gradient(1px 1px at 300px 460px, #e6ecff, transparent),
        radial-gradient(2px 2px at 455px 75px, #ffffff, transparent),
        radial-gradient(1px 1px at 15px 440px, #dfe7ff, transparent),
        radial-gradient(1.5px 1.5px at 360px 175px, #ffffff, transparent);
    background-size: 520px 480px;
    animation: immersive-twinkle 5s ease-in-out infinite alternate;
}

body:has(.auth-form)::after {
    background-image:
        radial-gradient(1px 1px at 70px 180px, #ffffff, transparent),
        radial-gradient(1.5px 1.5px at 240px 90px, #e6ecff, transparent),
        radial-gradient(1px 1px at 380px 310px, #ffffff, transparent),
        radial-gradient(1.5px 1.5px at 150px 400px, #dfe7ff, transparent),
        radial-gradient(1px 1px at 520px 160px, #ffffff, transparent),
        radial-gradient(2px 2px at 30px 30px, #ffffff, transparent),
        radial-gradient(1px 1px at 460px 480px, #e6ecff, transparent),
        radial-gradient(1.5px 1.5px at 300px 210px, #ffffff, transparent),
        radial-gradient(1px 1px at 570px 400px, #dfe7ff, transparent);
    background-size: 610px 530px;
    animation: immersive-twinkle 7s ease-in-out 2s infinite alternate-reverse;
}

@keyframes immersive-twinkle {
    from {
        opacity: 0.25;
    }
    to {
        opacity: 0.9;
    }
}

@media (prefers-reduced-motion: reduce) {
    body:has(.auth-form) {
        background-image: url('/img/immersive-pattern.svg?v=6');
        background-size: 480px 480px;
    }

    body:has(.auth-form)::before,
    body:has(.auth-form)::after {
        animation: none;
        opacity: 0.6;
    }
}

body:has(.auth-form) > main {
    position: relative;
    z-index: 1;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px 0;
    box-sizing: border-box;
}

/* Карточка */
.auth-form {
    background-image: none;
    background-color: #1c2236;
    opacity: 1;
    width: min(100vw - 24px, 440px);
    margin: 0 auto;
    border: 1px solid #262f4a;
    border-radius: 10px;
    box-shadow:
        0 24px 60px rgba(0, 0, 0, 0.5),
        0 2px 6px rgba(0, 0, 0, 0.3);
    overflow: hidden;
}

.auth-form__form {
    padding: 44px 40px 32px;
    gap: 14px;
}

/* Логотип: сине-бирюзовый градиент и слоган */
.auth-form__branding {
    margin-bottom: 18px;
    row-gap: 8px;
}

.auth-form__branding > i {
    display: none;
}

.auth-form__site-logo {
    font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, Roboto, Helvetica, Arial, sans-serif;
    font-size: 2.6rem;
    font-weight: 800;
    letter-spacing: 0.02em;
    text-transform: none;
    color: #38bdf8;
    background-image:
        linear-gradient(110deg, transparent 42%, #c4b5fd 48%, #e9d5ff 50%, #c4b5fd 52%, transparent 58%),
        linear-gradient(90deg, #3b6cf6 0%, #38bdf8 50%, #2dd4bf 100%);
    background-size: 300% 100%, 100% 100%;
    background-repeat: no-repeat;
    background-position: 150% 0, 0 0;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: immersive-logo-shine 7s ease-in-out 1s infinite;
}

/* Сиреневый блик пробегает по названию слева направо, затем пауза */
@keyframes immersive-logo-shine {
    0% {
        background-position: 150% 0, 0 0;
    }
    57%,
    100% {
        background-position: -50% 0, 0 0;
    }
}

@media (prefers-reduced-motion: reduce) {
    .auth-form__site-logo {
        animation: none;
    }
}

.auth-form__branding::after {
    content: 'Where Sound Comes Alive';
    font-size: 1.05rem;
    font-weight: 500;
    letter-spacing: 0.02em;
    color: #8790ab;
}

/* Поля */
.auth-form__label,
.auth-form__legend {
    color: #9ba2b9;
    font-size: 14px;
    font-weight: 600;
}

