/* ============================================================
   LOGIN — Nexa Admin (Redesign 2026)
   Использует дизайн-токены из common.css.
   ============================================================ */

/* Верхняя панель с переключателем языка */
.top-bar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    display: flex;
    justify-content: flex-end;
    padding: 24px 32px;
    z-index: 10;
}

/* Контейнер страницы */
.login-container {
    min-height: calc(100vh / 0.85);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    background-color: var(--bg-page);
    position: relative;
}

/* Едва заметный градиентный фон */
.login-container::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 20% 20%, var(--accent-tint) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, var(--bg-subtle) 0%, transparent 60%);
    pointer-events: none;
    z-index: 0;
}

/* Карточка формы */
.login-card {
    width: 100%;
    max-width: 440px;
    text-align: center;
    position: relative;
    z-index: 1;
}

/* Заголовок "Welcome to Nexa" */
.welcome-title {
    font-family: 'Inter', sans-serif;
    font-size: 52px;
    font-weight: 500;
    font-optical-sizing: auto;
    letter-spacing: -1.4px;
    color: var(--text-1);
    margin-bottom: 14px;
    line-height: 1.1;
    display: inline-block;
    position: relative;
    white-space: nowrap;
}

.welcome-title .typewriter-cursor {
    display: inline-block;
    width: 3px;
    height: 0.85em;
    background-color: var(--accent-1);
    margin-left: 4px;
    vertical-align: baseline;
    position: relative;
    top: 0.05em;
    animation: blink-cursor 0.75s step-end infinite;
}

@keyframes blink-cursor {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}

.subtitle {
    font-family: 'Inter', sans-serif;
    font-size: 16px;
    font-weight: 400;
    color: var(--text-3);
    margin-bottom: 44px;
}

/* Форма */
.login-form {
    display: flex;
    flex-direction: column;
    gap: 18px;
    text-align: left;
    background: var(--bg-card);
    padding: 28px;
    border-radius: var(--r-xl);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-md);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 7px;
}

.form-group label {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-2);
}

.form-group input {
    width: 100%;
    height: 48px;
    padding: 0 16px;
    font-size: 14.5px;
    font-family: inherit;
    color: var(--text-1);
    background-color: var(--bg-card);
    border: 1px solid var(--border-strong);
    border-radius: var(--r-md);
    transition: border-color var(--t-base), box-shadow var(--t-base);
    outline: none;
}

.form-group input::placeholder {
    color: var(--text-4);
}

.form-group input:hover {
    border-color: var(--text-3);
}

.form-group input:focus {
    border-color: var(--accent-2);
    box-shadow: var(--ring);
}

/* Кнопка "Войти" */
.submit-btn {
    width: 100%;
    height: 48px;
    margin-top: 8px;
    font-size: 14.5px;
    font-weight: 600;
    font-family: 'Inter', sans-serif;
    color: #ffffff;
    background-color: var(--accent-1);
    border: none;
    border-radius: var(--r-md);
    cursor: pointer;
    transition: background-color var(--t-base), transform var(--t-fast), box-shadow var(--t-base);
    box-shadow: var(--shadow-xs);
    letter-spacing: 0.01em;
}

.submit-btn:hover {
    background-color: var(--accent-2);
    box-shadow: var(--shadow-sm);
}

.submit-btn:active {
    transform: scale(0.99);
}

/* Сообщение об ошибке */
.login-error {
    font-size: 13px;
    color: var(--danger-text);
    background: var(--danger-bg);
    border: 1px solid var(--danger-border);
    border-radius: var(--r-sm);
    padding: 0 12px;
    text-align: center;
    opacity: 0;
    max-height: 0;
    overflow: hidden;
    transition: opacity var(--t-base), max-height var(--t-base), margin var(--t-base), padding var(--t-base);
}

.login-error.visible {
    opacity: 1;
    max-height: 60px;
    padding: 8px 12px;
    margin-top: 4px;
}

@media (max-width: 480px) {
    .top-bar {
        padding: 16px 20px;
    }

    .welcome-title {
        font-size: 40px;
    }

    .subtitle {
        font-size: 15px;
        margin-bottom: 32px;
    }

    .login-form {
        padding: 22px;
    }

    .form-group input,
    .submit-btn {
        height: 46px;
    }
}