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

body {
    font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, 'Roboto', sans-serif;
    min-height: 100vh;
    background: linear-gradient(135deg, #0f0c29, #302b63, #24243e);
    background-attachment: fixed;
    overflow-x: hidden;
}

/* Анимированные фоновые шары */
.orb {
    position: fixed;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.5;
    z-index: 0;
    animation: float 20s infinite ease-in-out;
}

.orb-1 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, #4facfe, #00f2fe);
    top: -150px;
    left: -150px;
    animation-delay: 0s;
}

.orb-2 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, #43e97b, #38f9d7);
    bottom: -200px;
    right: -200px;
    animation-delay: 5s;
}

.orb-3 {
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, #fa709a, #fee140);
    top: 50%;
    left: 70%;
    animation-delay: 10s;
}

.orb-4 {
    width: 350px;
    height: 350px;
    background: radial-gradient(circle, #a18cd1, #fbc2eb);
    bottom: 30%;
    left: -100px;
    animation-delay: 3s;
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    33% {
        transform: translate(30px, -40px) scale(1.1);
    }
    66% {
        transform: translate(-20px, 30px) scale(0.9);
    }
}

.container {
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    z-index: 1;
    padding: 1.5rem;
}

/* Glassmorphism блок */
.auth-box {
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(20px);
    border-radius: 32px;
    padding: 2.5rem;
    width: 100%;
    max-width: 460px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25),
                0 0 0 1px rgba(255, 255, 255, 0.1);
    animation: slideUp 0.6s cubic-bezier(0.16, 1, 0.3, 1);
    transition: transform 0.3s ease;
}

.auth-box:hover {
    transform: translateY(-5px);
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.logo-wrapper {
    text-align: center;
    margin-bottom: 2rem;
}

.logo-icon {
    font-size: 3rem;
    font-weight: 800;
    background: linear-gradient(135deg, #fff, #a5b4fc);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    margin-bottom: 0.5rem;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.7;
    }
}

.auth-box h1 {
    font-size: 1.8rem;
    font-weight: 600;
    background: linear-gradient(135deg, #ffffff, #c7d2fe);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    margin-bottom: 0.25rem;
}

.auth-box p {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.85rem;
}

/* Табы */
.tabs {
    display: flex;
    gap: 1rem;
    margin: 2rem 0 1.5rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 60px;
    padding: 0.25rem;
}

.tab-btn {
    flex: 1;
    padding: 0.75rem;
    border: none;
    background: transparent;
    cursor: pointer;
    border-radius: 60px;
    font-weight: 600;
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.6);
    transition: all 0.3s ease;
}

.tab-btn.active {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.tab-btn:hover:not(.active) {
    background: rgba(255, 255, 255, 0.1);
    color: white;
}

/* Формы */
.form-container {
    display: none;
    animation: fadeIn 0.4s ease;
}

.form-container.active {
    display: block;
}

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

.input-group {
    position: relative;
    margin-bottom: 1.75rem;
}

.input-group input {
    width: 100%;
    padding: 1rem 1rem 0.5rem 1rem;
    font-size: 1rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 16px;
    outline: none;
    color: white;
    transition: all 0.3s ease;
}

.input-group input:focus {
    border-color: #4facfe;
    background: rgba(255, 255, 255, 0.1);
    box-shadow: 0 0 0 3px rgba(79, 172, 254, 0.2);
}

.input-group label {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: rgba(255, 255, 255, 0.5);
    transition: all 0.2s ease;
    pointer-events: none;
    font-size: 0.95rem;
}

.input-group input:focus ~ label,
.input-group input:not(:placeholder-shown) ~ label {
    top: 0.2rem;
    font-size: 0.7rem;
    color: #4facfe;
}

/* Кнопка с анимацией свечения */
.glow-btn {
    width: 100%;
    padding: 1rem;
    font-size: 1rem;
    font-weight: 700;
    border: none;
    border-radius: 40px;
    background: linear-gradient(135deg, #4facfe, #00f2fe);
    color: white;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
    margin-top: 0.5rem;
}

.glow-btn:hover {
    transform: scale(1.02);
    box-shadow: 0 0 25px rgba(79, 172, 254, 0.6);
}

.glow-btn:active {
    transform: scale(0.98);
}

/* Error */
.error {
    color: #ff6b6b;
    margin-top: 1rem;
    font-size: 0.85rem;
    text-align: center;
    animation: shake 0.3s ease;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

/* Адаптив */
@media (max-width: 500px) {
    .auth-box {
        padding: 1.8rem;
    }
    
    .logo-icon {
        font-size: 2.5rem;
    }
    
    .auth-box h1 {
        font-size: 1.5rem;
    }
}