:root {
    --bg: #020204;
    --accent: #0078d4;
    --glass: rgba(15, 15, 20, 0.9);
    --border: rgba(255, 255, 255, 0.08);
    --text: #ffffff;
    --text-dim: #88888b;
}

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

body {
    background-color: var(--bg);
    color: var(--text);
    font-family: 'Segoe UI', Roboto, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    overflow: hidden;
}

/* Эффекты фона */
.background-effects {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: radial-gradient(circle at 10% 10%, rgba(0, 120, 212, 0.1), transparent 40%),
                radial-gradient(circle at 90% 90%, rgba(106, 17, 203, 0.05), transparent 40%);
    z-index: -1;
}

/* Основная карточка */
.auth-card {
    background: var(--glass);
    backdrop-filter: blur(40px);
    border: 1px solid var(--border);
    border-radius: 24px;
    width: 440px;
    padding: 40px;
    box-shadow: 0 30px 80px rgba(0,0,0,0.8);
}

/* Хедер системы */
.system-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 32px;
}

.system-logo {
    background: var(--accent);
    width: 48px; height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 900;
    font-size: 1.2rem;
    box-shadow: 0 0 20px rgba(0, 120, 212, 0.4);
}

.system-title h1 { font-size: 1.4rem; font-weight: 700; line-height: 1; }
.system-title span { font-size: 0.75rem; color: var(--text-dim); text-transform: uppercase; letter-spacing: 1px; }

/* Навигация табов */
.auth-nav {
    display: grid;
    grid-template-columns: 1fr 1fr;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 12px;
    padding: 4px;
    margin-bottom: 32px;
}

.nav-btn {
    background: transparent;
    border: none;
    color: var(--text-dim);
    padding: 10px;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    transition: 0.3s;
}

.nav-btn.active {
    background: rgba(255, 255, 255, 0.07);
    color: var(--text);
}

/* Формы */
.auth-view { display: none; flex-direction: column; gap: 20px; }
.auth-view.active { display: flex; animation: slideIn 0.4s ease-out; }

@keyframes slideIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.view-header h2 { font-size: 1.6rem; margin-bottom: 4px; }
.view-header p { font-size: 0.9rem; color: var(--text-dim); }

/* Группы ввода */
.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-size: 0.8rem;
    color: var(--text-dim);
    font-weight: 600;
    margin-left: 4px;
}

.form-group input, .form-group textarea {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 14px 16px;
    color: white;
    font-size: 1rem;
    transition: 0.3s;
}

.form-group input:focus {
    border-color: var(--accent);
    background: rgba(255, 255, 255, 0.07);
    outline: none;
}

/* Кнопки действий */
.action-btn {
    background: var(--accent);
    color: white;
    border: none;
    padding: 16px;
    border-radius: 12px;
    font-weight: 700;
    font-size: 1rem;
    cursor: pointer;
    transition: 0.3s;
    margin-top: 10px;
}

.action-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(0, 120, 212, 0.4);
}

.action-btn.secondary {
    background: linear-gradient(135deg, #0078d4, #6a11cb);
}

.system-footer {
    text-align: center;
    margin-top: 32px;
    font-size: 0.7rem;
    color: var(--text-dim);
    letter-spacing: 0.5px;
}