.auth-form__text-input,
.auth-form__select,
.auth-form__textarea {
    background-color: #131825;
    color: #d4d9e6;
    border: 1px solid #2e395a;
    border-radius: 8px;
    height: 42px;
    transition:
        border-color 0.2s,
        box-shadow 0.2s;
}

.auth-form__textarea {
    height: 300px;
}

.auth-form input,
.auth-form select,
.auth-form textarea,
.auth-form button {
    font-family: inherit;
}

/* Поля, заполненные браузером автоматически, не перекрашиваются в светлый цвет */
.auth-form__text-input:-webkit-autofill,
.auth-form__text-input:-webkit-autofill:hover,
.auth-form__text-input:-webkit-autofill:focus {
    -webkit-text-fill-color: #d4d9e6;
    -webkit-box-shadow: 0 0 0 1000px #131825 inset;
    caret-color: #d4d9e6;
    transition: background-color 9999s ease-out 0s;
}

.auth-form__text-input:-webkit-autofill:focus {
    -webkit-box-shadow:
        0 0 0 1000px #131825 inset,
        0 0 0 3px rgba(56, 189, 248, 0.18);
}

.auth-form__text-input:focus,
.auth-form__select:focus,
.auth-form__textarea:focus {
    border-color: #38bdf8;
    box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.18);
}

.auth-form__checkbox-input {
    accent-color: #38bdf8;
}

.auth-form__fieldset {
    background-color: #182033;
    border: 1px solid #262f4a;
    box-shadow: none;
}

/* Кнопки */
.auth-form__primary-button {
    height: 46px;
    border-radius: 23px;
    background-color: #2c3654;
    color: #eaecf2;
    font-weight: 600;
    font-size: 16px;
    text-transform: none;
    margin-top: 18px;
}

.auth-form__primary-button:hover {
    background-color: #3a4770;
}

.auth-form__button--text {
    color: #9ba2b9;
    font-weight: 600;
    text-transform: none;
}

.auth-form__button--text:hover {
    background-color: #232b43;
    color: #d4d9e6;
}

/* Вкладки сверху (регистрация/заявка) и ссылки снизу */
.auth-form__header-item,
.auth-form__footer-item {
    color: #8790ab;
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 0.02em;
    text-transform: none;
    padding: 16px 12px;
}

.auth-form__header-item:hover,
.auth-form__footer-item:hover {
    background-color: #232b43;
    color: #d4d9e6;
}

.auth-form__footer {
    border-top: 1px solid #232b43;
}

.auth-form__footer-item:last-child,
.auth-form__header-item:first-child,
.auth-form__header-item:last-child {
    border-radius: 0;
}

/* Сообщения */
.auth-form__error {
    color: #f87171;
    font-weight: 600;
    font-size: 14px;
}

.auth-form__important-info {
    color: #93c5fd;
    font-weight: 600;
    font-size: 14px;
}

.auth-form a:focus-visible,
.auth-form button:focus-visible {
    outline: 2px solid #38bdf8;
    outline-offset: 2px;
}

/* Переключатель языка RU / EN в правом верхнем углу (разметку вставляет nginx перед </body>) */
.immersive-lang {
    position: fixed;
    top: 16px;
    right: 16px;
    z-index: 2;
    display: flex;
    padding: 3px;
    gap: 2px;
    background-color: rgba(28, 34, 54, 0.85);
    border: 1px solid #262f4a;
    border-radius: 999px;
    font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, Roboto, Helvetica, Arial, sans-serif;
}

.immersive-lang a {
    padding: 4px 12px;
    border-radius: 999px;
    color: #8790ab;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-decoration: none;
    transition:
        background-color 0.2s,
        color 0.2s;
}

.immersive-lang a:hover {
    color: #d4d9e6;
}

html[lang='ru'] .immersive-lang a[hreflang='ru'],
html[lang='en'] .immersive-lang a[hreflang='en'] {
    background-color: #2c3654;
    color: #eaecf2;
}

.immersive-lang a:focus-visible {
    outline: 2px solid #38bdf8;
    outline-offset: 2px;
}