body {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-bg);
    position: relative;
    overflow: hidden;
}

.particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}

.particle {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.12);
    animation: floatUp linear infinite;
}

@keyframes floatUp {
    0% {
        transform: translateY(100vh) scale(0);
        opacity: 0;
    }
    10% {
        opacity: 1;
    }
    90% {
        opacity: 1;
    }
    100% {
        transform: translateY(-10vh) scale(1);
        opacity: 0;
    }
}

.login-container {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 420px;
    padding: 20px;
}

.login-card {
    padding: 40px 32px;
    text-align: center;
    background: var(--glass-bg-strong);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
}

.login-card .login-icon {
    font-size: 48px;
    margin-bottom: 12px;
}

.login-card h1 {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.login-card .login-desc {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 28px;
}

.login-card .input {
    text-align: center;
    font-size: 16px;
    padding: 14px 16px;
    margin-bottom: 16px;
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
}

.login-card .input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-light);
}

.login-card .btn {
    width: 100%;
    padding: 14px;
    font-size: 16px;
    margin-bottom: 16px;
    border-radius: var(--radius-md);
}

.login-card .error-msg {
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    background: rgba(239, 68, 68, 0.15);
    color: var(--danger);
    font-size: 14px;
    margin-bottom: 16px;
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.login-footer {
    margin-top: 16px;
    font-size: 13px;
}

.login-footer a {
    color: var(--text-muted);
}

.login-footer a:hover {
    color: var(--accent);
}

.theme-toggle-btn {
    position: fixed;
    top: 20px;
    right: 20px;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--glass-bg-strong);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--glass-border);
    cursor: pointer;
    font-size: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    transition: all 0.2s;
    box-shadow: var(--glass-shadow);
}

.theme-toggle-btn:hover {
    background: var(--glass-bg);
    transform: scale(1.05);
}